Encoders then take the script file and create a single subtitled video file, often aiming for a target file size or video quality. "Hard" subtitles, or "hard subs", are encoded into the footage, and thus become hard to remove from the video without losing video quality. "Soft" subtitles, or "soft subs", are subtitles applied at playback time from a subtitle datafile, either mixed directly into the video file (.mkv, .ogm, etc.), or in a separate file (.ssa, .srt, etc.). Soft subs can also be rendered at higher resolutions, which can make for easier reading if the viewer is upscaling the file, but also are more difficult to blend into the video (for instance rotated text/moving text). Hard subs have traditionally been more popular than softsubs, due to a lack of player support and worries over plagiarism, but most fansub groups now release a softsub version of their releases.