[SOLVED] ffmpeg / handbrake different results

I use ffmpeg (Version 4.2.4) and HandBrakeCli (Version 1.3.1) but they produce slightly different aspect ratios for the encoded output, here's the relevant info:

Input vob file (from a dvd) 

FFprobe of the vob file:
ffprobe: Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, top first), 
720x576 [SAR 16:15 DAR 4:3], 4000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
 

ffmpeg process
=========
The command:
ffmpeg -i V/Title-9.vob -vf yadif -crf 28 -c:v libx265 -preset medium ff-09.mp4

ffprobe of the output:
Stream #0:0(und): Video: hevc (Main) (hev1 / 0x31766568), yuv420p(tv, progressive), 
720x576 [SAR 16:15 DAR 4:3], 567 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)



HandBrakeCli process
==============
The command:
 HandBrakeCLI -i V/*.iso -t 9 -e x265 --x265-preset medium  -2 -T -q 28 -d -m -o hb-09.mp4


 ffprobe of the output:
Stream #0:0(und): Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, smpte170m/bt470bg/bt709), 
700x576 [SAR 16:15 DAR 35:27], 549 kb/s, 24.99 fps, 25 tbr, 90k tbn, 25 tbc (default)

I can see that HandBrake works out the DAR values differently from the vob file.



The question is what settings do I need to get HandBrake to preserve the aspect ratio? I don't want to enter the width and height, I'd rather HandBrake did this for me. I've tried the obvious like --keep-display-aspect and other flags but to no affect.

On my system, handbrake doesn't even depend on ffmpeg, so it's not surprising that results differ slightly.
Not getting the aspect ratio right despite "--keep-display-aspect" is more than lightly, though. Maybe the pixel aspect is not 1:1?

Originally Posted by ondoho On my system, handbrake doesn't even depend on ffmpeg, so it's not surprising that results differs lightly. Not getting the aspect ratio right despite "--keep-display-aspect" is more than lightly, though. Maybe the pixel aspect is not 1:1?

On my system as well, HandBrake doesn't depend on ffmpeg - both run independently

Handy as HandBrake Cli is, I'm going to stick with using dvdbackup to extract the titles, and ffmpeg to encode to mp4.