Xvid to Divx

[terminator]

hey guys,

you know that Xvid codec? well with it comes a AVIC (fourCC Changer). i tried to use it and you can load the avi into it and pick divx for the (four CC description code) and (FourCC used codec). i was wondering if this actually changes the file to a divx file. i have a few xvid movies but want them to be divx. what does CC stand for and is this the proper way to convert them to divx?

theres a guide here that uses that tool with virtual dub, but the final product is not in sync.

any thoughts or ideas?

thanks a lot

[Suntan]

Could you explain what you mean by...

i have a few xvid movies but want them to be divx.

Both Xvid and Divx are MPEG4 codecs. You can get pretty much the same thing from both depending on how you set up the encoding parameters.

Changing the Four Character Code only changes the header (tells the players what codecs to use to play back and such) to truely convert it to a "Divx Movie" you would have to re-encode.

-Suntan

[terminator]

hey suntan,,

thanks for the info, thing is, i want to encode the movies to vcd but i'm usually not that happy when i encode xvids to vcd (using vdub and tmpgenc). i want to re-encode the xvid to divx before encoding it to vcd. there is a guide to do this using virtual dub, but i'm having troubles with audio sync. the guide says to run the fourCC changer tool first and change the xvid to divx, then load it into vDub and choose Divx 5.11 as the video compression codec. i do this and get a Divx file out of it but the audio is not in sync. Meanwhile the original Xvid file now says Divx in the properties.

any thoughts

thanks

[Darth Paris]

Many of my XVID files also have sync problems in virtualdub. Try using goldwave. Open the video file and save to a .wav. Then you should import into virtualdub. (goldwave is a trial prohram, but you are allowed 3,000 commands so if you are just opening and saving files you shouldn't have a problem.)

[iantri]

thanks for the info, thing is, i want to encode the movies to vcd but i'm usually not that happy when i encode xvids to vcd (using vdub and tmpgenc). i want to re-encode the xvid to divx before encoding it to vcd.

Err.. uh.. you aren't going to make it any better by converting a lossy format to another lossy format before converting to an even lower quality lossy format. The quality can not be any better, at best, and will likely look far worse due to the extra recompression step.

Everything looks like crap in Video CD format. It is inherent in the format; it was designed when all that existed was CDs and MPEG-1.. it is seriously limited. DVD burners and media are cheap now -- buy one.

Sync problems are generally caused by variable bitrate (VBR) MP3 audio. VBR audio really does not work well at all due to the nature of the AVI format; seperate the audio in VirtualDub by selecting the Audio menu, then "Full processing mode", then "Compression" and "None". Then, select "File" and then "save wav".

When you encode the MPEG using Tmpgenc, specify the wav file you have created in the "Audio source" box.

Good luck,
iantri

[Suntan]

As iantri said, I can't see how you would get anything better by fooling around with a conversion to Divx then VCD. Could you point to the guide you are talking about that suggests converting an Xvid to Divx then VCD?

-Suntan

[terminator]

hey,

well there is no guide that says xvid to divx then to vcd, only xvid to divx.
when i try to encode a xvid with tmpgenc, most of the time the audio is a little out of sync. i actually created the divx with vdub with the audio from the wav source and it worked quite nicely. i encoded that new avi and it turned out great, i couldn't notice any quality loss, i encoded the xvid and compared pictures.


thanks.

[iantri]

There is no relation between the audio and the video in an AVI except for the fact that it is interleaved together.

Xvid and divx are both video codecs that work in the AVI container format.

Perhaps when you re-encoded it, you did something to the audio as well (perhaps being multiplexed into the new AVI fixed it) that brought it back into sync.

If the guide says "Divx to VCD" (I'm assuming that is what you meant, since a guide for "XVID to DIVX" would be just plain stupid), it doesn't really matter if it is Divx, Xvid or something else -- it uses the AVI container, and the only difference between them is whether or not you have the appropriate codecs installed.