[FFmpeg-user] Past duration 0.999992 too large with x264/x265 high framerate elemental streams.

[Andy Furniss]

Carl Eugen Hoyos wrote:
> Andy Furniss <adf.lists <at> gmail.com> writes:
>
>> I know I can work round with -vsync 0, but it seems odd
>> that 50/60 fps elemental streams have this issue, even
>> with no sound.
>
> I don't know if this is the issue here, but please
> remember that h264 timestamps are generally an issue
> for FFmpeg, also reproducible with some of the
> conformance samples iirc.

I don't know, but hevc is the same and trying a different test
below also reproduces.

If I use -r 30 (source is 25) I don't get the dup/logging but with
-r 50 I do, so it seems framerate is relevant.

ffmpeg -an -sn -r 50 -i ~/burosch2.mpg -f rawvideo -y /dev/null
ffmpeg version N-78859-g5afe918 Copyright (c) 2000-2016 the FFmpeg 
developers
   built with gcc 5.3.0 (GCC)
   configuration: --prefix=/usr --disable-doc --enable-gpl 
--enable-libzimg --enable-libvpx --enable-libx265 --enable-libmp3lame 
--enable-libx264
   libavutil      55. 19.100 / 55. 19.100
   libavcodec     57. 27.101 / 57. 27.101
   libavformat    57. 27.101 / 57. 27.101
   libavdevice    57.  0.101 / 57.  0.101
   libavfilter     6. 38.100 /  6. 38.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
   libpostproc    54.  0.100 / 54.  0.100
Input #0, mpeg, from '/home/andy/burosch2.mpg':
   Duration: 00:00:39.96, start: 0.500000, bitrate: 8038 kb/s
     Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv), 720x576 
[SAR 64:45 DAR 16:9], 8000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
Output #0, rawvideo, to '/dev/null':
   Metadata:
     encoder         : Lavf57.27.101
     Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 720x576 
[SAR 64:45 DAR 16:9], q=2-31, 200 kb/s, 50 fps, 50 tbn, 50 tbc
     Metadata:
       encoder         : Lavc57.27.101 rawvideo
Stream mapping:
   Stream #0:0 -> #0:0 (mpeg2video (native) -> rawvideo (native))
Press [q] to stop, [?] for help
Past duration 0.999992 too large
     Last message repeated 398 times
Past duration 0.999992 too large  243608kB time=00:00:08.02 
bitrate=248832.0kbits/s dup=1 drop=0 speed=  16x
     Last message repeated 383 times
Past duration 0.999992 too large  476888kB time=00:00:15.70 
bitrate=248832.0kbits/s dup=1 drop=0 speed=15.7x
     Last message repeated 215 times
frame= 1001 fps=821 q=-0.0 Lsize=  608108kB time=00:00:20.02 
bitrate=248832.0kbits/s dup=1 drop=0 speed=16.4x
video:608108kB audio:0kB subtitle:0kB other streams:0kB global 
headers:0kB muxing overhead: 0.000000%




>
> Carl Eugen
>
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