[FFmpeg-devel] [RFC][PATCH] ticks_per_frame / timebase

Ivan Schreter schreter
Thu Feb 26 18:48:07 CET 2009

Michael Niedermayer wrote:
> Attached is a patch that adds ticks_per_frame, which is a convertion factor
> between the timebase and the "framerate" as stored in the header.
> the patch also adapts several uses of timebase that where using it in the
> meaning of the framerate
> this patch is based on the one from ivan
> i will commit this in a few hours if i receive no objections or better
> suggestions. (short delay because of the release ...)
Seems to work in general, but one small thing:

You forgot:

Index: libavformat/utils.c
--- libavformat/utils.c (revision 17619)
+++ libavformat/utils.c (working copy)
@@ -1994,7 +1994,6 @@
 /*       || c->codec_tag == AV_RL32("DIVX")
        || c->codec_tag == AV_RL32("XVID")*/
        || c->codec_id == CODEC_ID_MPEG2VIDEO
-       || c->codec_id == CODEC_ID_H264
         return 1;
     return 0;

Otherwise it's still going to estimate frame rate from field picture 
durations, resulting in 50fps for interlaced movies.



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