VideoHelp Forum


Try DVDFab Video Downloader and rip Netflix video! Or Try DVDFab and copy Blu-rays! or rip iTunes movies!
+ Reply to Thread
Results 1 to 5 of 5
Thread
  1. Hi. I've just noticed that in MeGUI there's an option for the 'Extension' field. What difference does it make to the video being created if you choose M4A over MP4-AAC (and vice-versa)? Thank you.
    Image Attached Thumbnails Click image for larger version

Name:	qaac.jpg
Views:	234
Size:	48.0 KB
ID:	44500  

    Quote Quote  
  2. Dinosaur Supervisor KarMa's Avatar
    Join Date
    Jul 2015
    Location
    US
    Search Comp PM
    Should have no effect. But M4A is usually a container for audio only, but audio only MP4 containers play just fine and MP4/M4A are both closely related containers (if not just the same container just named differently). You are going to MUX this into a MKV or MP4 anyway I'm assuming and so matters even less.
    Quote Quote  
  3. Great, thanks for that. You assume correct!
    Quote Quote  
  4. KarMa is right - mp4 is extension usually used to signal that this is audio+video, m4a only for audio and m4v only for video - some dedicated audio players may refuse to play audio track if video is present in container - for example foobar2000 was this kind of audio player (for sure in past).
    Quote Quote  
  5. For the record, foobar2000 has played the audio in MP4 and MKV files containing video for a while, and it'll run a ReplayGain scan and use the result to losslessly adjust the volume of AAC audio in an MP4 even if it contains video.

    I haven't tested it for MP4 yet, but the latest beta now lets you choose which audio stream to play when there's more than one. It works fine for MKVs containing video and multiple audio streams.
    Quote Quote  



Similar Threads