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dwbuiten / FFmpeg

mirror of git://git.videolan.org/ffmpeg.git
http://ffmpeg.org
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duration is slightly off #33

Closed michaelni closed 8 years ago

michaelni commented 8 years ago

./ffmpeg -i matrixbench_mpeg2.mpg -t 1 t1.mkv ./ffprobe t1.mkv

Stream #0:0: Video: h264 (High), yuv420p, 720x576 [SAR 16:15 DAR 4:3], 25 fps, 25 tbr, 1k tbn (default) Metadata: ENCODER : Lavc57.33.100 libx264 DURATION : 00:00:01.00300000

vs. Stream #0:0: Video: h264 (High), yuv420p, 720x576 [SAR 16:15 DAR 4:3], 25 fps, 25 tbr, 1k tbn (default) Metadata: ENCODER : Lavc57.33.100 libx264 DURATION : 00:00:00.963000000

michaelni commented 8 years ago

I think this represents a significant number of the one/few byte differences ive seen/mentioned

ghost commented 8 years ago

What do byte differences have to do with duration differences?

richardpl commented 8 years ago

And real duration is?

michaelni commented 8 years ago

On Fri, Apr 08, 2016 at 06:26:43AM -0700, V. Lang wrote:

What do byte differences have to do with duration differences?

I had mentioned byte differences in the output files o IRC IIRC this difference in the duration seems to be the cause of most of the output file byte differences that i had seen

Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The misfortune of the wise is better than the prosperity of the fool. -- Epicurus

michaelni commented 8 years ago

the real duration should be 1 second due to -t 1 there are also 25 frames stored and decoded, it just seems some duration "metadata" is off