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| 128 | .rm #[ #] #H #V #F C
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| 129 | .\" ========================================================================
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| 130 | .\"
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| 131 | .IX Title "FFMPEG 1"
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| 132 | .TH FFMPEG 1 "2006-06-30" " " " "
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| 133 | .SH "NAME"
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| 134 | ffmpeg \- FFmpeg video converter
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| 135 | .SH "SYNOPSIS"
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| 136 | .IX Header "SYNOPSIS"
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| 137 | ffmpeg [[infile options][\fB\-i\fR \fIinfile\fR]]... {[outfile options] \fIoutfile\fR}...
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| 138 | .SH "DESCRIPTION"
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| 139 | .IX Header "DESCRIPTION"
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| 140 | If no input file is given, audio/video grabbing is done.
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| 141 | .PP
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| 142 | As a general rule, options are applied to the next specified
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| 143 | file. For example, if you give the \fB\-b 64\fR option, it sets the video
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| 144 | bitrate of the next file. The format option may be needed for raw input
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| 145 | files.
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| 146 | .PP
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| 147 | By default, FFmpeg tries to convert as losslessly as possible: It
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| 148 | uses the same audio and video parameters for the outputs as the one
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| 149 | specified for the inputs.
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| 150 | .SH "OPTIONS"
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| 151 | .IX Header "OPTIONS"
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| 152 | .Sh "Main options"
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| 153 | .IX Subsection "Main options"
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| 154 | .IP "\fB\-L\fR" 4
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| 155 | .IX Item "-L"
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| 156 | Show license.
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| 157 | .IP "\fB\-h\fR" 4
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| 158 | .IX Item "-h"
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| 159 | Show help.
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| 160 | .IP "\fB\-formats\fR" 4
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| 161 | .IX Item "-formats"
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| 162 | Show available formats, codecs, protocols, ...
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| 163 | .IP "\fB\-f fmt\fR" 4
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| 164 | .IX Item "-f fmt"
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| 165 | Force format.
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| 166 | .IP "\fB\-i filename\fR" 4
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| 167 | .IX Item "-i filename"
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| 168 | input filename
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| 169 | .IP "\fB\-y\fR" 4
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| 170 | .IX Item "-y"
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| 171 | Overwrite output files.
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| 172 | .IP "\fB\-t duration\fR" 4
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| 173 | .IX Item "-t duration"
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| 174 | Set the recording time in seconds.
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| 175 | \&\f(CW\*(C`hh:mm:ss[.xxx]\*(C'\fR syntax is also supported.
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| 176 | .IP "\fB\-ss position\fR" 4
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| 177 | .IX Item "-ss position"
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| 178 | Seek to given time position in seconds.
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| 179 | \&\f(CW\*(C`hh:mm:ss[.xxx]\*(C'\fR syntax is also supported.
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| 180 | .IP "\fB\-title string\fR" 4
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| 181 | .IX Item "-title string"
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| 182 | Set the title.
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| 183 | .IP "\fB\-author string\fR" 4
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| 184 | .IX Item "-author string"
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| 185 | Set the author.
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| 186 | .IP "\fB\-copyright string\fR" 4
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| 187 | .IX Item "-copyright string"
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| 188 | Set the copyright.
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| 189 | .IP "\fB\-comment string\fR" 4
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| 190 | .IX Item "-comment string"
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| 191 | Set the comment.
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| 192 | .IP "\fB\-target type\fR" 4
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| 193 | .IX Item "-target type"
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| 194 | Specify target file type (\*(L"vcd\*(R", \*(L"svcd\*(R", \*(L"dvd\*(R", \*(L"dv\*(R", \*(L"pal\-vcd\*(R",
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| 195 | \&\*(L"ntsc\-svcd\*(R", ... ). All the format options (bitrate, codecs,
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| 196 | buffer sizes) are then set automatically. You can just type:
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| 197 | .Sp
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| 198 | .Vb 1
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| 199 | \& ffmpeg -i myfile.avi -target vcd /tmp/vcd.mpg
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| 200 | .Ve
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| 201 | .Sp
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| 202 | Nevertheless you can specify additional options as long as you know
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| 203 | they do not conflict with the standard, as in:
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| 204 | .Sp
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| 205 | .Vb 1
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| 206 | \& ffmpeg -i myfile.avi -target vcd -bf 2 /tmp/vcd.mpg
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| 207 | .Ve
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| 208 | .IP "\fB\-hq\fR" 4
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| 209 | .IX Item "-hq"
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| 210 | Activate high quality settings.
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| 211 | .IP "\fB\-itsoffset offset\fR" 4
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| 212 | .IX Item "-itsoffset offset"
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| 213 | Set the input time offset in seconds.
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| 214 | \&\f(CW\*(C`[\-]hh:mm:ss[.xxx]\*(C'\fR syntax is also supported.
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| 215 | This option affects all the input files that follow it.
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| 216 | The offset is added to the timestamps of the input files.
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| 217 | Specifying a positive offset means that the corresponding
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| 218 | streams are delayed by 'offset' seconds.
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| 219 | .Sh "Video Options"
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| 220 | .IX Subsection "Video Options"
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| 221 | .IP "\fB\-b bitrate\fR" 4
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| 222 | .IX Item "-b bitrate"
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| 223 | Set the video bitrate in kbit/s (default = 200 kb/s).
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| 224 | .IP "\fB\-r fps\fR" 4
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| 225 | .IX Item "-r fps"
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| 226 | Set frame rate (default = 25).
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| 227 | .IP "\fB\-s size\fR" 4
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| 228 | .IX Item "-s size"
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| 229 | Set frame size. The format is \fBwxh\fR (default = 160x128).
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| 230 | The following abbreviations are recognized:
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| 231 | .RS 4
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| 232 | .IP "\fBsqcif\fR" 4
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| 233 | .IX Item "sqcif"
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| 234 | 128x96
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| 235 | .IP "\fBqcif\fR" 4
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| 236 | .IX Item "qcif"
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| 237 | 176x144
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| 238 | .IP "\fBcif\fR" 4
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| 239 | .IX Item "cif"
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| 240 | 352x288
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| 241 | .IP "\fB4cif\fR" 4
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| 242 | .IX Item "4cif"
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| 243 | 704x576
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| 244 | .RE
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| 245 | .RS 4
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| 246 | .RE
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| 247 | .IP "\fB\-aspect aspect\fR" 4
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| 248 | .IX Item "-aspect aspect"
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| 249 | Set aspect ratio (4:3, 16:9 or 1.3333, 1.7777).
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| 250 | .IP "\fB\-croptop size\fR" 4
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| 251 | .IX Item "-croptop size"
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| 252 | Set top crop band size (in pixels).
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| 253 | .IP "\fB\-cropbottom size\fR" 4
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| 254 | .IX Item "-cropbottom size"
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|---|
| 255 | Set bottom crop band size (in pixels).
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| 256 | .IP "\fB\-cropleft size\fR" 4
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| 257 | .IX Item "-cropleft size"
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|---|
| 258 | Set left crop band size (in pixels).
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| 259 | .IP "\fB\-cropright size\fR" 4
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| 260 | .IX Item "-cropright size"
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| 261 | Set right crop band size (in pixels).
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| 262 | .IP "\fB\-padtop size\fR" 4
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| 263 | .IX Item "-padtop size"
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| 264 | Set top pad band size (in pixels).
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| 265 | .IP "\fB\-padbottom size\fR" 4
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| 266 | .IX Item "-padbottom size"
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| 267 | Set bottom pad band size (in pixels).
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| 268 | .IP "\fB\-padleft size\fR" 4
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| 269 | .IX Item "-padleft size"
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| 270 | Set left pad band size (in pixels).
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| 271 | .IP "\fB\-padright size\fR" 4
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| 272 | .IX Item "-padright size"
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| 273 | Set right pad band size (in pixels).
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| 274 | .IP "\fB\-padcolor (hex color)\fR" 4
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| 275 | .IX Item "-padcolor (hex color)"
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| 276 | Set color of padded bands. The value for padcolor is expressed
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| 277 | as a six digit hexadecimal number where the first two digits
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| 278 | represent red, the middle two digits green and last two digits
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| 279 | blue (default = 000000 (black)).
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| 280 | .IP "\fB\-vn\fR" 4
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| 281 | .IX Item "-vn"
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| 282 | Disable video recording.
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| 283 | .IP "\fB\-bt tolerance\fR" 4
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| 284 | .IX Item "-bt tolerance"
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| 285 | Set video bitrate tolerance (in kbit/s).
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| 286 | .IP "\fB\-maxrate bitrate\fR" 4
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| 287 | .IX Item "-maxrate bitrate"
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| 288 | Set max video bitrate tolerance (in kbit/s).
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| 289 | .IP "\fB\-minrate bitrate\fR" 4
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| 290 | .IX Item "-minrate bitrate"
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| 291 | Set min video bitrate tolerance (in kbit/s).
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| 292 | .IP "\fB\-bufsize size\fR" 4
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| 293 | .IX Item "-bufsize size"
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| 294 | Set rate control buffer size (in kbit).
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| 295 | .IP "\fB\-vcodec codec\fR" 4
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| 296 | .IX Item "-vcodec codec"
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| 297 | Force video codec to \fIcodec\fR. Use the \f(CW\*(C`copy\*(C'\fR special value to
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| 298 | tell that the raw codec data must be copied as is.
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| 299 | .IP "\fB\-sameq\fR" 4
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| 300 | .IX Item "-sameq"
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| 301 | Use same video quality as source (implies \s-1VBR\s0).
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| 302 | .IP "\fB\-pass n\fR" 4
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| 303 | .IX Item "-pass n"
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| 304 | Select the pass number (1 or 2). It is useful to do two pass
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| 305 | encoding. The statistics of the video are recorded in the first
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| 306 | pass and the video is generated at the exact requested bitrate
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| 307 | in the second pass.
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| 308 | .IP "\fB\-passlogfile file\fR" 4
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| 309 | .IX Item "-passlogfile file"
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| 310 | Set two pass logfile name to \fIfile\fR.
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| 311 | .Sh "Advanced Video Options"
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| 312 | .IX Subsection "Advanced Video Options"
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| 313 | .IP "\fB\-g gop_size\fR" 4
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| 314 | .IX Item "-g gop_size"
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| 315 | Set the group of pictures size.
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| 316 | .IP "\fB\-intra\fR" 4
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| 317 | .IX Item "-intra"
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| 318 | Use only intra frames.
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| 319 | .IP "\fB\-qscale q\fR" 4
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| 320 | .IX Item "-qscale q"
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| 321 | Use fixed video quantiser scale (\s-1VBR\s0).
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| 322 | .IP "\fB\-qmin q\fR" 4
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| 323 | .IX Item "-qmin q"
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| 324 | minimum video quantiser scale (\s-1VBR\s0)
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| 325 | .IP "\fB\-qmax q\fR" 4
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| 326 | .IX Item "-qmax q"
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|---|
| 327 | maximum video quantiser scale (\s-1VBR\s0)
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| 328 | .IP "\fB\-qdiff q\fR" 4
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| 329 | .IX Item "-qdiff q"
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| 330 | maximum difference between the quantiser scales (\s-1VBR\s0)
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| 331 | .IP "\fB\-qblur blur\fR" 4
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| 332 | .IX Item "-qblur blur"
|
|---|
| 333 | video quantiser scale blur (\s-1VBR\s0)
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| 334 | .IP "\fB\-qcomp compression\fR" 4
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| 335 | .IX Item "-qcomp compression"
|
|---|
| 336 | video quantiser scale compression (\s-1VBR\s0)
|
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| 337 | .IP "\fB\-rc_init_cplx complexity\fR" 4
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| 338 | .IX Item "-rc_init_cplx complexity"
|
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| 339 | initial complexity for single pass encoding
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| 340 | .IP "\fB\-b_qfactor factor\fR" 4
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| 341 | .IX Item "-b_qfactor factor"
|
|---|
| 342 | qp factor between P\- and B\-frames
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| 343 | .IP "\fB\-i_qfactor factor\fR" 4
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| 344 | .IX Item "-i_qfactor factor"
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| 345 | qp factor between P\- and I\-frames
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| 346 | .IP "\fB\-b_qoffset offset\fR" 4
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| 347 | .IX Item "-b_qoffset offset"
|
|---|
| 348 | qp offset between P\- and B\-frames
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| 349 | .IP "\fB\-i_qoffset offset\fR" 4
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| 350 | .IX Item "-i_qoffset offset"
|
|---|
| 351 | qp offset between P\- and I\-frames
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| 352 | .IP "\fB\-rc_eq equation\fR" 4
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| 353 | .IX Item "-rc_eq equation"
|
|---|
| 354 | Set rate control equation (default = \f(CW\*(C`tex^qComp\*(C'\fR).
|
|---|
| 355 | .IP "\fB\-rc_override override\fR" 4
|
|---|
| 356 | .IX Item "-rc_override override"
|
|---|
| 357 | rate control override for specific intervals
|
|---|
| 358 | .IP "\fB\-me method\fR" 4
|
|---|
| 359 | .IX Item "-me method"
|
|---|
| 360 | Set motion estimation method to \fImethod\fR.
|
|---|
| 361 | Available methods are (from lowest to best quality):
|
|---|
| 362 | .RS 4
|
|---|
| 363 | .IP "\fBzero\fR" 4
|
|---|
| 364 | .IX Item "zero"
|
|---|
| 365 | Try just the (0, 0) vector.
|
|---|
| 366 | .IP "\fBphods\fR" 4
|
|---|
| 367 | .IX Item "phods"
|
|---|
| 368 | .PD 0
|
|---|
| 369 | .IP "\fBlog\fR" 4
|
|---|
| 370 | .IX Item "log"
|
|---|
| 371 | .IP "\fBx1\fR" 4
|
|---|
| 372 | .IX Item "x1"
|
|---|
| 373 | .IP "\fBepzs\fR" 4
|
|---|
| 374 | .IX Item "epzs"
|
|---|
| 375 | .PD
|
|---|
| 376 | (default method)
|
|---|
| 377 | .IP "\fBfull\fR" 4
|
|---|
| 378 | .IX Item "full"
|
|---|
| 379 | exhaustive search (slow and marginally better than epzs)
|
|---|
| 380 | .RE
|
|---|
| 381 | .RS 4
|
|---|
| 382 | .RE
|
|---|
| 383 | .IP "\fB\-dct_algo algo\fR" 4
|
|---|
| 384 | .IX Item "-dct_algo algo"
|
|---|
| 385 | Set \s-1DCT\s0 algorithm to \fIalgo\fR. Available values are:
|
|---|
| 386 | .RS 4
|
|---|
| 387 | .IP "\fB0\fR" 4
|
|---|
| 388 | .IX Item "0"
|
|---|
| 389 | \&\s-1FF_DCT_AUTO\s0 (default)
|
|---|
| 390 | .IP "\fB1\fR" 4
|
|---|
| 391 | .IX Item "1"
|
|---|
| 392 | \&\s-1FF_DCT_FASTINT\s0
|
|---|
| 393 | .IP "\fB2\fR" 4
|
|---|
| 394 | .IX Item "2"
|
|---|
| 395 | \&\s-1FF_DCT_INT\s0
|
|---|
| 396 | .IP "\fB3\fR" 4
|
|---|
| 397 | .IX Item "3"
|
|---|
| 398 | \&\s-1FF_DCT_MMX\s0
|
|---|
| 399 | .IP "\fB4\fR" 4
|
|---|
| 400 | .IX Item "4"
|
|---|
| 401 | \&\s-1FF_DCT_MLIB\s0
|
|---|
| 402 | .IP "\fB5\fR" 4
|
|---|
| 403 | .IX Item "5"
|
|---|
| 404 | \&\s-1FF_DCT_ALTIVEC\s0
|
|---|
| 405 | .RE
|
|---|
| 406 | .RS 4
|
|---|
| 407 | .RE
|
|---|
| 408 | .IP "\fB\-idct_algo algo\fR" 4
|
|---|
| 409 | .IX Item "-idct_algo algo"
|
|---|
| 410 | Set \s-1IDCT\s0 algorithm to \fIalgo\fR. Available values are:
|
|---|
| 411 | .RS 4
|
|---|
| 412 | .IP "\fB0\fR" 4
|
|---|
| 413 | .IX Item "0"
|
|---|
| 414 | \&\s-1FF_IDCT_AUTO\s0 (default)
|
|---|
| 415 | .IP "\fB1\fR" 4
|
|---|
| 416 | .IX Item "1"
|
|---|
| 417 | \&\s-1FF_IDCT_INT\s0
|
|---|
| 418 | .IP "\fB2\fR" 4
|
|---|
| 419 | .IX Item "2"
|
|---|
| 420 | \&\s-1FF_IDCT_SIMPLE\s0
|
|---|
| 421 | .IP "\fB3\fR" 4
|
|---|
| 422 | .IX Item "3"
|
|---|
| 423 | \&\s-1FF_IDCT_SIMPLEMMX\s0
|
|---|
| 424 | .IP "\fB4\fR" 4
|
|---|
| 425 | .IX Item "4"
|
|---|
| 426 | \&\s-1FF_IDCT_LIBMPEG2MMX\s0
|
|---|
| 427 | .IP "\fB5\fR" 4
|
|---|
| 428 | .IX Item "5"
|
|---|
| 429 | \&\s-1FF_IDCT_PS2\s0
|
|---|
| 430 | .IP "\fB6\fR" 4
|
|---|
| 431 | .IX Item "6"
|
|---|
| 432 | \&\s-1FF_IDCT_MLIB\s0
|
|---|
| 433 | .IP "\fB7\fR" 4
|
|---|
| 434 | .IX Item "7"
|
|---|
| 435 | \&\s-1FF_IDCT_ARM\s0
|
|---|
| 436 | .IP "\fB8\fR" 4
|
|---|
| 437 | .IX Item "8"
|
|---|
| 438 | \&\s-1FF_IDCT_ALTIVEC\s0
|
|---|
| 439 | .IP "\fB9\fR" 4
|
|---|
| 440 | .IX Item "9"
|
|---|
| 441 | \&\s-1FF_IDCT_SH4\s0
|
|---|
| 442 | .IP "\fB10\fR" 4
|
|---|
| 443 | .IX Item "10"
|
|---|
| 444 | \&\s-1FF_IDCT_SIMPLEARM\s0
|
|---|
| 445 | .RE
|
|---|
| 446 | .RS 4
|
|---|
| 447 | .RE
|
|---|
| 448 | .IP "\fB\-er n\fR" 4
|
|---|
| 449 | .IX Item "-er n"
|
|---|
| 450 | Set error resilience to \fIn\fR.
|
|---|
| 451 | .RS 4
|
|---|
| 452 | .IP "\fB1\fR" 4
|
|---|
| 453 | .IX Item "1"
|
|---|
| 454 | \&\s-1FF_ER_CAREFUL\s0 (default)
|
|---|
| 455 | .IP "\fB2\fR" 4
|
|---|
| 456 | .IX Item "2"
|
|---|
| 457 | \&\s-1FF_ER_COMPLIANT\s0
|
|---|
| 458 | .IP "\fB3\fR" 4
|
|---|
| 459 | .IX Item "3"
|
|---|
| 460 | \&\s-1FF_ER_AGGRESSIVE\s0
|
|---|
| 461 | .IP "\fB4\fR" 4
|
|---|
| 462 | .IX Item "4"
|
|---|
| 463 | \&\s-1FF_ER_VERY_AGGRESSIVE\s0
|
|---|
| 464 | .RE
|
|---|
| 465 | .RS 4
|
|---|
| 466 | .RE
|
|---|
| 467 | .IP "\fB\-ec bit_mask\fR" 4
|
|---|
| 468 | .IX Item "-ec bit_mask"
|
|---|
| 469 | Set error concealment to \fIbit_mask\fR. \fIbit_mask\fR is a bit mask of
|
|---|
| 470 | the following values:
|
|---|
| 471 | .RS 4
|
|---|
| 472 | .IP "\fB1\fR" 4
|
|---|
| 473 | .IX Item "1"
|
|---|
| 474 | \&\s-1FF_EC_GUESS_MVS\s0 (default = enabled)
|
|---|
| 475 | .IP "\fB2\fR" 4
|
|---|
| 476 | .IX Item "2"
|
|---|
| 477 | \&\s-1FF_EC_DEBLOCK\s0 (default = enabled)
|
|---|
| 478 | .RE
|
|---|
| 479 | .RS 4
|
|---|
| 480 | .RE
|
|---|
| 481 | .IP "\fB\-bf frames\fR" 4
|
|---|
| 482 | .IX Item "-bf frames"
|
|---|
| 483 | Use 'frames' B\-frames (supported for \s-1MPEG\-1\s0, \s-1MPEG\-2\s0 and \s-1MPEG\-4\s0).
|
|---|
| 484 | .IP "\fB\-mbd mode\fR" 4
|
|---|
| 485 | .IX Item "-mbd mode"
|
|---|
| 486 | macroblock decision
|
|---|
| 487 | .RS 4
|
|---|
| 488 | .IP "\fB0\fR" 4
|
|---|
| 489 | .IX Item "0"
|
|---|
| 490 | \&\s-1FF_MB_DECISION_SIMPLE:\s0 Use mb_cmp (cannot change it yet in FFmpeg).
|
|---|
| 491 | .IP "\fB1\fR" 4
|
|---|
| 492 | .IX Item "1"
|
|---|
| 493 | \&\s-1FF_MB_DECISION_BITS:\s0 Choose the one which needs the fewest bits.
|
|---|
| 494 | .IP "\fB2\fR" 4
|
|---|
| 495 | .IX Item "2"
|
|---|
| 496 | \&\s-1FF_MB_DECISION_RD:\s0 rate distortion
|
|---|
| 497 | .RE
|
|---|
| 498 | .RS 4
|
|---|
| 499 | .RE
|
|---|
| 500 | .IP "\fB\-4mv\fR" 4
|
|---|
| 501 | .IX Item "-4mv"
|
|---|
| 502 | Use four motion vector by macroblock (\s-1MPEG\-4\s0 only).
|
|---|
| 503 | .IP "\fB\-part\fR" 4
|
|---|
| 504 | .IX Item "-part"
|
|---|
| 505 | Use data partitioning (\s-1MPEG\-4\s0 only).
|
|---|
| 506 | .IP "\fB\-bug param\fR" 4
|
|---|
| 507 | .IX Item "-bug param"
|
|---|
| 508 | Work around encoder bugs that are not auto\-detected.
|
|---|
| 509 | .IP "\fB\-strict strictness\fR" 4
|
|---|
| 510 | .IX Item "-strict strictness"
|
|---|
| 511 | How strictly to follow the standards.
|
|---|
| 512 | .IP "\fB\-aic\fR" 4
|
|---|
| 513 | .IX Item "-aic"
|
|---|
| 514 | Enable Advanced intra coding (h263+).
|
|---|
| 515 | .IP "\fB\-umv\fR" 4
|
|---|
| 516 | .IX Item "-umv"
|
|---|
| 517 | Enable Unlimited Motion Vector (h263+)
|
|---|
| 518 | .IP "\fB\-deinterlace\fR" 4
|
|---|
| 519 | .IX Item "-deinterlace"
|
|---|
| 520 | Deinterlace pictures.
|
|---|
| 521 | .IP "\fB\-interlace\fR" 4
|
|---|
| 522 | .IX Item "-interlace"
|
|---|
| 523 | Force interlacing support in encoder (\s-1MPEG\-2\s0 and \s-1MPEG\-4\s0 only).
|
|---|
| 524 | Use this option if your input file is interlaced and you want
|
|---|
| 525 | to keep the interlaced format for minimum losses.
|
|---|
| 526 | The alternative is to deinterlace the input stream with
|
|---|
| 527 | \&\fB\-deinterlace\fR, but deinterlacing introduces losses.
|
|---|
| 528 | .IP "\fB\-psnr\fR" 4
|
|---|
| 529 | .IX Item "-psnr"
|
|---|
| 530 | Calculate \s-1PSNR\s0 of compressed frames.
|
|---|
| 531 | .IP "\fB\-vstats\fR" 4
|
|---|
| 532 | .IX Item "-vstats"
|
|---|
| 533 | Dump video coding statistics to \fIvstats_HHMMSS.log\fR.
|
|---|
| 534 | .IP "\fB\-vhook module\fR" 4
|
|---|
| 535 | .IX Item "-vhook module"
|
|---|
| 536 | Insert video processing \fImodule\fR. \fImodule\fR contains the module
|
|---|
| 537 | name and its parameters separated by spaces.
|
|---|
| 538 | .Sh "Audio Options"
|
|---|
| 539 | .IX Subsection "Audio Options"
|
|---|
| 540 | .IP "\fB\-ar freq\fR" 4
|
|---|
| 541 | .IX Item "-ar freq"
|
|---|
| 542 | Set the audio sampling frequency (default = 44100 Hz).
|
|---|
| 543 | .IP "\fB\-ab bitrate\fR" 4
|
|---|
| 544 | .IX Item "-ab bitrate"
|
|---|
| 545 | Set the audio bitrate in kbit/s (default = 64).
|
|---|
| 546 | .IP "\fB\-ac channels\fR" 4
|
|---|
| 547 | .IX Item "-ac channels"
|
|---|
| 548 | Set the number of audio channels (default = 1).
|
|---|
| 549 | .IP "\fB\-an\fR" 4
|
|---|
| 550 | .IX Item "-an"
|
|---|
| 551 | Disable audio recording.
|
|---|
| 552 | .IP "\fB\-acodec codec\fR" 4
|
|---|
| 553 | .IX Item "-acodec codec"
|
|---|
| 554 | Force audio codec to \fIcodec\fR. Use the \f(CW\*(C`copy\*(C'\fR special value to
|
|---|
| 555 | specify that the raw codec data must be copied as is.
|
|---|
| 556 | .Sh "Audio/Video grab options"
|
|---|
| 557 | .IX Subsection "Audio/Video grab options"
|
|---|
| 558 | .IP "\fB\-vd device\fR" 4
|
|---|
| 559 | .IX Item "-vd device"
|
|---|
| 560 | sEt video grab device (e.g. \fI/dev/video0\fR).
|
|---|
| 561 | .IP "\fB\-vc channel\fR" 4
|
|---|
| 562 | .IX Item "-vc channel"
|
|---|
| 563 | Set video grab channel (\s-1DV1394\s0 only).
|
|---|
| 564 | .IP "\fB\-tvstd standard\fR" 4
|
|---|
| 565 | .IX Item "-tvstd standard"
|
|---|
| 566 | Set television standard (\s-1NTSC\s0, \s-1PAL\s0 (\s-1SECAM\s0)).
|
|---|
| 567 | .IP "\fB\-dv1394\fR" 4
|
|---|
| 568 | .IX Item "-dv1394"
|
|---|
| 569 | Set \s-1DV1394\s0 grab.
|
|---|
| 570 | .IP "\fB\-ad device\fR" 4
|
|---|
| 571 | .IX Item "-ad device"
|
|---|
| 572 | Set audio device (e.g. \fI/dev/dsp\fR).
|
|---|
| 573 | .Sh "Advanced options"
|
|---|
| 574 | .IX Subsection "Advanced options"
|
|---|
| 575 | .IP "\fB\-map file:stream\fR" 4
|
|---|
| 576 | .IX Item "-map file:stream"
|
|---|
| 577 | Set input stream mapping.
|
|---|
| 578 | .IP "\fB\-debug\fR" 4
|
|---|
| 579 | .IX Item "-debug"
|
|---|
| 580 | Print specific debug info.
|
|---|
| 581 | .IP "\fB\-benchmark\fR" 4
|
|---|
| 582 | .IX Item "-benchmark"
|
|---|
| 583 | Add timings for benchmarking.
|
|---|
| 584 | .IP "\fB\-hex\fR" 4
|
|---|
| 585 | .IX Item "-hex"
|
|---|
| 586 | Dump each input packet.
|
|---|
| 587 | .IP "\fB\-bitexact\fR" 4
|
|---|
| 588 | .IX Item "-bitexact"
|
|---|
| 589 | Only use bit exact algorithms (for codec testing).
|
|---|
| 590 | .IP "\fB\-ps size\fR" 4
|
|---|
| 591 | .IX Item "-ps size"
|
|---|
| 592 | Set packet size in bits.
|
|---|
| 593 | .IP "\fB\-re\fR" 4
|
|---|
| 594 | .IX Item "-re"
|
|---|
| 595 | Read input at native frame rate. Mainly used to simulate a grab device.
|
|---|
| 596 | .IP "\fB\-loop\fR" 4
|
|---|
| 597 | .IX Item "-loop"
|
|---|
| 598 | Loop over the input stream. Currently it works only for image
|
|---|
| 599 | streams. This option is used for automatic FFserver testing.
|
|---|
| 600 | .IP "\fB\-loop_output number_of_times\fR" 4
|
|---|
| 601 | .IX Item "-loop_output number_of_times"
|
|---|
| 602 | Repeatedly loop output for formats that support looping such as animated \s-1GIF\s0
|
|---|
| 603 | (0 will loop the output infinitely).
|
|---|
| 604 | .Sh "FFmpeg formula evaluator"
|
|---|
| 605 | .IX Subsection "FFmpeg formula evaluator"
|
|---|
| 606 | When evaluating a rate control string, FFmpeg uses an internal formula
|
|---|
| 607 | evaluator.
|
|---|
| 608 | .PP
|
|---|
| 609 | The following binary operators are available: \f(CW\*(C`+\*(C'\fR, \f(CW\*(C`\-\*(C'\fR,
|
|---|
| 610 | \&\f(CW\*(C`*\*(C'\fR, \f(CW\*(C`/\*(C'\fR, \f(CW\*(C`^\*(C'\fR.
|
|---|
| 611 | .PP
|
|---|
| 612 | The following unary operators are available: \f(CW\*(C`+\*(C'\fR, \f(CW\*(C`\-\*(C'\fR,
|
|---|
| 613 | \&\f(CW\*(C`(...)\*(C'\fR.
|
|---|
| 614 | .PP
|
|---|
| 615 | The following functions are available:
|
|---|
| 616 | .IP "\fIsinh(x)\fR" 4
|
|---|
| 617 | .IX Item "sinh(x)"
|
|---|
| 618 | .PD 0
|
|---|
| 619 | .IP "\fIcosh(x)\fR" 4
|
|---|
| 620 | .IX Item "cosh(x)"
|
|---|
| 621 | .IP "\fItanh(x)\fR" 4
|
|---|
| 622 | .IX Item "tanh(x)"
|
|---|
| 623 | .IP "\fIsin(x)\fR" 4
|
|---|
| 624 | .IX Item "sin(x)"
|
|---|
| 625 | .IP "\fIcos(x)\fR" 4
|
|---|
| 626 | .IX Item "cos(x)"
|
|---|
| 627 | .IP "\fItan(x)\fR" 4
|
|---|
| 628 | .IX Item "tan(x)"
|
|---|
| 629 | .IP "\fIexp(x)\fR" 4
|
|---|
| 630 | .IX Item "exp(x)"
|
|---|
| 631 | .IP "\fIlog(x)\fR" 4
|
|---|
| 632 | .IX Item "log(x)"
|
|---|
| 633 | .IP "\fIsquish(x)\fR" 4
|
|---|
| 634 | .IX Item "squish(x)"
|
|---|
| 635 | .IP "\fIgauss(x)\fR" 4
|
|---|
| 636 | .IX Item "gauss(x)"
|
|---|
| 637 | .IP "\fIabs(x)\fR" 4
|
|---|
| 638 | .IX Item "abs(x)"
|
|---|
| 639 | .IP "\fImax(x, y)\fR" 4
|
|---|
| 640 | .IX Item "max(x, y)"
|
|---|
| 641 | .IP "\fImin(x, y)\fR" 4
|
|---|
| 642 | .IX Item "min(x, y)"
|
|---|
| 643 | .IP "\fIgt(x, y)\fR" 4
|
|---|
| 644 | .IX Item "gt(x, y)"
|
|---|
| 645 | .IP "\fIlt(x, y)\fR" 4
|
|---|
| 646 | .IX Item "lt(x, y)"
|
|---|
| 647 | .IP "\fIeq(x, y)\fR" 4
|
|---|
| 648 | .IX Item "eq(x, y)"
|
|---|
| 649 | .IP "\fIbits2qp(bits)\fR" 4
|
|---|
| 650 | .IX Item "bits2qp(bits)"
|
|---|
| 651 | .IP "\fIqp2bits(qp)\fR" 4
|
|---|
| 652 | .IX Item "qp2bits(qp)"
|
|---|
| 653 | .PD
|
|---|
| 654 | .PP
|
|---|
| 655 | The following constants are available:
|
|---|
| 656 | .IP "\fI\s-1PI\s0\fR" 4
|
|---|
| 657 | .IX Item "PI"
|
|---|
| 658 | .PD 0
|
|---|
| 659 | .IP "\fIE\fR" 4
|
|---|
| 660 | .IX Item "E"
|
|---|
| 661 | .IP "\fIiTex\fR" 4
|
|---|
| 662 | .IX Item "iTex"
|
|---|
| 663 | .IP "\fIpTex\fR" 4
|
|---|
| 664 | .IX Item "pTex"
|
|---|
| 665 | .IP "\fItex\fR" 4
|
|---|
| 666 | .IX Item "tex"
|
|---|
| 667 | .IP "\fImv\fR" 4
|
|---|
| 668 | .IX Item "mv"
|
|---|
| 669 | .IP "\fIfCode\fR" 4
|
|---|
| 670 | .IX Item "fCode"
|
|---|
| 671 | .IP "\fIiCount\fR" 4
|
|---|
| 672 | .IX Item "iCount"
|
|---|
| 673 | .IP "\fImcVar\fR" 4
|
|---|
| 674 | .IX Item "mcVar"
|
|---|
| 675 | .IP "\fIvar\fR" 4
|
|---|
| 676 | .IX Item "var"
|
|---|
| 677 | .IP "\fIisI\fR" 4
|
|---|
| 678 | .IX Item "isI"
|
|---|
| 679 | .IP "\fIisP\fR" 4
|
|---|
| 680 | .IX Item "isP"
|
|---|
| 681 | .IP "\fIisB\fR" 4
|
|---|
| 682 | .IX Item "isB"
|
|---|
| 683 | .IP "\fIavgQP\fR" 4
|
|---|
| 684 | .IX Item "avgQP"
|
|---|
| 685 | .IP "\fIqComp\fR" 4
|
|---|
| 686 | .IX Item "qComp"
|
|---|
| 687 | .IP "\fIavgIITex\fR" 4
|
|---|
| 688 | .IX Item "avgIITex"
|
|---|
| 689 | .IP "\fIavgPITex\fR" 4
|
|---|
| 690 | .IX Item "avgPITex"
|
|---|
| 691 | .IP "\fIavgPPTex\fR" 4
|
|---|
| 692 | .IX Item "avgPPTex"
|
|---|
| 693 | .IP "\fIavgBPTex\fR" 4
|
|---|
| 694 | .IX Item "avgBPTex"
|
|---|
| 695 | .IP "\fIavgTex\fR" 4
|
|---|
| 696 | .IX Item "avgTex"
|
|---|
| 697 | .PD
|
|---|
| 698 | .SH "EXAMPLES"
|
|---|
| 699 | .IX Header "EXAMPLES"
|
|---|
| 700 | .Sh "Video and Audio grabbing"
|
|---|
| 701 | .IX Subsection "Video and Audio grabbing"
|
|---|
| 702 | FFmpeg can use a video4linux compatible video source and any Open Sound
|
|---|
| 703 | System audio source:
|
|---|
| 704 | .PP
|
|---|
| 705 | .Vb 1
|
|---|
| 706 | \& ffmpeg /tmp/out.mpg
|
|---|
| 707 | .Ve
|
|---|
| 708 | .PP
|
|---|
| 709 | Note that you must activate the right video source and channel before
|
|---|
| 710 | launching FFmpeg with any \s-1TV\s0 viewer such as xawtv
|
|---|
| 711 | (<\fBhttp://bytesex.org/xawtv/\fR>) by Gerd Knorr. You also
|
|---|
| 712 | have to set the audio recording levels correctly with a
|
|---|
| 713 | standard mixer.
|
|---|
| 714 | .Sh "Video and Audio file format conversion"
|
|---|
| 715 | .IX Subsection "Video and Audio file format conversion"
|
|---|
| 716 | * FFmpeg can use any supported file format and protocol as input:
|
|---|
| 717 | .PP
|
|---|
| 718 | Examples:
|
|---|
| 719 | .PP
|
|---|
| 720 | * You can use \s-1YUV\s0 files as input:
|
|---|
| 721 | .PP
|
|---|
| 722 | .Vb 1
|
|---|
| 723 | \& ffmpeg -i /tmp/test%d.Y /tmp/out.mpg
|
|---|
| 724 | .Ve
|
|---|
| 725 | .PP
|
|---|
| 726 | It will use the files:
|
|---|
| 727 | .PP
|
|---|
| 728 | .Vb 2
|
|---|
| 729 | \& /tmp/test0.Y, /tmp/test0.U, /tmp/test0.V,
|
|---|
| 730 | \& /tmp/test1.Y, /tmp/test1.U, /tmp/test1.V, etc...
|
|---|
| 731 | .Ve
|
|---|
| 732 | .PP
|
|---|
| 733 | The Y files use twice the resolution of the U and V files. They are
|
|---|
| 734 | raw files, without header. They can be generated by all decent video
|
|---|
| 735 | decoders. You must specify the size of the image with the \fB\-s\fR option
|
|---|
| 736 | if FFmpeg cannot guess it.
|
|---|
| 737 | .PP
|
|---|
| 738 | * You can input from a raw \s-1YUV420P\s0 file:
|
|---|
| 739 | .PP
|
|---|
| 740 | .Vb 1
|
|---|
| 741 | \& ffmpeg -i /tmp/test.yuv /tmp/out.avi
|
|---|
| 742 | .Ve
|
|---|
| 743 | .PP
|
|---|
| 744 | test.yuv is a file containing raw \s-1YUV\s0 planar data. Each frame is composed
|
|---|
| 745 | of the Y plane followed by the U and V planes at half vertical and
|
|---|
| 746 | horizontal resolution.
|
|---|
| 747 | .PP
|
|---|
| 748 | * You can output to a raw \s-1YUV420P\s0 file:
|
|---|
| 749 | .PP
|
|---|
| 750 | .Vb 1
|
|---|
| 751 | \& ffmpeg -i mydivx.avi hugefile.yuv
|
|---|
| 752 | .Ve
|
|---|
| 753 | .PP
|
|---|
| 754 | * You can set several input files and output files:
|
|---|
| 755 | .PP
|
|---|
| 756 | .Vb 1
|
|---|
| 757 | \& ffmpeg -i /tmp/a.wav -s 640x480 -i /tmp/a.yuv /tmp/a.mpg
|
|---|
| 758 | .Ve
|
|---|
| 759 | .PP
|
|---|
| 760 | Converts the audio file a.wav and the raw \s-1YUV\s0 video file a.yuv
|
|---|
| 761 | to \s-1MPEG\s0 file a.mpg.
|
|---|
| 762 | .PP
|
|---|
| 763 | * You can also do audio and video conversions at the same time:
|
|---|
| 764 | .PP
|
|---|
| 765 | .Vb 1
|
|---|
| 766 | \& ffmpeg -i /tmp/a.wav -ar 22050 /tmp/a.mp2
|
|---|
| 767 | .Ve
|
|---|
| 768 | .PP
|
|---|
| 769 | Converts a.wav to \s-1MPEG\s0 audio at 22050Hz sample rate.
|
|---|
| 770 | .PP
|
|---|
| 771 | * You can encode to several formats at the same time and define a
|
|---|
| 772 | mapping from input stream to output streams:
|
|---|
| 773 | .PP
|
|---|
| 774 | .Vb 1
|
|---|
| 775 | \& ffmpeg -i /tmp/a.wav -ab 64 /tmp/a.mp2 -ab 128 /tmp/b.mp2 -map 0:0 -map 0:0
|
|---|
| 776 | .Ve
|
|---|
| 777 | .PP
|
|---|
| 778 | Converts a.wav to a.mp2 at 64 kbits and to b.mp2 at 128 kbits. '\-map
|
|---|
| 779 | file:index' specifies which input stream is used for each output
|
|---|
| 780 | stream, in the order of the definition of output streams.
|
|---|
| 781 | .PP
|
|---|
| 782 | * You can transcode decrypted VOBs
|
|---|
| 783 | .PP
|
|---|
| 784 | .Vb 1
|
|---|
| 785 | \& ffmpeg -i snatch_1.vob -f avi -vcodec mpeg4 -b 800 -g 300 -bf 2 -acodec mp3 -ab 128 snatch.avi
|
|---|
| 786 | .Ve
|
|---|
| 787 | .PP
|
|---|
| 788 | This is a typical \s-1DVD\s0 ripping example; the input is a \s-1VOB\s0 file, the
|
|---|
| 789 | output an \s-1AVI\s0 file with \s-1MPEG\-4\s0 video and \s-1MP3\s0 audio. Note that in this
|
|---|
| 790 | command we use B\-frames so the \s-1MPEG\-4\s0 stream is DivX5 compatible, and
|
|---|
| 791 | \&\s-1GOP\s0 size is 300 which means one intra frame every 10 seconds for 29.97fps
|
|---|
| 792 | input video. Furthermore, the audio stream is MP3\-encoded so you need
|
|---|
| 793 | to enable \s-1LAME\s0 support by passing \f(CW\*(C`\-\-enable\-mp3lame\*(C'\fR to configure.
|
|---|
| 794 | The mapping is particularly useful for \s-1DVD\s0 transcoding
|
|---|
| 795 | to get the desired audio language.
|
|---|
| 796 | .PP
|
|---|
| 797 | \&\s-1NOTE:\s0 To see the supported input formats, use \f(CW\*(C`ffmpeg \-formats\*(C'\fR.
|
|---|
| 798 | .SH "SEE ALSO"
|
|---|
| 799 | .IX Header "SEE ALSO"
|
|---|
| 800 | \&\fIffserver\fR\|(1), \fIffplay\fR\|(1) and the \s-1HTML\s0 documentation of \fIffmpeg\fR.
|
|---|
| 801 | .SH "AUTHOR"
|
|---|
| 802 | .IX Header "AUTHOR"
|
|---|
| 803 | Fabrice Bellard
|
|---|
