[FFmpeg-user] should I shoot the dog?

[Michael Koch]

Am 29.09.2020 um 16:26 schrieb Mark Filipak (ffmpeg):
> On 09/29/2020 09:37 AM, Michael Koch wrote:
>> Am 29.09.2020 um 14:58 schrieb Mark Filipak (ffmpeg):
>>> On 09/29/2020 04:06 AM, Michael Koch wrote:
>>>> Am 29.09.2020 um 04:28 schrieb Mark Filipak (ffmpeg):
>>>>>
>>>>> I just want to understand the frame structures that ffmpeg 
>>>>> creates, and that ffmpeg uses in processing and filtering. Are Y, 
>>>>> Cb, Cr separate buffers? That would be logical. Or are the Y, Cb, 
>>>>> Cr values combined and organized similarly to macroblocks? I've 
>>>>> found some code that supports that. Or are the Y, Cb, Cr values 
>>>>> thrown together, pixel-by-pixel. That would be logical, too.
>>>>
>>>> As far as I understood it, that depends on the pixel format.
>>>> For example there are "packed" pixel formats rgb24, bgr24, argb, 
>>>> rgba, abgr, bgra,rgb48be, rgb48le, bgr48be, bgr48le.
>>>> And there are "planar" pixel formats gbrp, bgrp16be, bgrp16le.
>>>
>>> Hi Michael,
>>>
>>> "Packed" and "planar", eh? What evidence do you have? ...Share the 
>>> candy!
>>
>> As far as I know, this is not described in the official 
>> documentation. You can find it for example here:
>> https://video.stackexchange.com/questions/16374/ffmpeg-pixel-format-definitions 
>>
>
> Thanks for that. It saved me some time. ...So, what does "planar" 
> mean? What does "packed" mean?

Here is an example for a very small image with 3 x 2 pixels.
In (packed) RGB24 format:   RGBRGBRGBRGBRGBRGB
In (planar) GBRP format: GGGGGGBBBBBBRRRRRR

Michael