def part3(vedio_path, output_path):
"""
时间轴特效
:return:
"""
print("part3 拼接中---------")
try:
clip = VideoFileClip(vedio_path, audio=False)
modifiedClip1 = clip.fl_time(lambda t: 1.5 * t, ) #倍速
modifiedClip2 = clip.fl_time(lambda t: 2 * t)
modifiedClip3 = clip.fl_time(lambda t: 2.5 * t)
final_clip = clips_array([
[clip, modifiedClip1],
[modifiedClip2, modifiedClip3],
])
final_clip.duration = clip.duration
final_clip.write_videofile(output_path)
final_clip.close()
except Exception:
pass
return output_path
#------------------------------------------------------------------------
# Transform into pairs of (origin_offset, destination_offset)
#------------------------------------------------------------------------
brightnesses = dict([ ("%.2f" % (index / clip.fps), value[0]) for index, value in enumerate(brightnesses) ])
print "Found %f frames" % (clip.fps * clip.duration)
#------------------------------------------------------------------------
# Filter function.
# Need two cases, for video (scalar offsets) and audio (arrays).
#------------------------------------------------------------------------
def remap_time(t):
try:
t0 = t[0]
t1 = brightnesses["%.2f" % t0]
t += (t1 - t0)
except:
try:
t0 = t
t1 = brightnesses["%.2f" % t0]
t += (t1 - t0)
except Exception, e:
print "Exception when reordering: %s" % e
sys.exit(1)
return t
#------------------------------------------------------------------------
# Process the clip.
#------------------------------------------------------------------------
clip_sorted = clip.fl_time(remap_time, apply_to=['mask', 'audio'], keep_duration=True)
clip_sorted.write_videofile(args.output, fps = clip.fps, write_logfile = True, audio_bufsize = int(44100.0 / clip.fps))
def video_preview(source, pipeline):
clip = VideoFileClip(source)
clip = clip.fl_time(lambda t: t + 39)
output = clip.fl_image(pipeline)
output.duration = 5
output.preview()
