add draft for rtmp

Dockerfile

@@ -20,6 +20,7 @@ RUN apt-get clean && apt-get update && \
 ENV GOPROXY=direct
 
 COPY . ./donut
+COPY ./go-astiav/ /Users/leandro.moreira/src/go-astiav/
 WORKDIR ${WD}/donut
 RUN go build .
 CMD ["/usr/src/app/donut/donut", "--enable-ice-mux=true"]

Makefile

@@ -1,30 +1,19 @@
 run:
-	# in case you need to re-build it, uncomment the following line
-	# docker compose stop && docker compose down && docker compose build && docker compose up origin srt app
-	docker compose stop && docker compose build app && docker compose up origin srt app
+	docker compose stop && docker compose up origin srt app
 
-test:
-	# in case you need to re-build it, uncomment the following line
-	# docker compose stop test && docker compose down test && docker compose build test && docker compose run --rm test
-	docker compose stop test && docker compose down test && docker compose run --rm test
+run-dev:
+	docker compose stop && docker compose down && docker compose build app && docker compose up origin srt app
+
+run-dev-total-rebuild:
+	docker compose stop && docker compose down && docker compose build && docker compose up origin srt app
+
+clean-docker:
+	docker-compose down -v --rmi all --remove-orphans &&  docker volume prune -a -f && docker system prune -a -f && docker builder prune -a -f
 
 run-srt:
 	docker compose stop && docker compose down && docker compose build srt && docker compose up srt
 
-mac-run-local:
-	./scripts/mac_local_run.sh
-
-mac-test-local:
-	./scripts/mac_local_run_test.sh
-
-html-local-coverage:
-	go tool cover -html=coverage.out
-
 lint:
 	docker compose stop lint && docker compose down lint && docker compose run --rm lint	
 
-# INCOMPLETE from https://github.com/asticode/go-astiav/blob/master/Makefile
-install-ffmpeg:
-	./scripts/install_local_ffmpeg.sh
-
 .PHONY: run lint test run-srt mac-run-local mac-test-local html-local-coverage install-ffmpeg

docker-compose.yaml

@@ -13,8 +13,10 @@ services:
       - "6060:6060"
     depends_on:
       - srt
+      - rtmp
     links:
       - srt
+      - rtmp
 
   test:
     build:
@@ -36,6 +38,19 @@ services:
       - "./:/app/"
     command: "golangci-lint run -v"
 
+  rtmp: # simulating an RTMP live transmission
+    image: jrottenberg/ffmpeg:4.4-alpine
+    entrypoint: sh
+    command: "/scripts/ffmpeg_rtmp.sh"
+    volumes:
+      - "./scripts:/scripts"
+      - "./fonts/0xProto:/usr/share/fonts"
+    environment:
+      - RTMP_HOST=0.0.0.0
+      - RTMP_PORT=1935
+    ports:
+      - "1935:1935"
+
   srt:
     build:
       context: .
@@ -62,8 +77,8 @@ services:
     command: "/scripts/ffmpeg_mpegts_udp.sh"
     volumes:
       - "./scripts:/scripts"
+      - "./fonts/0xProto:/usr/share/fonts"      
     environment:
       - SRT_INPUT_HOST=srt
       - SRT_INPUT_PORT=1234
       - PKT_SIZE=1316
-

fonts/0xProto/LICENSE

@@ -0,0 +1,92 @@
+Copyright (c) 2023, 0xType Project Authors (https://github.com/0xType)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded,
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

fonts/0xProto/README.md

@@ -0,0 +1,48 @@
+# Nerd Fonts
+
+This is an archived font from the Nerd Fonts release v3.2.1.
+
+For more information see:
+* https://github.com/ryanoasis/nerd-fonts/
+* https://github.com/ryanoasis/nerd-fonts/releases/latest/
+
+# 0xProto
+
+An opinionated font for software engineers.
+
+For more information have a look at the upstream website: https://github.com/0xType/0xProto
+
+Version: 1.603
+
+## Which font?
+
+### TL;DR
+
+* Pick your font family:
+  * If you are limited to monospaced fonts (because of your terminal, etc) then pick a font with `Nerd Font Mono` (or `NFM`).
+  * If you want to have bigger icons (usually around 1.5 normal letters wide) pick a font without `Mono` i.e. `Nerd Font` (or `NF`). Most terminals support this, but ymmv.
+  * If you work in a proportional context (GUI elements or edit a presentation etc) pick a font with `Nerd Font Propo` (or `NFP`).
+
+### Ligatures
+
+Ligatures are generally preserved in the patched fonts.
+Nerd Fonts `v2.0.0` had no ligatures in the `Nerd Font Mono` fonts, this has been dropped with `v2.1.0`.
+If you have a ligature-aware terminal and don't want ligatures you can (usually) disable them in the terminal settings.
+
+### Explanation
+
+Once you narrow down your font choice of family (`Droid Sans`, `Inconsolata`, etc) and style (`bold`, `italic`, etc) you have 2 main choices:
+
+#### `Option 1: Download already patched font`
+
+ * For a stable version download a font package from the [release page](https://github.com/ryanoasis/nerd-fonts/releases)
+ * Direct links for [0xProto.zip](https://github.com/ryanoasis/nerd-fonts/releases/latest/download/0xProto.zip) or [0xProto.tar.xz](https://github.com/ryanoasis/nerd-fonts/releases/latest/download/0xProto.tar.xz)
+
+#### `Option 2: Patch your own font`
+
+ * Patch your own variations with the various options provided by the font patcher (i.e. not include all symbols for smaller font size)
+
+For more information see: [The FAQ](https://github.com/ryanoasis/nerd-fonts/wiki/FAQ-and-Troubleshooting#which-font)
+
+[SIL-RFN]:http://scripts.sil.org/cms/scripts/page.php?item_id=OFL_web_fonts_and_RFNs#14cbfd4a
+

go.mod

@@ -2,9 +2,11 @@ module github.com/flavioribeiro/donut
 
 go 1.19
 
+replace github.com/asticode/go-astiav => /Users/leandro.moreira/src/go-astiav
+
 require (
 	github.com/asticode/go-astiav v0.12.0
-	github.com/asticode/go-astikit v0.36.0
+	github.com/asticode/go-astikit v0.42.0
 	github.com/kelseyhightower/envconfig v1.4.0
 	github.com/pion/webrtc/v3 v3.1.47
 	github.com/stretchr/testify v1.8.0

go.sum

@@ -1,7 +1,5 @@
-github.com/asticode/go-astiav v0.12.0 h1:tETfPhVpJrSyh3zvUOmDvebFaCoFpeATSaQAA7B50J8=
-github.com/asticode/go-astiav v0.12.0/go.mod h1:phvUnSSlV91S/PELeLkDisYiRLOssxWOsj4oDrqM/54=
-github.com/asticode/go-astikit v0.36.0 h1:WHSY88YT76D/XRbdp0lMLwfjyUGw8dygnbKKtbGNIG8=
-github.com/asticode/go-astikit v0.36.0/go.mod h1:h4ly7idim1tNhaVkdVBeXQZEE3L0xblP7fCWbgwipF0=
+github.com/asticode/go-astikit v0.42.0 h1:pnir/2KLUSr0527Tv908iAH6EGYYrYta132vvjXsH5w=
+github.com/asticode/go-astikit v0.42.0/go.mod h1:h4ly7idim1tNhaVkdVBeXQZEE3L0xblP7fCWbgwipF0=
 github.com/benbjohnson/clock v1.3.0 h1:ip6w0uFQkncKQ979AypyG0ER7mqUSBdKLOgAle/AT8A=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=

internal/controllers/engine/donut_engine_controller.go

@@ -2,6 +2,7 @@ package engine
 
 import (
 	"fmt"
+	"strings"
 
 	"github.com/flavioribeiro/donut/internal/controllers/probers"
 	"github.com/flavioribeiro/donut/internal/controllers/streamers"
@@ -11,10 +12,10 @@ import (
 )
 
 type DonutEngine interface {
-	Appetizer() entities.DonutAppetizer
+	Appetizer() (entities.DonutAppetizer, error)
 	ServerIngredients() (*entities.StreamInfo, error)
 	ClientIngredients() (*entities.StreamInfo, error)
-	RecipeFor(server, client *entities.StreamInfo) *entities.DonutRecipe
+	RecipeFor(server, client *entities.StreamInfo) (*entities.DonutRecipe, error)
 	Serve(p *entities.DonutParameters)
 }
 
@@ -80,7 +81,11 @@ type donutEngine struct {
 }
 
 func (d *donutEngine) ServerIngredients() (*entities.StreamInfo, error) {
-	return d.prober.StreamInfo(d.Appetizer())
+	appetizer, err := d.Appetizer()
+	if err != nil {
+		return nil, err
+	}
+	return d.prober.StreamInfo(appetizer)
 }
 
 func (d *donutEngine) ClientIngredients() (*entities.StreamInfo, error) {
@@ -91,7 +96,7 @@ func (d *donutEngine) Serve(p *entities.DonutParameters) {
 	d.streamer.Stream(p)
 }
 
-func (d *donutEngine) RecipeFor(server, client *entities.StreamInfo) *entities.DonutRecipe {
+func (d *donutEngine) RecipeFor(server, client *entities.StreamInfo) (*entities.DonutRecipe, error) {
 	// TODO: implement proper matching
 	//
 	// suggestions:
@@ -101,10 +106,16 @@ func (d *donutEngine) RecipeFor(server, client *entities.StreamInfo) *entities.D
 	//     preferable = [vp8, opus]
 	//     if union(preferable, client.medias)
 	//         transcode, preferable
+	appetizer, err := d.Appetizer()
+	if err != nil {
+		return nil, err
+	}
+
 	r := &entities.DonutRecipe{
-		Input: d.Appetizer(),
+		Input: appetizer,
 		Video: entities.DonutMediaTask{
-			Action: entities.DonutBypass,
+			// Action: entities.DonutBypass,
+			Action: entities.DonutTranscode,
 			Codec:  entities.H264,
 		},
 		Audio: entities.DonutMediaTask{
@@ -122,18 +133,29 @@ func (d *donutEngine) RecipeFor(server, client *entities.StreamInfo) *entities.D
 		},
 	}
 
-	return r
+	return r, nil
 }
 
-func (d *donutEngine) Appetizer() entities.DonutAppetizer {
-	// TODO: implement input based on param to build proper SRT/RTMP/etc
+func (d *donutEngine) Appetizer() (entities.DonutAppetizer, error) {
+	if strings.Contains(strings.ToLower(d.req.StreamURL), "rtmp") {
 		return entities.DonutAppetizer{
-		URL:    fmt.Sprintf("srt://%s:%d", d.req.SRTHost, d.req.SRTPort),
-		Format: "mpegts", // it'll change based on input, i.e. rmtp flv
+			URL: fmt.Sprintf("%s/%s", d.req.StreamURL, d.req.StreamID),
 			Options: map[entities.DonutInputOptionKey]string{
-			entities.DonutSRTStreamID:  d.req.SRTStreamID,
+				entities.DonutRTMPLive: "live",
+			},
+			// Format: "flv",
+		}, nil
+	} else if strings.Contains(strings.ToLower(d.req.StreamURL), "srt") {
+		return entities.DonutAppetizer{
+			URL:    d.req.StreamURL,
+			Format: "mpegts", // TODO: check how to get format for srt
+			Options: map[entities.DonutInputOptionKey]string{
+				entities.DonutSRTStreamID:  d.req.StreamID,
 				entities.DonutSRTTranstype: "live",
 				entities.DonutSRTsmoother:  "live",
 			},
+		}, nil
 	}
+
+	return entities.DonutAppetizer{}, entities.ErrUnsupportedStreamURL
 }

internal/controllers/probers/libav_ffmpeg.go

@@ -2,6 +2,7 @@ package probers
 
 import (
 	"fmt"
+	"strings"
 
 	"github.com/asticode/go-astiav"
 	"github.com/asticode/go-astikit"
@@ -39,7 +40,10 @@ func NewLibAVFFmpeg(
 
 // Match returns true when the request is for an LibAVFFmpeg prober
 func (c *LibAVFFmpeg) Match(req *entities.RequestParams) bool {
-	return req.SRTHost != ""
+	isRTMP := strings.Contains(strings.ToLower(req.StreamURL), "rtmp")
+	isSRT := strings.Contains(strings.ToLower(req.StreamURL), "srt")
+
+	return isRTMP || isSRT
 }
 
 // StreamInfo connects to the SRT stream to discovery media properties.
@@ -60,7 +64,7 @@ func (c *LibAVFFmpeg) StreamInfo(req entities.DonutAppetizer) (*entities.StreamI
 	inputOptions := c.defineInputOptions(req.Options, closer)
 
 	if err := inputFormatContext.OpenInput(req.URL, inputFormat, inputOptions); err != nil {
-		return nil, fmt.Errorf("error while inputFormatContext.OpenInput: %w", err)
+		return nil, fmt.Errorf("error while inputFormatContext.OpenInput: (%s, %#v, %#v) %w", req.URL, inputFormat, inputOptions, err)
 	}
 	closer.Add(inputFormatContext.CloseInput)
 

internal/controllers/streamers/libav_ffmpeg.go

@@ -50,7 +50,10 @@ func NewLibAVFFmpegStreamer(p LibAVFFmpegStreamerParams) ResultLibAVFFmpegStream
 }
 
 func (c *LibAVFFmpegStreamer) Match(req *entities.RequestParams) bool {
-	return req.SRTHost != ""
+	isRTMP := strings.Contains(strings.ToLower(req.StreamURL), "rtmp")
+	isSRT := strings.Contains(strings.ToLower(req.StreamURL), "srt")
+
+	return isRTMP || isSRT
 }
 
 type streamContext struct {
@@ -78,7 +81,7 @@ type libAVParams struct {
 }
 
 func (c *LibAVFFmpegStreamer) Stream(donut *entities.DonutParameters) {
-	c.l.Infow("streaming has started")
+	c.l.Infof("streaming has started for %#v", donut)
 
 	closer := astikit.NewCloser()
 	defer closer.Close()
@@ -89,20 +92,26 @@ func (c *LibAVFFmpegStreamer) Stream(donut *entities.DonutParameters) {
 
 	// it's useful for debugging
 	astiav.SetLogLevel(astiav.LogLevelDebug)
-	astiav.SetLogCallback(func(l astiav.LogLevel, fmt, msg, parent string) {
+	astiav.SetLogCallback(func(_ astiav.Classer, l astiav.LogLevel, fmt, msg string) {
 		c.l.Infof("ffmpeg %s: - %s", c.libAVLogToString(l), strings.TrimSpace(msg))
 	})
+	// 138.1 internal/controllers/streamers/libav_ffmpeg.go:95:24:
+	// cannot use func(l astiav.LogLevel, fmt, msg, parent string) {…}
+	// (value of type func(l astiav.LogLevel, fmt string, msg string, parent string)) as astiav.LogCallback value in argument to astiav.SetLogCallback
 
+	c.l.Infof("preparing input")
 	if err := c.prepareInput(p, closer, donut); err != nil {
 		c.onError(err, donut)
 		return
 	}
 
+	c.l.Infof("preparing output")
 	if err := c.prepareOutput(p, closer, donut); err != nil {
 		c.onError(err, donut)
 		return
 	}
 
+	c.l.Infof("preparing filters")
 	if err := c.prepareFilters(p, closer, donut); err != nil {
 		c.onError(err, donut)
 		return
@@ -121,6 +130,7 @@ func (c *LibAVFFmpegStreamer) Stream(donut *entities.DonutParameters) {
 			c.onError(donut.Ctx.Err(), donut)
 			return
 		default:
+			c.l.Infof("started reading frame")
 			if err := p.inputFormatContext.ReadFrame(inPkt); err != nil {
 				if errors.Is(err, astiav.ErrEof) {
 					c.l.Info("streaming has ended")
@@ -141,6 +151,63 @@ func (c *LibAVFFmpegStreamer) Stream(donut *entities.DonutParameters) {
 			isVideoBypass := donut.Recipe.Video.Action == entities.DonutBypass
 			if isVideo && isVideoBypass {
 				if donut.OnVideoFrame != nil {
+					// The SRT(mpegts[h264]) bitstream format is Annex B  0x0, 0x0, 0x0, 0x1 [Start Code]
+					//		[start code]--[NAL]--[start code]--[NAL] etc
+					//
+					// The RTMP(flv[h264]) bitstream format is AVCC (mp4) 0xY, 0xZ, 0xK, 0xW [Length]
+					//		[SIZE (4 bytes)]--[NAL]--[SIZE (4 bytes)]--[NAL] etc
+					//
+					// ref: https://stackoverflow.com/questions/28421375/usage-of-start-code-for-h264-video/29103276#29103276
+					//
+					// To convert from AVCC to AnnexB:
+					//
+					// Remove length, insert start code, insert SPS for each I-frame, insert PPS for each frame, insert AU delimiter for each GOP.
+					//
+					// https://ffmpeg.org/doxygen/trunk/h264__mp4toannexb__bsf_8c.html#a773e34981d7642d499348d1ae72fd02e
+
+					// av_bsf_send_packet(bsfContext, pkt)
+					// av_bsf_receive_packet(bsfContext, pkt)
+
+					// for {
+					// 	c.l.Infof("start receiving packet")
+					// 	if err := s.decCodecContext.ReceiveFrame(s.decFrame); err != nil {
+					// 		if errors.Is(err, astiav.ErrEof) || errors.Is(err, astiav.ErrEagain) {
+					// 			break
+					// 		}
+					// 		c.onError(err, donut)
+					// 		return
+					// 	}
+					// 	c.l.Infof("start filtering")
+					// 	if err := c.filterAndEncode(s.decFrame, s, donut); err != nil {
+					// 		c.onError(err, donut)
+					// 		return
+					// 	}
+					// }
+
+					bistreamFilter := astiav.FindBitStreamFilterByName("h264_mp4toannexb")
+					if bistreamFilter == nil {
+						c.l.Info("cannot find bit stream filter")
+						return
+					}
+					bsfCtx, err := astiav.AllocBitStreamContext(bistreamFilter)
+					if err != nil {
+						c.l.Info("error while AllocBitStreamContext", err)
+						return
+					}
+					if err := bsfCtx.Init(); err != nil {
+						c.l.Info("error while init", err)
+						return
+					}
+					if err := bsfCtx.SendPacket(inPkt); err != nil {
+						c.l.Info("error while SendPacket", err)
+						return
+					}
+
+					if bsfCtx.ReceivePacket(inPkt) != nil {
+						c.l.Info("error while ReceivePacket", err)
+						return
+					}
+
 					if err := donut.OnVideoFrame(inPkt.Data(), entities.MediaFrameContext{
 						PTS:      int(inPkt.Pts()),
 						DTS:      int(inPkt.Dts()),
@@ -169,12 +236,19 @@ func (c *LibAVFFmpegStreamer) Stream(donut *entities.DonutParameters) {
 				continue
 			}
 
+			if isAudio {
+				continue
+			}
+
+			c.l.Infof("start sending packet")
+			// c.processPacket(inPkt, s, donut)
 			if err := s.decCodecContext.SendPacket(inPkt); err != nil {
 				c.onError(err, donut)
 				return
 			}
 
 			for {
+				c.l.Infof("start receiving packet")
 				if err := s.decCodecContext.ReceiveFrame(s.decFrame); err != nil {
 					if errors.Is(err, astiav.ErrEof) || errors.Is(err, astiav.ErrEagain) {
 						break
@@ -182,7 +256,7 @@ func (c *LibAVFFmpegStreamer) Stream(donut *entities.DonutParameters) {
 					c.onError(err, donut)
 					return
 				}
-
+				c.l.Infof("start filtering")
 				if err := c.filterAndEncode(s.decFrame, s, donut); err != nil {
 					c.onError(err, donut)
 					return
@@ -414,8 +488,6 @@ func (c *LibAVFFmpegStreamer) prepareFilters(p *libAVParams, closer *astikit.Clo
 		closer.Add(inputs.Free)
 
 		if s.decCodecContext.MediaType() == astiav.MediaTypeAudio {
-			// TODO: what's the difference between args and content?
-			// why args are necessary?
 			args = astiav.FilterArgs{
 				"channel_layout": s.decCodecContext.ChannelLayout().String(),
 				"sample_fmt":     s.decCodecContext.SampleFormat().Name(),
@@ -483,6 +555,29 @@ func (c *LibAVFFmpegStreamer) prepareFilters(p *libAVParams, closer *astikit.Clo
 	return nil
 }
 
+func (c *LibAVFFmpegStreamer) processPacket(pkt *astiav.Packet, s *streamContext, donut *entities.DonutParameters) {
+	if err := s.decCodecContext.SendPacket(pkt); err != nil {
+		c.onError(err, donut)
+		return
+	}
+
+	for {
+		c.l.Infof("start receiving packet")
+		if err := s.decCodecContext.ReceiveFrame(s.decFrame); err != nil {
+			if errors.Is(err, astiav.ErrEof) || errors.Is(err, astiav.ErrEagain) {
+				break
+			}
+			c.onError(err, donut)
+			return
+		}
+		c.l.Infof("start filtering")
+		if err := c.filterAndEncode(s.decFrame, s, donut); err != nil {
+			c.onError(err, donut)
+			return
+		}
+	}
+}
+
 func (c *LibAVFFmpegStreamer) filterAndEncode(f *astiav.Frame, s *streamContext, donut *entities.DonutParameters) (err error) {
 	if err = s.buffersrcContext.BuffersrcAddFrame(f, astiav.NewBuffersrcFlags(astiav.BuffersrcFlagKeepRef)); err != nil {
 		return fmt.Errorf("adding frame failed: %w", err)
@@ -499,7 +594,7 @@ func (c *LibAVFFmpegStreamer) filterAndEncode(f *astiav.Frame, s *streamContext,
 		}
 		// TODO: should we avoid setting the picture type for audio?
 		s.filterFrame.SetPictureType(astiav.PictureTypeNone)
-
+		c.l.Infof("start encoding")
 		if err = c.encodeFrame(s.filterFrame, s, donut); err != nil {
 			err = fmt.Errorf("main: encoding and writing frame failed: %w", err)
 			return
@@ -520,6 +615,7 @@ func (c *LibAVFFmpegStreamer) encodeFrame(f *astiav.Frame, s *streamContext, don
 	}
 
 	for {
+		c.l.Infof("start receiving packet")
 		if err = s.encCodecContext.ReceivePacket(s.encPkt); err != nil {
 			if errors.Is(err, astiav.ErrEof) || errors.Is(err, astiav.ErrEagain) {
 				err = nil
@@ -535,6 +631,7 @@ func (c *LibAVFFmpegStreamer) encodeFrame(f *astiav.Frame, s *streamContext, don
 		isVideo := s.decCodecContext.MediaType() == astiav.MediaTypeVideo
 		if isVideo {
 			if donut.OnVideoFrame != nil {
+				c.l.Infof("sending transcoded video")
 				if err := donut.OnVideoFrame(s.encPkt.Data(), entities.MediaFrameContext{
 					PTS:      int(s.encPkt.Pts()),
 					DTS:      int(s.encPkt.Dts()),
@@ -548,6 +645,7 @@ func (c *LibAVFFmpegStreamer) encodeFrame(f *astiav.Frame, s *streamContext, don
 		isAudio := s.decCodecContext.MediaType() == astiav.MediaTypeAudio
 		if isAudio {
 			if donut.OnAudioFrame != nil {
+				c.l.Infof("sending transcoded audio")
 				if err := donut.OnAudioFrame(s.encPkt.Data(), entities.MediaFrameContext{
 					PTS:      int(s.encPkt.Pts()),
 					DTS:      int(s.encPkt.Dts()),

internal/controllers/webrtc_controller.go

@@ -42,14 +42,14 @@ func (c *WebRTCController) Setup(cancel context.CancelFunc, donutRecipe *entitie
 	response.Connection = peer
 
 	var videoTrack *webrtc.TrackLocalStaticSample
-	videoTrack, err = c.CreateTrack(peer, donutRecipe.Video.Codec, string(entities.VideoType), params.SRTStreamID)
+	videoTrack, err = c.CreateTrack(peer, donutRecipe.Video.Codec, string(entities.VideoType), params.StreamID)
 	if err != nil {
 		return nil, err
 	}
 	response.Video = videoTrack
 
 	var audioTrack *webrtc.TrackLocalStaticSample
-	audioTrack, err = c.CreateTrack(peer, donutRecipe.Audio.Codec, string(entities.AudioType), params.SRTStreamID)
+	audioTrack, err = c.CreateTrack(peer, donutRecipe.Audio.Codec, string(entities.AudioType), params.StreamID)
 	if err != nil {
 		return nil, err
 	}

internal/entities/entities.go

@@ -3,6 +3,7 @@ package entities
 import (
 	"context"
 	"fmt"
+	"strings"
 	"time"
 
 	"github.com/asticode/go-astiav"
@@ -27,6 +28,9 @@ type RequestParams struct {
 	SRTPort     uint16 `json:",string"`
 	SRTStreamID string
 	Offer       webrtc.SessionDescription
+
+	StreamURL string
+	StreamID  string
 }
 
 func (p *RequestParams) Valid() error {
@@ -34,16 +38,18 @@ func (p *RequestParams) Valid() error {
 		return ErrMissingParamsOffer
 	}
 
-	if p.SRTHost == "" {
-		return ErrMissingSRTHost
+	if p.StreamID == "" {
+		return ErrMissingStreamID
 	}
 
-	if p.SRTPort == 0 {
-		return ErrMissingSRTPort
+	if p.StreamURL == "" {
+		return ErrMissingStreamURL
 	}
+	isRTMP := strings.Contains(strings.ToLower(p.StreamURL), "rtmp")
+	isSRT := strings.Contains(strings.ToLower(p.StreamURL), "srt")
 
-	if p.SRTStreamID == "" {
-		return ErrMissingSRTStreamID
+	if !(isRTMP || isSRT) {
+		return ErrUnsupportedStreamURL
 	}
 
 	return nil
@@ -53,7 +59,7 @@ func (p *RequestParams) String() string {
 	if p == nil {
 		return ""
 	}
-	return fmt.Sprintf("ParamsOffer %v:%v/%v", p.SRTHost, p.SRTPort, p.SRTStreamID)
+	return fmt.Sprintf("RequestParams {StreamURL: %s, StreamID: %s}", p.StreamURL, p.StreamID)
 }
 
 type MessageType string
@@ -175,6 +181,8 @@ var DonutSRTStreamID DonutInputOptionKey = "srt_streamid"
 var DonutSRTsmoother DonutInputOptionKey = "smoother"
 var DonutSRTTranstype DonutInputOptionKey = "transtype"
 
+var DonutRTMPLive DonutInputOptionKey = "rtmp_live"
+
 type DonutInputFormat string
 
 func (d DonutInputFormat) String() string {

internal/entities/errors.go

@@ -9,6 +9,10 @@ var ErrHTTPGetOnly = errors.New("you must use http GET verb")
 var ErrHTTPPostOnly = errors.New("you must use http POST verb")
 var ErrMissingParamsOffer = errors.New("ParamsOffer must not be nil")
 
+var ErrMissingStreamURL = errors.New("stream URL must not be nil")
+var ErrMissingStreamID = errors.New("stream ID must not be nil")
+var ErrUnsupportedStreamURL = errors.New("unsupported stream")
+
 var ErrMissingSRTHost = errors.New("SRTHost must not be nil")
 var ErrMissingSRTPort = errors.New("SRTPort must be valid")
 var ErrMissingSRTStreamID = errors.New("SRTStreamID must not be empty")

internal/web/handlers/signaling.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"net/http"
+	"time"
 
 	"github.com/flavioribeiro/donut/internal/controllers"
 	"github.com/flavioribeiro/donut/internal/controllers/engine"
@@ -41,11 +42,13 @@ func (h *SignalingHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) err
 	if err != nil {
 		return err
 	}
+	h.l.Infof("createAndValidateParams %s", params.String())
 
 	donutEngine, err := h.donut.EngineFor(&params)
 	if err != nil {
 		return err
 	}
+	h.l.Infof("EngineFor %#v", donutEngine)
 
 	// server side media info
 	serverStreamInfo, err := donutEngine.ServerIngredients()
@@ -57,20 +60,30 @@ func (h *SignalingHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) err
 	if err != nil {
 		return err
 	}
+	h.l.Infof("ServerIngredients %#v", serverStreamInfo)
+	h.l.Infof("ClientIngredients %#v", clientStreamInfo)
 
-	donutRecipe := donutEngine.RecipeFor(serverStreamInfo, clientStreamInfo)
-	if donutRecipe == nil {
-		return entities.ErrMissingCompatibleStreams
+	donutRecipe, err := donutEngine.RecipeFor(serverStreamInfo, clientStreamInfo)
+	h.l.Info("after RecipeFor")
+	h.l.Info("after RecipeFor err", err)
+	h.l.Info("after RecipeFor donutRecipe", donutRecipe)
+	if err != nil {
+		return err
 	}
+	h.l.Infof("RecipeFor %#v", donutRecipe)
 
 	// We can't defer calling cancel here because it'll live alongside the stream.
 	ctx, cancel := context.WithCancel(context.Background())
 	webRTCResponse, err := h.webRTCController.Setup(cancel, donutRecipe, params)
+	h.l.Infof("webRTCController.Setup %#v, err=%#v", webRTCResponse, err)
 	if err != nil {
 		cancel()
 		return err
 	}
-
+	//tODO: add explan
+	h.l.Info("before sleeping")
+	time.Sleep(5 * time.Second)
+	h.l.Info("after sleeping")
 	go donutEngine.Serve(&entities.DonutParameters{
 		Cancel: cancel,
 		Ctx:    ctx,
@@ -85,13 +98,18 @@ func (h *SignalingHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) err
 			h.l.Errorw("error while streaming", "error", err)
 		},
 		OnStream: func(st *entities.Stream) error {
+			h.l.Infof("onstream %#v", st)
 			return h.webRTCController.SendMetadata(webRTCResponse.Data, st)
 		},
 		OnVideoFrame: func(data []byte, c entities.MediaFrameContext) error {
+			// sl[len(sl)-1]
+			h.l.Infof("OnVideoFrame %#v < %d > First %#v Last %#v", c, len(data), data[0:7], data[len(data)-7:])
 			return h.webRTCController.SendMediaSample(webRTCResponse.Video, data, c)
 		},
 		OnAudioFrame: func(data []byte, c entities.MediaFrameContext) error {
-			return h.webRTCController.SendMediaSample(webRTCResponse.Audio, data, c)
+			h.l.Infof("OnAudioFrame %#v", c)
+			return nil
+			// return h.webRTCController.SendMediaSample(webRTCResponse.Audio, data, c)
 		},
 	})
 
@@ -99,6 +117,7 @@ func (h *SignalingHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) err
 	w.WriteHeader(http.StatusOK)
 
 	err = json.NewEncoder(w).Encode(*webRTCResponse.LocalSDP)
+	h.l.Infof("webRTCResponse %#v", webRTCResponse)
 	if err != nil {
 		cancel()
 		return err

notes_bitstream_filter.txt

@@ -0,0 +1,26 @@
+docker run -it --rm  --entrypoint bash jrottenberg/ffmpeg:5.1.4-ubuntu2204
+
+ffmpeg -bsfs | grep annex
+# h264_mp4toannexb
+# hevc_mp4toannexb
+
+
+live_flv : In case of live network streams, if you force format, you may use live_flv option instead of flv to survive timestamp discontinuities.
+
+-f live_flv
+
+ff_live_flv_demuxer
+
+ff_flv_demuxer
+
+ffmpeg -h demuxer=live_flv
+ffmpeg -h bsf=h264_mp4toannexb
+
+example:
+
+https://github.com/FFmpeg/FFmpeg/blob/9c6c4f3d476d7a8d423ec3b954254c6a67ebc792/libavformat/mux.c#L1351
+https://github.com/search?q=repo%3AFFmpeg%2FFFmpeg%20ff_stream_add_bitstream_filter&type=code
+
+Good explanaation
+https://stackoverflow.com/questions/24884827/possible-locations-for-sequence-picture-parameter-sets-for-h-264-stream/24890903#24890903
+Filter impl https://github.com/FFmpeg/FFmpeg/blob/9c6c4f3d476d7a8d423ec3b954254c6a67ebc792/libavcodec/bsf/h264_mp4toannexb.c#L276

scripts/ffmpeg_mpegts_udp.sh

@@ -2,6 +2,7 @@ ffmpeg -hide_banner -loglevel verbose \
     -re -f lavfi -i testsrc2=size=1280x720:rate=30,format=yuv420p \
     -f lavfi -i sine=frequency=1000:sample_rate=44100 \
     -c:v libx264 -preset veryfast -tune zerolatency -profile:v baseline \
+    -vf "drawtext=text='SRT streaming':box=1:boxborderw=10:x=(w-text_w)/2:y=(h-text_h)/2:fontsize=128:fontcolor=black" \
     -b:v 1000k -bufsize 2000k -x264opts keyint=30:min-keyint=30:scenecut=-1 \
     -c:a aac -b:a 128k \
     -f mpegts "udp://${SRT_INPUT_HOST}:${SRT_INPUT_PORT}?pkt_size=${PKT_SIZE}"

scripts/ffmpeg_rtmp.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+while true
+do
+    ffmpeg -hide_banner -loglevel debug \
+        -re -f lavfi -i testsrc2=size=1280x720:rate=30,format=yuv420p \
+        -f lavfi -i sine=frequency=1000:sample_rate=44100 \
+        -c:v libx264 -preset veryfast -tune zerolatency -profile:v baseline \
+        -vf "drawtext=text='RTMP streaming':box=1:boxborderw=10:x=(w-text_w)/2:y=(h-text_h)/2:fontsize=128:fontcolor=black" \
+        -bsf:v h264_mp4toannexb \
+        -b:v 1000k -bufsize 2000k -x264opts keyint=30:min-keyint=30:scenecut=-1 \
+        -c:a aac -b:a 128k \
+        -f flv -listen 1 -rtmp_live live "rtmp://${RTMP_HOST}:${RTMP_PORT}/live/app"
+done

static/demo.js

@@ -2,15 +2,13 @@
 window.metadataMessages = {}
 
 window.startSession = () => {
-  let srtHost = document.getElementById('srt-host').value;
-  let srtPort = document.getElementById('srt-port').value;
-  let srtStreamId = document.getElementById('srt-stream-id').value;
+  let streamURL = document.getElementById('stream-url').value;
+  let streamID = document.getElementById('stream-id').value;
 
   setupWebRTC((pc, offer) => {
     let srtFullAddress = JSON.stringify({
-      "srtHost": srtHost,
-      "srtPort": srtPort,
-      "srtStreamId": srtStreamId,
+      "streamURL": streamURL,
+      "streamID": streamID,
       offer
     });
 
@@ -142,7 +140,9 @@ const log = (msg, level = "info") => {
   const el = document.createElement("p")
 
   if (typeof(msg) !== "string") {
+    orig = msg
     msg = "unknown log msg type " + typeof(msg)
+    msg = msg + " [" + orig + "]"
     level = "error"
   }
 

static/index.html

@@ -8,15 +8,13 @@
 
 <body>
 
-	<h1>SRT Config</h1>
-	<b> SRT Host </b>
-	<input type="text" id="srt-host" value="srt"> <br />
+	<h1>Remote streaming</h1>
+	<b> URL </b>
+	<input type="text" id="stream-url" value="srt://srt:40052"> <br />
 
-	<b> SRT Port </b>
-	<input type="text" id="srt-port" value="40052" /> <br />
+	<b> ID </b>
+	<input type="text" id="stream-id" value="stream-id" /> <br />
 
-	<b> SRT Stream ID </b>
-	<input type="text" id="srt-stream-id" value="stream-id" /> <br />
 	<button onclick="onConnect()"> Connect </button>
 
 	<h1>Video</h1>
@@ -40,26 +38,9 @@
 	}
 
 	docReady(function () {
-		const queryString = window.location.search;
-		const urlParams = new URLSearchParams(queryString);
-
 		window.onConnect = () => {
 			window.startSession();
 		}
-
-		if (urlParams.has('srtHost')) {
-			document.getElementById('srt-host').value = urlParams.get('srtHost');
-		}
-		if (urlParams.has('srtPort')) {
-			document.getElementById('srt-port').value = urlParams.get('srtPort');
-		}
-		if (urlParams.has('srtStreamId')) {
-			document.getElementById('srt-stream-id').value = urlParams.get('srtStreamId');
-		}
-
-		if (urlParams.get('autoplay') === "true") {
-			onConnect();
-		}
 	});
 </script>