The new video is anamorphic while the script was created with a pre-stretched video (or vice versa). There are a few common scnarios where the aspect ratio will have changed: If the video's aspect ratio is different from the script's, you'll get the following dialog: You want to do this if you are opening a lower-resolution work raw after the subtitles have already been styled for the final video resolution. This is the correct thing to do only if the subtitles actually match the video you just opened already, but someone previously changed the script resolution to an incorrect value.Ĭancel or hitting ESC will leave the script resolution at its current value. "Set to video resolution" will simply set the script resolution to the video's resolution. "Resample script" will resample the subtitles to the new video's resolution as if you had used the Resolution Resampler, and is normally what you want if you're updating pre-existing subtitles for the video you just opened. If the video and the script have the same aspect ratio, you'll get the following dialog: When opening a video which has a different resolution from the script's resolution, by default Aegisub will ask you what to do. This is normally automatically set correctly by recent versions of Aegisub, but you may need to manually adjust it if working with scripts created by pre-3.1 versions. In some situations the subtitle renderer needs to know which color matrix was used by Aegisub to be able to correctly match Aegisub's rendering of the subtitles. You can ignore this entirely unless you are creating subtitles which need to exactly match a color in the video (such as if you are masking a portion of the screen with a vector drawing).Ĭolors in ASS are specified as BGR values, but videos are normally stored in YCbCr, and there are several possible conversions between the two. If the script has already been styled and you now want to use it with a video of a different resolution, use the Resolution Resampler. If you currently have an unstyled subtitle script which was set to the wrong resolution for whatever reason, change it in the Properties dialog. Which to do depends on why you need to change the resolution. The script resolution can be changed either by simply changing the value in the Properties dialog, or by resampling the script to a new resolution with the Resolution Resampler tool. Scaling them relative to the script resolution should always be enabled. Which is used is controlled by the ScaledBorderAndShadow field in the header: if yes, script resolution is used, if no, video resolution is used. Note that this is not the normal definition of font size, and that it does not use the width at all.Īs a result, the script resolution can not be used to adjust the aspect ratio of the subtitles for anamorphic video.īorder sizes, shadow distance and blur strength: these can be in either script resolution or video resolution pixels. There are several categories of things which are affected by the script resolution:Ībsolute coordinates (margins, \pos, \move, \clip, vector drawings): all absolute coordinates are in script resolution pixels and work sensibly.įont sizes: the font size in ASS is the line height in script resolution pixels. However, if you're just creating simple styled subtitles, you normally should not have to worry about this. If you are releasing a single subtitles file with multiple videos of different resolutions, the Resolution Resampler can be used to convert a single file to each video resolution. Unfortunately, due to some bugs in the reference implementation of the subtitle format (VSFilter), rendering subtitles whose script resolution is not equal to the actual video resolution works poorly.īecause the behavior of mismatched script and video resolutions can be confusing, we recommend keeping them the same when doing any complex styling. This is achieved by using a virtual video resolution which controls how font sizes and coordinates are interpreted, which is commonly known as the "script resolution". ASS subtitle files are, to some extent, video independant and can be used with video files other than the one they were created with.
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