ffmpeg - Questions about Global Tags and Tags

[joegreen]

I ran a command such as this

ffmpeg -y -I input.mkv -map 0:v -c:v copy -map 0:a -c:a:0 copy -map 0:a -c:a:1 ac3 -map 0:1 -c:1 copy output.mkv

When I view, the output.mkv in MKVToolNix GUI program, I see this


[Attachment 64913 - Click to enlarge]

Can someone explain me what are Global Tags and Tags are? I didn’t add them.

Also SubRip/SRT is displayed as SubStationAlpha. What is causing this renaming? How can I keep the same name?

Thanks in advance for your time and help.

Joe

[october262]

I ran a command such as this

ffmpeg -y -I input.mkv -map 0:v -c:v copy -map 0:a -c:a:0 copy -map 0:a -c:a:1 ac3 -map 0:1 -c:1 copy output.mkv

When I view, the output.mkv in MKVToolNix GUI program, I see this


[Attachment 64913 - Click to enlarge]

Can someone explain me what are Global Tags and Tags are? I didn’t add them.

Also SubRip/SRT is displayed as SubStationAlpha. What is causing this renaming? How can I keep the same name?

Thanks in advance for your time and help.

Joe

see this reddit thread - https://www.reddit.com/r/ffmpeg/comments/g99omc/how_to_prevent_ffmpeg_from_writing_this_globaltags/
you can remove the Global Tags if you wish.

[Selur]

Global tags are all tags that are not associated or part of a specific audio/video/subtitle stream.

Also SubRip/SRT is displayed as SubStationAlpha. What is causing this renaming? How can I keep the same name

You can't that's just how mkvtoolnix displays the used format, other tools can display the format using a different name,.