Then I shorten the file to the new real length. When I set the file length in section, the file changes so that it shows the 'extra length' as the start of the file loop. My video decoder priority is mp4 vlc avfoundation ffmpeg qt (default) To save time, space and avoid possible faults etc. So I have a workaround - but I would like to have the mp4 H.264 files work in reaper. I the converted the files to PRoRes 4444 (big!) and to ProRes Proxy 422 (not that big) - and then reaper was able to read the files correctly Here is the information from Reaper on the specific movie: I check the frame rate, I always set my DAW to the same frame rate but it doesn´t have any effect on the filelength. In Nuendo is shows the correct/expected length 2:30.00 The files length is 2:30 also when looking a miliseconds it is 2:30.00

I check the file in (first) Premiere Pro, In VLC, handbrakeQuicktime player etc. I recieve a movie file: Length: 2:30 min. When I recieve these Moviefiles many many times they show up in reaper just a little bit longer than expected. They always loop and always in time with all the other sounddesign/music etc. These are incorporated in some major exhibitions. I make a lot of music and sounddesign for small movies. Sorry for the mess but couldn´t find a way to move the old thread I started this Thread in reapers general question forum - but starting it up again here - video and editing/mangling.

Mp4 davinci resolve media offline