flask mpg too large...why me?

[smokehead]

i have not seen this post yet...
when i use flask mpeg, and try to choose a low bitrate so i could fit an entire movie onto a 700mm cd, flask ends up adding like 100 to 200 MBs onto the resulting mpg. yet, if i were to de-mux the file with tmpg, the vid and audio files are the exact size that i had calculated out. then if i mux those two, tmpg says there's sync errors, file might play bad...blah blah.
okay to clarify the above a little bit, this what i've been trying to do: I've got happy gilmore ripped to the hd. it's an 88 minute movie, so i calculated that i could afford a constant bit rate of about 1000kbps for vid + audio.
in flask, i use the bbmpg encoder, and in that thing, i set the constant bitrate as 900000, with 64bps for the audio - a total of 964kbps, which should be fine: 964*60*88/8000 = 636MB. but guess what, the file ends up being over 800MBs. WTF is happening here? any suggestions out there?

[vitualis]

I'm not entirely sure what you've done wrong, but here's a few pointers.

1. The VCD bitrates are fixed at 1150 kbit/s for video and 224 kbit/s for audio. Anything else is XVCD (i.e., non-standard).

2. 64 kbit/s for MPEG-1 Layer 2 audio (which is what VCDs use) is LOW, LOW, LOW. Your audio quality will be quite poor. If you are going to make XVCDs, I suggest that you at least use 128 kbit/s and up.

3. 700MB/80min CDs can fit 80min or about 800MB of MPEG video on a disc. VCDs burn in MODE2 Form2 and the apparent increase in capacity is due to the fact that additional error correction codes (which are used for ordinary CD-ROMs) are used.

Regards.

[smokehead]

oh let me clarify one other thing, i'm not trying to make a vcd out of this thing... i just wanted to be able to play a decent mpg on my computer. otherwise, i would use the normal vcd bitrates.

also, i don't really mess with any of the bbmpeg settings; i click "use floating point," mux audio, mux video, i click "mpeg 1", i set cbr as 900000, and i set audio as layer 2, 64kbps, i set fps to 29.97. and in the global settings for flask, i set "hq bicubic ...", 29.97fps, decode audio to 44khz. so other than this stuff, i don't mess with the other settings in bbmpeg, as i don't know what they are anyways. vitualis, or anyone, got any ideas here? thanx in advance...

[smokehead]

anyone? bueller, bueller?