Vhs avicap to really high CBR bitrate, and then reencode multipass to save time?

[shock]

I intend to slap a 3 hour 720x480i vhs capture onto dvdr (downsizing to 352x480i in the process, pure ntsc content). This capture is almost nothing but heavy motion scenes and will probably need like 4 or more passes to come out looking good. The thing is my cpu is a mere 1400mhz and it would take days to encode the heavily filtered input using 4 pass vbr. So i was wondering if it would be a good idea to filter and encode to say 9800 CBR, and then reencode the CBR m2v unfiltered using multipass? It would save a TON of time but im not sure if it would degrade the quality by much or not. Has anyone done this? Thanks!

[auenf]

capture to an avi, then compress to m2v from that.

even at 9800 CBR, a very dirty and very motioned clip would macroblock.

Enf...

[shock]

That is what it is, an avi capture (a 110gig one at that). If i were to filter and encode through cce at 9800cbr, and then reencode the 9800cbr encode to say 5x multipass and unfiltered it would save like 24 hours and still get the number of passes it needs, but im not sure if encoding it twice would cause it to degrade or anything.

[Zhnujm]

If you want to make sure that theres no quality loss AND want to save the time for the filtering you can create a (filtered) lossless huffyuv avi file and then encode with cce.
Well, if you have the harddisk space...

[shock]

Not hardly, the original is allready 110gigs and thas using picvideo (manual quality-luma=2, chroma=2). I did a little test an hour ago and there is a very small amount of blurring on the 2nd encode but hardly noticable. The 2nd encode ran at 1.75 speed, thats alot better then 0.185 id say :), and there is no blocks to be found anywhere. I have yet to see how it looks on my tv though.

[E-Male]

i´m trying somethign similar atm (just noone replyed to my thread)
i´m testing settíngs atm ti make the high bitrate mpeg2 look as good as possible

[shock]

Originally posted by E-Male
i´m trying somethign similar atm (just noone replyed to my thread)
i´m testing settíngs atm ti make the high bitrate mpeg2 look as good as possible

I captured it to AVI with picvideo compression (set on high, halfway between 19 and 20 using manual settings), but instead of encoding it stright to multipass vbr I used 9800 cbr instead with image quality set to 40 in cce. And then reencoded that to 0/3000/6000 4pass vbr with image quality set to 25. I was amazed to see that the degredation was very small, and it took 3x less the time it would have the other way. It takes eons encoding it straight to 4pass vbr using cnr2, convolution3d, lanczosresize (downsize to 352), a couple of other filters and also seperating the fields and weaving them back together before and after with only 1400mhz. I just wanted to hear what the pros say about doing it that way. If i had one of those new 300gigers i would do it the way Zhnujm mentioned, but I ONLY have 150gigs :(

[madluther]

Why 9800 ? If you're after maximum quality, CCE supports a max bitrate of 15000.

[E-Male]

9800 is the max of dvd standart
maybe he wants to burn the temp file to dvd

[madluther]

Perhaps, but 3 hrs @ 9800 is around 12 gig, A lot more manageable than 110 gig but too large for any dvd-r I've ever seen :)

[shock]

It is only 352x480 interlaced, so it doesnt need TOO much bitrate. Its just a temp file, i just reencode it to multipass anyway. I suppose i could make it 15000 but it would probably be pointless since its been downsized to 352x480 anyway and cleaned up a bit. Doing it this way with LONG vhs captures that need lots of filtering seems to be more practical then running it though endless passes of filtering raw avi, plus when its allready compressed to m2v it encodes much faster then raw avi. With high quality sources its probably not the best thing to do but with vhs I cant tell any difference.