ScaledBorderAndShadow should default to “no”

[kyuunbe]

Subitle resolution: 384x288
Video resolution: 1920x1080
Style: Arial Rounded MT Bold, size=17, border=3

VSFilter (Aegisub and MPC-HC):

libass (mpv and VLC)

[kyuunbe]

Subitle resolution: 1280x720
Video resolution: 1920x1080
Style: Arial Rounded MT Bold, size=40, border=4, shadow=2

VSFilter (Aegisub and MPC-HC):

libass (mpv and VLC)

[astiob]

Does your script have a ScaledBorderAndShadow header?

If not, the problem is that libass currently defaults this value to “yes” whereas VSFilter defaults it to “no”, and we’re currently discussing (on IRC) how to fix this without breaking applications such as mpv and FFmpeg.

Are you the author of the script? If you are, please explicitly enable scaled border and shadow and recalculate your borders and shadows (or enable scaled border and shadow, change the PlayResX and PlayResY headers to match the video and recalculate your font sizes instead). This is easier to understand and work with, and also most compatible with old versions of libass and media players using libass (although if your script has complex sign typesetting, then old libass may be broken anyway, so this may not mean much). If you’re using Aegisub, this is controlled by a checkbox in the Script Properties window. But if you really must, you can explicitly disable scaled border and shadow by adding a ScaledBorderAndShadow: no header. (I don’t know if Aegisub does this when the checkbox is unchecked.)

[kyuunbe]

I don't fansub, I'm just a mpv user who noticed that this happens in a lot releases from different fansub groups and it starts to getting annoying when the borders are too big.

Maybe an optional parameter on mpv could fix this? (Like --disableborderandshadowscaling)

[astiob]

Oh, this is a duplicate of #154. I can’t decide which bug report is better, so let’s keep the older one.

[astiob]

On second thought, #154 contains two separate issues, so I’ll rather split it and keep this bug for the ScaledBorderAndShadow default.

[avih]

FWIW, this commit made the OSD outline in mpv very thin, and subjectively too thin IMHO. See mpv-player/mpv#7900 .