reorder streams with ffmpeg issue

[MarquisdeOz]

Hi,

I've got a video file with
0.0 video
0.1 ger audio
0.2 eng audio

I want to change this to
0.0 video
0.1 eng audio
0.2 ger audio

I tried this:
"path\to\ffmpeg.exe" -vcodec copy -acodec copy -i in.avi out.avi -map 0.0 -map 0.2 -map 0.1 -newaudio

Now, in the output file, the order of streams is as desired, but the first audio stream (eng) is all messed up, the second (ger) works and the output file is 10 mb smaller then the input file.

What am I doing wrong?

Win7x64, Zeranoe FFmpeg git-58257ea 64-bit Static (Latest) (2011-07-08)

[Chris K]

Look at the FFmpeg log. Probably you'll see that the -newaudio stream is encoded instead of copied.

Try this ...

"path\to\ffmpeg.exe" -i in.avi -vcodec copy -acodec copy out.avi -acodec copy -newaudio -map 0.0 -map 0.2 -map 0.1

[MarquisdeOz]

Well, now the filesize is right but both audio streams are jumbled...

[Chris K]

I don't know which app made the source avi, but I think two audio streams in an AVI is uncommon. I guess FFmpeg can't do that properly.

Just to find out, you could try to mux it into mkv container and see if that works.

[MarquisdeOz]

Thanks for the tip - the app for the source avi is virtualdub.

But I don't care if it's avi, mkv or whatever.

So I tried this
"ffmpeg.exe" -i in.avi -vcodec copy -acodec copy out.mkv -acodec copy -newaudio -map 0.0 -map 0.2 -map 0.1
with this result:
[matroska @ 00000000002E15C0] Can't write packet with unknown timestamp
av_interleaved_write_frame(): Invalid argument

[MarquisdeOz]

I got it working now with mkvmerge:
mkvmerge.exe -o out.in --track-order 0:0,0:2,0:1 in.avi

[Chris K]

I got it working now with mkvmerge:
mkvmerge.exe -o out.in --track-order 0:0,0:2,0:1 in.avi

Even better!

[matroska @ 00000000002E15C0] Can't write packet with unknown timestamp

It would probably help with FFmpeg (to mkv) if you put -fflags genpts before the input command. That's the way I get rid of that message most of the time.