thx
what colorspace is outputted in qt7 itself by default?
eg mpeg-4 and h.264 streams are always YV12, so it would be interesting to know if qt7 does a colorspace conversion during playback and if thats avoidable with your plugin
i made a quick test on a h.264 sample with quality = 0 and 100 and it seems to output exactly the same picture
Quote:
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Originally Posted by tateu
I haven't done any speed tests. Are you looking for speed compared to mencoder/ffmpeg quicktime decoding or to compared to avi vfw decoding?
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yes, till now there exists no way to test the max decoding speed a decoder in qt can achieve afaik
for getting an idea on how fast/slow your plugin is i now did the following:
i played an .avi with uncompressed YUY2 video (~3gb) via .avs and your qtinput() in directshow (so its decoded in qt7) and measured the decoding speed
than i played the same .avi directly in directshow without avs and your plugin
the result was:
qtinput: 22.63fps
normal: 39.94fps
so when going via your plugin it was played slower than realtime (the file has 25fps)
i noticed that at the beginning it played at normal speed, after seeking eg to the middle of the file i saw that things were slower (this is not the same in qt7)
i dunno if thats a bug in your plugin or maybe caused somehow by the big filesize or if your plugin is simply slower?