Author: tack
Date: Tue Jan 2 21:35:14 2007
New Revision: 2334
Modified:
trunk/metadata/src/video/riff.py
Log:
Guess length of wave file; add FIXMEs
Modified: trunk/metadata/src/video/riff.py
==============================================================================
--- trunk/metadata/src/video/riff.py (original)
+++ trunk/metadata/src/video/riff.py Tue Jan 2 21:35:14 2007
@@ -208,6 +208,7 @@
ai.samplerate = retval['nSamplesPerSec']
ai.channels = retval['nChannels']
ai.samplebits = retval['nBitsPerSample']
+ # FIXME: Bitrate calculation is completely wrong.
ai.bitrate = retval['nAvgBytesPerSec'] * 8
# TODO: set code if possible
# http://www.stats.uwa.edu.au/Internal/Specs/DXALL/FileSpec/\
@@ -232,6 +233,7 @@
vi.codec = t[16:20]
vi.width = retval['biWidth']
vi.height = retval['biHeight']
+ # FIXME: Bitrate calculation is completely wrong.
vi.bitrate = strh['dwRate']
vi.fps = float(strh['dwRate']) / strh['dwScale']
vi.length = strh['dwLength'] / vi.fps
@@ -548,6 +550,14 @@
self._set('bitrate', fmt[3])
# Set a dummy fourcc so codec will be resolved in finalize.
self._set('fourcc', 'dummy')
+ elif name == 'data':
+ # XXX: this is naive and may not be right. For example if the
+ # stream is something that supports VBR like mp3, the value
+ # will be off. The only way to properly deal with this issue
+ # is to decode part of the stream based on its codec, but
+ # kaa.metadata doesn't have this capability (yet?)
+ self._set('length', size / float(self.bitrate))
+ file.seek(size, 1)
elif not name.strip(string.printable + string.whitespace):
# check if name is something usefull at all, maybe it is no
# avi or broken
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