diff --git a/internal/ffmpeg/hardware/hardware_darwin.go b/internal/ffmpeg/hardware/hardware_darwin.go
index 923f4159..4f59ca6a 100644
--- a/internal/ffmpeg/hardware/hardware_darwin.go
+++ b/internal/ffmpeg/hardware/hardware_darwin.go
@@ -4,8 +4,8 @@ import (
 	"github.com/AlexxIT/go2rtc/internal/api"
 )
 
-const ProbeVideoToolboxH264 = "-f lavfi -i testsrc2 -t 1 -c h264_videotoolbox -f null -"
-const ProbeVideoToolboxH265 = "-f lavfi -i testsrc2 -t 1 -c hevc_videotoolbox -f null -"
+const ProbeVideoToolboxH264 = "-f lavfi -i testsrc2=size=svga -t 1 -c h264_videotoolbox -f null -"
+const ProbeVideoToolboxH265 = "-f lavfi -i testsrc2=size=svga -t 1 -c hevc_videotoolbox -f null -"
 
 func ProbeAll(bin string) []api.Stream {
 	return []api.Stream{