* This is an old post that I didn’t finish. I’m putting it up out of prosperity

I happen to have a lot of MKV files on my NAS. I’d like to stream them around my home without transcoding. Unfortunately the MKV container is not suited to streaming in my environment. I use a mixture of SMB and DLNA streaming. Some of my DLNA clients are pretty abysmal when it comes to container/codec support.

I’m lucky enough that the majority of my media has supported codecs so I’d like to just fix up the incompatabilities with the containers.

FFMPEG to the rescue!

Usage – (FIX ME)
ffmpeg -i cool-song.flv \ # Specify the input file
> -acodec copy \ # I want to copy the audio track
> -vcodec copy \ # I want to copy the video track too
> cool-song.mkv # specify the output filename and container

However I don’t want to be doing this by hand for hundreds of files so I’ll be using Window’s equivalent of Xargs which I would use on Unix.

So in this case I’ll be using forfiles (provide link)

To get help on forfiles specify
forfiles /?

forfiles /S /p D:Video /M r*.mkv /C “cmd /c ffmpeg -i @file -acodec copy -vcodec copy -y @fname.m4v -loglevel panic”

You could also look at keeping the ffmpeg output and redirecting it to a log (append for all copy between containers via)

(confirm the above)
forfiles /S /p D:Video /M r*.mkv /C “cmd /c ffmpeg -i @file -acodec copy -vcodec copy -y @fname.m4v 2>&1 | something >> log.txt

To show the current file converting , time started converting , convert it and delete the original mkv file you could use
forfiles /S /p D:Video /M *.mkv /C “cmd /c echo converting @file &
& time /t && ffmpeg -i @file -acodec copy -vcodec copy -y @fname.m4v -loglevel panic && del
@file”

Batch conversion of media containers using FFMpeg on Windows