[FFmpeg-user] Yes or No? About the processing pipeline.

[Ferdi Scholten]

On 17-06-2025 19:47, Mark Filipak wrote:
> On 17/06/2025 13.43, Paul B Mahol wrote:
>> On Tue, Jun 17, 2025 at 5:41 PM Mark Filipak <
>> markfilipak.imdb-at-gmail.com at ffmpeg.org> wrote:
>>
>>> On 17/06/2025 13.37, Paul B Mahol wrote:
>>>> On Tue, Jun 17, 2025 at 5:33 PM Mark Filipak <
>>>> markfilipak.imdb-at-gmail.com at ffmpeg.org> wrote:
>>>>
>>>>> On 17/06/2025 13.31, Paul B Mahol wrote:
>>>>>> On Tue, Jun 17, 2025 at 5:24 PM Mark Filipak <
>>>>>> markfilipak.imdb-at-gmail.com at ffmpeg.org> wrote:
>>>>>>
>>>>>>> On 17/06/2025 13.20, Paul B Mahol wrote:
>>>>>>>> On Tue, Jun 17, 2025 at 5:18 PM Mark Filipak <
>>>>>>>> markfilipak.imdb-at-gmail.com at ffmpeg.org> wrote:
>>>>>>>>
>>>>>>>>> On 17/06/2025 13.15, Paul B Mahol wrote:
>>>>>>>>>> On Tue, Jun 17, 2025 at 5:12 PM Mark Filipak <
>>>>>>>>>> markfilipak.imdb-at-gmail.com at ffmpeg.org> wrote:
>>>>>>>>>>
>>>>>>>>>>> Yes (true) or No (false)?
>>>>>>>>>>>
>>>>>>>>>>> If the input is 8-bit ybr420-smpte170m, then the processing
>>> pipeline
>>>>>>> is
>>>>>>>>>>> also 8-bit ybr420-smpte170m.
>>>>>>>>>>>
>>>>>>>>>> Depends on all components used in pipeline.
>>>>>>>>>
>>>>>>>>> Sorry. I'm 'talking' about the start of the processing pipeline,
>>>>> coming
>>>>>>>>> out of the decoder.
>>>>>>>>> Let me restate the issue:
>>>>>>>>>
>>>>>>>>> If the input is 8-bit ybr420-smpte170m, then the decoder outputs
>>> 8-bit
>>>>>>>>> ybr420-smpte170m.
>>>>>>>>> Yes or No.
>>>>>>>>
>>>>>>>> Definition of decoder is to decode data, not invent new data or 
>>>>>>>> alter
>>>>>>> data
>>>>>>>> in any way.
>>>>>>>
>>>>>>> Does that mean 'Yes': Decoders that are fed 8-bit ybr420-smpte170m
>>> then
>>>>>>> output 8-bit ybr420-smpte170m?
>>>>>>>
>>>>>>
>>>>>> I write words, In my school I learned much more words than simple:
>>> 'Yes'
>>>>>> and 'No'.
>>>>>
>>>>> Good for you.
>>>>>
>>>>> Decoders that are fed 8-bit ybr420-smpte170m then output 8-bit
>>>>> ybr420-smpte170m.
>>>>> Yes or No?
>>>>
>>>> Maybe.
>>>
>>> Paul, you appear to be intentionally keeping FFmpeg users ignorant 
>>> of the
>>> facts.
>>
>> No going to play your games.
>
> This is not a game.
>
> If the input is 8-bit ybr420-smpte170m, then the decoder outputs 8-bit 
> ybr420-smpte170m.
> Yes or No.
No