Incorrect aspect ratio in mp4 (H.264) generated by Samsung camcorder

Incorrect aspect ratio in mp4 (H.264) generated by Samsung camcorder

"I just bought a Samsung Camcorder (SMX-F30BP). It has the ability to capture in standard Aspect Ratio (I guess 4:3) or in 16:9 format. The problem is that the mp4 (H.264) file generated is always regarded as a 4:3 format in any player I tried (media player, MPlayer, VLC, etc.), despite the fact that the frames are actually 16:9. Only by manually setting the Aspect Ratio to 16:9 in the player, I get the movie right. Does someone has a clue on what is going on? Is it a bug in the cam software? Is there something I can do?
Thank you for your answers."

Asked by: Guest | Views: 241

Total answers/comments: 2

Comments display order:

Guest [Entry]

"There is simple way to correct spect ratio without re-encoding.

The Samsung MX20 does not tag its 16:9 files with the correct DAR. To fix this without a re-encode use Yamb (or mp4box), setting the aspect ratio to 64:45 for PAL videos.
As in this test video of a round spray can top shot from above. No other editing was done before uploading to YouTube.
Alternatively, install mp4box and use this batch file :

@ECHO OFF

:LOOP

""E:\Program Files\Yamb\mp4box.exe"" -par 1=64:45 %1

SHIFT

IF [%1]==[] GOTO END

GOTO LOOP

:END

Replace the path to mp4box as appropriate. Then just drag and drop files to be fixed onto the bat file.

Source: http://www.youtube.com/watch?v=rg4pc2rQ9Rw"

Guest [Entry]

"The MPEG4-Modifier does only work for DIVX encoded files. For H264-encoded videos you could try to use the H264 Apect Ratio Modifier (H264ARM) from this thread:

http://forum.videohelp.com/threads/316259-Can-I-change-the-pixel-aspect-ratio-in-an-x264-AVI-without-reencoding

It works without reencoding but patches the values in the h264-stream instead."