[FFmpeg-trac] #377(undetermined:new): ffmpeg reports inaccurate length of some gxf files
FFmpeg
trac at avcodec.org
Tue Aug 2 21:43:12 CEST 2011
#377: ffmpeg reports inaccurate length of some gxf files
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Reporter: acloutier | Owner:
Type: defect | Status: new
Priority: important | Component: undetermined
Version: git | Resolution:
Keywords: gxf ffmpeg length bug | Blocked By:
Blocking: | Reproduced: 0
Analyzed: 0 |
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Comment (by reimar):
No, -r will only change the "playback" fps, but it will not change the
time base the demuxer uses internally.
However you can at least easily detect the two cases:
119.88 tbn, 59.94 tbc
The tbn value is the time base the demuxer detects. tbc is the one that is
encoded in the MPEG-2 stream within the container. For GXF and ordinary
use cases it's probably reasonable to assume that if they mismatch there's
something wrong.
For the "good" file these match btw:
59.94 tbn, 59.94 tbc
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Ticket URL: <https://avcodec.org/trac/ffmpeg/ticket/377#comment:6>
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