def make_thumbnail(self, options=None):
if not options:
options = {}
width = options.get('width', 0)
self.video_opts += [
('-frames:v', 1),
]
if width:
# ffmpeg will figure out the height by itself to keep the ratio
self.video_filter_chain += [
('scale', 'scale=%s:-1' % width),
]
frames_batch = 200 # frames to be analized
avinfo = self._get_input_avinfo()
if 'duration' in avinfo.video_streams[0]:
frame_count = int(avinfo.video_fps*float(avinfo.video_streams[0]['duration']))
if frame_count < frames_batch:
# For very short videos
frames_batch = frame_count
# The thumbnail filter extracts an image from the first frames
# Available since ffmpeg 2.0 (better to use a named parameter)
if is_option_available('ffmpeg', 'n .* set the frames batch size', regex=True):
self.video_filter_chain += [('thumbnail', 'thumbnail=n=%d' % frames_batch)]
else:
self.video_filter_chain += [('thumbnail', 'thumbnail=%d' % frames_batch)]
def make_thumbnail(self, options=None):
if not options:
options = {}
width = options.get("width", 0)
self.video_opts += [
("-frames:v", 1),
]
if width:
# ffmpeg will figure out the height by itself to keep the ratio
self.video_filter_chain += [
("scale", "scale=%s:-1" % width),
]
frames_batch = 200 # frames to be analized
avinfo = self._get_input_avinfo()
if "duration" in avinfo.video_streams[0]:
frame_count = int(avinfo.video_fps *
float(avinfo.video_streams[0]["duration"]))
if frame_count < frames_batch:
# For very short videos
frames_batch = frame_count
# The thumbnail filter extracts an image from the first frames
# Available since ffmpeg 2.0 (better to use a named parameter)
if is_option_available("ffmpeg",
"n .* set the frames batch size",
regex=True):
self.video_filter_chain += [("thumbnail",
"thumbnail=n=%d" % frames_batch)]
else:
self.video_filter_chain += [("thumbnail",
"thumbnail=%d" % frames_batch)]
def transcode_aac(self, options=None):
if not options:
options = {}
bitrate = options.get("bitrate", 0)
if bitrate == 0:
bitrate = 192
# libfaac is no longer available since ffmpeg 3.2
if is_option_available("ffmpeg", "faac", regex=True):
aac_codec = "libfaac"
else:
aac_codec = "aac"
self.audio_opts = [("-acodec", aac_codec), ("-b:a", "%sk" % bitrate)]
def transcode_aac(self, options=None):
if not options:
options = {}
bitrate = options.get('bitrate', 0)
if bitrate == 0:
bitrate = 192
# libfaac is no longer available since ffmpeg 3.2
if is_option_available('ffmpeg', 'faac', regex=True):
aac_codec = 'libfaac'
else:
aac_codec = 'aac'
self.audio_opts = [('-acodec', aac_codec), ('-b:a', '%sk' % bitrate)]
def transcode_aac(self, options=None):
if not options:
options = {}
bitrate = options.get('bitrate', 0)
if bitrate == 0:
bitrate = 192
# libfaac is no longer available since ffmpeg 3.2
if is_option_available('ffmpeg', 'faac', regex=True):
aac_codec = 'libfaac'
else:
aac_codec = 'aac'
self.audio_opts = [
('-acodec', aac_codec),
('-b:a', '%sk' % bitrate)
]
def transcode_imx(self, options=None):
if not options:
options = {}
bitrate = options.get('bitrate', 50000)
enable_fourcc_tagging = options.get('enable_fourcc_tagging', False)
avinfo = self._get_input_avinfo()
codec_tag = None
bufsize = 0
if not (avinfo.video_is_SD_PAL() or avinfo.video_is_SD_NTSC()):
raise FFmpegWorkerException('IMX codec only supports PAL and NTSC frame rates')
if bitrate not in [30000, 50000]:
raise FFmpegWorkerException('IMX codec does not support bitrate at %sk' % bitrate)
self.video_opts = []
self.video_opts += [
('-g', 0),
('-flags', '+ildct+low_delay'),
('-dc', 10),
('-intra_vlc', 1),
('-non_linear_quant', 1),
('-qscale', 1),
('-vcodec', 'mpeg2video'),
('-ps', 1),
('-qmin', 1),
('-qmax', 12),
('-lmin', '1*QP2LAMBDA'),
('-rc_max_vbv_use', 1),
('-pix_fmt', 'yuv422p'),
('-top', 1),
]
# Available since ffmpeg n2.3
if is_option_available('ffmpeg','d10_channelcount'):
self.video_opts += [
('-d10_channelcount', 8),
]
if avinfo.video_is_SD_PAL() and bitrate == 30000:
codec_tag = 'mx3p'
bufsize = 1200000
elif avinfo.video_is_SD_NTSC() and bitrate == 30000:
codec_tag = 'mx3n'
bufsize = 1001000
elif avinfo.video_is_SD_PAL() and bitrate == 50000:
codec_tag = 'mx5p'
bufsize = 2000000
elif avinfo.video_is_SD_NTSC() and bitrate == 50000:
codec_tag = 'mx5n'
bufsize = 1668334
self.video_opts += [
('-minrate', '%sk' % bitrate),
('-maxrate', '%sk' % bitrate),
('-b:v', '%sk' % bitrate),
('-bufsize', bufsize),
('-rc_init_occupancy', bufsize),
]
if enable_fourcc_tagging:
self.video_opts += [
('-vtag', codec_tag)
]
self.video_filter_chain = []
if avinfo.video_is_SD_NTSC():
self.video_filter_chain.append(('fieldorder', 'fieldorder=tff'))
if not avinfo.video_has_vbi:
if avinfo.video_is_SD_PAL():
self.video_filter_chain.append(('add_vbi', 'pad=720:608:00:32'))
elif avinfo.video_is_SD_NTSC():
self.video_filter_chain.append(('add_vbi', 'pad=720:512:00:32'))
self.keep_vbi_lines = True
self.mov_imx_header = True
def transcode_imx(self, options=None):
if not options:
options = {}
bitrate = options.get("bitrate", 50000)
enable_fourcc_tagging = options.get("enable_fourcc_tagging", False)
avinfo = self._get_input_avinfo()
codec_tag = None
bufsize = 0
if not (avinfo.video_is_SD_PAL() or avinfo.video_is_SD_NTSC()):
raise FFmpegWorkerException(
"IMX codec only supports PAL and NTSC frame rates")
if bitrate not in [30000, 50000]:
raise FFmpegWorkerException(
"IMX codec does not support bitrate at %sk" % bitrate)
self.video_opts = []
self.video_opts += [
("-g", 0),
("-flags", "+ildct+low_delay"),
("-dc", 10),
("-intra_vlc", 1),
("-non_linear_quant", 1),
("-qscale", 1),
("-vcodec", "mpeg2video"),
("-ps", 1),
("-qmin", 1),
("-qmax", 12),
("-lmin", "1*QP2LAMBDA"),
("-rc_max_vbv_use", 1),
("-pix_fmt", "yuv422p"),
("-top", 1),
]
# Available since ffmpeg n2.3
if is_option_available("ffmpeg", "d10_channelcount"):
self.video_opts += [
("-d10_channelcount", 8),
]
if avinfo.video_is_SD_PAL() and bitrate == 30000:
codec_tag = "mx3p"
bufsize = 1200000
elif avinfo.video_is_SD_NTSC() and bitrate == 30000:
codec_tag = "mx3n"
bufsize = 1001000
elif avinfo.video_is_SD_PAL() and bitrate == 50000:
codec_tag = "mx5p"
bufsize = 2000000
elif avinfo.video_is_SD_NTSC() and bitrate == 50000:
codec_tag = "mx5n"
bufsize = 1668334
self.video_opts += [
("-minrate", "%sk" % bitrate),
("-maxrate", "%sk" % bitrate),
("-b:v", "%sk" % bitrate),
("-bufsize", bufsize),
("-rc_init_occupancy", bufsize),
]
if enable_fourcc_tagging:
self.video_opts += [("-vtag", codec_tag)]
self.video_filter_chain = []
if avinfo.video_is_SD_NTSC():
self.video_filter_chain.append(("fieldorder", "fieldorder=tff"))
if not avinfo.video_has_vbi:
if avinfo.video_is_SD_PAL():
self.video_filter_chain.append(
("add_vbi", "pad=720:608:00:32"))
elif avinfo.video_is_SD_NTSC():
self.video_filter_chain.append(
("add_vbi", "pad=720:512:00:32"))
self.keep_vbi_lines = True
self.mov_imx_header = True
def transcode_imx(self, options=None):
if not options:
options = {}
bitrate = options.get('bitrate', 50000)
enable_fourcc_tagging = options.get('enable_fourcc_tagging', False)
avinfo = self._get_input_avinfo()
codec_tag = None
bufsize = 0
if not (avinfo.video_is_SD_PAL() or avinfo.video_is_SD_NTSC()):
raise FFmpegWorkerException(
'IMX codec only supports PAL and NTSC frame rates')
if bitrate not in [30000, 50000]:
raise FFmpegWorkerException(
'IMX codec does not support bitrate at %sk' % bitrate)
self.video_opts = []
self.video_opts += [
('-g', 0),
('-flags', '+ildct+low_delay'),
('-dc', 10),
('-intra_vlc', 1),
('-non_linear_quant', 1),
('-qscale', 1),
('-vcodec', 'mpeg2video'),
('-ps', 1),
('-qmin', 1),
('-qmax', 12),
('-lmin', '1*QP2LAMBDA'),
('-rc_max_vbv_use', 1),
('-pix_fmt', 'yuv422p'),
('-top', 1),
]
# Available since ffmpeg n2.3
if is_option_available('ffmpeg', 'd10_channelcount'):
self.video_opts += [
('-d10_channelcount', 8),
]
if avinfo.video_is_SD_PAL() and bitrate == 30000:
codec_tag = 'mx3p'
bufsize = 1200000
elif avinfo.video_is_SD_NTSC() and bitrate == 30000:
codec_tag = 'mx3n'
bufsize = 1001000
elif avinfo.video_is_SD_PAL() and bitrate == 50000:
codec_tag = 'mx5p'
bufsize = 2000000
elif avinfo.video_is_SD_NTSC() and bitrate == 50000:
codec_tag = 'mx5n'
bufsize = 1668334
self.video_opts += [
('-minrate', '%sk' % bitrate),
('-maxrate', '%sk' % bitrate),
('-b:v', '%sk' % bitrate),
('-bufsize', bufsize),
('-rc_init_occupancy', bufsize),
]
if enable_fourcc_tagging:
self.video_opts += [('-vtag', codec_tag)]
self.video_filter_chain = []
if avinfo.video_is_SD_NTSC():
self.video_filter_chain.append(('fieldorder', 'fieldorder=tff'))
if not avinfo.video_has_vbi:
if avinfo.video_is_SD_PAL():
self.video_filter_chain.append(
('add_vbi', 'pad=720:608:00:32'))
elif avinfo.video_is_SD_NTSC():
self.video_filter_chain.append(
('add_vbi', 'pad=720:512:00:32'))
self.keep_vbi_lines = True
self.mov_imx_header = True
