Copies the video streams and the Hungarian DTS or AC3 audio streams to a new file using ffmpeg. The DLNA client of my WebOS LG TV doesn't support audio stream switching and picks audio streams randomly which isn't fun.

convert_dlna_ready_mkv

# Usage: find Harry.Potter.* -name *.mkv -exec convert_dlna_ready_mkv {} ";"

echo "Processing file: $1"

FFMPEG_INFO_FILE='ffmpeg-info'

OUTPUT_FILE=`echo "$1" | sed 's/\(.*\)\.mkv$/\1-lo.mkv/'`

ffmpeg -i "$1" 2>$FFMPEG_INFO_FILE

AUDIO_STREAM=`egrep "Stream #(\d:\d).*hun.*Audio: dts" $FFMPEG_INFO_FILE | sed 's/.*Stream #\([0-9]:[0-9]\).*/\1/'`
if [ -z $AUDIO_STREAM ]
then
	AUDIO_STREAM=`egrep "Stream #(\d:\d).*hun.*Audio: ac3" $FFMPEG_INFO_FILE | sed 's/.*Stream #\([0-9]:[0-9]\).*/\1/'`
	if [ -z $AUDIO_STREAM ]
	then
		echo 'Neither DTS nor AC3 hungarian audio stream found.'
	else 
		echo "AC3 hungarian audio stream found: $AUDIO_STREAM"
	fi
else
	echo "DTS hungarian audio stream found: $AUDIO_STREAM"
fi

VIDEO_STREAM=`egrep "Stream.*Video" $FFMPEG_INFO_FILE | sed 's/.*Stream #\([0-9]:[0-9]\).*/\1/'`
if [ -z $VIDEO_STREAM ]
then
	echo 'No video stream found.'
else 
	echo "Video stream found: $VIDEO_STREAM"
fi

if [ $AUDIO_STREAM -a $VIDEO_STREAM ]
then
	FFMPEG_COPY_CMD="ffmpeg -i \"$1\" -map $VIDEO_STREAM -map $AUDIO_STREAM -acodec copy -vcodec copy \"$OUTPUT_FILE\""
	echo "Executing command '$FFMPEG_COPY_CMD'"
	$FFMPEG_COPY_CMD
else
	echo "Nothing to execute."
fi

rm $FFMPEG_INFO_FILE