Choppy playback after rendering clips with movement

escher303
escher303 Posts: 28 Just Starting Out*

I've been seeing this for a long time, loss of smoothness from original clip after rendering.

Setup spec:-

  • Hitfilm Pro 16
  • Original clips shot on Canon DSLR 30fps h.264
  • Project set at 1080P 30 fps
  • PC spec AMD 2700X, 16 GB Ram, SSD, NVIDIA GTX 1650
  • Rendered to 1080P MP4, 720 MP4, Instagram MP4

Example:-

What I've tried:-

  • I've rendered to 1080P, 720P and instagram format and viewed on different viewers, MS Video, MS photos and VLC media player all look the same
  • Tried on HD and SSD and different PC's/Monitors to look for hardware viewing problems
  • Restarted everything several times
  • Tried rendering in different FPS settings
  • No FX applied to clips above but have tried with and without, there's no difference

I don't think it is my hardware struggling to playback. The original .mov plays fine. Whatever frame rate or format I render to the video final looks the same, choppy and loss of smoothness from the original.


Any ideas?

Thank you

Comments

  • triforcefx
    triforcefx United StatesPosts: 1,300 Moderator

    Can you run a MediaInfo report on your original video and post the results here?


  • escher303
    escher303 Posts: 28 Just Starting Out*

    General

    Complete name              : I:\Photo Master Library 12-11-2019\2021-07-06 Sunset TL\MVI_5193.MOV

    Format                  : MPEG-4

    Format profile              : QuickTime

    Codec ID                 : qt  2007.09 (qt /CAEP)

    File size                : 39.0 MiB

    Duration                 : 7 s 708 ms

    Overall bit rate             : 42.4 Mb/s

    Encoded date               : UTC 2021-07-06 21:33:43

    Tagged date               : UTC 2021-07-06 21:33:43


    Video

    ID                    : 1

    Format                  : AVC

    Format/Info               : Advanced Video Codec

    Format profile              : [email protected]

    Format settings             : 1 Ref Frames

    Format settings, CABAC          : No

    Format settings, Reference frames    : 1 frame

    Format settings, GOP           : M=1, N=15

    Codec ID                 : avc1

    Codec ID/Info              : Advanced Video Coding

    Duration                 : 7 s 708 ms

    Bit rate                 : 42.3 Mb/s

    Width                  : 1 920 pixels

    Height                  : 1 080 pixels

    Original height             : 1 088 pixels

    Display aspect ratio           : 16:9

    Frame rate mode             : Constant

    Frame rate                : 29.970 (30000/1001) FPS

    Color space               : YUV

    Chroma subsampling            : 4:2:0

    Bit depth                : 8 bits

    Scan type                : Progressive

    Bits/(Pixel*Frame)            : 0.681

    Stream size               : 38.9 MiB (100%)

    Language                 : English

    Encoded date               : UTC 2021-07-06 21:33:43

    Tagged date               : UTC 2021-07-06 21:33:43

    Color range               : Full

    Color primaries             : BT.709

    Transfer characteristics         : BT.709

    Matrix coefficients           : BT.601

    Codec configuration box         : avcC

  • triforcefx
    triforcefx United StatesPosts: 1,300 Moderator

    Based on this report, your “30 FPS” video is actually 29.97 FPS, which could be causing these issues. The 30 FPS presets in the Project Settings are exactly 30 FPS, rather than the 29.97 NTSC standard. Try changing your Project Settings to the 1080p 29.97 preset.

  • escher303
    escher303 Posts: 28 Just Starting Out*

    Thanks for your help. Now taking a long dive into improving my understanding of FPS and impacts on editing, thanks for the pointer.