Use a global styles.ass for .srt subtitles while preserving .ass subtitle files' natively defined styles?

[alexysong]

I have a styles.ass file that defines subtitle styles. I would like to apply it to those subtitle files that don't define a style, e. g. .srt. But for those that do define styles, like .ass subtitles, I don't want to use my styles.ass.

Is there a way to configure this? Thanks.

[llyyr]

Get the track codec for the subtitle, and set --sub-ass-styles if it's not ass

[alexysong]

Thanks, but somehow this doesn't work for me. I tried:

[external-style-for-non-ass]
profile-cond=get("current-tracks/sub/codec", "") ~= "" and get("current-tracks/sub/codec", "") ~= "ass"
profile-restore=copy
sub-ass-styles=~~home/styles.ass

This is mpv version 0.41 on Windows.
Chatgpt says for .srt actually the loaded style will be overwrittetn by

if (converted && track->default_style < track->n_styles) {
    mp_ass_set_style(track->styles + track->default_style,
                     track->PlayResY, opts->sub_style);
}

Is this intended?

[XNinety9]

You can skip styles.ass for this. For subtitles that are converted to ASS internally (SRT, WebVTT…), mpv builds the default style from the --sub-* options, which is the code you quoted, and it overrides the Default style from sub-ass-styles. That's why your profile has no visible effect. Native .ass files keep their own styles, since sub-ass-override defaults to scale.

So the --sub-* options already give you "my style for SRT, the file's own style for ASS". Put the style from your styles.ass into mpv.conf:

sub-font="Your Font"
sub-font-size=44
sub-color="#FFFFFFFF"
sub-outline-color="#FF000000"
sub-outline-size=2
sub-shadow-offset=1
sub-margin-y=40

I checked on 0.41 with the same video, once with an SRT and once with an ASS: these options restyle the SRT, and the ASS keeps its own font, color and alignment.