def extractAVI(self, headers):
audio_index = 1
for stream in headers.array("stream"):
if "stream_hdr/stream_type" not in stream:
continue
stream_type = stream["stream_hdr/stream_type"].value
if stream_type == "vids":
if "stream_hdr" in stream:
meta = Metadata(self)
self.extractAVIVideo(stream["stream_hdr"], meta)
self.addGroup("video", meta, "Video stream")
elif stream_type == "auds":
if "stream_fmt" in stream:
meta = Metadata(self)
self.extractAVIAudio(stream["stream_fmt"], meta)
self.addGroup("audio[%u]" % audio_index, meta,
"Audio stream")
audio_index += 1
if "avi_hdr" in headers:
self.useAviHeader(headers["avi_hdr"])
# Compute global bit rate
if self.has("duration") and "/movie/size" in headers:
self.bit_rate = float(
headers["/movie/size"].value) * 8 / timedelta2seconds(
self.get('duration'))
# Video has index?
if "/index" in headers:
self.comment = _("Has audio/video index (%s)") \
% humanFilesize(headers["/index"].size/8)
def extractAVI(self, headers):
audio_index = 1
for stream in headers.array("stream"):
if "stream_hdr/stream_type" not in stream:
continue
stream_type = stream["stream_hdr/stream_type"].value
if stream_type == "vids":
if "stream_hdr" in stream:
meta = Metadata(self)
self.extractAVIVideo(stream["stream_hdr"], meta)
self.addGroup("video", meta, "Video stream")
elif stream_type == "auds":
if "stream_fmt" in stream:
meta = Metadata(self)
self.extractAVIAudio(stream["stream_fmt"], meta)
self.addGroup("audio[%u]" % audio_index, meta, "Audio stream")
audio_index += 1
if "avi_hdr" in headers:
self.useAviHeader(headers["avi_hdr"])
# Compute global bit rate
if self.has("duration") and "/movie/size" in headers:
self.bit_rate = float(headers["/movie/size"].value) * 8 / timedelta2seconds(self.get("duration"))
# Video has index?
if "/index" in headers:
self.comment = _("Has audio/video index (%s)") % humanFilesize(headers["/index"].size / 8)
def computeComprRate(meta, size):
if not meta.has("duration") \
or not meta.has("sample_rate") \
or not meta.has("bits_per_sample") \
or not meta.has("nb_channel") \
or not size:
return
orig_size = timedelta2seconds(meta.get("duration")) * meta.get(
'sample_rate') * meta.get('bits_per_sample') * meta.get('nb_channel')
meta.compr_rate = float(orig_size) / size
def extract(self, flv):
if "video[0]" in flv:
meta = Metadata(self)
self.extractVideo(flv["video[0]"], meta)
self.addGroup("video", meta, "Video stream")
if "audio[0]" in flv:
meta = Metadata(self)
self.extractAudio(flv["audio[0]"], meta)
self.addGroup("audio", meta, "Audio stream")
# TODO: Computer duration
# One technic: use last video/audio chunk and use timestamp
# But this is very slow
self.format_version = flv.description
if "metadata/entry[1]" in flv:
self.extractAMF(flv["metadata/entry[1]"])
if self.has('duration'):
self.bit_rate = flv.size / timedelta2seconds(self.get('duration'))
