maemo.org - Talk - Problems Using FFMPEG to Convert Video

I'm having trouble using ffmpeg to convert video so that it'll be playable on the n800.

The test video I'm using was originally encoded by Quicktime 7 as a MP4 file using MPEG-4 Video and AAC

Code:

$ file input.mp4 

input.mp4: ISO Media, MPEG v4 system, version 2



Header:

....ftypmp42....

mp42mp41....moov

...lmvhd.....*..

When I encode it to a resolution that will work with the n800s media player using Quicktime 7, the file plays just fine

Code:

File:

$ file qt-attempt.mp4 

qt-attempt.mp4: ISO Media, MPEG v4 system, version 2

Header:

....ftypmp42....

mp42mp41..'*moov

...lmvhd......9.

But when I try to encode it using ffmpeg, using these options

Code:

/usr/local/bin/ffmpeg -i input.mp4 -b 512 -padleft 40 -padright 40 -padtop 32 -padbottom 32 -vcodec mpeg4 -ab 128 -acodec aac  attempt4.mp4

The file does not work in media player

Code:

File:

$ file attempt.mp4 

attempt.mp4: ISO Media, MPEG v4 system, version 1

Header:

....ftypisom....

mp41....wide..1O

mdat............

As you can see, the file header is different. Quicktime uses a different header - and that works on the n800. But ffmpeg's header is different so Media Player fails.

So how do I get ffmpeg to make files that will work on the n800?