Can't navigate video files after I split them with ffmpeg

[mkvbob]

I'm using ffmpeg to split a large file like this:

ffmpeg -i input.mkv -c copy -ss 00:35:40 -t 0:36:27 s2.wmv

When I then play the result, I'm however not able to step 10 seconds forward/back with the arrow keys in MPlayer. If I try to step back, it just gets stuck. VLC is however able to step back/forward properly.

Some navigational info must be missing in the stream, any idea what? Is it possible to fix this somehow?

[Selur]

have you tried '-demuxer asf' in mplayer? (might just be a problem with the libav wmv demuxer)

[mkvbob]

Do you mean muxer since it is wmv I'm muxing into?

The original source was 2 .avi files btw, which I merged with:

ffmpeg -f concat -i file.txt -c copy input.mkv

[Selur]

No, I ment '-demuxer' during playback with mplayer.

The original source was 2 .avi files btw, which I merged with:

normally I would recommend to use mkvmerge instead to join/append/split stuff to mkv,...

[mkvbob]

I'm trying to make the end result wmv, mkv was just a middle-step.

I see now that VLC is able to navigate it.