RE: [Mjpeg-users] Re: [Mjpeg-developer] lavrec: Audio makes vide

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Hi Ralf,

On Mon, 2002-09-23 at 16:07, Ralf Oehler wrote:
> Other Problem: I connected my analog video camera to bt878 and displayed
> the picture through xawtv (grab, not overlay). Perfect.
> I recorded this with lavrec and gut a sort of mis-synced image. 
> Looked as if on an interlaced picture one half-picture is rolled 50 lines
> down while the other half-image is shifted 30 pixels left and 50 down.
> Looks ugly. Some timing-problem in the routine which reads the video
> buffers?

That's totally driver-related, lavrec/streamer don't know anything about
that. So I don't know, sorry. :-(.

> Since xawtv does it right, I tried it's "streamer"-tool. It records
> perfectly 384x288+mono16 to MJPG(80%).avi
> (But that's the limit, CPU is at 99% and moving the mouse causes
> frame-drops with my K6-III/450)
> 
> I installed v4l2 then and it reduced the frame-drops.

This makes me think, are you using BTTV-0.8? Then, you need to use the
latest CVS of lavrec, lavrec in mjpegtools-1.6.0 is known not to work
with BTTV-0.8 (it's using 3 device-access-threads, and the BTTV-0.8
driver uses semaphores in such a way that that won't work). lavrec in
CVS uses 2 device-access-threads, and that works well...

Hope this helps,

Ronald





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