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Premiere CC interpreting footage incorrectly, half frame-rate
Hi,
I have four 25fps AVCHD files in a .mov wrapper which I’m trying to edit. When I import them into Premiere the frame rate is interpreted as 12.5. If I force the frame rate as 25, the audio plays back twice the speed. I’m on a deadline so getting slightly worried about this – the files seem dodgy somehow, if I play back in media player or VLC and skip ahead they crash the program. Have tried to edit in CS5 but that’s even worse, the CPU usage goes through the roof and the whole thing grinds to a halt. Any input greatly appreciated.
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7 Replies
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Hi Michael,
Do you have the original folder structure as copied from the camera card, or just the .mov files? Best practice is to copy all files from memory card to hard drive then import using Media Browser in Premiere. Helps Premiere to correctly interpret the video and audio parameters.
If all you have is the .mov clips, can you try transcoding to new clips prior to editing, either using Media Encoder or third-party? There are many free encoders available online if AME doesn’t work with the problem clips.
Thanks
Jeff Pulera
Safe Harbor Computers -
Hi Jeff,
Thanks for the response – I just have the files – they were actually shot by someone else on AVCHD cameras, he uses Final Cut usually so he transcoded to what I thought was Prores but was actually H.264, 1080p 50i, in a .mov wrapper. Which should still be fine with Premiere right? Anyway, I tried re-encoding with AME but again it interpreted the clip as 12.5fps and had the same issue with audio at the wrong speed etc. So I opened the clips in Premiere CS5 instead (which was able to play the clips okay but slowed down horrendously or crashed if any editing was done on them) and re-rendered to MPEG. Not ideal as the quality has been affected but at least I can hopefully edit now. I don’t get what the issue is though, seems very strange…
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You could try this:
Duplicate each video file in the project. Interoperate one at 25fps and leave the other as is.
Take the sound from one and the video from the other and stick them in the timeline to they line up.
Merge them to a new clip.
A bit of a pain but if it works you should be able to use the files without transcoding and the resulting quality loss…
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I’m having the same problem: 29.97 fps is importing as 14.985 (14.99) fps. I need the clips to come in correctly because I’m trying to do a Replace Footage action on a 50m documentary with 40+ minutes of interviews… The new clips have cleaned up audio from Audition, and I need to replace all the instances of edited a/v simultaneously to save me hours of piecework. Thoughts?
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[Joe Weber] “I’m having the same problem: 29.97 fps is importing as 14.985 (14.99) fps.”
We need to know more about the files.
Format, codec, camera, any other programs that have touched them. (You mentioned audition. What exactly did you do?)
If you have a small file that isn’t working that you could dropbox I’d be happy to take a crack at it.
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I believe my problem was due to the use of a variable frame rate (VFR by the affected clips. After using HandBrake to convert the files to constant frame rate (CFR), my issue was resolved.
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You can use AME to do the same, just turn on “Use Frame Blending”.
With worse OIS motion correction, you may want to use AE to interpret or even Twixtor.
I’ve even used a Gaussian blur in for some, and for others I’ve even added a transition at that point to make it pass through without disrupting the flow of the scene. If you only have one or two frames dropped from OIS or whatever reason, then use AME and add frame blending to conform to a set rate without losing the sync.
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