[FFmpeg-user] ntsc-dvd doesn't default to interlaced.

Andy Civil andycivil at gmail.com
Sun Jul 28 03:56:35 CEST 2013

On 2013-07-27 9:16 PM, Mike Brown wrote:
> On Sat, Jul 27, 2013 at 05:09:33PM -0400, Andy Civil wrote:
>> The way I'm analysing my output, is that I view it in VLC. What should
>> happen is that I see the 'comb' effect on any moving edges, but if I choose
>> to turn de-interlacing on, that comb effect disappears.
> With interlaced video, you better see the "comb" effect with motion video.
> But, there is fine print: 1) if the source was from pure interlaced video,
> i.e., a live event; 2) the source is 2:3 pulldown video, where 3 frames will
> not have the effect and 2 frames will.
> You won't have the effect if the source video was progressive.  You might not
> get the effect if converting 25 fps source to 29.97 fps.  The 25 fps source
> might be progressive in nature (Doctor Who for example).  It depends on how
> the conversion to 29.97 fps is done and if told to do interlaced.

The video starts from my Sony HX5 as 1920 x 1080 x 30i. It's then deinterlaced 
by a commercial video editor to 1920 x 1080 x 60p. Every frame is different.


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