xvideo -- XvShmPutImage -- "jerkiness" - while displaying multiple, successive images

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Folks,

I need some help. I'm using the Xvideo option to play video with vlc (www.videolan.org). The playback is shows some jerkiness.

I've taken xvinfo.c and hacked it up to display several images at 30 frames/second such that one sees a blue bar moving horizontally across the screen. One can chose a mode to display the images at normal 30 frames/second or one where 3:2 pull down is simulated (i.e one image is displayed for 33ms, the next for 42ms).

You'll notice that the playback is jerky in both modes, but in 3:2 pull down mode it is especially jerky. Would anyone know how to address this?

The goal is to somehow get mpeg2 video to playback in a non-jerky mode.

I'm using RH9, nvidia geforce2 with the nvidia drivers. Thanks!

Test code is attached.

Regards,

Howard G Page

Attachment: XV-MOTION-TEST.tarz
Description: Binary data


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