[ivtv-devel] Change in yuv playback in 0.3.8 version

[John Harvey]

I have just commited my changes to svn for the yuv playback. The commit message was   Log: YUV playback now always defaults to interlaced. There are now 3 modes interlace,progressive & auto. There are 2 new ioctl's to set & get the mode & the threshold used for auto. There are 2 new options to ivtvctl to get & set the mode and threshold --set-yuv-mode & --get-yuv-mode. There are 2 new module load options to set the default values ivtv_yuv_mode & ivtv_yuv_threshold. The yuv playback code has been altered to cope with the mode being changed whilst in the moddle of playing back something.     The change here is that until now anything with a source height of 480 lines or less was treated as progressive video and the 350 was set up to play back like this. As long as it is being fed a progressive video stream this works well and doubles the frame rate which works well for xmame. However if it is being fed an interlaced video stream then it doesn’t display complete frames. This is I suspect what has been causing the comments about jumpy playback. With this commit the default changes to always being interlaced but the mode can be changed with either kernel load options or options to ivtvctl. It would make sense for instance to wrap xmame in a script that sets progressive mode at the start and restores interlaced mode on exit. To change back to the original settings you would either specify the module load options   ivtv_yuv_mode=2 ivtv_yuv_threshold=480   or after loading the module you could use ivtvctl   ivtvctl –set-yuv-mode=mode=2,threshold=480   Any problems let me know.   John