[FFmpeg-user] DNxHD 1080p60

[Kasper Folman]

I’ve uploaded sample files from ffmpeg and Adobe media encoder.
It appears that ffmpeg will do the 60fps in a mov container, but not in the MXF container.

So it sound like, as you say, the MXF muxer won’t do it. I don’t know if the MXF container officially does not support 60 fps, but I would guess that it did, since avid has a codec supporting it.

https://wetransfer.com/downloads/9077d8f5f14042dee238f02d0c1dd32020171029122242/a508c1de23f2953e910027763cf8c3eb20171029122242/f7fa77 <https://wetransfer.com/downloads/9077d8f5f14042dee238f02d0c1dd32020171029122242/a508c1de23f2953e910027763cf8c3eb20171029122242/f7fa77>


> On 28 Oct 2017, at 21.31, Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
> 
> 2017-10-27 15:13 GMT+02:00 Kasper Folman <pneu at pneu.dk>:
> 
>> It looks like ffmpeg does not support dnxhd 1080p60 at all.
> 
> Do you have a 1080p60 sample file?
> 
>> The maximum is 1080p59,94. This is the case regardless of the input file.
>> 
>> It states that the format is unsupported:
>> ffmpeg  -i ~/720p25.mov -filter_complex "[0:0]copy[vOut] ; [0:1]pan=1|c0=c0[a1],[0:1]pan=1|c0=c1[a2],[a1][a2]amerge=inputs=2[aOut0]" -map "[vOut]"  -map "[aOut0]" -c:a pcm_s16le -ar 48000 -field_order progressive -c:v dnxhd -b:v 440M -r 60 -pix_fmt yuv422p -f mxf -y ~/test.mxf
> 
> Could you test with mov output?
> 
>> [mxf @ 0x22da340] 1/60 input time base matched 1001/60000 container time base
> 
> You cannot write 60fps with this time base;-(
> 
> I suspect our mxf muxer that overwrites the aspect ratio also
> outsmarts the user wrt the frame rate;-(
> 
> Or maybe the mxf specification does not allow 60fps?
> 
> Carl Eugen
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