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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I cannot get this script to work. There must be a line feed
somewhere in my copy that shouldn’t be.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Chris, can you email it to me as an attachment?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Marc<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
mythtv-users-bounces@mythtv.org [mailto:mythtv-users-bounces@mythtv.org] <b>On
Behalf Of </b>Chris Isip<br>
<b>Sent:</b> Monday, February 18, 2008 9:30 PM<br>
<b>To:</b> Discussion about mythtv<br>
<b>Subject:</b> [mythtv-users] Encoding to h264 to save space<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>I am able to shrink 1 hour of
video to approximately 150 MB at 200 kbit with ffmpeg using h264. Seems
to work well except with seeking. I wonder if this is a keyframe
issue. When I forward or rewind, there is distortion for a few seconds
and then the video fixes itself. If I forward or rewind before the video
is fixed, the progress bar seems to jump back. Seeking is more reliable
when the distrotion is allowed to clear first. Also, I cannot jump to the
very first frame of the recording. If I exit the recording and play it
again, I start on the first frame. Here is a copy of my latest
script. Single pass for now (hoping to go to 2 pass). I was
wondering if anyone could give me any ideas as to how to fix this issue. <br>
<br>
Thanks<br>
Chris<br>
<br>
<br>
#!/bin/bash<br>
VIDEO_DIR=/mnt/VIDEO<br>
<br>
#subq to 7 trellis to 2 threads 2<br>
#need to clear the cutlist and generate it again<br>
<br>
<br>
<br>
<br>
function convert-to-h264 ()<br>
{<br>
#argument is file only (no path)<br>
#need to dereference a symlink<br>
inputfile=`ls -ld $VIDEO_DIR/$1 | awk -F" " '{ print $NF }'`<br>
<br>
echo "Will encode $inputfile"<br>
basedname=`echo $inputfile | sed 's,^\(.*/\)\?\([^/]*\),\2,'`<br>
vidformat=`mplayer -vo null -ao null -frames 0 -identify "$inputfile"
2>/dev/null | grep "ID_VIDEO_FORMAT" | sed -e
's/ID_VIDEO_FORMAT=//'`<br>
<br>
<br>
<br>
if ! [ "$vidformat" == "H264" ]; then<br>
/usr/bin/ffmpeg -threads 2 -i $inputfile -acodec mp3 -ac 2 -ar
44100 -ab 128k -s 320x240 -vcodec h264 -sameq -flags +loop -cmp +chroma
-partitions +parti4x4+partp8x8+partb8x8 -me umh -subq 7 -trellis 2 -refs 1
-coder 0 -me_range 16 -g 300 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71
-bt 300k -maxrate 300k -bufsize 300k -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6
-qmin 15 -qmax 51 -qdiff 4 -level 30 -aspect 320:240 $inputfile.avi<br>
<br>
<br>
mv $inputfile $inputfile.old<br>
mv $inputfile.avi $inputfile<br>
<br>
<br>
echo "Building seek table"<br>
mythcommflag --rebuild -f "$inputfile"<br>
<br>
echo "Clearing the cut list"<br>
mythcommflag --clearcutlist -f $inputfile<br>
<br>
echo "Commercial skip to cutlist"<br>
mythcommflag --gencutlist -f $inputfile<br>
<br>
filesize=$(wc -c $inputfile | awk '{print $1}')<br>
echo "Updating database"<br>
mysql -umythtv -pmythtv -hmymythtv mythconverg -se"UPDATE recorded SET
cutlist=0,filesize=$filesize WHERE basename=\"$basedname\";"<br>
else<br>
echo "Already an H264"<br>
<br>
fi<br>
}<br>
<br>
<br>
CONVLIST=`mysql -umythtv -pmythtv -hmymythtv mythconverg -se"select
basename from recorded where title like \"%$1%\";"`<br>
<br>
for i in ${CONVLIST[@]} ; do<br>
if ! test -L $VIDEO_DIR/$i ; then #its not a symnlink<br>
#Check if this recording is done -mmin +5<br>
filetoconvert=`find $VIDEO_DIR -name $i -mmin +5 | sed
's,^\(.*/\)\?\([^/]*\),\2,'`<br>
if [ -z "$filetoconvert" ]; then<br>
echo "$i is not finnished
recording...Skipping"<br>
else<br>
echo "Moving $i to
/mnt/VIDEO1"<br>
mv $VIDEO_DIR/$i /mnt/VIDEO1<br>
ln -sf /mnt/VIDEO1/$i $VIDEO_DIR/$i<br>
convert-to-h264 $i<br>
fi<br>
else<br>
echo "$i is already a symlink...Skipping"<br>
convert-to-h264 $i<br>
fi<br>
<br>
<br>
<br>
<br>
done<br>
[root@mygamepc cmisip]# cat /usr/local/bin/RECconv2.sh<br>
#!/bin/bash<br>
VIDEO_DIR=/mnt/VIDEO<br>
<br>
#subq to 7 trellis to 2 threads 2<br>
#need to clear the cutlist and generate it again<br>
<br>
<br>
<br>
<br>
function convert-to-h264 ()<br>
{<br>
#argument is file only (no path)<br>
#need to dereference a symlink<br>
inputfile=`ls -ld $VIDEO_DIR/$1 | awk -F" " '{ print $NF }'`<br>
<br>
echo "Will encode $inputfile"<br>
basedname=`echo $inputfile | sed 's,^\(.*/\)\?\([^/]*\),\2,'`<br>
vidformat=`mplayer -vo null -ao null -frames 0 -identify "$inputfile"
2>/dev/null | grep "ID_VIDEO_FORMAT" | sed -e
's/ID_VIDEO_FORMAT=//'`<br>
<br>
<br>
<br>
if ! [ "$vidformat" == "H264" ]; then<br>
/usr/bin/ffmpeg -threads 2 -i $inputfile -acodec mp3 -ac 2 -ar
44100 -ab 128k -s 320x240 -vcodec h264 -sameq -flags +loop -cmp +chroma
-partitions +parti4x4+partp8x8+partb8x8 -me umh -subq 7 -trellis 2 -refs 1
-coder 0 -me_range 16 -g 300 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71
-bt 300k -maxrate 300k -bufsize 300k -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6
-qmin 15 -qmax 51 -qdiff 4 -level 30 -aspect 320:240 $inputfile.avi<br>
<br>
<br>
mv $inputfile $inputfile.old<br>
mv $inputfile.avi $inputfile<br>
<br>
<br>
echo "Building seek table"<br>
mythcommflag --rebuild -f "$inputfile"<br>
<br>
echo "Clearing the cut list"<br>
mythcommflag --clearcutlist -f $inputfile<br>
<br>
echo "Commercial skip to cutlist"<br>
mythcommflag --gencutlist -f $inputfile<br>
<br>
filesize=$(wc -c $inputfile | awk '{print $1}')<br>
echo "Updating database"<br>
mysql -umythtv -pmythtv -hmymythtv mythconverg -se"UPDATE recorded SET
cutlist=0,filesize=$filesize WHERE basename=\"$basedname\";"<br>
else<br>
echo "Already an H264"<br>
<br>
fi<br>
}<br>
<br>
<br>
CONVLIST=`mysql -umythtv -pmythtv -hmymythtv mythconverg -se"select
basename from recorded where title like \"%$1%\";"`<br>
<br>
for i in ${CONVLIST[@]} ; do<br>
if ! test -L $VIDEO_DIR/$i ; then #its not a symnlink<br>
#Check if this recording is done -mmin +5<br>
filetoconvert=`find $VIDEO_DIR -name $i -mmin +5 | sed
's,^\(.*/\)\?\([^/]*\),\2,'`<br>
if [ -z "$filetoconvert" ]; then<br>
echo "$i is not finnished
recording...Skipping"<br>
else<br>
echo "Moving $i to
/mnt/VIDEO1"<br>
mv $VIDEO_DIR/$i /mnt/VIDEO1<br>
ln -sf /mnt/VIDEO1/$i $VIDEO_DIR/$i<br>
convert-to-h264 $i<br>
fi<br>
else<br>
echo "$i is already a symlink...Skipping"<br>
convert-to-h264 $i<br>
fi<br>
<br>
<br>
<br>
<br>
done<o:p></o:p></p>
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