I am struggling and hope someone can help me. I would need 1 of 2 solutions and I would be very grateful! So I use a screencast.sh script I found online which works awesome EXCEPT my headset/mic (Turtle Beach X31's) I use is for an xbox 360. I am using an adapter from 3/32 to 1/8 into my mic jack, the adapter I bought says it's a stereo adapter BUT only the LEFT channel audio is recorded (maybe something due to the headset?). I am not buying a better mic and I am sticking with this headset/mic SO, 1 of 2 things needs to occur.

1. Somehow understand how to tell the script (pasted below) to only record in mono or end up rendering it in mono. I have played with the sox options and have failed miserably. I also tried to play with the final FFMPEG command by adding -ac 1 BUT again FAIL. Not sure how to fix it here.

IF the above can't be achieved how to do this

2. Somehow save the H264 profile within kdenlive and make a new 1 with "mono" appended to name and make it such that it takes what it thinks is the stereo audio and converts it to mono. Can anyone help please??

As a side not I can open audacity and tell it capture mono and it works great, my audio is then captured in mono and when played back obviously goes to both left and right channels of my speakers.

Here's the screencast.sh script which I am using:
#!/bin/bash

# list of programs we depend on
progs="xdpyinfo grep head sed ffmpeg pacat parec sox"

# check for programs we depend on
result=0
for prog in $progs
do
type -p $prog > /dev/null
if (( $? != 0 )); then
echo "Error: Cannot find required program '$prog'"
result=1
fi
done
if (( $result != 0 )); then
exit 1
fi

screenSize="1280x1024" # default if we cant detect it
screenOffset="0,0" # default to top-left corner
frameRate="24" # default frame rate
baseName="capture" # default base filename for capture

# attempt to detect the dimension of the screen for the default
dimensions=`xdpyinfo | grep 'dimensions:' | head -1 | \
sed -e 's/^.* \([0-9]\+x[0-9]\+\) pixels.*$/\1/'`
if [[ "$dimensions" =~ [0-9]+x[0-9]+ ]]; then
screenSize=$dimensions
fi

# collect command line settings
while getopts 'hs:o:t:p' param ; do
case $param in
s)
screenSize="$OPTARG"
;;
o)
screenOffset="$OPTARG"
;;
t)
timeToRecord="$OPTARG"
;;
*)
echo ""
echo "$0 - records screencast"
echo ""
echo "$0 [options] [base-filename]"
echo ""
echo "options:"
echo " -h show brief help"
echo " -s screensize to record as x"
echo " -o offset off recording area as ,"
echo " -t time to record (in seconds)"
echo ""
exit 0
;;
esac
done

shift $(( $OPTIND - 1 ))

# determine basename of files
if [ -n "$1" ] ; then
baseName="$1"
fi

echo ""
echo "Size = $screenSize"
echo "Offset = $screenOffset"
echo "Rate = $frameRate"
echo "Filename = $baseName"

# get ready to start recording
echo ""
if [ -n "$timeToRecord" ]; then
echo "Preparing to capture for $timeToRecord seconds."
else
echo "Preparing to capture."
echo "Press ENTER when finished capturing."
fi
sleep 3
echo ""

# start playing silence to make sure there is always audio flowing
pacat /dev/zero &
pidSilence=$!

# starts recording video using x11grab to make mpeg2video
ffmpeg -y -an \
-s "$screenSize" -r "$frameRate" -f x11grab -i :0.0+"$screenOffset" \
-s "$screenSize" -r "$frameRate" -aspect 4:3 -vcodec mpeg2video -sameq \
-f mpeg2video "$baseName.mpeg" &
pidVideo=$!

# starts recording raw audio
parec --format=s16le --rate=44100 --channels=2 $baseName.raw &
pidAudio=$!

echo ""
echo "Video recording started with process ID $pidVideo"
echo "Audio recording started with process ID $pidAudio"
echo ""

# wait for recording to be done, either by timer or user hitting enter
if [ -n "$timeToRecord" ]; then
sleep "$timeToRecord"
else
read nothing
fi

# stop recordings
echo ""
echo "Terminating recordings ..."
kill -15 $pidVideo $pidAudio
kill -15 $pidSilence
wait

# filter and normalize the audio
echo ""
echo "Filtering and normalizing sound ..."
sox --norm -s -b 16 -L -r 44100 -c 2 "$baseName.raw" "$baseName.wav" highpass 65 lowpass 12k

# encode video and audio into avi file
echo ""
echo "Encoding to final avi ..."
ffmpeg -isync -i "$baseName.wav" -i "$baseName.mpeg" -acodec mp2 -ab 192k -vcodec copy "$baseName.avi"

# convert to ogg - to turn on uncomment next three lines
#echo""
#echo "convert to theora"
#ffmpeg2theora "$baseName.avi" -o "$baseName.ogv"

# convert avi to flv - to turn on uncomment next three lines
#echo""
#echo "convert to theora"
# ffmpeg -i "$baseNamee.avi" -ab 56 -ar 44100 -b 200 -r 15 -s 320x240 -f flv "$baseNamee.flv"

echo ""
echo "DONE! Final media written in file $baseName.avi"

echo ""
exit 0

bump. anyone please?

Are you saying you want your left channel out of both? The Stereo to Mono audio channel effect would do this I think, it just copies the channel.

It would be very nice if the "split audio" tool would have a "separate channels into mono tracks" option.
That is, instead of generating one stereo audio track, generate two mono tracks. (Or more, if the input video is 5.1 or whatever)

Another solution would be to have a separate audio-only tool (not a part of "split audio"), which would convert an multichannel audio track into separate mono audio tracks.

I encountered two cases, where I needed to do this, and had to use an external tool. First, when one of the stereo channels was junk, and second, when a recording from a TV was bilingual.

It was not possible, within Kdenlive, to produce an output video with stereo sound, where the desired audio channel from the input would be heard in both chanels of the output video. (There were additional audio sources like background music, therefore the need for stereo output.)

Change

parec --format=s16le --rate=44100 --channels=2 $baseName.raw &

to

parec --format=s16le --rate=44100 --channels=1 $baseName.raw &


and also change

sox --norm -s -b 16 -L -r 44100 -c 2 "$baseName.raw" "$baseName.wav" highpass 65 lowpass 12k

to

sox --norm -s -b 16 -L -r 44100 -c 1 "$baseName.raw" "$baseName.wav" highpass 65 lowpass 12k

you guys are awesome, thank you!!!! Will report back when I test this. Thanks again. BTW, loving kdenlive which I am using from sunab's svn PPA within Ubuntu 10.04.

Under effects > audio correction > copy channels and also mono to stereo both do the same thing and either works a treat. THANKS