On 18/06/2025 23.56, Carl Zwanzig wrote:
On 6/18/2025 2:41 PM, Mark Filipak wrote:
Z, how am I or anyone to know what "sost#0:2" means? I don't even know what
"sost" means.
(does that specifically matter? I don't think so.)
After that.... RTFM? (I think you've used -map before so probably understand the concept of stream
specifiers.)
"5.1 Stream specifiers"
stream_type[:additional_stream_specifier]
[...]
stream_type is one of following: ’v’ or ’V’ for video, ’a’ for audio, ’s’ for subtitle, ’d’ for
data, and ’t’ for attachments. ’v’ matches all video streams, ’V’ only matches video streams which
are not attached pictures, video thumbnails or cover arts.
and
#stream_id or i:stream_id
Match the stream by stream id (e.g. PID in MPEG-TS container).
Likewise "4.1.1 Automatic stream selection" tells us-
It will select that stream based upon the following criteria:
[...]
for subtitles, it is the first subtitle stream found but there’s a caveat. The output format’s
default subtitle encoder can be either text-based or image-based, and only a subtitle stream of the
same type will be chosen.
(If mp4 only supports text subtitles and dvds have only images, of course it'll
cough up an error.)
The output -told- you that #0:2 is subtitles, so an error message containing that is probably about
those subtitles. Seemed obvious to me and I don't work much with ffmpeg.
I suggest you reread the basic ffmpeg manual at https://www.ffmpeg.org/ffmpeg.html; it's always good
to reread the basics, sometimes useful things pop out afresh.
Take a pill, Z.
You folks will never understand a user's perspective. I'm supposed to know what "sost#0:2" means
because... of what? Because I'm supposed to be psychic?
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