joining mp4 files

[slgorin]

I have mp4 files that I am trying to join. I have tried yamb, which says the files are corrupt, but they play fine. They are h264 files. I have tried ultra video joiner, but I have audio sync issues with that. Any ideas on what to try next? Should I demux the files to another format and try to join them? I have not tried winff or super yet. I looked at avidemux and either it did not recognize the files or I could not figure out how to join them. These are HQ files that I got off the dailymotion website if that helps, captured with replay media catcher.

[Baldrick]

Could you open the mp4 in avidemux? Then use the file->append to add the rest of the files and last save as a new mp4.

[slgorin]

YOU are the MAN! It worked great! Looks like its in sync too. I will have to check others. So far its the only program that seemed to work. And all without re-encoding! Thank you so much!

[slgorin]

You're still the man, BUT.... The lip sync is way off on a second batch of files I have tried. I will have to experiment or append fewer files at a time and see if that makes any difference