JPEG2000 j2c interlace field

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terabrit
Posts: 3
Joined: Sun Jan 12, 2020 12:36 pm

JPEG2000 j2c interlace field

Post by terabrit »

jpeg2000 j2c interlace field images display as if they were R only. but actually the pixel format is YCbCr, with Cb and Cr being half width.
typically these images are encoded by libopenjpeg, the ffmpeg string is -vcodec libopenjpeg -format 0.
often they are scanned half height at 59.97 images per second, each one is a television field
they are used by the US Library of Congress for archive of NTSC television
I attach one frame and a screenshot

thanks!
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xnview
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Joined: Mon Oct 13, 2003 7:31 am
Location: France

Re: JPEG2000 j2c interlace field

Post by xnview »

ok, i'll check
Pierre.