Rearchitected transcoding to treat codecs and encoders as separate concepts.

core/transcoder/encoder_qsv.go

@@ -0,0 +1,72 @@
+package transcoder
+
+import log "github.com/sirupsen/logrus"
+
+// QuicksyncEncoder uses Intel Quick Sync Video hardware encoding.
+type QuicksyncEncoder struct{}
+
+func (e *QuicksyncEncoder) Name() string {
+	return "qsv"
+}
+
+func (e *QuicksyncEncoder) DisplayName() string {
+	return "Intel QuickSync"
+}
+
+func (e *QuicksyncEncoder) GlobalFlags() []string {
+	return []string{
+		"-init_hw_device", "qsv=hw",
+		"-filter_hw_device", "hw",
+	}
+}
+
+func (e *QuicksyncEncoder) PixelFormat() string {
+	return "qsv"
+}
+
+func (e *QuicksyncEncoder) Scaler() string {
+	return "scale_qsv"
+}
+
+func (e *QuicksyncEncoder) ExtraFilters() string {
+	return "hwupload=extra_hw_frames=64,format=qsv"
+}
+
+func (e *QuicksyncEncoder) ExtraArguments() []string {
+	return nil
+}
+
+func (e *QuicksyncEncoder) VariantFlags(v *HLSVariant) []string {
+	return nil
+}
+
+func (e *QuicksyncEncoder) SupportedVideoCodecs() []string {
+	return []string{videoCodecH264}
+}
+
+func (e *QuicksyncEncoder) FFmpegEncoderForCodec(codec string) string {
+	switch codec {
+	case videoCodecH264:
+		return "h264_qsv"
+	default:
+		log.Warnf("quicksync encoder does not support codec %q, falling back to h264_qsv", codec)
+		return "h264_qsv"
+	}
+}
+
+func (e *QuicksyncEncoder) GetPresetForLevel(l int) string {
+	presetMapping := map[int]string{
+		0: "veryfast",
+		1: "fast",
+		2: "medium",
+		3: "slow",
+		4: "veryslow",
+	}
+	preset, ok := presetMapping[l]
+	if !ok {
+		defaultPreset := presetMapping[2]
+		log.Errorf("Invalid level for quicksync preset %d, defaulting to %s", l, defaultPreset)
+		return defaultPreset
+	}
+	return preset
+}