[vlc] vlc stutters on 3.9 linux kernel

Grant emailgrant at gmail.com
Fri Apr 26 22:05:57 CEST 2013


>>>>>>>> 3.8 works great but vlc stutters a bit on 3.9.  If I use jack the
>>>>>>>> sound is very bad like the CPU can't keep up but top shows 90% of
>>>>>>>> the
>>>>>>>> CPU idle.  If I don't use jack the sound is fine but I notice the
>>>>>>>> video stutters a bit.  mplayer and mpd work fine.
>>>>>>>>
>>>>>>>> - Grant
>>>
>>> You're STILL having that problem?
>>
>> Yes, I just tried 3.9-rc8 but the problem persists.
>>
>>> Since VLC's video rendering is different from mplayer, it might be
>>> triggering a bug in this particular kernel.
>>>
>>> How about compiling with --
>>>
>>> X a52 aac aalib alsa avcodec avformat dbus dirac dts dvbpsi dvd
>>> elibc_glibc
>>> ffmpeg flac libass libsamplerate matroska mmx mp3 mpeg musepack ogg
>>> opengl
>>> png qt4 schroedinger sdl sdl-image sid speex sse svg swscale taglib
>>> theora
>>> truetype twolame udev vorbis x264 xcb xv
>>
>> Just tried that but same result.
>>
>>> Also run VLC with
>>>
>>> vlc --verbose 2147483647
>>>
>>> Check it out yourself and attach it here.
>>
>> I've attached it.  I think the problem is here:
>>
>> [0x7f2ba4000958] main audio output warning: PTS is out of range
>> (-9941), dropping buffer
>> [0x7f2ba4000958] main audio output warning: PTS is out of range
>> (-33889), dropping buffer
>> [0x7f2ba40030e8] mpgatofixed32 audio filter debug: libmad error: bad
>> main_data_begin pointer
>> [0x7f2ba4000958] main audio output warning: audio output out of sync,
>> adjusting dates (70832 us)
>> [0x7f2bac06ca68] main video output debug: picture might be displayed
>> late (missing 10 ms)
>> [0x7f2ba4000958] main audio output warning: not synchronized (70834
>> us), resampling
>> [0x7f2ba4000958] main audio output warning: buffer too late  (70417),
>> up-sampling
>> [0x7f2ba4000958] main audio output debug: audio output is starving
>> (-89164), playing silence
>> [0x7f2ba4000958] main audio output debug: audio output is starving
>> (-68444), playing silence
>
>
> How about playing a file with no audio?

What should I check for?  The problem only manifests itself by way of
stuttery audio.

- Grant



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