[linux-dvb] Re: VDR 0.80pre8

[Ralph Metzler <rjkm@convergence.de>]

Matthias Weingart writes:
 > > These will be fixed in the next version.
 > > Some channels really seem to have a big offset between audio and
 > > video and if the video buffer is too small, the audio for the video
 > > data at the buffer exit sometimes has not arrived yet -> audio underflow.
 > > This works fine during normal TV watching since the
 > > hardware/firmware ROM can use the overflow buffer in DRAM.
 > > During playback I cannot (don't know how to) do this and thus need 
 > > more of the original video buffer space.
 > > 
 > > This will probably be bad for VDR because there is now about 30KB less
 > > OSD memory and I don't know yet if I need more. 
 > > I checked for audio buffer underflows in a longer recording of ZDF
 > > during this "music awards thing" (lots of motion and sound) and 
 > > adjusted the buffer until the dropouts went away. If they still occur
 > > I will have to reclaim more memory.
 > 
 > A remuxing of the recorded stream (to have small audio/video delay)
 > should solve the problem too? I think the problem should be cured with
 > remuxing instead making the OSD unusable :-/

Yes, remuxing should solve this too but it puts a heavy load on the 
application in favour of a little OSD.
(On the other hand, why didn't Technotrend/Hauppauge add some
OSD memory on the new card design?)


Ralph


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