This is often the go-to community hub. You can search for "Alien Covenant" and look for the entry that explicitly mentions the x264 BluRay tag.
Only download .srt , .sub , or .vtt files. If a "subtitle" site asks you to download an .exe or .zip that contains an application, it is likely malware. Real subtitle files are plain text and do not need to be "installed." subtitle Alien:.Covenant.2017.720p.BluRay.x264....
Searching for the right subtitle file can often feel like a mini-adventure in digital troubleshooting. If you are looking for the specific file , Finding the Correct File This is often the go-to community hub