If I use VirtualDub2, the mp4 have the QuickTime/Mov container format, video 1440×768, with h264 video codec, 2.29 fps average, yuv420p (709) and the aac audio codec, stereo fltp, 33 kHz, 50 kb/sec bitrate. I also can convert the files with VirtualDub2 to mpg4 or Xvid minconverter to avi. The audio is in stereo s16p, 44.100 Hz, 1152 kb/sec bitrate. The WMV files have the ASF (Active Streaming Format) container format, video 1440×768, 25 fps wmv3 video codec, yuv420p, 1000 Kb/sec bitrate. I have several Webex sessions (each with 4 – 5 hours) in arf and wmv format (I export using cisco Network Recording Player application). I can edit an avi file (with 4:26 minutes and 914 Mb) but the edited avi is bigger (3:22 minutes and 2.3 Gb). Message shows when I try to save the edited file in VirtualDub2 (the original file was converted from wmv by VirtualDub2).

Pcm_f32le: codec not currently supported in container mp4

I have several long video files that I need to edit (remove some initial parts, breaks and dead moments) and I always got errors when I try to save / export the edited file in mp4.

Download virtualdub mp4