my SVCD test

[dgcom]

I'd definetly agree with you. Yes, his code up the latest beta 19 is copyright-free. I hope also version 1.2 will have source code - he is including basic VBR encoding and this is great.

Regarding VirtualDub - I'd prefer to see it rewriten to be DirectShow based (the whole new project thou!). Then every body will benefit form this support of latest AVI formats (and AVI type 1 in particular). Then, you'd probably be able to connect other codecs to it more easely. Let's say Ligos GoMotion one, and "new bbMPEG.ax" (Oh! dreams)...

DGCom

[Walrus]

dgcom:
I have emailed him, and hopefully I will get some response as to the maintanence of the code. As for the copyright, the most likely reason there is no copyright is because he based his code on example code from official MPEG sources so copyright on those parts may be iffy, though I am curious as to how much of it could be put under the GPL if he decides to. (as the video filters I've been developing will be released under GPL, I'm a bit biased towards it or something simular)
As for DirectShow... as example code for Windows .AVI codecs is pretty easy to find, I think it may be easier just to implement some kind of front-end of bbMPEG as a AVI codec (ala dvmpeg). It allows any program that can output compressed avi streams (pretty much every existing windows based editing package) to output to bbMPEG.
Anyways, if there is a go-ahead given, luckily I own a license to the compiler he used.. (unfortunatly I have no real experience in writing MPEG encoders)

[BrianP]

FYI:

Again this is from Brent from another forum (pc_dvd):

"The pre12.zip file had problems (sure helps if you compile both the dll and exe with the same data alignment), try
http://members.home.net/beyeler/pre121.zip

instead."

[Walrus]

BrianP: Thank you for the information once again. BTW: Where is the PC_DVD forum?
Incidently, these previews of bbMPEG do seem to have some sort of max bitrate option. Not sure if they actually work, but at least they seem to work. I just encoded a short clip of Star Wars: A New Hope off of a laserdisc source into SVCD MPEG-2 and I don't think it exceeds 2.6 mbit/sec as I requested (with a quality of 12...)
As a note, the results were not that great with a quality level of 12 (then again the average bitrate at that point was in the VCD area). I'm experimenting with upping the quality level to 10 (and still keeping the cap of 2.6 mbit/sec)
I also attempted a full-resolution MPEG-2 transfer of the same clip at a quality level of 7, and was VERY impressed by the results. The image was a near perfect recreation of the MJPEG source. (bitrates were between 1mbit/sec and 6 mbit/sec with the average a shade over 3 mbit/sec)
Incidently, the source was interlaced and I played it back through my PC-DVD decoder outputting to my TV set.

[cjyo~]

http://www.delphi.com/pc_dvd/start/

The forum has a lot of useful research info on home-burning VCD, SVCD, MiniDVD and the holy grail: DVD on CD-R.