IDK man, changes I guess

ffmpeg.go

@@ -100,6 +100,7 @@ type Tools struct {
 
 	mu       sync.Mutex
 	encoders map[string]bool // usable encoders (hardware ones are test-encoded)
+	filters  map[string]bool // filters compiled into ffmpeg
 	ready    bool
 }
 
@@ -162,6 +163,12 @@ func (t *Tools) HasEncoder(name string) bool {
 	return t.encoders[name]
 }
 
+func (t *Tools) HasFilter(name string) bool {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	return t.filters[name]
+}
+
 // CodecList returns the catalog entries this ffmpeg build can use.
 func (t *Tools) CodecList() []Codec {
 	t.mu.Lock()
@@ -175,9 +182,9 @@ func (t *Tools) CodecList() []Codec {
 	return out
 }
 
-// detectEncoders lists the encoders compiled into ffmpeg and test-encodes a
-// few frames with each hardware encoder, since being compiled in does not mean
-// the GPU is present.
+// detectEncoders lists the encoders and filters compiled into ffmpeg and
+// test-encodes a few frames with each hardware encoder, since being compiled
+// in does not mean the GPU is present.
 func (t *Tools) detectEncoders() {
 	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
 	defer cancel()
@@ -191,6 +198,14 @@ func (t *Tools) detectEncoders() {
 			}
 		}
 	}
+	filters := map[string]bool{}
+	if out, err := command(ctx, t.FFmpeg, "-hide_banner", "-filters").Output(); err == nil {
+		for _, line := range strings.Split(string(out), "\n") {
+			if f := strings.Fields(line); len(f) >= 3 && strings.Contains(f[2], "->") {
+				filters[f[1]] = true
+			}
+		}
+	}
 	usable := map[string]bool{}
 	var wg sync.WaitGroup
 	var mu sync.Mutex
@@ -220,6 +235,7 @@ func (t *Tools) detectEncoders() {
 	wg.Wait()
 	t.mu.Lock()
 	t.encoders = usable
+	t.filters = filters
 	t.ready = true
 	t.mu.Unlock()
 }