[linux-dvb] Re: DVD playback support for VDR-0.84

[Andreas Schultz <aschultz@warp10.net>]

Hi,

Jean-Claude REPETTO wrote:

[....]


>>
>>did it work with dvdplayer-0.5 or with my patched dvdplayer version?
>>
> 
> I have tested dvdplayer 0.5 vs 0.51 . The 0.51 works better than the 0.5,
> but there are the same problems than with vdr, even worse. The problem on
> the video disappears when there is no sound, and vice-versa. Perhaps the
> sound processing is time-consuming, and my Pentium 200 is not quick enough ?


That is very well possible. The AC3 generates about 25% CPU load on my 
AMD K6-III 450. I was already thinking about load problems with AC3. The 
big question here is, is the CPU really to slow or are we just to late 
with delivering the stream.

Can you have a look at the CPU load when replaying? I have some ideas 
how we could track this further, but i don't have the time to test those.

1. we would need a mechanism to detect underflows in the RingBuffer.
2. AC3 decoding should be done in a seperate thread, and not in the 
input thread, but: How do we synchronize the resulting audio and video 
stream then?

Andreas

> 
> 
>  Best regards,
> 
> Jean-Claude
> 
> 
> 
> 




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