I have a several F4V that I've captured using Flash media Live Encoder and I need to convert them to MP4s. As I understand F4V are fairly identical to the MP4 format so we used "copy" for the video and audio codec.

This the the FFmpeg command line I used:

ffmpeg.exe -i %1 -vcodec copy -acodec copy -loglevel debug -report %1.mp4

The command seems to work except I'm using Bitrate Viewer as a quality check (http://www.winhoros.de/docs/bitrate-viewer/) and the resulting MP4s are displaying incorrect information (http://tinyurl.com/nafcozw). In contrast when I review the log from FFmpeg and use MediaInfo the results are accurate, when compared to the source file (F4V). Should I be concerned what Bitrate viewer is displaying or is there another program than I can use to graph the file bitrate?

Hope I made sense, I'm new to FFMPEG so you will have to excuse my lack of understanding. Thanks

  • bitrate = file size/duration, so you can perform your own calculations to compare. – llogan Dec 8 '14 at 23:13
  • If your file sizes are more or less identical- it should mean the rates have not changed. In any case, a codec copy means you are not re-encoding, so there should not be any difference. – Rajib Dec 9 '14 at 16:33

protected by Community May 2 at 10:38

Thank you for your interest in this question. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).

Would you like to answer one of these unanswered questions instead?

Browse other questions tagged or ask your own question.