The VideoLAN Forums

Hello,

I have an MP4 and 3GP file that I recorded using my phone.

I get no sound on the MP4 and 3GP files, where as quicktime plays them fine but I want it to work with VLC.

Also with the MP4 file, The video is stretched out on VLC. The aspect ratio setting was set to defualt but still is stretched out.

Example



As you see on Quicktime the video displays correctly, but not on VLC.

Thanks,
Kidcash.

My guess is that you mobile phone records AMR Audio which normal VLC doesn't support because of patent issues. Could you upload a sample file from your phone?

MPEG-4 - http://rapidshare.com/files/66922204/VI ... 6.mp4.html
3GP - http://rapidshare.com/files/66922367/VI ... 2.3gp.html

I used MediaInfo to get information about the audio, and it does indeed have AMR Audio, any way to make the audio play?

Do you have the aspect ratio problems with the MPEG-4 Sample as shown in my first post? Any Ideas for that?

Thanks,
Kidcash.

MPEG-4 Sample shows same issues in my VLC (picture is too Wide). VLC says that resolution is 240x320, but it doesn't play them like that. MPC plays it okay.

If you dumb the information from the moov box with "MP4Box -diso VIDEO_00066.mp4" you can see that the Width and Height in the TrackHeaderBox is set to 320x240 and in the MPEGVisualSampleDescriptionBox to 240x320. So I would say VLC displays the 3gp file correct, like he should, according to the information from the TrackHeaderBox.
You can correct this if you remux the file with MP4Box.

MP4Box -add VIDEO_00066.mp4 VIDEO_00066_remuxed.3gp

But maybe VLC should ignore the information in the TrackHeaderBox in the case of 3gp. In you sample file the MajorBrand is set to "3gp4", so it is a 3gp file and not a mp4 file. I guess different width and height value in the TrackHeaderBox and MPEGVisualSampleDescriptionBox are not allowed for this 3gp file format version. Maybe someone should take a look in the corresponding 3gpp standard.

Write a bugreport to your mobile phone manufacturer.

There have already been many improvents made to the nightly builds; possibly you might want to test one of them out to see if this problem has already been fixed.

I tried the latest nightly build and still no Audio on both files, and aspect ratio is still not fixed on the mpeg-4 file.

I face the exact same problem.. No audio in 3gp and mp4 files...
work on it VideoLan guys!!

Which VLC version you use?