[FFmpeg-user] Clock gap problem

Tomi tomi.myllyla at screenpeak.com
Wed Jun 8 12:27:54 CEST 2011


Hi, 

There seems to be following hanging problem when ffmpeg is used for
transcoding from vlc:

2011-05-18 00:24:53 [0x1021970] main input warning: clock gap, unexpected 
stream discontinuity 
0x1021970] main input warning: feeding synchro with a new reference point 
trying to recover from clock gap 
2011-05-18 13:16:20 mb incr damaged 
2011-05-18 13:16:20 [0x7fab300343e0] avcodec encoder warning: almost fed 
libavcodec with a frame in the past (current: 1695556067861, last: 
1699689600301) 

It seems that this 'almost fed libavcodec..' error at VLC comes from 
modules/codec/avcodec/encoder.c:907 check, iirc in libav/ffmpeg didn't 
like if pts-values weren't monotonic. 

We could  comment out that if clause in code and recompile that module but 
it might not be good idea as it is doing this timing check. 

Any ideas what is causing this? We would really appreciate help in this.

Tomi


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