mp4 utils

readme.txt

Some barebones python scripts I wrote for converting mp4 files (just wraps ffmpeg).
– searches the current directory for files (there is no cli interface)
– skips files that have already been converted (or a file with the same name and
  target file extension already exists - eg. foo.avi / foo.mp4
– input file formats can be changed by setting src_formats
– runs in parallel using python's awesome multiprocessing library. (see NUM_THREADS)

requires ffmpeg / avconv, so install those using your favorite package manager before running.

extractmp3.py

#!/usr/bin/python
import os
from multiprocessing import Pool
NUM_THREADS = 8

cur_dir = '.'
src_formats = [ '.mp4' ]
dst_format  = '.mp3'
conv_cmd = 'avconv -i "{0}" "{1}"'


not_hidden = lambda s: not s.startswith('.')
files = filter(not_hidden, os.listdir(cur_dir))

class FileObj(object):
    def __init__ (self,path):
        self.name, self.ext = os.path.splitext(path)
    def __cmp__(self,other):
        return cmp(self.name, other.name)

files = map(FileObj, files)
matching_ = lambda exts: lambda f: f.ext in exts
matching = lambda exts: matching_(set(exts))

input_files = set(filter(matching(src_formats), files))
output_files = set(filter(matching([ dst_format ]), files))

dupl_files = output_files & input_files
if dupl_files:
    print("Skipping %d file(s): "%len(dupl_files))
    for file_ in dupl_files:
        print('-- %s.%s/.%s'%(file_.name, file_.ext, dst_format))

def run(cmd):
    print("running '%s'"%cmd)
    os.system(cmd)

files_to_conv = input_files - output_files
if files_to_conv:
    print('Converting %d file(s)'%len(files_to_conv))

join_ext = lambda fname, fext: '%s%s'%(fname, fext)
def process_each(file_):
    run(conv_cmd.format(
        join_ext(file_.name, file_.ext), 
        join_ext(file_.name, dst_format)))

p = Pool(NUM_THREADS)
p.map(process_each, files_to_conv)
print("Finished converting %d files"%len(files_to_conv))

mp4ify.py

#!/usr/bin/python
import os
from multiprocessing import Pool
NUM_THREADS = 8

''' flv/avi/ts/etc to mp4 converter (must have ffmpeg installed!) '''

cur_dir = '.'
src_formats = [ '.flv', '.avi', '.ts', '.m4v', '.mkv', '.mov' ]
dst_format  = '.mp4'
conv_cmd = 'ffmpeg -i "{0}" -c copy -copyts "{1}"'


not_hidden = lambda s: not s.startswith('.')
files = filter(not_hidden, os.listdir(cur_dir))

class FileObj(object):
	def __init__ (self,path):
		self.name, self.ext = os.path.splitext(path)
	def __cmp__(self,other):
		return cmp(self.name, other.name)

files = map(FileObj, files)
matching_ = lambda exts: lambda f: f.ext in exts
matching = lambda exts: matching_(set(exts))

video_files = set(filter(matching(src_formats), files))
mp4_files   = set(filter(matching([ dst_format ]), files))

dupl_files = mp4_files & video_files
if dupl_files:
	print("Skipping %d file(s): "%len(dupl_files))
	for file_ in dupl_files:
		print('-- %s.%s/.%s'%(file_.name, file_.ext, dst_format))

def run(cmd):
	print("running '%s'"%cmd)
	os.system(cmd)

files_to_conv = video_files - mp4_files
if files_to_conv:
	print('Converting %d file(s)'%len(files_to_conv))

join_ext = lambda fname, fext: '%s%s'%(fname, fext)
def process_each(file_):
	run(conv_cmd.format(
		join_ext(file_.name, file_.ext), 
		join_ext(file_.name, dst_format)))

p = Pool(NUM_THREADS)
p.map(process_each, files_to_conv)
print("Finished converting %d files"%len(files_to_conv))