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Pirma jei nepatinka m4a audio formatas ir klausai tik mp3:

1) Kuri faila m4a2mp3
2) sukali i jy toky scripta:

#!/bin/bash for i in *.m4a; do
echo "Converting: ${i%.m4a}.mp3"
faad -o - "$i" | lame - "${i%.m4a}.mp3"
done
3) su
chmod +x m4a2mp3
mv m4a2mp3 /bin/

ir turi utilita konversijai. aišku reikia kad LAME ir FAAD butu suinstalintas

Antra jei nepatinka matroskos mkv video formatas gali panaudoti toky scripta:

import sys
import os

def message(msg):
print "=" * 78
print "= %s" % msg
print "=" * 78

def usage():
print "Mastroka repacker script"
print " Usage: "+sys.argv[0]+ " filename"

if __name__ == "__main__":
if len(sys.argv) < 2:
usage()
else:
filename = sys.argv[1]
basename = filename[:-4]

message("Unpacking file: %s" % filename)
os.system("mkvextract tracks %s 1:temp_video.avi 2:temp_audio.ogg 3:%s.srt" % (filename,basename) )

message("Repacking file: %s.avi" % basename)
os.system("ffmpeg -i temp_audio.ogg -i temp_video.avi -vcodec copy %s.avi" % (basename) )

message("Cleaning files")
os.system("rm temp_video.avi temp_audio.ogg")

scripto veikimui reikia ffmpego ir mkvextracto