On Monday 09 May 2005 22:55, Chris Kennedy wrote:
> This seems to depend upon something, I think it's whether or not the
> computer is very active with the CPU doing other things.  I have seen it
> really good during a playback and really horrible with the same exact
> playback.  It was just a cat /dev/video0 > /dev/video16 process when pretty
> good, but when running Myth (which really wouldn't have anything to do with
> Myth directly, just the CPU usage, from the vbi work queue), it was pretty
> bad at CC output. So really good compared to before, still some problems
> and probably missing buffers Hans has seen.

I see similar behaviour for my PVR250 recordings/playback using PAL system::
cat /dev/video0 >test.mpg contains all VBI embedded packets.
in mythtv, livetv recording/playback, I noticed missing VBI packets (slow 
teletext page updates and missing 888 subtitles). Analysis on bit-level of 
the recorded mpeg stream shows me that the embedded VBI packets are missing 
in the file, so its not the vbidecoder in mythtv.

Martin


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