Best Settings for long movies

[maormini]

Hi!

I have searced the forum up and down but I still did'nt find a thorough answer.

I am encoding 180-200 min video files, and I MUST get them on 1CD with the best quality possible. The video is of lectures so I believe that it is classed as mainly low motion, but at the beggining of the movie there is usually a 5min fast motion video clip. The Res I use is usually around 500.

The audio I am using is usually compressed to a 50-60MB Mono Mp3 file so that leaves me with 600MB for the video file (as I have more stuff on the CD.

Is there any pro here who is willing to help me and give me the best settings for such a project? (such as using Psych (fast slow or none), Qpel GMC B-Frames... all in DivX Pro 5.1.1)

I will really appreciate any help!

[scharfis_brain]

IMO true help isn't impossible, because we don't have your video to test on.

im most cases, filtering will help a lot (intelligent blurring, noise removal etc.)

ANd please, read the rules!
NO Crossposting!

[SeeMoreDigital]

Well it is possible.

A couple of years ago I encoded the PAL DVD version of Titanic (189min) to DivX. I used an image pixel frame size of 720x416. And made it fit onto a 702MB CD-R!

The audio was encoded in stereo at just 56kbps @ 24000Hz (76MB approx). Which left around 626MB for the video, which meant a 2pass VBR bitrate of 460kpbs could be used!

It was not the most perfect looking encode but it was not all that bad either!

If your lucky, you might have a CD burner that will let you burn to 800MB CD-R's. I have started using Philips CD-R90 (800MB) media... and very good it is too!

If you are able to burn to such media then you will be able to 'up' the video bitrate to 530kbps!

You could also consider using Mpeg1. Yes, I did say Mpeg1. If you pop along to www.KVCD.net there's plenty of info to show you how!

Cheers

[scharfis_brain]

I've did also such expermints, but 24kHz audio sounds a "little" bit strange....
(A Space Oddyssey, 2lang. Audio, 2x128kbps, VIdeo about 400kbps, 704x320)

maormini: maybe, you would give Realvideo9 a try. I handles lowmotion-video Extremely well. and the audiocompressing is also very good (64kbps gives already middle/good stereo/surround sound)

[JensG.]

If you think of VCD as quite watchable on TV, you should consider lowering the resolution to that of VCD. So a resolution of 352x288 PAL or 352x240 NTSC should be okay.
B-Frames are a must.
And remember that there are Cds with a capacitiy of 800 or even 870 MB!

[maormini]

Thanks guys for the replies.

I need some suggestions like if I should use Psych, and if so which one, or if I should use Qpel or GMC, stuff like that. (Keep in mind that this is a very low bitrate encode)
About 800MB CD's, I am restricted to using 700MB CD's for many reasons.

[DigitAl56K]

I would use 5.1.1Beta1, 2-Pass encoding, first pass in Standard, nth pass in Slowest, Source pre-processing at Normal, use of Psy is very dependant upon the source material - try both modes on a short sample and see what looks best, to avoid giving too many bits to the fast motion sequence at the start set the modulation control on the nth pass towards low motion (or else do 3-passes - standard, standard, slowest - and use the EKG between passes 2&3 on that section of video).

[SeeMoreDigital]

Originally posted by maormini
About 800MB CD's, I am restricted to using 700MB CD's for many reasons. Shame. I've found that the Philips brand works on every CD and DVD rom drive I've tried so far!

Cheers

EDIT: Even my 20 year old Philips CD101 player can spin them... amazing!

[FreakNGoat]

Originally posted by maormini
I need some suggestions like if I should use Psych, and if so which one, or if I should use Qpel or GMC, stuff like that. (Keep in mind that this is a very low bitrate encode)
About 800MB CD's, I am restricted to using 700MB CD's for many reasons.

I would not use GMC; this is only suppose to help with certain kinds of "steady" motion I believe. I would not use Qpel either at this resolution and bitrate.

As far as Psych, I actually like to use Psych on low motion video, simply because for high-motion video the effect is noticable to me and is annoying. For the small amount of motion there is in a low motion movie, I'm okay with Psych saving a few bits. However, there is some talk that Psych can actually increase the size in 5.1. I don't know if its true or not.

So, I'd use B-frames and probably some heavy filtering. It sounds like your source may be 4:3 interlaced NTSC, which is usually pretty hard to compress.

[hakko504]

Crosspost. (Which I unfortunately missed yesterday)

(Hint: How to avoid crossposts: Use the newbies forum (http://forum.doom9.org/forumdisplay.php?s=&forumid=6) )

Please continue the discussion here (http://forum.doom9.org/showthread.php?s=&threadid=64054).