[FFmpeg-user] DV to bob deinterlaced HEVC

Matti Haveri matti.haveri at gmail.com
Sun Nov 15 15:30:18 EET 2020

On Sun, Nov 15, 2020 at 2:00 PM adam smith via ffmpeg-user <
ffmpeg-user at ffmpeg.org> wrote:
>> 25fps vs 50fps difference is there but not so great as I expected.
> You might find that ffmpeg is duplicating each deinterlaced frame to
> output 50fps from the 25fps source.

Most of the footage was interlaced and the .mp4 output had
unique frames.

There were a only a few scenes where the camcorder's shutter speed was
slower than 1/25s so those parts were progressive i.e. no comb lines
in original .dv files and there were duplicate frames in the .mp4

I also tried to disable all motion smoothing options off in the
television while evaluating the quality. I also compared two
windows on a computer monitor.

yadif and bwdif were set to output one frame for each field. I found
bwdif somewhat better than yadif which leaves some minor "ripple"
artifacts to the movie.

BTW, I guess I could skip scaling and set the output .mp4 pixel aspect
ratio the same as in the input PAL .dv 128/117 but I prefer to convert to
square pixels.

- Matti

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