[Ffmpeg-devel] [BUGREPORT] ffplay plays video and audio 20% to fast

[Benjamin Larsson]

Gunnar von Boehn wrote:

> BUGREPORT: FFplay plays video and audio about 20% to fast.
>
> Verified on two Linux x86 installs with most current svn tree.
>
>
> I'll quickly summerize what we know so far:
>
>
> FFplay plays a number of videos much to fast
> (about 20% to fast) on my Linux desktop machines.
> All other video players (VLC/MediaPlayer/Realplayer) play the video
> correctly.
>
> Herve has reported that the bug did not show on his MAC OS X.
> I have verified the bug of FFplay on Linux compiling a fresh svn tree
> right now.
>
>
> On my two x86 Linux systems (Duron and Athlon64)
> FFplay plays hunderts of my H264 videos with mp3 sound, about 20% to
> fast.
> Problem: The video and sound are to fast. The video seems not to be
> evenly too fast, it looks like sometimes its a bit faster than 20% and
> then maybe about normal speed. But this might be related to decoding
> speed? The audio plays too fast as well, and has bad disorder noises.
> My linux systems are running Debian Linux Kernel 2.6.9-x1 and Debian
> Kernel 2.4.26
>
>
>
>
> How to repeat:
>
> - check out and compile newest ffplay
>
> - download test video
> http://www.greyhound-data.com/movies/IE/SPK/2006/SPK-2006-09-02-HT09.avi
>
> - ffplay SPK-2006-09-02-HT09.avi
>
>
> Stats of the test video
>   Duration: 00:01:02.9, start: 0.000000, bitrate: 475 kb/s
>   Stream #0.0: Video: h264, yuv420p, 352x224, 25.00 fps(r)
>   Stream #0.1: Audio: mp3, 24000 Hz, mono, 32 kb/s

This is a MPEG-2.5 sample rate, the problem could be the handling of those.

>
>
>
> I hope this bug report is helpfull for you.
> If you need more information to fix this please tell me.
> Can you verify the issue on Linux?
> Would it be helpful for you if I provide the buggy ffplay binary for
> download?
>
>
> Cheers
> Gunnar

MvH
Benjamin Larsson

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