[FFmpeg-user] Stream #0:0(und)

[BloodMan]

Hello...

W dniu 2025-06-15 o 18:39, Mark Filipak pisze:
> On 14/06/2025 08.35, Andrew Randrianasulu wrote:
>> сб, 14 июн. 2025 г., 15:21 Mark Filipak <
>> markfilipak.imdb-at-gmail.com at ffmpeg.org>:
>>
>>> On 14/06/2025 03.22, Paul B Mahol wrote:
>>>> undefined?
>>>
>>> Ha, ha, ha. "und" is undefined? There's a kinda elegiac poetry about 
>>> that.
>>> If it does mean
>>> "undefined", how can stream 0:0 be undefined? It's there; it exists.
>>>
>>> "Stream #0:0(und)" was in an otherwise unremarkable output listing.
>>>
>>
>> May be it was about track's language?
> 
> Sorry for the slow response. '0:0' is a video stream, no language. So, 
> what does 'Stream #0:0(und)' mean for video, eh?

Mark, are you really feeling okay? Because it doesn't look like it...

What don't you understand? und = undefined
A video track CAN have a language - it can have, for example, hardcoded 
screen captions (or just text, e.g. karaoke lyrics), so it can have a 
language.
Therefore, there is an option to set a language for a video track, and 
this is both normal and allowed.


-- 
Pozdrawiam,
bloodman at gmail.com