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J
Jan293116967bfo
Participant
April 8, 2023
Question

When replacing footage, all clips are delayed

  • April 8, 2023
  • 4 replies
  • 487 views

Hi

I have an already edited montage, but now I managed to get higher quality footage.

Before I started editing I converted an mkv file to mp4 using vlc's built in converter, but now I've come to realize that If I want the best quality, I should convert it using ffmpeg. And that's what I did.

But If I try to replace the footage now, with the higher quality ffmpeg version, all the clips are somehow delayed by a few seconds.

From my quick test it seems the "contents" of the clips are about 7 seconds behind, but the clips themselves are in the same position and are the same length. I can't for the life of my figure out why.

All help is appreciated, thanks!

This topic has been closed for replies.

4 replies

R
Community Expert
Richard M KnightCommunity Expert
Community Expert
April 9, 2023

Is the transcoded file the same length as the original, put them both on a new timeline and compare.

B
Baffy19
Legend
April 9, 2023

@Richard M Knight 

" From my quick test it seems the "contents" of the clips are about 7 seconds behind, but the clips themselves are in the same position and are the same length. I can't for the life of my figure out why".

 

Here is the answer to your suggestion.

B
Community Expert
Byron CortezCommunity Expert
Community Expert
April 9, 2023

Or possibly when transcoding with ffmpeg you didn't do it with the same framerate as the original clips. Make sure you have transcoded to exactly the same framerate and that it is constant (CFR). 

Byron.
B
Community Expert
Byron CortezCommunity Expert
Community Expert
April 9, 2023

You could try clearing the disk cache from the Premiere Pro preferences. 

Byron.
B
Baffy19
Legend
April 8, 2023

 @Jan293116967bfo  Perhaps when encoding the material, you did not take into account the bitrate setting. In the settings of the program through which you encode, check whether the bitrate is variable or constant. You need a constant bitrate. Try again. Otherwise, use Hand Brake to encode into the format .MP4. There is such a possibility.

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