create mass videos for e.g. youtube, out of (music) files:

$cd ffmpeg folder, then:

1. check if all files aren't corrupt so the 2nd script will run without stopping because of this kind of error:

for FILE in musicfiles/*; do \
    CUTEXTENSION=${FILE%.*}; \
    #LENGTH=`mp3info -p "00:%02m:%02s" "$FILE"`; \
    LENGTH=`./ffmpeg -i ./"$FILE" 2>&1 | awk '/Duration/ { print substr($2,0,length($2)-1) }'`; \
    echo $LENGTH $FILE; \
done

2. create mass vids:

for FILE in musicfiles/*; do \
    CUTEXTENSION=${FILE%.*}; \
    #LENGTH=`mp3info -p "00:%02m:%02s" "$FILE"`; \ #this is obsolete because works only on mp3 files
    LENGTH=`./ffmpeg -i ./"$FILE" 2>&1 | awk '/Duration/ { print substr($2,0,length($2)-1) }'`; \
    ./ffmpeg -loop_input -shortest -i ./img.png -i "./$FILE" -t $LENGTH -y -vcodec libx264  -vpre slow -acodec libfaac -ac 2 -ab 128k -ar 44100 -r 1 "./$CUTEXTENSION.mp4"; \
done