Read a QuickTime movie and return the frames.
diff --git a/Mac/Lib/videoreader.py b/Mac/Lib/videoreader.py
new file mode 100644
index 0000000..9691875
--- /dev/null
+++ b/Mac/Lib/videoreader.py
@@ -0,0 +1,276 @@
+# Video file reader, using QuickTime
+#
+# This module was quickly ripped out of another software package, so there is a good
+# chance that it does not work as-is and it needs some hacking.
+#
+# Jack Jansen, August 2000
+#
+import sys
+import Qt
+import QuickTime
+import Qd
+import Qdoffs
+import QDOffscreen
+import Res
+import MediaDescr
+import imgformat
+import os
+# import audio.format
+import macfs
+
+class VideoFormat:
+ def __init__(self, name, descr, width, height, format):
+ self.__name = name
+ self.__descr = descr
+ self.__width = width
+ self.__height = height
+ self.__format = format
+
+ def getname(self):
+ return self.__name
+
+ def getdescr(self):
+ return self.__descr
+
+ def getsize(self):
+ return self.__width, self.__height
+
+ def getformat(self):
+ return self.__format
+
+class _Reader:
+ def __init__(self, path):
+ fsspec = macfs.FSSpec(path)
+ fd = Qt.OpenMovieFile(fsspec, 0)
+ self.movie, d1, d2 = Qt.NewMovieFromFile(fd, 0, 0)
+ self.movietimescale = self.movie.GetMovieTimeScale()
+ try:
+ self.audiotrack = self.movie.GetMovieIndTrackType(1,
+ QuickTime.AudioMediaCharacteristic, QuickTime.movieTrackCharacteristic)
+ self.audiomedia = self.audiotrack.GetTrackMedia()
+ except Qt.Error:
+ self.audiotrack = self.audiomedia = None
+ self.audiodescr = {}
+ else:
+ handle = Res.Handle('')
+ n = self.audiomedia.GetMediaSampleDescriptionCount()
+ self.audiomedia.GetMediaSampleDescription(1, handle)
+ self.audiodescr = MediaDescr.SoundDescription.decode(handle.data)
+ self.audiotimescale = self.audiomedia.GetMediaTimeScale()
+ del handle
+
+ try:
+ self.videotrack = self.movie.GetMovieIndTrackType(1,
+ QuickTime.VisualMediaCharacteristic, QuickTime.movieTrackCharacteristic)
+ self.videomedia = self.videotrack.GetTrackMedia()
+ except Qt.Error:
+ self.videotrack = self.videomedia = self.videotimescale = None
+ if self.videotrack:
+ self.videotimescale = self.videomedia.GetMediaTimeScale()
+ x0, y0, x1, y1 = self.movie.GetMovieBox()
+ self.videodescr = {'width':(x1-x0), 'height':(y1-y0)}
+ self._initgworld()
+ self.videocurtime = None
+ self.audiocurtime = None
+
+
+ def __del__(self):
+ self.audiomedia = None
+ self.audiotrack = None
+ self.videomedia = None
+ self.videotrack = None
+ self.movie = None
+
+ def _initgworld(self):
+ old_port, old_dev = Qdoffs.GetGWorld()
+ try:
+ movie_w = self.videodescr['width']
+ movie_h = self.videodescr['height']
+ movie_rect = (0, 0, movie_w, movie_h)
+ self.gworld = Qdoffs.NewGWorld(32, movie_rect, None, None, QDOffscreen.keepLocal)
+ self.pixmap = self.gworld.GetGWorldPixMap()
+ Qdoffs.LockPixels(self.pixmap)
+ Qdoffs.SetGWorld(self.gworld.as_GrafPtr(), None)
+ Qd.EraseRect(movie_rect)
+ self.movie.SetMovieGWorld(self.gworld.as_GrafPtr(), None)
+ self.movie.SetMovieBox(movie_rect)
+ self.movie.SetMovieActive(1)
+ self.movie.MoviesTask(0)
+ self.movie.SetMoviePlayHints(QuickTime.hintsHighQuality, QuickTime.hintsHighQuality)
+ # XXXX framerate
+ finally:
+ Qdoffs.SetGWorld(old_port, old_dev)
+
+ def _gettrackduration_ms(self, track):
+ tracktime = track.GetTrackDuration()
+ return self._movietime_to_ms(tracktime)
+
+ def _movietime_to_ms(self, time):
+ value, d1, d2 = Qt.ConvertTimeScale((time, self.movietimescale, None), 1000)
+ return value
+
+ def _videotime_to_ms(self, time):
+ value, d1, d2 = Qt.ConvertTimeScale((time, self.videotimescale, None), 1000)
+ return value
+
+ def _audiotime_to_ms(self, time):
+ value, d1, d2 = Qt.ConvertTimeScale((time, self.audiotimescale, None), 1000)
+ return value
+
+ def _videotime_to_movietime(self, time):
+ value, d1, d2 = Qt.ConvertTimeScale((time, self.videotimescale, None),
+ self.movietimescale)
+ return value
+
+ def HasAudio(self):
+ return not self.audiotrack is None
+
+ def HasVideo(self):
+ return not self.videotrack is None
+
+ def GetAudioDuration(self):
+ if not self.audiotrack:
+ return 0
+ return self._gettrackduration_ms(self.audiotrack)
+
+ def GetVideoDuration(self):
+ if not self.videotrack:
+ return 0
+ return self._gettrackduration_ms(self.videotrack)
+
+ def GetAudioFormat(self):
+ bps = self.audiodescr['sampleSize']
+ nch = self.audiodescr['numChannels']
+ if nch == 1:
+ channels = ['mono']
+ elif nch == 2:
+ channels = ['left', 'right']
+ else:
+ channels = map(lambda x: str(x+1), range(nch))
+ if bps % 8:
+ # Funny bits-per sample. We pretend not to understand
+ blocksize = 0
+ fpb = 0
+ else:
+ # QuickTime is easy (for as far as we support it): samples are always a whole
+ # number of bytes, so frames are nchannels*samplesize, and there's one frame per block.
+ blocksize = (bps/8)*nch
+ fpb = 1
+ if self.audiodescr['dataFormat'] == 'raw ':
+ encoding = 'linear-excess'
+ elif self.audiodescr['dataFormat'] == 'twos':
+ encoding = 'linear-signed'
+ else:
+ encoding = 'quicktime-coding-%s'%self.audiodescr['dataFormat']
+## return audio.format.AudioFormatLinear('quicktime_audio', 'QuickTime Audio Format',
+## channels, encoding, blocksize=blocksize, fpb=fpb, bps=bps)
+ return channels, encoding, blocksize, fpb, bps
+
+ def GetAudioFrameRate(self):
+ return int(self.audiodescr['sampleRate'])
+
+ def GetVideoFormat(self):
+ width = self.videodescr['width']
+ height = self.videodescr['height']
+ return VideoFormat('dummy_format', 'Dummy Video Format', width, height, imgformat.macrgb)
+
+ def GetVideoFrameRate(self):
+ tv = self.videocurtime
+ if tv == None:
+ tv = 0
+ flags = QuickTime.nextTimeStep|QuickTime.nextTimeEdgeOK
+ tv, dur = self.videomedia.GetMediaNextInterestingTime(flags, tv, 1.0)
+ dur = self._videotime_to_ms(dur)
+ return int((1000.0/dur)+0.5)
+
+ def ReadAudio(self, nframes, time=None):
+ if not time is None:
+ self.audiocurtime = time
+ flags = QuickTime.nextTimeStep|QuickTime.nextTimeEdgeOK
+ if self.audiocurtime == None:
+ self.audiocurtime = 0
+ tv = self.audiomedia.GetMediaNextInterestingTimeOnly(flags, self.audiocurtime, 1.0)
+ if tv < 0 or (self.audiocurtime and tv < self.audiocurtime):
+ return self._audiotime_to_ms(self.audiocurtime), None
+ h = Res.Handle('')
+ desc_h = Res.Handle('')
+ size, actualtime, sampleduration, desc_index, actualcount, flags = \
+ self.audiomedia.GetMediaSample(h, 0, tv, desc_h, nframes)
+ self.audiocurtime = actualtime + actualcount*sampleduration
+ return self._audiotime_to_ms(actualtime), h.data
+
+ def ReadVideo(self, time=None):
+ if not time is None:
+ self.videocurtime = time
+ flags = QuickTime.nextTimeStep
+ if self.videocurtime == None:
+ flags = flags | QuickTime.nextTimeEdgeOK
+ self.videocurtime = 0
+ tv = self.videomedia.GetMediaNextInterestingTimeOnly(flags, self.videocurtime, 1.0)
+ if tv < 0 or (self.videocurtime and tv <= self.videocurtime):
+ return self._videotime_to_ms(self.videocurtime), None
+ self.videocurtime = tv
+ moviecurtime = self._videotime_to_movietime(self.videocurtime)
+ self.movie.SetMovieTimeValue(moviecurtime)
+ self.movie.MoviesTask(0)
+ return self._videotime_to_ms(self.videocurtime), self._getpixmapcontent()
+
+ def _getpixmapcontent(self):
+ """Shuffle the offscreen PixMap data, because it may have funny stride values"""
+ rowbytes = Qdoffs.GetPixRowBytes(self.pixmap)
+ width = self.videodescr['width']
+ height = self.videodescr['height']
+ start = 0
+ rv = ''
+ for i in range(height):
+ nextline = Qdoffs.GetPixMapBytes(self.pixmap, start, width*4)
+ start = start + rowbytes
+ rv = rv + nextline
+ return rv
+
+def reader(url):
+ try:
+ rdr = _Reader(url)
+ except IOError:
+ return None
+ return rdr
+
+def _test():
+ import img
+ import MacOS
+ Qt.EnterMovies()
+ fss, ok = macfs.PromptGetFile('Video to convert')
+ if not ok: sys.exit(0)
+ path = fss.as_pathname()
+ rdr = reader(path)
+ if not rdr:
+ sys.exit(1)
+ dstfss, ok = macfs.StandardPutFile('Name for output folder')
+ if not ok: sys.exit(0)
+ dstdir = dstfss.as_pathname()
+ num = 0
+ os.mkdir(dstdir)
+ videofmt = rdr.GetVideoFormat()
+ imgfmt = videofmt.getformat()
+ imgw, imgh = videofmt.getsize()
+ timestamp, data = rdr.ReadVideo()
+ while data:
+ fname = 'frame%04.4d.jpg'%num
+ num = num+1
+ pname = os.path.join(dstdir, fname)
+ print 'Writing', fname, imgw, imgh, len(data)
+ wrt = img.writer(imgfmt, pname)
+ wrt.width = imgw
+ wrt.height = imgh
+ wrt.write(data)
+ timestamp, data = rdr.ReadVideo()
+ MacOS.SetCreatorAndType(pname, 'ogle', 'JPEG')
+ if num > 20:
+ print 'stopping at 20 frames so your disk does not fill up:-)'
+ break
+ print 'Total frames:', num
+
+if __name__ == '__main__':
+ _test()
+ sys.exit(1)
+