MP4 Transcode

[mcflyy]

Hi all,

I searched the forum for the last 30 minutes but could not find any solution.
Music works just great. I have an issue with movies (all *.mp4 encoded).
The settings in transcoding for movies is:
ffmpeg -v 0 -ss %o -async 1 -i %s -f flv -b %bk -r 30 -s %wx%h -acodec copy -

However I always get this

2015-09-06 15_28_12-Subsonic.jpg

as an error message.
I am new to the move thing and don't know really where to start.

Any help is highly appreciated.

Thanks