Audio out of sync, editing divx avi

[mitx]

Hi guys.

I am using video studio 10. I edit divx compressed avi files. I save the edited videos as avi, or mpegs. But the audio is always out of sync. How can I fix this annoying problem?

Thanks for reading

[Black Lab]

DivX files are highly compressed and are for viewing and not meant to be edited. You can try converting them to another, more editable format. Do a Google search for Super, a video converter.

[mitx]

there has to be a faster way to do it. that program takes forever to decode the divx video. I need to do lots of editing in a day and this will take me forever is there anything else you can think of?

[etech6355]

there has to be a faster way to do it. that program takes forever to decode the divx video. I need to do lots of editing in a day and this will take me forever is there anything else you can think of?

It depends on how good the original quality is of the video. Many are not worth converting to dvd format. Divx is so very highly compressed it falls in the non-editable format.
To properly edit any non-editable format you first convert the video into an editable format. But if the original video isn't very good quality then the conversion isn't worth the time.
The best codec to convert to is the DV (type1) avi container format. After conversion you start a new project, load the dv file, edit the file and produce a dvd compliant mpeg2 video file to burn to dvd.

If conversions result in audio sync problems on the computer then a solution is to playback the divx file using the divx player and output the analog video via the computers video card TV connector into a dv cam that has an analog input (or into another computer that can capture analog video).

You could also output the signal directly into a dvd recorder to create a dvd of the divx video.

[DVDDoug]

there has to be a faster way to do it...

Maybe there is. Check some of the DivX sites to see if there is a special-purpose DivX editor. (FYI - I don't mess-around with DivX, But I have an MPEG-2 capture device, and I use a special-purpose MPEG editor.)

Video editing is time-consuming anyway. If you are STUCK with a highly-compressed format, it's generally going to be more time-consuming and more frustrating.

None of the highly compressed formats were designed to be edited. This includes MPEG-2, the DVD format. However, in the real world, the more compressed formats (DivX, Xvid, MPEG-4, WMV, etc.) cause more headaches than MPEG-2, which is not quite as compressed. All of the editing is supposed to be done before compression. Compression is normally the last step in the process. (This is how commercial DVDs are done.)

Most "real editing" (everything except for cutting & splicing*) requires the video to be de-coded (de-compressed) and then re-coded (re-compressed). These are "lossy" compression techniques. (Data is thrown away during compression.) The 2nd lossy compression step means some additional loss of quality. The same is true when you convert from one lossy format to another. There is quality loss when converting DVD to DivX, and additional quality loss if you convert it back to DVD.... And, this frame-by-frame decoding/re-coding is very time consuming.

However, I don't fully understand what causes the "lip-sync" problems.


* If you splice-together two different files with non-identical formats, at least one of them will have to be re-coded to match the other.