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

[Mark Filipak]

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.