[FFmpeg-user] DNxHD 1080p60

Carl Eugen Hoyos ceffmpeg at gmail.com
Sat Oct 28 22:31:37 EEST 2017

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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