merging video and subtitle

[hoonified]

hi i'm just wondering does merging subtitle with video using ffmpeg decrease the quality of the video? thank you so much!

[ProWo]

If you mux them, no.
If you hardcode the sub, then yes.

[hoonified]

If you mux them, no.
If you hardcode the sub, then yes.

hii does this code mux them? (sorry i'm very new to this huhu)

ffmpeg -i "BEHIND.mp4" -i "WEBVTT.txt" -c copy -c:s mov_text "FATE IN JAPAN.mp4"

[jagabo]

"-c copy" means re-mux (copy) the streams (no loss of quality), don't re-encode them (potential loss of quality).

[hoonified]

"-c copy" means re-mux (copy) the streams (no loss of quality), don't re-encode them (potential loss of quality).

hiii so i just continue using the code i'm using? is that right? (thank you for both your helps AAA)

[ProWo]

Yes

[hoonified]

yes

thank you sooo much!!! <33