I have been capturing videos using Avermedia card and software and then using Avidemux 2.6.1 to edit and save them. I have set it to save as mp4. H264 constant bit rate Mp3 Audio. I have been using the files with a Plex Media Server and they will not play correctly. I immediately get an M3U8 error saving file not found. I have been told the is a transcoding error. The file playing time is being incorrectly displayed by Plex and DVDFab and probably other programs. It is showing many hours instead of 30 minutes. When I started using the program I did not know it was an experimental beta. I am going to try again with 2.5.1 and see if that helps. Plex is detecting the file as an AVI file. I am using the Windows 64 bit version on Windows 8 PRO X64.
try with a nightly, a lot of bugs have been fixed