Initial commit

cmd/ffmpeg/README.md

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+## Useful links
+
+- https://superuser.com/questions/564402/explanation-of-x264-tune
+- https://stackoverflow.com/questions/33624016/why-sliced-thread-affect-so-much-on-realtime-encoding-using-ffmpeg-x264
+- https://codec.fandom.com/ru/wiki/X264_-_%D0%BE%D0%BF%D0%B8%D1%81%D0%B0%D0%BD%D0%B8%D0%B5_%D0%BA%D0%BB%D1%8E%D1%87%D0%B5%D0%B9_%D0%BA%D0%BE%D0%B4%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F
+- https://html5test.com/

cmd/ffmpeg/ffmpeg.go

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+package ffmpeg
+
+import (
+	"github.com/AlexxIT/go2rtc/cmd/app"
+	"github.com/AlexxIT/go2rtc/cmd/exec"
+	"github.com/AlexxIT/go2rtc/cmd/streams"
+	"github.com/AlexxIT/go2rtc/pkg/streamer"
+	"net/url"
+	"strings"
+)
+
+func Init() {
+	var cfg struct {
+		Mod map[string]string `yaml:"ffmpeg"`
+	}
+
+	// defaults
+
+	cfg.Mod = map[string]string{
+		"bin": "ffmpeg",
+
+		// inputs
+		"link": "-hide_banner -i {input}",
+		"rtsp": "-hide_banner -fflags nobuffer -flags low_delay -rtsp_transport tcp -i {input}",
+		"file": "-hide_banner -re -stream_loop -1 -i {input}",
+
+		// output
+		"out": "-rtsp_transport tcp -f rtsp {output}",
+
+		// `-g 30` - group of picture, GOP, keyframe interval
+		// `-preset superfast` - we can't use ultrafast because it doesn't support `-profile main -level 4.1`
+		// `-tune zerolatency` - for minimal latency
+		// `-profile main -level 4.1` - most used streaming profile
+		"h264":       "-codec:v libx264 -g 30 -preset superfast -tune zerolatency -profile main -level 4.1",
+		"h264/ultra": "-codec:v libx264 -g 30 -preset ultrafast -tune zerolatency",
+		"h264/high":  "-codec:v libx264 -g 30 -preset superfast -tune zerolatency",
+		"h265":       "-codec:v libx265 -g 30 -preset ultrafast -tune zerolatency",
+		"opus":       "-codec:a libopus -ar 48000 -ac 2",
+		"pcmu":       "-codec:a pcm_mulaw -ar 8000 -ac 1",
+		"pcmu/16000": "-codec:a pcm_mulaw -ar 16000 -ac 1",
+		"pcmu/48000": "-codec:a pcm_mulaw -ar 48000 -ac 1",
+		"pcma":       "-codec:a pcm_alaw -ar 8000 -ac 1",
+		"pcma/16000": "-codec:a pcm_alaw -ar 16000 -ac 1",
+		"pcma/48000": "-codec:a pcm_alaw -ar 48000 -ac 1",
+		"aac/16000":  "-codec:a aac -ar 16000 -ac 1",
+	}
+
+	app.LoadConfig(&cfg)
+
+	tpl := cfg.Mod
+
+	streams.HandleFunc("ffmpeg", func(s string) (streamer.Producer, error) {
+		s = s[7:] // remove `ffmpeg:`
+
+		var query url.Values
+		if i := strings.IndexByte(s, '#'); i > 0 {
+			query, _ = url.ParseQuery(s[i+1:])
+			s = s[:i]
+		}
+
+		var template string
+		switch {
+		case strings.HasPrefix(s, "rtsp"):
+			template = tpl["rtsp"]
+		case strings.Contains(s, "://"):
+			template = tpl["link"]
+		default:
+			template = tpl["file"]
+		}
+
+		s = "exec:" + tpl["bin"] + " " +
+			strings.Replace(template, "{input}", s, 1)
+
+		if query != nil {
+			for _, raw := range query["raw"] {
+				s += " " + raw
+			}
+
+			// TODO: multiple codecs via -map
+			// s += fmt.Sprintf(" -map 0:v:0 -c:v:%d copy", i)
+
+			for _, video := range query["video"] {
+				if video == "copy" {
+					s += " -codec:v copy"
+				} else {
+					s += " " + tpl[video]
+				}
+			}
+
+			for _, audio := range query["audio"] {
+				if audio == "copy" {
+					s += " -codec:v copy"
+				} else {
+					s += " " + tpl[audio]
+				}
+			}
+
+			if query["video"] == nil {
+				s += " -vn"
+			}
+			if query["audio"] == nil {
+				s += " -an"
+			}
+		} else {
+			s += " -c copy"
+		}
+
+		s += " " + tpl["out"]
+
+		return exec.Handle(s)
+	})
+}