Deinterlacing by scaling 0.5 and doubling fps

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Oliver Seitz pisze:
>> Hello,
>>
>> I was wondering: when a film is recorded by a camera in 25 fps
>> interlaced, actually every other line is updated 50 times per second.
>>
>> So, since I want to scale the film by 0.5 anyway, I could gain 50 fps on
>> the way. Gaining fps is valuable to me, as I am going to play the film
>> in slow motion.
>>
>> So my question is, how can this be done using mplayer/mencoder?
>>     
>
> With -vf tfields
>
> The result even looks far better than I expected.
>   
Thanks, that's exactly what I was looking for; I was expecting good
results and am not disapointed.

I tried this on two different film formats, and it did not work without
additional options.

1) MPEG-TS 1920x1080: I used these options: mencoder -vf tfields
-demuxer lavf -mc 0 -noskip
It turned out to be an excelent conversion of *.MTS files to a playable
format.

2) For MPEG-PS 720x576: I used these options: mencoder -vf tfields -fps 50

Results are great.

Cheers
Kristo


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