View Full Version : Problem with 1-pass Quantizer mode


Acaila
2nd April 2002, 15:30
Hi,

This weekend I created a movie with normal 2-pass mode, and like all movies I've done so far I encoded the credits at constant quantizer of 31. This has worked great with previous versions, but with the one I used now (Nic's 27-03-02 version) I get a final output file that is approximately 26 MB oversized (repeatedly).
The DebugView output is normal until the credits begin, at which time it starts getting more and more negative until at the end of the movie I ended up with a huge (negative) overflow (which indeed means greater filesize right?). This tells me the credits don't get compressed like they should at 31 (or the codec didn't estimate the size of the rest of the movie correctly), and the codec doesn't compensate.

After seeing this I tried to repeat it by encoding the credits seperately with 1-pass constant quantizer mode (also at 31). The file again ended up oversized, total size of 28 MB, with previous versions I always ended up at around 10 MB.

I haven't tried it with the (Koepi's) new version yet, because I only just saw it was out and am at work atm, so I will test it when I get home.

I didn't use Foxer's Alt. CC btw.

OS: Win98SE


If you need any more info (part of the debug output?), just ask.

Btw, you are all doing a great job on this codec. It's been my favorite codec for quite some time already. Keep up the good work! :D

-h
2nd April 2002, 15:40
This weekend I created a movie with normal 2-pass mode, and like all movies I've done so far I encoded the credits at constant quantizer of 31. This has worked great with previous versions, but with the one I used now (Nic's 27-03-02 version) I get a final output file that is approximately 26 MB oversized (repeatedly).

Cool, I guess something broke it.

After seeing this I tried to repeat it by encoding the credits seperately with 1-pass constant quantizer mode (also at 31). The file again ended up oversized, total size of 28 MB, with previous versions I always ended up at around 10 MB.

The same clip ended up at 10 MB with previous builds? That's an odd one - I know constant quantizer mode is working fine at the moment.

I can't actually test any of this, since I'm off to bed. So this is a pretty useless reply :)

-h

Nic
2nd April 2002, 15:44
Best bet, is to try Koepi's current build, see if the same problem occurs. If so, please write back then as its an unfixed bug.

Cheers,
-Nic

Acaila
3rd April 2002, 08:10
I'm afraid it's gonna take some time before I get around to doing that.

Yesterday when I got home from work and started up my computer it gave a strange registry error and performed a roll-back with an older registry backup. It seems that backup was from a few months back, so the result was that half my programs weren't recognized anymore, and the some programs the computer thought were still installed, had long been deleted. :(

I had no choice but to format and reinstall, which I'll be doing for the next couple of days...

I figured this was a good moment to ditch Win98, so I've installed Win2k now.

I'll report back here after I've tested it with the newer builds.