Some more tests: what I wrote before is true only if ffdshow is used for mpeg2 decoding only.
If I have ffdshow(mpeg2)+ffdshow(uncompressed) or dscaler+ffdshow(uncompressed) I have this problem with VMR7 and VMR9, no matter if I check or uncheck YUV mixing mode and if I reconnect all the filters. No problems at all with MPV decoder also connecting it to ffdshow uncompressed.
Would you like me to upload one of the small mpeg2 captures I'm using for these tests? Maybe it could be of help...
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