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Join and organize meetups on Mobilizonnot sure if wmv is a yuv format. anyway it gets decoded to a yuv format during playback. on the other hand i just did a short test with a .wmv in hd-resolution and videoout and videoout (yuvmixing) made no difference in cpu usage.
oh. just read your initial posting again. are you still using the onboard-graphic chip. that could be a reason…
recent nvidia and ati-cards have onboard decoding support for mpeg2 video. atis catalyst 5.13 will decode h.236 encoded video on your graphiccard and i think even .wmv is decoded on the gpu. for .mpg2 you need a special decoder that makes use of the cpu. not sure how this is with .wmv and h.236…
when videoout gives you only 10fps try setting the mainloop to 60forground fps that should do something similar as setting WaitForFrame=100 on the videotexture.
concerning a description of the renderers pins i wanted to link you to microsofts online dokumentation but their links are broken since days…