[MPlayer-users] Neomagic audio OSS delay problem

[Arpi]

Hi,

your oss driver has buggy GETODELAY ioctl... ask its author, not our bug
(since 0.50 mplayer uses this OSS ioctl to sync audio&video)

> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
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> Hi
> First of all, thanks for that impressive program.
> I'm experimenting these little problem since version 0.50, the next one to
> the  
> 0.17 IdegCounter. The problem appears when playing every file with oss as 
> audio output method. Every file, even little MPEGs that put CPU at 30% load 
> or less, is played without problems, except that the video isn't played 
> smoothly, it's played in bursts. I explain myself: you've got played every 
> frame that the video has, it's not like the effect of using framedrop when 
> CPU is at high load. The audio works well, and there is no A-V desync. So the 
> problem is only that video is played in bursts, each one every second or so.
> Since I couldn't use oss as sound output, I began to use SDL audio output 
> without a problem. But I think that in my situation, SDL audio output eats a 
> little more CPU than oss output, so I started trying with every option 
> mplayer has. Finally, I discovered that using -dapsync, the problem 
> dissapears.
> My sound card is a Neomagic 256ZX, running on a Dell Latitude CPT C333GT.
> My actual version of MPlayer is 0.90pre6. This is a sample output:
> 
> [...]
> AUDIO: 44100 Hz, 2 ch, sfmt: 0x10 (2 bps), ratio: 16000->176400 (128.0 kbit)
> [...]
> AO: [oss] 44100Hz 2ch Signed 16-bit (Little-Endian)
> [...]
> A-V SYNC: FRAMEDROP (SH_AV_delay=-0.172)!   7/  7   0%  0%  0.0% 11 0 0%
> A-V SYNC: FRAMEDROP (SH_AV_delay=-0.136)!   8/  8   0%  0%  0.0% 12 0 0%
> A-V SYNC: FRAMEDROP (SH_AV_delay=-0.121)!   9/  9   0%  0%  0.0% 13 0 0%
> WARNING: A-V SYNC LAG TOO LARGE: 0.042 {0.047 - 0.005} (too little 
> UNEXP_CORR_MAX?)
> WARNING: A-V SYNC LAG TOO LARGE: 0.044 {0.044 - 0.001} (too little 
> UNEXP_CORR_MAX?)
> A-V SYNC: FRAMEDROP (SH_AV_delay=-0.101)! 370/370  15%  7%  2.8% 14 0 0%
> A-V SYNC: FRAMEDROP (SH_AV_delay=-0.088)! 371/371  15%  7%  2.9% 15 0 0%
> WARNING: A-V SYNC LAG TOO LARGE: 0.046 {0.035 - -0.010} (too little 
> UNEXP_CORR_MAX?)
> A-V SYNC: FRAMEDROP (SH_AV_delay=-0.104)! 889/889  16%  6%  2.8% 16 0 0%
> A-V SYNC: FRAMEDROP (SH_AV_delay=-0.091)! 890/890  16%  6%  2.8% 17 0 0%
> A-V SYNC: FRAMEDROP (SH_AV_delay=-0.081)! 892/892  16%  7%  2.8% 18 0 0%
> WARNING: A-V SYNC LAG TOO LARGE: 0.044 {0.041 - -0.003} (too little 
> UNEXP_CORR_MAX?)
> A:  68.8 V:  68.8 A-V: -0.008 ct: -0.248  1719/1719  16%  7%  2.7% 19 0 0%
> 
> Any suggestions?
> 
> Thank you for your time
> - -- 
>    .-.    
>     oo|    Yari Adán Petralanda, a.k.a. mustang
>    /`'\          
>   (\_;/)           http://www.yadan.org
>                          
> - --
> Alas, how love can trifle with itself!
> 		-- William Shakespeare, "The Two Gentlemen of Verona"
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A'rpi / Astral & ESP-team

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Developer of MPlayer, the Movie Player for Linux - http://www.MPlayerHQ.hu