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Mixed frame rates on time lines

Last post 11-25-2021, 15:10 by torgny. 12 replies.
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  •  11-25-2021, 9:43 818581

    Mixed frame rates on time lines

    Have Sony RX100 5 that produces 4K and 25fps and  a DJI Mavic Pro that produces 4K with 30 fps. Will this mixture on the time line cause any problems. If so, what would I have to do to make it work?
  •  11-25-2021, 9:49 818582 in reply to 818581

    Re: Mixed frame rates on time lines

    There is one way to find out.... take a single clip of both, put them on the timeline. Decide what the frame rate will be, and then export in the format of your choice.

    Then decide if it works on your computer. I've had mixed framerates in the past and have had no problems

  •  11-25-2021, 10:02 818583 in reply to 818582

    Re: Mixed frame rates on time lines

    OK, thanks Tony. I will do some short clips and try this to see if it still looks good. Will come back when done.
  •  11-25-2021, 10:17 818584 in reply to 818583

    Re: Mixed frame rates on time lines

    Yes
  •  11-25-2021, 11:06 818586 in reply to 818584

    Re: Mixed frame rates on time lines

    Fantastic. Done the test of 2 4K clips. One with 25fps and about 50Mbps and one with 29.970fps and 100mbps with out put of 4K 100Mbps of 29.970 and I could see no degradation at all. Thanks again for quick reply Tony.

     

    Edit. Just saw that the setting for the timeline was set to default 29,97fps and NTSC. So I changed it to 25fps PAL and then it got e bit jerkey for the drone clip of 29.97p and 100mbps bit rate. So now I have to check if my drone is set to NTSC or PAL. However I thought that there terms are not used in todays videos.

     

    Would it really make a difference if I use the NTSC final video here in EU today on a TV? Just checked this on the TV and the NTSC 29.97bps was definitely smoother than the PAL setting.

  •  11-25-2021, 13:08 818591 in reply to 818586

    Re: Mixed frame rates on time lines

    It's more a matter of movement inside the image. If the image moves fast or some objects move fast inside the image, mixing framerates may results to some more visible jerkiness.
  •  11-25-2021, 13:20 818594 in reply to 818586

    Re: Mixed frame rates on time lines

    @torgny are you referring to playback on a tv from youtube or a thumb drive. The only way to know if it works on an EU tv is to actually try it. 

    TV's are different from each manufacturer in what they will play. 

    Also, as Saby mentioned, fast moving objects will be jumpy if they were recorded at 30fps and played back at 25/24fps. 

  •  11-25-2021, 13:30 818595 in reply to 818594

    Re: Mixed frame rates on time lines

    Tony P:

    Also, as Saby mentioned, fast moving objects will be jumpy if they were recorded at 30fps and played back at 25/24fps. 

    The same if recorded at 25 fps and exported at 30 fps. No interpolation/extrapolation with Studio. It simply duplicates 1 frame every 5 frames.

  •  11-25-2021, 14:30 818598 in reply to 818591

    Re: Mixed frame rates on time lines

    Hi Saby,

    I saw the difference from the drone flying in about 45km/h over a grass field and it looked smoother when I exported the video in NTSC i.e 29.970fps.on the TV.

  •  11-25-2021, 14:52 818599 in reply to 818594

    Re: Mixed frame rates on time lines

    Yes, I was looking on a 4K Sony TV and I could distinctly see an improvement by exporting to NTSC 29.970 or 30fps. The video I used was the drone moving forward or a grass field. I know that when panning you have to move very slow, otherwise it get jerkey. I could even see the jerkiness on my computer screen, so that's why I tried it on the TV. I also added the video from the Sony camera, but there I did not see any problem with different frame rates. There was nothing moving in that frame more than the drone going forward over a filed. I just wanted to see if there was any difference by adding 2 different cameras and it was no difference at all if I exported in NTSC.

    My result seams to be as follows:

    Drone video is recording in 4K and 30fps and 100Mbps bitt rate in MP4 and H264. The Sony camera records in 25fps and 4K and 100Mbps and MP4. The time line setting in Pinnacle 24U is 4k regular 2D, 4K and 30fps NTSC. The export setting is XAVC S 4K, 30fps and 100Mbps. All with H264. This gave me a smooth movement video on the TV.

     Yes I understand that that fast moving subject or camera movement can be different.

     I was just worried that mixing 2 different frame rates would cause more problem, but it luckily did not do this. 

    Many thanks for all your help and suggestions. 

    Torgny 

  •  11-25-2021, 14:58 818600 in reply to 818595

    Re: Mixed frame rates on time lines

    Tony said: The same if recorded at 25 fps and exported at 30 fps. No interpolation/extrapolation with Studio. It simply duplicates 1 frame every 5 frames.

    So if my Sony camera records in 25fps and I export this in Pinnacle 24U it adds a frame every 5 frames. That I did not know and wondered how that worked. Would this be something that you can actually se in the final video. I did not seam to notice anything.

  •  11-25-2021, 15:02 818601 in reply to 818600

    Re: Mixed frame rates on time lines

    torgny:

    So if my Sony camera records in 25fps and I export this in Pinnacle 24U it adds a frame every 5 frames. That I did not know and wondered how that worked. Would this be something that you can actually se in the final video. I did not seam to notice anything.

    Depending on the motion in the video and the amount of motion blur in the video, it may be more or less noticeable : https://en.wikipedia.org/wiki/Motion_blur

  •  11-25-2021, 15:10 818602 in reply to 818601

    Re: Mixed frame rates on time lines

    Yes, that was what it was like on the old TV box with a cathode ray tube in it and when you looked at a football game. If the ball was very fast it had the comet tail after it.
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