Hello Steven, thanks for the mail > y4mscaler will of course convert to "420paldv" but I'm not sure that > the rest of the tool chain knows about '420paldv'. Feeding 420paldv > into mpeg2enc is probably not the right thing to do - I think mpeg2enc > wants 420mpeg2.
Well I tend to do the following to get the reels under Kino : (find . -name \*.pnm | xargs cat) | pnmtoy4m -F 25:1 | y4mdenoise -I 0 | \ y4mscaler -v 0 -I active=YYYxYYY+AA+BB -S option=cubic -O infer=exact -O size=720x576 -O chromass=444 | y4munsharp | y4mtoppm | ppm2raw -v 0 -a -2\ > ../reelXX.dv I found out that using the Edge Sense Bayer filter brings some anomalies as a kind of tartan pattern in (too) bright spots. The sinc:5 was ringing over it, so went for -S cubic in y4mscaler > ...terrible but I do think all that resampling/conversion will exact > a price on the quality. Sorry I don't get it... Don't forget that I denoise 1300*1100 ~ish frames before bringing them down to DV size. > Any particular reason you're converting to DV? That's a lossy process. Well, I have to do 2 things, swap images Lef to Right since I look directly into the projector gate, then I need to add extra frames for 25 fps. Most of the 8 mm are shot in 16.66 or 18 fps... I am using Fx in kino for that Then I edit, remove the burnt frames, a bit of cleaning and use the export tab under kino. It is just practical > > yuvdenoise -F -f | mpeg2enc -f 8 -4 2 -2 1 -r 16 -H -g 6 -G 15 -R 0 -D 10 > No -q and no --cbr means that -q is defaulted to 8 - and that can be > quite blocky (especially if -H is used which can raise the number of > bits needed). So you reckon I can boost it.. -q 6 is still blocky. Is it a linear scale ? > -H is probably not a good idea - the comment about that option makes > mention of high rate (and I don't think 7500 is considered "high") > I think you'd be much better off leaving out the -H and using > "-q 4". Well I'd like to go over 7500 but I'd rather stick to something that a dvdstandalone player will not spit out.. But I will give it a go > Another thing to try is using "--cbr" instead of "-q" - that will > produce a constant bitrate (default 7500) and vary the effective 'q' > as needed to maintain the bitrate. I thought --cbr was evil > Not using -q defaults to 8 unless you request constant bitrate. I think > it's going to be necessary to use -q ;) It mostly happens on dark ~ish scenes.... I tried to add a bit of gain, it is better, but not THAt better.. Or am i over exigeant / inflexible ... don't know, getting older only... Will try the options of --cbr or -q 4 without -H I'll post some feed back on that... Thanks again E ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
