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