Does anyone know if there is a fix for the 23.98 fps problem in Adobe Premiere? For those of you who are not familiar with the problem, let me explain. When viewing/editing video that has been inverse telecined the frame rate should be 23.976 fps. When you import such a video into Adobe Premiere 6.0 or 6.5, the closest frame rate that you can select is 23.98 fps. Now some might think that 23.98 is just an abbreviation of 23.976 but Premiere truly does play it back at exactly 23.98 fps. So the video ends up being played back .004 fps faster which means that at the end of a 2 hour clip, the audio is out of sync by about 1.4 seconds. I wanted to see if anyone knew of any patches/plug-ins/fixes/work-arounds for this problem.
Install Avisynth. Create a file with the extension *.avs. Put these two lines in it. avisource("aviname.avi") assumefps(24) Then try to open it in premiere. According to the docs not only does Avisynth play the clip back at 24fps. But it says the audio is also resampled to match. So it should not loose synch. Just play faster. It indeed seems to work. Give it a shot. Nothing to loose eh?
What timing! Just today I was trying to figure out this very problem and I came up with a perfect fix. First of all, in your project settings, it should be set for 23.98 fps, and it should be set for "no fields" under the keyframe and rendering settings. Now, when you go to export your video, export it at 29.97 fps. Next, make an avisynth script and load in that video, and use the decomb filter with just the Decimate() command. This will result in a 23.976 fps video stream. I compared the two (the 29.98fps and the 23.976fps vids) in virtualdub, and they were frame for frame identical, except the 28.98fps version had an extra frame every so often (as it should).
If I understand the original question, and it is simply a matter of an incorrect value, why not use VirtualDub, or any of the other "fps" tools, to set the frame rate to the correct value? VirtualDub even has a setting to match the framerate to the audio length.
Thank you for your posts everyone. Neo Neko... That's a good idea but unfortunately the audio is in a separate file than the AVI video. I am actually editing DVDs and to edit them I am decoding the Dolby AC3 files into 6 separate WAV files so that when I edit out bad language I only cut the center channel and all of the background noise is still present. Zarxrax... Interesting method... I think I see what you are getting at. But how does Premiere handle the change of frame rate? Does Premiere really have the ability to export to 29.97 fps from a 23.976 fps source? Does it just add extra frames to compensate? Certainly it wouldn't do a pulldown on it. I didn't think it could do that. Anyway, I will try it though because if it does just add frames that I could easily remove later, I think that would fix it. Thanks. mpucoder... Well the AVI file that I have IS set to the correct fps value of 23.976 fps. It's just that Premiere interprets it as 23.98 as it is the closest setting in the software. I guess it would usually re-sample the audio to match but in my case the audio channels are in 6 separate files that it couldn't match up with the video. I don't think I could use VirtualDub to try and sync the audio with the video file either because on this DVD, the audio ends before the video does. The Video lasts about 3-4 seconds longer of just blank video and the WB symbol. But to get past the problem in the mean time, I have re-sampled the 6 audio files in Cool Edit to shorten them by 1.4 seconds to get them back in sync. The only thing is this is a very time consuming process that I wish I didn't have to do, which is why I am bringing up this whole topic anyway. Thanks again to all of you! Any more ideas would still be helpful!
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RE: Premiere 23.98/23.976 frame rate problem
