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  1. I am using ffmpeg to convert h264 and h265 from my cameras to Prores and DNxHR. Does anyone know what the maximum supported frame rates are when encoding to Prores and DNxHR? I read DNxHD only goes to 60fps. But what is the limit for Prores and DNxHR? Is is 120fps?
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  2. I just ran a test with ffmpeg. Prores had no problems encoding an 8 bit, 960 fps, 7680x4320 video.

    Code:
    ffmpeg -i input.avs -vcodec prores_ks -profile:v hq -quant_mat:v hq -pix_fmt yuv422p10le -vf zscale=matrixin=709:matrix=709:transferin=709:transfer=709:primariesin=709:primaries=709 "output.mov"
    Code:
    General
    Complete name                            :output.mov
    Format                                   : MPEG-4
    Format profile                           : QuickTime
    Codec ID                                 : qt   0000.02 (qt  )
    File size                                : 1.43 GiB
    Duration                                 : 106 ms
    Overall bit rate mode                    : Variable
    Overall bit rate                         : 116 Gb/s
    Writing application                      : Lavf58.20.100
    
    Video
    ID                                       : 1
    Format                                   : ProRes
    Format version                           : Version 0
    Format profile                           : 422 HQ
    Codec ID                                 : apch
    Duration                                 : 106 ms
    Bit rate mode                            : Variable
    Bit rate                                 : 117 Gb/s
    Width                                    : 7 680 pixels
    Height                                   : 4 320 pixels
    Display aspect ratio                     : 16:9
    Frame rate mode                          : Constant
    Frame rate                               : 960.000 FPS
    Color space                              : YUV
    Chroma subsampling                       : 4:2:2
    Scan type                                : Progressive
    Bits/(Pixel*Frame)                       : 3.676
    Stream size                              : 1.43 GiB (100%)
    Writing library                          : Lavc
    Language                                 : English
    Color primaries                          : BT.709
    Transfer characteristics                 : BT.709
    Matrix coefficients                      : BT.709
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  3. wow I did not know Prores went as high as 960 fps - is this the case for all profiles and resolutions? I remember seeing some documentation saying Prores only went to 120fps, so it's great it goes a lot higher.

    What about DNxHR? Any idea what the maximum is with that?
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  4. Originally Posted by david151 View Post
    wow I did not know Prores went as high as 960 fps - is this the case for all profiles and resolutions?
    I don't know. I just ran the one quick test with the outrageous frame size/rate using a command line I used in the past.

    Originally Posted by david151 View Post
    What about DNxHR? Any idea what the maximum is with that?
    No idea.
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  5. I suspect it's ffmpeg which allows you such a high fps, but I guess it's outside of the official spec for the codec?

    I would be interested to see if DNxHR could also work with such high frame rates if using ffmpeg. I am away from home at the moment, so can't do any tests. But would be interested to hear if anyone does any experiment with DNxHR
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  6. Even if the software you're using doesn't allow for higher frame rates you can always lie to the encoder and tell it the frame rate is lower, then change the frame rate back up in your editor. Ie, tell the encoder your 120 fps video is 60 fps. Then tell your editor the 60 fps video is really 120 fps when you import it.
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