标签:ffmpeg python 合成 subprocess params file path os
#!/usr/bin/env python
import logging
import os
import subprocess
import sys
try:
from subprocess import DEVNULL
except ImportError:
# Python 3.2 or below
import os
import atexit
DEVNULL = os.open(os.devnull, os.O_RDWR)
atexit.register(lambda fd: os.close(fd), DEVNULL)
def get_usable_ffmpeg(cmd):
try:
p = subprocess.Popen([cmd, '-version'], stdin=DEVNULL, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = p.communicate()
vers = out.split('\n')[0].split()
assert (vers[0] == 'ffmpeg' and vers[2][0] > '0') or (vers[0] == 'avconv')
try:
v = vers[2][1:] if vers[2][0] == 'n' else vers[2]
version = [int(i) for i in v.split('.')]
except:
version = [1, 0]
return cmd, 'ffprobe', version
except:
return None
FFMPEG, FFPROBE, FFMPEG_VERSION = get_usable_ffmpeg('ffmpeg') or get_usable_ffmpeg('avconv') or (None, None, None)
if logging.getLogger().isEnabledFor(logging.DEBUG):
LOGLEVEL = ['-loglevel', 'info']
STDIN = None
else:
LOGLEVEL = ['-loglevel', 'quiet']
STDIN = DEVNULL
def has_ffmpeg_installed():
return FFMPEG is not None
def ffmpeg_concat_av(files, output, ext):
print('Merging video parts... ')
params = [FFMPEG] + LOGLEVEL
for file in files:
if os.path.isfile(file): params.extend(['-i', file])
params.extend(['-c', 'copy'])
params.append(output)
if subprocess.call(params, stdin=STDIN):
print('Merging without re-encode failed.\nTry again re-encoding audio... ')
try:
os.remove(output)
except Exception:
pass
params = [FFMPEG] + LOGLEVEL
for file in files:
if os.path.isfile(file): params.extend(['-i', file])
params.extend(['-c:v', 'copy'])
if ext == 'mp4':
params.extend(['-c:a', 'aac'])
params.extend(['-strict', 'experimental'])
elif ext == 'webm':
params.extend(['-c:a', 'opus'])
params.append(output)
return subprocess.call(params, stdin=STDIN)
else:
return 0
if __name__ == '__main__':
parent_path = os.path.dirname(os.path.dirname(__file__))
file_name1 = os.path.join(parent_path,"data","1.m4s")
file_name2 = os.path.join(parent_path,"data", "2.m4s")
mp4_file = os.path.join(parent_path,"data","3.mp4")
print has_ffmpeg_installed()
ffmpeg_concat_av([file_name2,file_name1],mp4_file,ext="mp4")
标签:ffmpeg,python,合成,subprocess,params,file,path,os 来源: https://www.cnblogs.com/c-x-a/p/13045731.html
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