AssRender is an AviSynth plugin that renders ASS/SSA and SRT (without the HTML-like markup) subtitles. It uses libass to render the subtitles, which makes it the fastest and most correct ASS renderer for AviSynth.
This also means that it is much more picky about script syntax than VSFilter and friends, so keep that in mind before blaming the filter. Yes, people have reported a lot of errors that were actually the script author’s fault.
assrender(clip, string file, [string vfr, int hinting, float scale, float line_spacing, float dar, float sar, int top, int bottom, int left, int right, string charset, int debuglevel, string fontdir, string srt_font, string colorspace])
string file
Your subtitle file. May be ASS, SSA or SRT.
string vfr
Specify timecodes v1 or v2 file when working with VFRaC.
int hinting
Font hinting mode. Choose between none (0, default), light (1), normal (2) and Freetype native (3) autohinting.
float scale
Font scale. Defaults to 1.0.
float line_spacing
Line spacing in pixels. Defaults to 1.0 and won’t be scaled with frame size.
float dar, float sar
Aspect ratio. Of course you need to set both parameters.
int top, int bottom, int left, int right
Margins. They will be added to the frame size and may be negative.
string charset
Character set to use, in GNU iconv or enca format. Defaults to UTF-8.
Example enca format: enca:pl:cp1250
(guess the encoding for Polish, fall back on cp1250)
int debuglevel
How much crap assrender is supposed to spam to stderr.
string fontdir
Additional font directory. Useful if you are lazy but want to keep your system fonts clean.
string srt_font
Font to use for SRT subtitles. Defaults to whatever Fontconfig chooses for “sans-serif”.
string colorspace
The color space of your (YUV) video. Possible values:
- Rec2020, BT.2020
- Rec709, BT.709
- Rec601, BT.601
Default is to use the ASS script’s “Video Colorspace” property, else guess based on video resolution (width > 1920 or height > 1080 → BT.2020, then width > 1280 or height > 576 → BT.709).