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Diffstat (limited to 'doc/ffmpeg.texi')
| -rw-r--r-- | doc/ffmpeg.texi | 242 |
1 files changed, 14 insertions, 228 deletions
diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi index 2cb1050b8e..402a4ae3fb 100644 --- a/doc/ffmpeg.texi +++ b/doc/ffmpeg.texi @@ -370,25 +370,7 @@ pad=width:height:x:y:color instead. @item -vn (@emph{output}) Disable video recording. -@item -bt @var{tolerance} -Set video bitrate tolerance (in bits, default 4000k). -Has a minimum value of: (target_bitrate/target_framerate). -In 1-pass mode, bitrate tolerance specifies how far ratecontrol is -willing to deviate from the target average bitrate value. This is -not related to min/max bitrate. Lowering tolerance too much has -an adverse effect on quality. -@item -maxrate @var{bitrate} -Set max video bitrate (in bit/s). -Requires -bufsize to be set. -@item -minrate @var{bitrate} -Set min video bitrate (in bit/s). -Most useful in setting up a CBR encode: -@example -ffmpeg -i myfile.avi -b:v 4000k -minrate 4000k -maxrate 4000k -bufsize 1835k out.m2v -@end example -It is of little use elsewise. -@item -bufsize @var{size} -Set video buffer verifier buffer size (in bits). + @item -vcodec @var{codec} (@emph{output}) Set the video codec. This is an alias for @code{-codec:v}. @item -same_quant @@ -435,197 +417,14 @@ Set pixel format. Use @code{-pix_fmts} to show all the supported pixel formats. @item -sws_flags @var{flags} (@emph{input/output}) Set SwScaler flags. -@item -g @var{gop_size} -Set the group of pictures size. -@item -intra -deprecated, use -g 1 @item -vdt @var{n} Discard threshold. -@item -qmin @var{q} -minimum video quantizer scale (VBR) -@item -qmax @var{q} -maximum video quantizer scale (VBR) -@item -qdiff @var{q} -maximum difference between the quantizer scales (VBR) -@item -qblur @var{blur} -video quantizer scale blur (VBR) (range 0.0 - 1.0) -@item -qcomp @var{compression} -video quantizer scale compression (VBR) (default 0.5). -Constant of ratecontrol equation. Recommended range for default rc_eq: 0.0-1.0 - -@item -lmin @var{lambda} -minimum video lagrange factor (VBR) -@item -lmax @var{lambda} -max video lagrange factor (VBR) -@item -mblmin @var{lambda} -minimum macroblock quantizer scale (VBR) -@item -mblmax @var{lambda} -maximum macroblock quantizer scale (VBR) - -These four options (lmin, lmax, mblmin, mblmax) use 'lambda' units, -but you may use the QP2LAMBDA constant to easily convert from 'q' units: -@example -ffmpeg -i src.ext -lmax 21*QP2LAMBDA dst.ext -@end example - -@item -rc_init_cplx @var{complexity} -initial complexity for single pass encoding -@item -b_qfactor @var{factor} -qp factor between P- and B-frames -@item -i_qfactor @var{factor} -qp factor between P- and I-frames -@item -b_qoffset @var{offset} -qp offset between P- and B-frames -@item -i_qoffset @var{offset} -qp offset between P- and I-frames -@item -rc_eq @var{equation} -Set rate control equation (see section "Expression Evaluation") -(default = @code{tex^qComp}). - -When computing the rate control equation expression, besides the -standard functions defined in the section "Expression Evaluation", the -following functions are available: -@table @var -@item bits2qp(bits) -@item qp2bits(qp) -@end table - -and the following constants are available: -@table @var -@item iTex -@item pTex -@item tex -@item mv -@item fCode -@item iCount -@item mcVar -@item var -@item isI -@item isP -@item isB -@item avgQP -@item qComp -@item avgIITex -@item avgPITex -@item avgPPTex -@item avgBPTex -@item avgTex -@end table @item -rc_override[:@var{stream_specifier}] @var{override} (@emph{output,per-stream}) Rate control override for specific intervals, formatted as "int,int,int" list separated with slashes. Two first values are the beginning and end frame numbers, last one is quantizer to use if positive, or quality factor if negative. -@item -me_method @var{method} -Set motion estimation method to @var{method}. -Available methods are (from lowest to best quality): -@table @samp -@item zero -Try just the (0, 0) vector. -@item phods -@item log -@item x1 -@item hex -@item umh -@item epzs -(default method) -@item full -exhaustive search (slow and marginally better than epzs) -@end table - -@item -dct_algo @var{algo} -Set DCT algorithm to @var{algo}. Available values are: -@table @samp -@item 0 -FF_DCT_AUTO (default) -@item 1 -FF_DCT_FASTINT -@item 2 -FF_DCT_INT -@item 3 -FF_DCT_MMX -@item 4 -FF_DCT_MLIB -@item 5 -FF_DCT_ALTIVEC -@end table - -@item -idct_algo @var{algo} -Set IDCT algorithm to @var{algo}. Available values are: -@table @samp -@item 0 -FF_IDCT_AUTO (default) -@item 1 -FF_IDCT_INT -@item 2 -FF_IDCT_SIMPLE -@item 3 -FF_IDCT_SIMPLEMMX -@item 4 -FF_IDCT_LIBMPEG2MMX -@item 5 -FF_IDCT_PS2 -@item 6 -FF_IDCT_MLIB -@item 7 -FF_IDCT_ARM -@item 8 -FF_IDCT_ALTIVEC -@item 9 -FF_IDCT_SH4 -@item 10 -FF_IDCT_SIMPLEARM -@end table - -@item -er @var{n} -Set error resilience to @var{n}. -@table @samp -@item 1 -FF_ER_CAREFUL (default) -@item 2 -FF_ER_COMPLIANT -@item 3 -FF_ER_AGGRESSIVE -@item 4 -FF_ER_VERY_AGGRESSIVE -@end table - -@item -ec @var{bit_mask} -Set error concealment to @var{bit_mask}. @var{bit_mask} is a bit mask of -the following values: -@table @samp -@item 1 -FF_EC_GUESS_MVS (default = enabled) -@item 2 -FF_EC_DEBLOCK (default = enabled) -@end table - -@item -bf @var{frames} -Use 'frames' B-frames (supported for MPEG-1, MPEG-2 and MPEG-4). -@item -mbd @var{mode} -macroblock decision -@table @samp -@item 0 -FF_MB_DECISION_SIMPLE: Use mb_cmp (cannot change it yet in ffmpeg). -@item 1 -FF_MB_DECISION_BITS: Choose the one which needs the fewest bits. -@item 2 -FF_MB_DECISION_RD: rate distortion -@end table - -@item -4mv -Use four motion vector by macroblock (MPEG-4 only). -@item -part -Use data partitioning (MPEG-4 only). -@item -bug @var{param} -Work around encoder bugs that are not auto-detected. -@item -strict @var{strictness} -How strictly to follow the standards. -@item -aic -Enable Advanced intra coding (h263+). -@item -umv -Enable Unlimited Motion Vector (h263+) @item -deinterlace Deinterlace pictures. @@ -696,28 +495,6 @@ of supported sample formats. @table @option @item -atag @var{fourcc/tag} (@emph{output}) Force audio tag/fourcc. This is an alias for @code{-tag:a}. -@item -audio_service_type @var{type} -Set the type of service that the audio stream contains. -@table @option -@item ma -Main Audio Service (default) -@item ef -Effects -@item vi -Visually Impaired -@item hi -Hearing Impaired -@item di -Dialogue -@item co -Commentary -@item em -Emergency -@item vo -Voice Over -@item ka -Karaoke -@end table @item -absf @var{bitstream_filter} Deprecated, see -bsf @end table @@ -945,8 +722,6 @@ Exit after ffmpeg has been running for @var{duration} seconds. Dump each input packet to stderr. @item -hex (@emph{global}) When dumping packets, also dump the payload. -@item -ps @var{size} -Set RTP payload size in bytes. @item -re (@emph{input}) Read input at native frame rate. Mainly used to simulate a grab device. @item -loop_input @@ -957,8 +732,6 @@ This option is deprecated, use -loop 1. Repeatedly loop output for formats that support looping such as animated GIF (0 will loop the output infinitely). This option is deprecated, use -loop. -@item -threads @var{count} -Thread count. @item -vsync @var{parameter} Video sync method. For compatibility reasons old values can be specified as numbers. @@ -1294,6 +1067,19 @@ ffmpeg -i test1.avi -i test2.avi -map 0.3 -map 0.2 -map 0.1 -map 0.0 -c copy tes The resulting output file @file{test12.avi} will contain first four streams from the input file in reverse order. +@item +To force CBR video output: +@example +ffmpeg -i myfile.avi -b 4000k -minrate 4000k -maxrate 4000k -bufsize 1835k out.m2v +@end example + +@item +The four options lmin, lmax, mblmin and mblmax use 'lambda' units, +but you may use the QP2LAMBDA constant to easily convert from 'q' units: +@example +ffmpeg -i src.ext -lmax 21*QP2LAMBDA dst.ext +@end example + @end itemize @c man end EXAMPLES |