10 Replies Latest reply on Jun 16, 2018 2:59 PM by rodneyb56060189

    Reducing Frame Rate


      I'm shooting a walkthrough tour video of a building, and shot it at 60 fps with 1/125 shutter speed. The reason is I knew I wanted to slow down certain shots, kind of like MTV Cribs style. I'm now starting to kick myself for shooting in 60 fps because I feel it may not look as professional. This is one of my first videos so I'm really concerned with the result.  My thought process pre shooting was I could always convert it to 30 fps by either exporting it that way or changing the timeline to 30.


      I'm now realizing that it doesn't look as great when I do so because I shot at 1/125 shutter instead of 1/60, which wouldve been optimal for 30 fps. Is there anything I can do to drop the frame rate to 30 without losing quality due to the high shutter speed? Will time interpolation settings like frame blend help in this case?



        • 1. Re: Reducing Frame Rate
          Kevin-Monahan Adobe Employee

          Hi AdamF,

          Can you upload a small sample somewhere so we can inspect it and to help you find a solution?



          • 2. Re: Reducing Frame Rate
            Jim_Simon Level 9

            30 doesn't look all that "professional" either.  You really need to be shooting at 24 fps with a 1/50 shutter to get that "professional" film look.

            • 3. Re: Reducing Frame Rate
              nickw95539103 Level 1

              Agreed on the above comment. 30fps looks very strange, like an early 90's camcorder or something. The brain processes 24fps most easily so it looks the best. Nearly everything in Hollywood is shot at 24fps. Next time I'd shoot at 120fps, not 60fps. It will give you a buttery smooth slow-mo that just looks great.


              So, if you go to your clips in the project panel, click the first one, hold shift and click the last one, this will select them all. Then right click on them and go to MODIFY. Modify will give you the option to INTERPRET FOOTAGE. Click this and it will bring up another screen. At the top there are two options: Use Frame Rate from File; Assume this Frame Rate. Choose the Assume the Frame Rate option and in the small bar next to it, type in 30.00

              You can also put in 24.00 but it may not come out perfect. Try it out.


              If you want to slow down some parts still to make it look stylized and cool, follow this video. It really helped me and I got some sweet footage because of it.


              How using a SPEED RAMP can IMPROVE your videos!! - YouTube


              Good luck!

              • 4. Re: Reducing Frame Rate
                rodneyb56060189 Level 4

                Many TV commercials (broadcast at 30 fps ) look very good to most people. It can be argued some stuff shot at 30fps to be transferred 1:1 ( one frame film to one frame broadcast ( two fields per frame)) look pretty nice.


                This TV commercial was shot mostly at 30fps, but some was shot higher for the slow motion (which ultimately is 30fps broadcast).


                Is nice donkey commercial.


                Budweiser Donkey - Stefan Czapsky


                I think the interpret footage thing to 30 should look fine for you. It has nothing to do with exposure at 60. That's already a done deal.

                • 5. Re: Reducing Frame Rate
                  rodneyb56060189 Level 4

                  I think your problem is that you shot 60 without wanting it to be slow motion, so now you have to drop every other frame to get 30, but it shouldn't be terrible (hopefully ).

                  • 6. Re: Reducing Frame Rate

                    Thanks everyone. My main concern is that I shot with a shutter speed of 1/125 which is optimal for 60 FPS,  so if I convert it to 30 FPS the shutter speed of 1/125 will make it look weird. I’m fairly new to this so I honestly can’t tell if it looks weird, but logically speaking I feel like it’s a possibility.


                    if that’s the case then converting to 25fps would be Even more off regarding shutter speed.


                    The irony is i ended up Not using slow mo once so far lol.

                    • 7. Re: Reducing Frame Rate
                      rodneyb56060189 Level 4



                      Your original footage at 60 and 120 is your exposure (along with F stop and ISO ). It is done. Like, you took a picture and it came out nice and you like it.


                      Now, changing the FPS has nothing to do with what you previously used for shutter speed or F stop or ISO. That is a product you already made and has no bearing on what you do to change the FPS etc.


                      Imagine taking a picture with a still camera at an ISO of 100, F stop of 8, and shutter speed of 125. You print that picture on paper. You like the way it looks (exposure is nice ).  So that's what you have. It's a final product, on paper that you like.


                      Changing FPS in editor uses that same nice picture and nice exposure and just drops every other frame to 30 FPS without having anything to do with what you did before to get nice exposure.


                      So, let's say you take 60 photos of some action. All frames look nice with nice exposure.  And now you take every other photo OUT of the sequence. That's what you are doing. I has nothing to do with what you did before re: shutter speed.


                      ???? does that make sense ??

                      • 8. Re: Reducing Frame Rate
                        rodneyb56060189 Level 4

                        final note:


                        the shutter speed DOES effect how motion is captured re: blurry or sharp. At 120 pics will capture motion without as much blur as 1/48th ( or 50th of sec which DSLR's have ). That is the only difference.


                        I just asked someone what is being used for broadcast of Quantico and Shades of Blue and it is 23.97, much to my disappointment. I am now going to hide under blankets and read books and admit there are strange things going on. Why someone would add frames to broadcast 30 ( six frames per sec difference) is beyond me.


                        : (

                        • 9. Re: Reducing Frame Rate
                          afkvisuals Level 1

                          I definitely get what you’re saying regarding exposure. My concern was with the motion blur aspect like you mentioned. 1/125 shutter speed isn’t the proper amount of motion blur for 30fps, so I wasnt sure if my footage concerted to 30fps with 1/125 shutter speed would look off

                          • 10. Re: Reducing Frame Rate
                            rodneyb56060189 Level 4

                            depends what you shot. If you shot running horsies then they move fast and blur would be pronounced. If you shot someone standing still and talking the blur would be negligible or non existent. You'll find out when you've completed it. There's nothing wrong if it looks OK to you.


                            : )