video->set_colour_conversion (PresetColourConversion::from_id ("rec2020").conversion);
break;
default:
- if (s.width < 1080) {
+ if (s && s->width < 1080) {
video->set_colour_conversion (PresetColourConversion::from_id ("rec601").conversion);
} else {
video->set_colour_conversion (PresetColourConversion::from_id ("rec709").conversion);