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| author | Stefano Sabatini <stefasab@gmail.com> | 2013-10-29 11:33:51 +0100 |
|---|---|---|
| committer | Stefano Sabatini <stefasab@gmail.com> | 2013-10-29 18:30:27 +0100 |
| commit | 9fa0dccca6492b15849d025e006533d1cd21be6b (patch) | |
| tree | b74c89c046ab997c0e890a1a370fff95a14a884a | |
| parent | 61c1f2cb1e7ef80725d3ae5e8af267add60d058e (diff) | |
| download | ffmpeg-9fa0dccca6492b15849d025e006533d1cd21be6b.tar.gz | |
lavc: extend documentation for the "bf" option
| -rw-r--r-- | doc/codecs.texi | 8 | ||||
| -rw-r--r-- | libavcodec/options_table.h | 2 |
2 files changed, 8 insertions, 2 deletions
diff --git a/doc/codecs.texi b/doc/codecs.texi index e79e462146..1606f6c5c9 100644 --- a/doc/codecs.texi +++ b/doc/codecs.texi @@ -172,7 +172,13 @@ Set max video quantizer scale (VBR). Must be included between -1 and Set max difference between the quantizer scale (VBR). @item bf @var{integer} (@emph{encoding,video}) -Set max number of B frames. +Set max number of B frames between non-B-frames. + +Must be an integer between -1 and 16. 0 means that B-frames are +disabled. If a value of -1 is used, it will choose an automatic value +depending on the encoder. + +Default value is 0. @item b_qfactor @var{float} (@emph{encoding,video}) Set qp factor between P and B frames. diff --git a/libavcodec/options_table.h b/libavcodec/options_table.h index 8912ff6c4e..f57704e258 100644 --- a/libavcodec/options_table.h +++ b/libavcodec/options_table.h @@ -105,7 +105,7 @@ static const AVOption avcodec_options[] = { {"qmin", "minimum video quantizer scale (VBR)", OFFSET(qmin), AV_OPT_TYPE_INT, {.i64 = 2 }, -1, 69, V|E}, {"qmax", "maximum video quantizer scale (VBR)", OFFSET(qmax), AV_OPT_TYPE_INT, {.i64 = 31 }, -1, 1024, V|E}, {"qdiff", "maximum difference between the quantizer scales (VBR)", OFFSET(max_qdiff), AV_OPT_TYPE_INT, {.i64 = 3 }, INT_MIN, INT_MAX, V|E}, -{"bf", "use 'frames' B frames", OFFSET(max_b_frames), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, -1, FF_MAX_B_FRAMES, V|E}, +{"bf", "set maximum number of B frames between non-B-frames", OFFSET(max_b_frames), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, -1, FF_MAX_B_FRAMES, V|E}, {"b_qfactor", "QP factor between P- and B-frames", OFFSET(b_quant_factor), AV_OPT_TYPE_FLOAT, {.dbl = 1.25 }, -FLT_MAX, FLT_MAX, V|E}, {"rc_strategy", "ratecontrol method", OFFSET(rc_strategy), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, INT_MIN, INT_MAX, V|E}, {"b_strategy", "strategy to choose between I/P/B-frames", OFFSET(b_frame_strategy), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, V|E}, |