I tried the 'Native AAC' codec by simply using the following options:įfmpeg2 -i 'inputfile' -vcodec libx264 -profile:v baseline -level 3 -acodec aac 'outputfile' 2>&1' Further reading led me to find that 'libfaac' was no longer included with ffmpeg builds. I tried 'libfaac' as many online posts suggested, but this resulted in an 'unknown codec' error. I realized this means I have to force re-encoding of the audio stream, so I tried a few things but had no success with any. Since only some of the files didn't play audio while some did, this led me to believe that the audio track was being copied directly during the processing and if the original file didn't have audio supported by HTML5, then it output file would have the same result. I double-checked my ffmpeg command line and realized I didn't specify any audio options:įfmpeg2 -i 'inputfile' -vcodec libx264 -profile:v baseline -level 3 'outputfile' 2>&1' I've downloaded and checked the processed files and they both still have sound, so the issue seems to be related to the HTML5 player rather than loss of audio during processing. I have recently discovered that some videos that I upload do not play any sound when using the HTML5 player in Firefox/Chrome, but do have sound when using the fallback Flash player in IE.

After upload, they are converted to MP4 using ffmpeg and then ffmpeg2theora converts that to OGV. I have a media site where I can upload video files.

Ffmpeg remove audio stream mp4