From 982783ac49c1a1f0739cad9cf0ec8a7b5d427e62 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 5 Feb 2012 05:14:26 +0100 Subject: [PATCH] ffmpeg: document avi special case Signed-off-by: Michael Niedermayer --- ffmpeg.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/ffmpeg.c b/ffmpeg.c index e83da3457c..3241bcbff7 100644 --- a/ffmpeg.c +++ b/ffmpeg.c @@ -2448,6 +2448,11 @@ static int transcode_init(OutputFile *output_files, int nb_output_files, codec->extradata_size= icodec->extradata_size; codec->time_base = ist->st->time_base; + /* + * Avi is a special case here because it supports variable fps but + * having the fps and timebase differe significantly adds quite some + * overhead + */ if(!strcmp(oc->oformat->name, "avi")) { if ( copy_tb<0 && av_q2d(icodec->time_base)*icodec->ticks_per_frame > 2*av_q2d(ist->st->time_base) && av_q2d(ist->st->time_base) < 1.0/500