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• Revision 16718 : Planar YUV 4:2:0, 12bpp, full scale (jpeg) looks better than Planar YUV ...

  23 novembre 2009, par j — Log

  Planar YUV 4:2:0, 12bpp, full scale (jpeg) looks better than Planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples).

• Revision 38130 : Oups on a viré l’enregistrement de el.field_lang[’full’] donc on ne doit ...

  10 mai 2010, par kent1@… — Log

  Oups on a viré l’enregistrement de el.field_langfull ? donc on ne doit pas repasser par là

• UserWarning : x bytes wanted but 0 bytes read at frame index y (out of a total z frames), at time q sec. Using the last valid frame instead

  9 juillet, par Wiz

  I have a script which subclips a larger video and then stitches needed parts together using concatenate and write video file in moviepy. But the problem is everytime i run the script i get the video but the audio is off sync, usually the audio starts normally, but over time becomes delayed. I suspect it is because i want to concatenate around 220 smaller mp4 videos into one big mp4 video, but every smaller clips receives the error :'UserWarning : In file test.mp4, 1555200 bytes wanted but 0 bytes read at frame index y (out of a total y+1 frames), at time x sec. Using the last valid frame instead.'

  


  I use moviepy v2

  


  MY CODE (it doesnt produce any strict errors, but does give the aformentioned UserWarning when writing video_unsilenced.mp4) :

  


  n = 0

cuts = []
input_paths = []
vc = []
os.makedirs(r"ShortsBot\SUBCLIPS")
for timer in range(len(startsilence)-1):
   w = VideoFileClip(r"ShortsBot\output\cropped_video.mp4").subclipped(endsilence[n],(startsilence[n+1]+0.5))
   w.write_videofile(r"ShortsBot\SUBCLIPS\video" + str(n) + ".mp4")
   a = VideoFileClip(r"ShortsBot\SUBCLIPS\video" + str(n) + ".mp4")
   vc.append(a)
   n+=1

output_fname = "video_unsilenced.mp4"
clip = mpy.concatenate_videoclips(clips=vc, method= 'compose')
clip.write_videofile(filename=output_fname, fps=30)
_ = [a.close() for a in vc]


  


  Because moviepy is shaving off a frame or two for every video clip and at the same time writing the audio of the concatenated clip normally (without shaving off the audio that is in the missing frames), the video and audio slowly become out of sync.And the more clips i want to concatenate, the more the audio becomes out of sync, basically confirming my suspicion that it is because moviepy is using the last valid frame and writing the audio normally. The question i have is how can i fix this ?

  


  EDIT : Full error message (although this error message appears after every clip that needs to be concatenated, usually, just like in this error message, its one or two frames that are invalid) : C :\Users\user\miniconda3\envs\myenv\Lib\site-packages\moviepy\video\io\ffmpeg_reader.py:190 : UserWarning : In file C :\Users\user\Desktop\File\Subclips\video317.mp4, 1555200 bytes wanted but 0 bytes read at frame index 99 (out of a total 100 frames), at time 3.30/3.34 sec. Using the last valid frame instead.