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F31911627hlee
Known Participant
August 27, 2023
質問

20 milliseconds delay

  • August 27, 2023
  • 返信数 2.
  • 7132 ビュー

Hi, friends. I use Premiere to synchronize audio and video (.avi) and I love this software, but there's a thing bothering me. I noted the sometimes a frame suffers a time variation of 20 milliseconds. The difference is always 20 milliseconds! For example: Before to repair the audio synchronization, I select a frame that begins at 00:03:11:43200. After I synchronize that and several others parts, I return to "frame 00:03:11:43200" in order to see it again, but, now, the same frame begins at 00:03:11:41200! I would like to know why it happens and if is there a way to avoid that variation, since it destroys the confidence on lipsync. Should I use mp4 intead avi?

[url=https://ibb.co/3fR3hyL][img]https://i.ibb.co/3fR3hyL/Adobe-Premiere-Sy.jpg[/img][/url]

Thank you very much in advance.

    このトピックへの返信は締め切られました。

    返信数 2

    R
    Community Expert
    Richard M KnightCommunity Expert
    Community Expert
    August 27, 2023

    It looks like you are working with Audio units, there is a good chance Premiere is going to the nearest viseo frame.

      F
      F31911627hlee作成者
      Known Participant
      August 27, 2023

      I don't understand it. When I revisit  the same frame several times as I continue fixing other parts, it can return to normal or no. I would like to know a way to stop it, since I can't be sure about the timing. If I set some audio 5 miliseconds after the mouth opens, for example, and the same frame now starts 20 miliseconds earlier, sound will be produced 15 miliseconds before the mouth opening. And, sometimes, it returns to original timing when I revisit it. I have no confidence to do the job anymore. Do you have any solution?

      F
      F31911627hlee作成者
      Known Participant
      August 28, 2023

      I think you need to investigate further.

       

      If you are looking to indicate the position of a video frame with audio units, each video frame will cover a range of 41.7 milliseconds. Any position within that range will show that frame.

       

      If you investigate further, find the position of the frame change. The next frame change should be 0.0417 seconds later.

       

      R.


      I don't understand. I always pick the first frame where the mouth opens, no?

      Assuming I picked the first frame (using timeline "audio samples") and put the audio exactly 1 frame after, this frame could last for 0.0417, but it's a fact that audio will appears after mouth opens, no?

      F
      F31911627hlee作成者
      Known Participant
      August 27, 2023

      https://ibb.co/3fR3hyL

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