Hi,
I hope someone can help me with my problem, because I'm really struggling.
I'm encoding a file using ffmpeg:
ffmpeg -i final.wmv -vcodec libx264 -acodec libfaac -ar 44100 -b 1000kb -ab 64kb -r 25 -level 30 -y finalNewVersion.mp4
and I have bumper that I encode the same way with the same width and height etc..
I then use MP4Box to concat the bumper to the file:
MP4Box bumper.mp4 -cat final.mp4 -out test.mp4

that works well when I use a new version of ffmpeg to encode both the bumper and the file.
but when I use an older version of ffmpeg to encode the file (because I have to on my mac using macports) and a new version of ffmpeg to encode the bumper.
I get the following:
No suitable destination track found - creating new one (type vide)

which is obviously not good

I don't understand what is the difference between the 2 files, they got the same width and height, bitrate, sar, par, etc...
here is a link to an encode with the old version of ffmpeg:
http://s197150304.onlinehome.fr/final.mp4
and here is a link of same encode but using a new version of ffmpeg:
http://s197150304.onlinehome.fr/finalNewVersion.mp4

I would appreciate if anybody could tell me what difference is between them which makes MP4Box not join the first one with the following file:
http://s197150304.onlinehome.fr/bumper.mp4

thanks