I'm new here.

I have a set of TIF frames that equal 1 minute and 25 seconds of a video.

I'm attempting to copy the frames without re-encoding using the "-c:v copy" function to avoid visible quality loss for a process I'm doing on my side. The command is as follows:

ffmpeg -r 23.977 -i d.tif -c:v copy out.mkv

However for some reason, the timing does not seem to be accurate and the video is slightly desynced from the original, ending at 1 minute and 22 seconds instead.

When I use the following command:

ffmpeg -r 23.977 -i d.tif out.mkv

It comes out with the proper timing at 1 minute and 25 seconds, however, I did not appreciate the quality loss that came with it.

Is there a workaround to this or is there something I'm missing?

I used both Command Line and Windows Terminal.

CodePudding user response：

In general, it would make sense to transcode when you go from tiff to video format. (I'm surprised it actually works.) You can set encoding quality to your own liking. See [this FFmpeg Wiki article[(https://trac.ffmpeg.org/wiki/Encode/H.264).