Greetings, We are compressing using ffmpeg and the following is our scripts I would like to have your recommendations on this. Technically it works OK, but your suggestions are very welcome. My interest is to have your input on compression standards since the world is changing so fast.
In short we have these suggestions Mpeg2 for backup. 3500K 1024k 512k 268k 130k 038k with metta Mettavihari ----------------------------- #2pass hq ffmpeg mp4 3500k file for Television Broadcast ffmpeg -i $file1.$ext \ -pass 1 -vcodec libx264 -preset fast -b:v 3500k -minrate 1024k -maxrate 3500k -bufsize 3500k -threads 0 -f mp4 -an -y /dev/null && \ ffmpeg -i $file1.$ext -pass 2 -acodec libfaac -ab 128k -ac 2 -vcodec libx264 \ -preset fast -b:v 3500k -minrate 3500k -maxrate 3500k -bufsize 3500k -threads 0 -f mp4 $file1.temp2.mp4 sleep 30 rm *.log* qt-faststart $file1.temp2.mp4 $file1-3500k.mp4 rm $file1.temp2.mp4 #2pass hq ffmpeg mp4 1024k file For good quality Internet download ffmpeg -i $file1.$ext \ -pass 1 -vcodec libx264 -preset fast -b:v 1024k -minrate 1024k -maxrate 1024k -bufsize 1024k -threads 0 -f mp4 -an -y /dev/null && \ ffmpeg -i $file1.$ext -pass 2 -acodec libfaac -ab 128k -ac 2 -vcodec libx264 \ -preset fast -b:v 1024k -minrate 1024k -maxrate 1024k -bufsize 1024k -threads 0 -f mp4 $file1.temp2.mp4 sleep 30 rm *.log* qt-faststart $file1.temp2.mp4 $file1-1024k.mp4 rm $file1.temp2.mp4 #2pass hq ffmpeg mp4 512k file for normal quality download ffmpeg -i $file1.$ext \ -pass 1 -vcodec libx264 -preset fast -b:v 512k -minrate 512k -maxrate 512k -bufsize 512k -threads 0 -f mp4 -an -y /dev/null && \ ffmpeg -i $file1.$ext -pass 2 -acodec libfaac -ab 128k -ac 2 -vcodec libx264 \ -preset fast -b:v 512k -minrate 512k -maxrate 512k -bufsize 512k -threads 0 -f mp4 $file1.temp.mp4 sleep 30 rm *.log* qt-faststart $file1.temp.mp4 $file1-512k.mp4 rm $file1.temp.mp4 #dvd-vob a backup version that we keep for later editing if needed. ffmpeg -i $file1.$ext -target pal-dvd -aspect 4:3 $path1$file1-dvd.vob sleep 30 #268k-mp4 for streaming in Sri Lanka with a low bandwidth ffmpeg -i $file1.$ext -b 268k -minrate 268k -maxrate 268k -bufsize 268k -r 24 -s vga -vcodec libx264 -acodec libfaac -ac 2 -ab 128k -ar 22050 -vol 800 -f mp4 $file1-temp.mp4 qt-faststart $file1-temp.mp4 $file1-268k.mp4 rm $file1-temp.mp4 #130k-mp4 for tablet viewing ffmpeg -i $file1.$ext -vlevel 10 -g 25 -b 130k -minrate 130k -maxrate 130k -bufsize 130k -r 10 -s qvga -vcodec libx264 -acodec libfaac -ac 2 -ab 128k -ar 22050 -vol 800 -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 $file1.temp-3q.3gp qt-faststart $file1.temp-3q.3gp $file1-130k.mp4 rm $file1.temp-3q.3gp #38k-mp4 for phone viewing. ffmpeg -i $file1.$ext -vlevel 10 -g 25 -b 38k -minrate 38k -maxrate 38k -bufsize 38k -r 8 -s qcif -vcodec libx264 -acodec libfaac -ac 2 -ab 128k -ar 22050 -vol 800 -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 $file1.temp-2q.3gp qt-faststart $file1.temp-2q.3gp $file1-38k.mp4 rm $file1.temp-2q.3gp _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
