[FFmpeg-user] Problem with pixel format and/or missing constant

Mark Filipak markfilipak.windows+ffmpeg at gmail.com
Thu Mar 12 00:58:11 EET 2020

On 03/11/2020 06:45 PM, Carl Eugen Hoyos wrote:
> Am Mi., 11. März 2020 um 23:15 Uhr schrieb Mark Filipak
> <markfilipak.windows+ffmpeg at gmail.com>:
>> On 03/11/2020 06:09 PM, Carl Eugen Hoyos wrote:
>>> Am Mi., 11. März 2020 um 23:05 Uhr schrieb Mark Filipak
>>> <markfilipak.windows+ffmpeg at gmail.com>:
>>>> For what it's worth, though the MPEG encoder specs support full, 16-bit
>>>> monochrome (black-&-white) that, theoretically, would better render
>>> I didn't know and I am mildly surprised (16bit video is very uncommon).
>>> Otoh, "MPEG encoder spec" is not very precise...
>>>> monochrome video, all of the modern DVDs that I've encountered
>>>> use YCbCr 4:2:0 for black-&-white movies.
>>> Because that is what the DVD specification requires.
>> Ah! Well, that explains it. Thanks Carl Eugen. I haven't spent the
>> $5-thousand for the DVD spec.
> This is part of the publicly known, non-secret part of the specification.
>> By the way, of course, I made a silly mistake. I should have written
>> "full, 24-bit monochrome".
> I am curious: Which MPEG specification defines 24-bit monochrome
> encoding?

Edit: Now that I think about it more, maybe I was right in the first 
place: 16-bit monochrome. Like I 'said', since it (16-bit/24-bit) isn't 
used for DVD, I didn't commit it to documentation. I'll try harder.

Oh, gosh, I ran across that long, long ago. Since it's not used for 
DVDs, I just noted it but didn't document it. I'll be on the lookout for 
it and get back to you, but don't hold your breath. :-)


More information about the ffmpeg-user mailing list