Re: vlc stutters on 3.9 linux kernel

On 04/27/13 01:35, Grant wrote:
>>>>>>>>> 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.

Ha! I didn't know that (or I forgot)!

You should check inside CONFIG_SND. See if the kernel configuration is 
identical with the old kernel and this one.

Also with mplayer what audio output you're using?

Then this maybe a libmad problem, how about playing some audio/video 
with wav/PCM audio?

Also has the video strutting stopped when you use alsa output?
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