Re: [Alsa-user] a52 plugin: mplayer get A/V-async
On Fri, 01 Feb 2008 14:23:41 +0100 Johannes Bauer <[EMAIL PROTECTED]> wrote: > Alexander E. Patrakov schrieb: > > > I think it is a problem with mplayer or alsa-lib, not with a52 plugin, > > because I am able to reproduce a similar effect by just running dmix at > > 192 kHz 32 bit. To do so, create ~/.asoundrc that contains just two lines: > > > > defaults.pcm.dmix.rate 192000 > > defaults.pcm.dmix.format S32_LE > > > > To troubleshoot, try also running mplayer with "-ao sdl". > > Indeed, when I put those two lines to my ~/.asoundrc (my other > coniguration resides in /etc/asound.conf) I see the exact same effect on > videos which usually work. So it seems to be a format conversion problem? > I'd say you stress the whole audio system by forcing it work with higher throughput. Regards, Sergei. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
Re: [Alsa-user] a52 plugin: mplayer get A/V-async
Adam Nielsen schrieb:
>> >> When a movie doesn't play, it shows weird behaviour: the video is
>> >> playing *extremely* slowly, the audio plays just fine for about the
>> >> first 100 seconds. Then mplayer gets so out of sync that it commits
>> >> suicide in a way. Here is some output:
> >
> > IIRC mplayer uses the audio as a timing source, so if there are any
> > issues with the audio it throws out the timing of the whole movie.
> >
> > I would suggest trying the A/V sync options to see if you can improve
> > the behaviour at all (-framedrop, -hardframedrop, -mc)
Okay, I first expermiented with those: behaviour didn't change. Then I
tried "-autosync 30" which improved things a bit - movie was still
playing extremely slowly, but it at least *displayed* that A/V were in
sync. Well, no huge improvement...
Then I tried to insert a filter which always converts the sample rate to
48000 Hz (as this seems to work with one movie perfectly) - voila! Did
the trick!
I inserted (right after the default filter):
pcm.Filter_RateConvert {
type rate
slave {
pcm "Filter_Duplex"
rate 48000
}
}
> > Personally I've found ALSA's plugins very difficult to get working
> > reliably across a number of different programs, so the behaviour you
> > describe doesn't surprise me at all. I still can't play mono audio
> > through some programs.
This sounds a bit annoying - ALSA is supposed to be robust software (it
seems like it's been there forever) - is this part still work in progress?
Thanks all for your help and pointers!
Greetings,
Johannes
-
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Re: [Alsa-user] a52 plugin: mplayer get A/V-async
Alexander E. Patrakov schrieb: > I think it is a problem with mplayer or alsa-lib, not with a52 plugin, > because I am able to reproduce a similar effect by just running dmix at > 192 kHz 32 bit. To do so, create ~/.asoundrc that contains just two lines: > > defaults.pcm.dmix.rate 192000 > defaults.pcm.dmix.format S32_LE > > To troubleshoot, try also running mplayer with "-ao sdl". Indeed, when I put those two lines to my ~/.asoundrc (my other coniguration resides in /etc/asound.conf) I see the exact same effect on videos which usually work. So it seems to be a format conversion problem? The video which usually worked shows Opening audio decoder: [mp3lib] MPEG layer-2, layer-3 AUDIO: 48000 Hz, 2 ch, s16le, 128.0 kbit/8.33% (ratio: 16000->192000) Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3) The video which didn't Opening audio decoder: [mp3lib] MPEG layer-2, layer-3 AUDIO: 44100 Hz, 2 ch, s16le, 192.0 kbit/13.61% (ratio: 24000->176400) Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3) So - what can I do about it? Greetings, Johannes - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
Re: [Alsa-user] a52 plugin: mplayer get A/V-async
> When a movie doesn't play, it shows weird behaviour: the video is > playing *extremely* slowly, the audio plays just fine for about the > first 100 seconds. Then mplayer gets so out of sync that it commits > suicide in a way. Here is some output: IIRC mplayer uses the audio as a timing source, so if there are any issues with the audio it throws out the timing of the whole movie. I would suggest trying the A/V sync options to see if you can improve the behaviour at all (-framedrop, -hardframedrop, -mc) Personally I've found ALSA's plugins very difficult to get working reliably across a number of different programs, so the behaviour you describe doesn't surprise me at all. I still can't play mono audio through some programs. Cheers, Adam. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
Re: [Alsa-user] a52 plugin: mplayer get A/V-async
Johannes Bauer wrote: > Hello list, > > there's another problem I encountered with the a52 plugin *sigh*... I > have it setup so it does routing and then A52 encoding. Everything works > beautifully using xmms. Some movies play just fine with mplayer. Others > don't. I have no idea why. > > When a movie doesn't play, it shows weird behaviour: the video is > playing *extremely* slowly, the audio plays just fine for about the > first 100 seconds. Then mplayer gets so out of sync that it commits > suicide in a way. I think it is a problem with mplayer or alsa-lib, not with a52 plugin, because I am able to reproduce a similar effect by just running dmix at 192 kHz 32 bit. To do so, create ~/.asoundrc that contains just two lines: defaults.pcm.dmix.rate 192000 defaults.pcm.dmix.format S32_LE To troubleshoot, try also running mplayer with "-ao sdl". -- Alexander E. Patrakov - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
[Alsa-user] a52 plugin: mplayer get A/V-async
Hello list, there's another problem I encountered with the a52 plugin *sigh*... I have it setup so it does routing and then A52 encoding. Everything works beautifully using xmms. Some movies play just fine with mplayer. Others don't. I have no idea why. When a movie doesn't play, it shows weird behaviour: the video is playing *extremely* slowly, the audio plays just fine for about the first 100 seconds. Then mplayer gets so out of sync that it commits suicide in a way. Here is some output: At first: A: 2.0 V: 0.6 A-V: 1.420 ct: 0.022 12/ 10 ??% ??% ??,?% 5 0 Later on: A: 10.6 V: 1.7 A-V: 8.939 ct: 0.065 40/ 37 5% 1% 5.9% 32 0 You can see that while the audio stream is at 10.6 seconds, the video stream is still stuck at 1.7 seconds - 8.94 seconds delay. After a while, it does the following: Broken frame at 0x295AF0 A: 113.1 V: 15.9 A-V: 97.228 ct: 0.165 380/377 1% 1% 5.9% 350 0 Zu viele Videopakete im Puffer: (3742 in 8388936 Bytes). Vielleicht spielst du eine(n) nicht-interleaved Stream/Datei, oder der Codec funktioniert nicht. Versuche bei AVI-Dateien, den nicht-interleaved Modus mit der Option -ni zu erzwingen. [AO_ALSA] Schreibfehler: Broken pipe [AO_ALSA] Versuche Reset der Soundkarte. A: 113.1 V: 15.9 A-V: 97.230 ct: 0.169 381/378 1% 1% 5.9% 350 0 Or translated (by me, mplayer doesn't seem to do i18n) Broken frame at 0x295AF0 A: 113.1 V: 15.9 A-V: 97.228 ct: 0.165 380/377 1% 1% 5.9% 350 0 Too many pakets in videobuffer: (3742 in 8388936 Bytes). Maybe you're playing a non-interleaved stream/file, or the codec isn't working. Try to force non-interleaved mode with AVI-files with the -ni command line option. [AO_ALSA] Write error: Broken pipe [AO_ALSA] Trying to reset sound card. A: 113.1 V: 15.9 A-V: 97.230 ct: 0.169 381/378 1% 1% 5.9% 350 0 When I pass the -ao alsa:noblock option to mplayer, the error looks differnt: A/V doesn't get out of sync, but I get *tons* of this error message: [AO_ALSA] Write error: Resource temporarily unavailable 1.0% 51 0 [AO_ALSA] Trying to reset sound card. [AO_ALSA] Error preparing pcm: Device or resource busy And the audio breaks up permanently (sounding horrible). When I play directly (not using the A52 plugin, it works - but then I only get audio through my front speakers, which is not what I want). Is this an ALSA or mplayer problem? I hope someone knows... Thanks in advance, Johannes - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
