def extract_image(source, destination, time=0.2):
log.debug('extract_image - %s', os.path.basename(source))
cmds = (
lambda: _run_tool(
*ENCODE_VIDEO_COMMON_ARGS,
'-i', source,
*cmd_args(
ss=str(time),
vframes=1,
an=None,
vf=CONFIG['encode_preview']['vf'],
),
destination,
),
lambda: (os.path.exists(destination), 'expected destiantion image file was not generated (video source may be damaged) {0}'.format(source)),
lambda: _run_tool(
'jpegoptim',
#'--size={}'.format(CONFIG['jpegoptim']['target_size_k']),
'--strip-all',
'--overwrite',
destination,
),
)
for cmd in cmds:
cmd_success, cmd_result = cmd()
if not cmd_success:
return False, cmd_result
return True, None
def encode_audio(source, destination, **kwargs):
"""
Decompress audio
Normalize audio volume
Offset audio
"""
log.debug('encode_audio - %s', os.path.basename(source))
path = os.path.dirname(destination)
cmds = (
lambda: _run_tool(
*ENCODE_VIDEO_COMMON_ARGS,
'-i', source,
*cmd_args(
**CONFIG['extract_audio']
),
os.path.join(path, 'audio_raw.wav'),
),
lambda: _run_tool(
'sox',
os.path.join(path, 'audio_raw.wav'),
#os.path.join(path, 'audio_norm.wav'),
destination,
'fade', 'l', '0.15', '0', '0.15',
'norm',
),
# TODO: Cut and offset
)
for cmd in cmds:
cmd_success, cmd_result = cmd()
if not cmd_success:
return False, cmd_result
return True, None
def extract_image(source, destination, time=0.2):
log.debug('extract_image - %s', os.path.basename(source))
cmds = (
lambda: _run_tool(
*ENCODE_VIDEO_COMMON_ARGS,
'-i', source,
*cmd_args(
ss=str(time),
vframes=1,
an=None,
vf=CONFIG['encode_preview']['vf'],
),
destination,
),
lambda: (os.path.exists(destination), 'expected destiantion image file was not generated (video source may be damaged) {0}'.format(source)),
lambda: _run_tool(
'jpegoptim',
#'--size={}'.format(CONFIG['jpegoptim']['target_size_k']),
'--strip-all',
'--overwrite',
destination,
),
)
for cmd in cmds:
cmd_success, cmd_result = cmd()
if not cmd_success:
return False, cmd_result
return True, None
def _run_tool(*args, **kwargs):
cmd = cmd_args(*args, **kwargs)
log.debug(cmd)
cmd_result = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, timeout=CONFIG['process_timeout_seconds'])
if cmd_result.returncode != 0:
log.error(cmd_result)
return CommandResult(cmd_result.returncode == 0, cmd_result)
def _run_tool(*args, **kwargs):
cmd = cmd_args(*args, **kwargs)
log.debug(cmd)
cmd_result = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, timeout=CONFIG['process_timeout_seconds'])
if cmd_result.returncode != 0:
log.error(cmd_result)
return CommandResult(cmd_result.returncode == 0, cmd_result)
def encode_audio(source, destination, **kwargs):
"""
Decompress audio
Normalize audio volume
Offset audio
"""
log.debug('encode_audio - %s', os.path.basename(source))
path = os.path.dirname(destination)
cmds = (
lambda: _run_tool(
*ENCODE_VIDEO_COMMON_ARGS,
'-i', source,
*cmd_args(
**CONFIG['extract_audio']
),
os.path.join(path, 'audio_raw.wav'),
),
lambda: _run_tool(
'sox',
os.path.join(path, 'audio_raw.wav'),
#os.path.join(path, 'audio_norm.wav'),
destination,
'fade', 'l', '0.15', '0', '0.15',
'norm',
),
# TODO: Cut and offset
)
for cmd in cmds:
cmd_success, cmd_result = cmd()
if not cmd_success:
return False, cmd_result
return True, None
def encode_image_to_video(source, destination, duration=10, width=320, height=240, **kwargs):
"""
Todo: use same codec as encode_video
"""
log.debug('encode_image_to_video - %s', os.path.basename(source))
_run_tool(
*ENCODE_VIDEO_COMMON_ARGS,
'-loop', '1',
'-i', source,
*cmd_args(
t=duration,
**CONFIG['encode_image_to_video'],
),
destination,
)
def encode_image_to_video(source, destination, duration=10, width=320, height=240, **kwargs):
"""
Todo: use same codec as encode_video
"""
log.debug('encode_image_to_video - %s', os.path.basename(source))
_run_tool(
*ENCODE_VIDEO_COMMON_ARGS,
'-loop', '1',
'-i', source,
*cmd_args(
t=duration,
**CONFIG['encode_image_to_video'],
),
destination,
)
def encode_preview_video(source, destination):
"""
https://trac.ffmpeg.org/wiki/Encode/AAC#HE-AACversion2
"""
log.debug('encode_preview_video - %s', os.path.basename(source))
#crf = crf_from_res(**probe_media(source))
#log.debug('crf: %s', crf)
return _run_tool(
*ENCODE_VIDEO_COMMON_ARGS,
'-i', source,
*cmd_args(
**CONFIG['encode_preview']
),
destination,
)
def encode_video(video_source, audio_source, subtitle_source, destination):
log.debug('encode_video - %s', os.path.basename(video_source))
filters = [CONFIG['scale_even']]
if subtitle_source:
filters.append('subtitles={}'.format(subtitle_source))
return _run_tool(
*ENCODE_VIDEO_COMMON_ARGS,
'-i', video_source,
'-i', audio_source,
*cmd_args(
vf=', '.join(filters),
**CONFIG['encode_video'],
),
destination,
)
def encode_preview_video(source, destination):
"""
https://trac.ffmpeg.org/wiki/Encode/AAC#HE-AACversion2
"""
log.debug('encode_preview_video - %s', os.path.basename(source))
#crf = crf_from_res(**probe_media(source))
#log.debug('crf: %s', crf)
return _run_tool(
*ENCODE_VIDEO_COMMON_ARGS,
'-i', source,
*cmd_args(
**CONFIG['encode_preview']
),
destination,
)
def encode_video(video_source, audio_source, subtitle_source, destination):
log.debug('encode_video - %s', os.path.basename(video_source))
filters = [CONFIG['scale_even']]
if subtitle_source:
filters.append('subtitles={}'.format(subtitle_source))
return _run_tool(
*ENCODE_VIDEO_COMMON_ARGS,
'-i', video_source,
'-i', audio_source,
*cmd_args(
vf=', '.join(filters),
**CONFIG['encode_video'],
),
destination,
)
#ac=1,
},
# The width and height must be divisable by 2
# Using w=320:h-1 should auto set the height preserving aspect ratio
# Sometimes using this method the height is an odd number, which fails to encode
# From the avconv documentation we have some mathmatical functions and variables
# 'a' is the aspect ratio. floor() rounds down to nearest integer
# If we divide by 2 and ensure that an integer, multiplying by 2 must be divisable by 2
})
ENCODE_VIDEO_COMMON_ARGS = cmd_args(
'nice',
'ffmpeg',
#threads=CONFIG['threads'],
loglevel=CONFIG['log_level'],
y=None,
)
def check_tools():
"""
Assert exteranl dependeycs
"""
# check ffmpeg (with dependencys)
# check sox
# check jpegoptim
# check (h264 or libx264)?
pass
#'profile:a': 'aac_he_v1',
#ac=1,
},
# The width and height must be divisable by 2
# Using w=320:h-1 should auto set the height preserving aspect ratio
# Sometimes using this method the height is an odd number, which fails to encode
# From the avconv documentation we have some mathmatical functions and variables
# 'a' is the aspect ratio. floor() rounds down to nearest integer
# If we divide by 2 and ensure that an integer, multiplying by 2 must be divisable by 2
})
ENCODE_VIDEO_COMMON_ARGS = cmd_args(
'ffmpeg',
threads=CONFIG['threads'],
loglevel=CONFIG['log_level'],
y=None,
)
def check_tools():
"""
Assert exteranl dependeycs
"""
# check (h264 or libx264):
# avprobe
# check ffmpeg (with dependencys)
# check sox
pass