def get_synced_timings(self, slide_data):
logger.debug("Loading files %s and %s" % (self.original_video_file, self.slide_video_file))
# Load audio files first
original_audio, original_file_sr = utils.get_audio_from_file(self.original_video_file)
logger.debug("Loaded original file %s, preprocessing...", self.original_video_file)
original_audio, original_sr = sync.preprocess_audio(original_audio, original_file_sr, bandpass=False)
logger.debug("Done.")
slide_audio, original_slide_sr = utils.get_audio_from_file(self.slide_video_file)
logger.debug("Loaded slide file %s, preprocessing...", self.slide_video_file)
slide_audio, slide_sr = sync.preprocess_audio(slide_audio, original_slide_sr, bandpass=False)
logger.debug("Done.")
assert original_file_sr == original_slide_sr
logger.debug("Load done, calculating sync timings...")
if self.global_method:
updated_slides = self._get_synced_timings_global(slide_data, original_audio, slide_audio, slide_sr)
else:
updated_slides = self._get_synced_timings_local(slide_data, original_audio, slide_audio, slide_sr)
assert len(updated_slides) > 0
if updated_slides[0][0] > 0:
# Pull down first slide to 0 if all slides are positive
updated_slides[0] = (0, updated_slides[0][1])
else:
# Pull up incoming slide if there are negatively timed slides
zero_index = bisect.bisect_left([time for time,image in updated_slides], 0)
assert zero_index > 0
updated_slides[zero_index - 1] = (0, updated_slides[zero_index - 1][1])
return updated_slides
def work(f1, f2):
print "Loading first audio..."
file1_audio, file1_orig_sr = utils.get_audio_from_file(f1)
print "Preprocessing first audio..."
file1_audio, file1_sr = sync.preprocess_audio(file1_audio, file1_orig_sr, bandpass=False)
print "Loading second audio..."
file2_audio, file2_orig_sr = utils.get_audio_from_file(f2)
print "Preprocessing second audio..."
file2_audio, file2_sr = sync.preprocess_audio(file2_audio, file2_orig_sr, bandpass=False)
print file1_sr, " - ", file2_sr
global_offset = correlate.get_offset(file1_audio, file2_audio, file1_sr)
print "Found offset", global_offset
def find_offset(target, source, source_offset):
"""
Finds piece of source file around source_offset in target file
target - File in which to match the piece (file path or (numpy array, samplerate) tuple of preprocessed samples)
source - File to extract piece of file from (file path or (numpy array, samplerate) tuple of preprocessed samples)
source_offset - offset of piece of interest in source file (in seconds)
Returns offset in target file in seconds
"""
if isinstance(target, basestring):
logger.debug("Target file passed as filepath, loading...")
target_audio, target_samplerate = utils.get_audio_from_file(target)
target_audio, target_samplerate = preprocess_audio(
target_audio, target_samplerate)
logger.debug("Loaded.")
else:
target_audio, target_samplerate = target
if isinstance(source, basestring):
logger.debug("Source file passed as filepath, loading...")
source_audio, source_samplerate = utils.get_audio_from_file(source)
source_audio, source_samplerate = preprocess_audio(
source_audio, source_samplerate)
logger.debug("Done.")
else:
source_audio, source_samplerate = source
assert target_samplerate == source_samplerate
# Take 20 second stretch of audio to look for correlation
start_index = max(0, (source_offset * source_samplerate) -
((WINDOW_SIZE * source_samplerate) / 2))
end_index = min(
len(source_audio) - 1, (source_offset * source_samplerate) +
((WINDOW_SIZE * source_samplerate) / 2))
source_slice = source_audio[start_index:end_index]
offset, correlation = correlate.get_offset(source_slice, target_audio,
source_samplerate)
return offset
