I have been having avery strange problem with some video streams when compiling a DVD with them.

I am compiling a DVD with something like 40 different "clips" that are captures from camcorder.

Using DVDLab 1.3 beta5 to make a DVD with several menus to access them.

Some of the clips (which were encoded to MPEG-2 with Tmpgenc), although accepted by DVDLab when importing them, cause a compilation failure for the project. Specifically, the project compiler raises an error that there was a serious error when muxing the file. After that, two critical exception errors occur (memory write violations) and compilation stops. The error occurs while DVDLab is muxing a particular clip.

I've identified the "offending" clips (3 in all). Tried to do a simple single movie DVD with one of them and it failed as well.

Re-encoded the clip with Mainconcept and it works, DVDLab accepts the clip both alone and in the large project and compiles succesfully.

Re-encoded the clip with Tmpgenc and it failed again!!.

I also re-encoded the audio, both with mainconcept and Tmpgenc and with the internal transcode option, but it appears the error has nothing to do with audio.

I must note that in both Mainconcept and Tmpgenc I use strict DVD spec parameters and even use closed GOPs. Also, the clips are 352x288 resolution. Also, all the other clips that are accepted by DVDLab were also encoded with Tmpgenc with the same settings. And also, all these "offending" clips were succesfully imported and compiled with Scenarist. And finaly, the offending clip, when re-encoded with Tmpgenc at 720x576, was accepted and succesfully compiled the project.

I believe the problem is that Tmpgenc creates a video stream that is not accepted by the mux engine in DVDLab. It happens with quarter resolution frame streams. The stream is not an illegal MPEG stream, or Scenarist would discard it. So, it appears that DVDLab doesn't like 352x288 streams produced by Tmpgenc, but not all of them

Has anyone had the same problem before? Any ideas on what might be causing the error? Any ideas on how to confirm that the mpeg streams are valid before trying to re-compile?