[FFmpeg-user] Detelecine: I got the right result from the wrong command?

[Alex Xu]

And one quick note, my external video player (IINA and VLC) seems to not
like it if I don't include "-pix_fmt yuv420p" Otherwise I get strange
screen tearing issues.

On Wed, May 28, 2025 at 9:30 PM Alex Xu <alexkurosakimh3 at gmail.com> wrote:

> I tried running your exact command and got the same result. Dropped frame
> 173 and a later duplicated frame.
>
> I've attached 15 frames here of the results.
>
>
> https://drive.google.com/drive/folders/139rjLqsxIuAO_3yzVNe4dD7-gI9YPRgn?usp=drive_link
>
> I've attached 5 frames each of the original input, using detelecine, and
> using fieldmatch+decimate with your command.
>
> The 2nd frame of the original input was skipped with fieldmatch+decimate.
> The frames are similar looking, but the character is a lot more blurry and
> the sword is at a different angle.
>
> Specifically detelecine2.png was skipped in fieldmatch+decimate.
>
>
>
>
>
>
> On Wed, May 28, 2025 at 7:35 PM Mark Filipak <markfilipak.imdb at gmail.com>
> wrote:
>
>> I did this:
>>
>> ffmpeg^
>>   -i g:\detelecine_input.mkv^
>>   -vf fieldmatch,decimate^
>>   -c:a aac^
>>   -c:v libx264^
>>   g:\fieldmatch_decimate_only_no_r.mkv
>>
>> I couldn't get the frame numbers burned into the pictures, so I counted
>> them as I single stepped.
>>
>> There were no dropped frames. There were no repeated frames.
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>