On Tue, May 31, 2005 at 01:56:09PM -0700, john sturgeon wrote: > Re: audio sync: Welcome to my world. It's incredibly frustrating, and > only happens with 720p material. After transcode, my audio loses step > with video at about the rate of 850ms/hour of programming. Very > consistent, very repeatable. I have absolutely no solution. Sorry to > respond with a 'meee toooo' but I'd love to hear if somebody has an > answer. > > Re: transcode speed: What transcode paramaters are you using? Are you > resizing? I get very acceptable transcode speeds with 720p material > using ffmpeg (from transcode). I can't remember the fps off the top > of my head, but I think it's roughly 30fps.
I am not resizing, and doing everythign else to be as fast as possible, ie. no noise filter, no crop, no resize, no deint (of course). 4 to 5 fps for xvid (effectively unusuable unless I have 2 days to burn just to get out of sync audio) and about 20fps for divx (more tolerable.) I wasn't sure if the sync errors were gradual with time or caused by cutlist block removal. One way I could make this work is if I could get mpeg2cut to work on my 720p recordings. Then I could transocde the results myself with mencoder. Or so I think, I haven't yet tried things this large. Or I could encode without the cutlist as a test, but there are 76 minutes of material to cut, which is quite wasteful.
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