[FFmpeg-user] dv => mp4: deinterlace or not, and how?

[Herve Flores]

Le 9 mai 2011 à 17:44, Tim Nicholson a écrit :

> On 09/05/11 10:14, bouke wrote:
>> 
>> ----- Original Message -----
>> From: "Tim Nicholson"<tim.nicholson at bbc.co.uk>
>> To: "FFmpeg user questions and RTFMs"<ffmpeg-user at ffmpeg.org>
>> Sent: Monday, May 09, 2011 10:29 AM
>> Subject: Re: [FFmpeg-user] dv =>  mp4: deinterlace or not, and how?
>> 
>> 
>>> On 09/05/11 09:02, Bouke wrote:
>>>> 
>>>> ---- Original Message -----
>>>> From: "Tim Nicholson"<tim.nicholson at bbc.co.uk>
>>>> To: "FFmpeg user questions and RTFMs"<ffmpeg-user at ffmpeg.org>
>>>> Sent: Monday, May 09, 2011 9:57 AM
>>>> Subject: Re: [FFmpeg-user] dv =>   mp4: deinterlace or not, and how?
>>>>> [..]
>>>>> But what I would really like is to go from 720p50 to 576i25 (SD) ;)
>>>> 
>>>> Tim,
>>>> You know that AE can do this?
>>>> (Perhaps you don't like the downscaler in AE, but it is a handy tool to
>>>> split fields to frames and vice versa, and it can be scripted)
>>>> 
>>> [...]
>> 
>> Ok, you want cheap, you get cheap.
> 
> Not so much that as not using a sledgehammer.
> 
> It has been pointed out to me that the tinterlace filter in mplayer can make a useful nutcracker in this case (with a tweaked version in ffmbc).
> 
> 
>> Found a way with QT to do it.
> > [...]
>> Pick one of the two and apply a interlaced key signal as mask.
>> (One line black / white alternating)
> >...]
> 
> Now that is a goldie oldie. Somewhere I still have a field test image with field one lines all red and field two all blue. Great for spotting dominance changes but not so good for the eyes if you freeze frame instead of freeze field...:(

…was maybe mine ;-)
the aim of this stupid video was to test how each flat screen TV handles interlacing, and what they do with chroma (eg: if the TV displays a violet screen, it does a bad job with chroma ;-))
I made a "stupid DVD-VIDEO" for friends, it's still available here <http://www.movieconverter-studio.com/_PUBLIC/dvd576i50.zip>
PS: I'm french, so the caption onto the video means: "What color do you see?"

bye

Hervé