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

[Mark Filipak]

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?