MJPEG to XVID

[gyeshu]

Hi
I'm trying to convert my Canon A700 MJPEG clips to XVID or DiVX. I have used VirtualDub, Dr.DIVX, and XVID converter.
While the converted clips are playing OK on my PC, they "stutter" when playbacked on a DVD player. the video is not continous, rather like seperate images, and the audio "squeaks".
Any suggestions ?
Thanks !
gyeshu

[Baldrick]

what is the source framerate and to what framerate are you converting to? dvd players prefers 24,25,29.97fps.

[gyeshu]

It is not a problem of framerate - it is 30 fps, both source and destination.
After further investigation I think it is only a matter of having the right CODECS, and "playing" with the conversion parameters. I read in another forum that that using "Lame MP3" codec (whatever that means) will do the trick for the audio, and it did. And after playing with the bitrate, number of passes and applying filters I got better results, but not yet satisfying. However, I believe I'm on the right track
ThanX

[BlinK_]

@gyeshu, I have the same camera and I want to convert my clips to xvid too. Could you post me the settings you have used and the results you have got. And I think I must email you.. (:

[jagabo]

Forget Xvid bitrate and use target quantizer encoding. Pick the quantizer (quality) you want and encode in a single pass. No guesswork.

[BlinK_]

Yea, i tried that and i got 3:1 compress ratio at most. But when i tried one of the tuts with twopass compression i got 10:1 ratio with the same quality...

[jagabo]

How much compression you get depends on what quality you select.

In every test I've ever done single pass target quantizer mode and 2-pass VBR give the same quality with the same file size (same average bitrate).

The difference between the two approaches: with single pass target quantizer mode you know what the quality will be but you don't know the file size. with 2-pass VBR you know what the file size will be but you don't know the quality.

[TBoneit]

It is not a problem of framerate - it is 30 fps, both source and destination.
After further investigation I think it is only a matter of having the right CODECS, and "playing" with the conversion parameters. I read in another forum that that using "Lame MP3" codec (whatever that means) will do the trick for the audio, and it did. And after playing with the bitrate, number of passes and applying filters I got better results, but not yet satisfying. However, I believe I'm on the right track
ThanX

Keeping in mind that 30fps is not a legal frame rate for DVD video......

As Baldrick says "24,25,29.97fps"

the first and the last are proper for NTSC video and the middle, 25fps, is right for PAL. Anything else is off DVD specifications. So theory says that your camera should not be outputting 30fps.

Why not try the New Divx Author 1.0 30 day Trial? I just tried a test run yesterday and it converted Mpegs from a DVD flawlessly.

https://forum.videohelp.com/viewtopic.php?t=319996&highlight=

The watermarking since it is a trial is not obtrusive. The chaptering and menu worked. It turned out a Divx file that worked just like a DVD with chapters and a menu for each title I added. Keeping in mind it does need a Ultra Divx player for those to work. I had looked at other options to produce ultra divx and said not ready for my purposes yet. This one worked just like the TMPGEnc DVD author application except for Divx and the fact that it did the encoding too.

[jagabo]

From what I've seen 30 fps is not unusual for a still camera.

Most software and set-top Divx/DVD players are very tolerant of unusual frame rates when playing Divx files. With 30 fps rather than 29.97 fps the video will probably just have a small jerk every ~30 seconds (as one frame is duplicate to create 29.97 fps out of 30 fps).