Convert NTSC DVD to Raw HEVC File - 29.97 or 23.967 fps?

Question

I want to use FFmpeg to convert an NTSC DVD .m2v file to a raw .hevc file.

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Framerate

Viewing the m2v 's fps properties in different software gives different reports:

Windows         29.97
VLC             29.97
MPC-BE          29.97
Media Info      23.976
Adobe Premiere  23.976
FFprobe         59.94

FFprobe

[streams.stream.0]
codec_name=mpeg2video
codec_time_base=1001/30000
r_frame_rate=60000/1001
avg_frame_rate=30000/1001
time_base=1/1200000
field_order=progressive

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FFmpeg

I'm guessing the original footage before being put on the DVD was filmed at 23.976 .

When converting to .hevc should I be converting down to 23.976 or leave it at 29.97 like the source file?

Script

ffmpeg

-fflags +genpts 

-framerate ntsc 

-i input.m2v 

-c:v libx265 
-preset medium -x265-params "fps=24000/1001"
-pix_fmt yuv420p 

-copyts 
-avoid_negative_ts make_zero 

-vf "fps=24000/1001" 

-f hevc 

output.hevc

Answer 1

The input appears to be 24000/1001 based on the null decode results.

Use

ffmpeg

-fflags +genpts 
-framerate 24000/1001 

-i input.m2v 

-vf "fps=24000/1001,format=yuv420p"

-c:v libx265 
-preset medium -x265-params "fps=24000/1001"

output.hevc

.hevc has no timestamps so copyts / avoid_negative_ts has no relevance.