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# 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
from Carbon import Qt
from Carbon import QuickTime
from Carbon import Qd
from Carbon import Qdoffs
from Carbon import QDOffscreen
from Carbon 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)
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