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Changing Frame-Rate
Hi…
I have to change the frame-rate on some DSLR footage. I did a search on the Adobe site and there are some basic instruction (see below). I had to do this in Final Cut a couple times, and I was able to conver ad keep the audio at 100%. Does Adobe work the same way? Does anyone know of a more detailed workflow?
================Change the frame rate of clips:
You can use the Interpret Footage command to change the frame rate that Premiere Pro assumes for a clip. When changing the frame rate of a clip, audio is changed, in addition to the video. Changing the frame rate changes the original duration proportionally. For example, if you set a 10-second, 24-fps clip to 48 fps, it becomes half as long, with a new duration of 5 seconds. Clip frame rate is reconciled with the sequence frame rate. For example, if you change a 24-fps clip in a 24-fps sequence to 48 fps, the sequence displays only every other frame of the clip.You can also change clip speed and duration by choosing the Clip > Speed/Duration command for a clip selected in a Timeline panel. However, such a change affects only that clip instance in a Timeline panel. Using the Interpret Footage command changes how a file is interpreted throughout a project.
In the Project panel, right-click the desired clip.
Select Modify > Interpret Footage, and do one of the following:
Select Use Frame Rate From File,
Select Assume This Frame Rate, and type the number of frames per second.
Click OK.Frank Giardina
17 Video Production -
2 Replies
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Premiere isn’t as complicated as Final Cut in this regard. You have to ask yourself:
1. Do I want the speed to remain the same?
2. Do I want to change the playback rate because I was shooting with slow motion or fast motion in mind?The answer to the first is easy. Say you have a piece of footage at 23.976 and you want it to be 29.97. Drop the clip onto a 29.97fps timeline and you’re done. Premiere will auto conform. Sure there will be some slight artifacting from the change (frames will either be repeated or blended, but Premiere does a decent job) but it’s decent enough that you usually don’t have to resort to more esoteric ways of converting framerates, say, in After Effects (using Twixtor or Timewarp, as both have optical flow resampling)
The answer to the first is as you describe in your opening post. Interpreting footage using the Interpret Footage command changes the speed of the clip, it’s native playback speed. Probably not as useful as the first solution but if you use it in conjunction with a good speed changing plugin once it’s on the timeline you might find the motion artifacting to be more pleasing.
Angelo Lorenzo
Fallen Empire Digital Production Services – Los Angeles
RED transcoding, on-set DIT, and RED Epic rental services
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A blog dedicated to filmmaking, the RED workflow, and DIT tips and tricks -
Thanks Angelo… I’ll check it out 🙂
Frank Giardina
17 Video Production
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