Re: Bug report: jerky playback of 1080i with vdpau and 8400gs
I believe this is an ffmpeg bug; I dumped the various VDPAU pictureInfo values, and found that the field_order_cnt and referenceFrames fields were completely mismatched with the correct values.
I don't understand why ffmpeg SW decoding doesn't show the artifacts. Perhaps ffmpeg internally detects the problems somehow, skips decoding corrupt data, and simply shows the previous frame content? Or, perhaps there's some bug in the way these fields are converted from ffmpeg data structures to VDPAU data structures (although there is basically no processing on these fields, and I can't see how such significant errors would appear for this one stream but not others).