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turbojet · 17th February 2012, 08:00

I'm using LAVF to serve avisynth for encoding but I'm noticing blocks with progressive VC-1 with a 9600GT (VP2) cuda enabled, here's a sample. All MPEG2 and AVC is fine and 99% of VC-1 is fine with cuda but always have at least a few blocky frames with every file. I've tried LAVF 0.45 and 0.46 with same results. I also tried nvidia drivers 285.62 and 270.61. Disabling cuda for VC-1 has no blocks but it's a ~30% slower encode. Playing the sample file in graphstudio or MPC-HC with LAVF there's no blocks, DGNV also has no blocks. Any idea what's going on?

Also encoded files decoded with LAVF are a little larger, sometimes significantly larger then files decoded with ffdshow, dgnv, microsoft. Is this dithering or something else? Is there any way to disable this?

17th February 2012, 08:00	#9144 \| Link
turbojet Registered User Join Date: May 2008 Posts: 1,840	I'm using LAVF to serve avisynth for encoding but I'm noticing blocks with progressive VC-1 with a 9600GT (VP2) cuda enabled, here's a sample. All MPEG2 and AVC is fine and 99% of VC-1 is fine with cuda but always have at least a few blocky frames with every file. I've tried LAVF 0.45 and 0.46 with same results. I also tried nvidia drivers 285.62 and 270.61. Disabling cuda for VC-1 has no blocks but it's a ~30% slower encode. Playing the sample file in graphstudio or MPC-HC with LAVF there's no blocks, DGNV also has no blocks. Any idea what's going on? Also encoded files decoded with LAVF are a little larger, sometimes significantly larger then files decoded with ffdshow, dgnv, microsoft. Is this dithering or something else? Is there any way to disable this?