mpeg compression how?

[ps76]

Hello - I have an AVI file, that I have now converted to a mpeg1 file, in order to burn it on a cdrom (vcd) - only problem is, it is around 900 mb size, so I wonder, if it is possible to "shrink" it just a little bit, rather than having to cut it in two??
And how?
Thanks

[housepig]

reencode your avi to mpeg1, but turn the bitrate down on the mpeg1 encoder.

[ps76]

Nope - cannot. That is "greyed out", so I cannot choose any specific rate.
Otherwise I would have done that the first time I made the conversion.
Don`t know why it is not chooseable - perhaps You know?

[housepig]

check the guides on TMPGenc, in the Convert sections especially.

I think there's something in TMPGenc where if you want something that's not quite to spec (like a low bitrate), you have to "unlock" TMPGenc.

But I don't do Mpeg1 encoding, so I'm not 100% sure.

[Vejita-sama]

You want to make an xVCD there are several guides on how do this but basically:

1) Load your favorite template (eg. VCD)

2) Load your source files (DivX, avi, DV, etc)

3) Load the 'unlock' template (located in ../tmpgenc/templates/extras)

4) All of the greyed out sections are now unlocked and you can make changes as desired. Make sure that the final MPEG is set to 352x240, often times if unlocked the MPEG output resolution will be set the the same as the source (which is no good).

[Gazorgan]

Split it on 2 disks. VCD's are typically 2 disks, and SVCD's are 3-4 disks. You can't take a d/l 1 disk AVI and convert it to a 1 disk MPEG1/2 without breaking many rules. Quality....well....you don't get something for nothing, forget quality on a 1 disk mpeg1/2 from a 1 disk AVI.

[Echodek]

check the guides on TMPGenc, in the Convert sections especially.

I think there's something in TMPGenc where if you want something that's not quite to spec (like a low bitrate), you have to "unlock" TMPGenc.

But I don't do Mpeg1 encoding, so I'm not 100% sure.

housepig: I'm still a bit new at this and learning, but if you change it to a "low bitrate", is that going to affect the quality of the video that is output?

chris

[ZippyP.]

Lowering the bitrate will affect quality. If you go from 900 MB in file size down to 800 MB size then you will have to lower the bitrate by about 12% (100/900). That's not a huge amount and you might not notice. Here's a guide to fitting a movie on one CD: https://www.videohelp.com/forum/userguides/84759.php

The guide tells you how to unlock the settings in TMPGEnc and how to create your own templates. If you really want to lower file size while preserving quality then you should consider using VBR mode. Be aware that using VBR or a non-standard bitrate means you are creating what is known as an XVCD. XVCD's do not play in some VCD compatible DVD players.