Re: [xine-user] how to fix occasional discarded frames?

[Michael R. <mr...@us...>]

Hi Brian,

> Running with --verbose I'm seeing record of occasional dropped
> frames. It's quite noticable when it happens. Here's a bit of the
> log:
>
> fixing sound card drift by -1250 pts
> fixing sound card drift by -1250 pts
> audio_decoder: error, unknown buffer type: 04000000
> audio_decoder: error, unknown buffer type: 01060000
> video_out: throwing away image with pts 440165438 because it's too
> old (diff : 3886). 200 frames delivered, 0 frames skipped, 1 frames
> discarded
> fixing sound card drift by -1250 pts
> fixing sound card drift by -1250 pts
> audio_decoder: error, unknown buffer type: 04000000
> audio_decoder: error, unknown buffer type: 01060000
> fixing sound card drift by -1250 pts
> video_out: throwing away image with pts 455946743 because it's too
> old (diff : 5816). 200 frames delivered, 0 frames skipped, 1 frames
> discarded
> fixing sound card drift by -1250 pts
> fixing sound card drift by -1250 pts
> fixing sound card drift by -1250 pts
> fixing sound card drift by -1250 pts
> audio_decoder: error, unknown buffer type: 04000000
> audio_decoder: error, unknown buffer type: 01060000
>
>
>
> Any ideas about what could cause this, or how to fix it? The CPU
> usage is never too high (about 50% each on two processors). Some
> latency issue, perhaps? It's a stock redhat kernel, which I think has
> the low-latency patch. xine-check doesn't complain about anything.

This might be a scheduling problem. But the many messages about sound 
card drift are quite suspicious, so it might also be your soundcard not 
keeping the sample clock precise enough. You could try switching 
"audio.av_sync_method" to "resample" to check rule that out.

Michael

-- 
/* Nobody will ever see this message :-) */
panic("Cannot initialize video hardware\n");
	2.0.38 /usr/src/linux/arch/m68k/atari/atafb.c