[ASK] Is muxing and extracting affect quality

[benqsiemens]

Hello everybody. I am new to this forum. I am new about video & audio encoding and I am learning it by researching through the internet. I have a question, please help me.

"Is extracting & muxing affect the quality ?" (example: in order to include subtitle from my own language on a mkv; and remove the unneeded one, I must extract the streams and muxing it with the new subtitle; minus the subtitles that I don't need). I prefer all streams (in this case: subtitle) contained in just 1 file (just the mkv), buat if the process of extracting and muxing will degrade its quality, I think I have to leave it on separate subtitle file when played. I am using GUI based mkvextract and mkvmerge on that process.

Thank you everybody and I am sorry for my bad English, because it is not my native language.

[kypec]

You don't have to worry about quality of video, audio or subtitle when you are only re-muxing your files. The original streams remain intact, they're only re-packaged to same (or different if wanted) type of container=output file.
BTW Welcome to the forums, you'll surely find answers to all your questions around here ;)

[benqsiemens]

Thank you for your quick answer "kypec". Now I am confident to merge subtitle on my own language into the container since the quality will not degrade. I will do it on my entire collections.

I think on this case it looks like archiving with zip or rar (the contents will not change) or something like that, is that correct ?

Yes, I think I will learn much in this forum, I have read many threads here now, learning some newby guides, and I think many friends here have high knowledge and willing to help each others. Thank you.

[mswaino2]

The quality of the files used will not change just from muxing and extracting them again. Thats only an issue if your re encoding the files.

[Chetwood]

in order to include subtitle from my own language on a mkv; and remove the unneeded one, I must extract the streams and muxing it with the new subtitle; minus the subtitles that I don't need).
No need to extract. Open the MKV, uncheck the stream you don't need and add your new one, then mux.