]> git.sesse.net Git - nageru/blobdiff - nageru/flags.cpp
Implement SRT output.
[nageru] / nageru / flags.cpp
index 3c1575589b6a33169e1f922c9eb726fd55218188..965cdc7402d5aeac372fbadc9e618f7dacb4037e 100644 (file)
@@ -51,6 +51,11 @@ enum LongOption {
        OPTION_HTTP_PORT,
        OPTION_SRT_PORT,
        OPTION_NO_SRT,
+       OPTION_SRT_DESTINATION,
+       OPTION_SRT_STREAMID,
+       OPTION_SRT_PASSPHRASE,
+       OPTION_SRT_YOUTUBE_STREAM_KEY,
+       OPTION_SRT_LATENCY,
        OPTION_NO_TRANSCODE_VIDEO,
        OPTION_NO_TRANSCODE_AUDIO,
        OPTION_DISABLE_AUDIO,
@@ -186,7 +191,7 @@ void usage(Program program)
                fprintf(stderr, "      --x264-separate-disk-param=NAME[,VALUE] set any x264 parameter, for fine tuning\n");
        }
 #ifdef HAVE_AV1
-       fprintf(stderr, "      --http-av1-video            send AV1-compressed video to HTTP clients\n");
+       fprintf(stderr, "      --http-av1-video            send AV1-compressed video to HTTP clients and SRT output\n");
        fprintf(stderr, "      --av1-preset                SVT-AV1 quality preset (default %d, from -2 to 13)\n",
                DEFAULT_AV1_PRESET);
        fprintf(stderr, "      --av1-bitrate               AV1 bitrate (in kilobit/sec, default %d)\n",
@@ -196,9 +201,9 @@ void usage(Program program)
        fprintf(stderr, "      --av1-param=NAME[,VALUE]    set any SVT-AV1 parameter, for fine tuning\n");
 #endif
        fprintf(stderr, "      --http-mux=NAME             mux to use for HTTP streams (default " DEFAULT_STREAM_MUX_NAME ")\n");
-       fprintf(stderr, "      --http-audio-codec=NAME     audio codec to use for HTTP streams\n");
+       fprintf(stderr, "      --http-audio-codec=NAME     audio codec to use for HTTP streams and SRT output\n");
        fprintf(stderr, "                                  (default is to use the same as for the recording)\n");
-       fprintf(stderr, "      --http-audio-bitrate=KBITS  audio codec bit rate to use for HTTP streams\n");
+       fprintf(stderr, "      --http-audio-bitrate=KBITS  audio codec bit rate to use for HTTP streams and SRT output\n");
        fprintf(stderr, "                                  (default is %d, ignored unless --http-audio-codec is set)\n",
                DEFAULT_AUDIO_OUTPUT_BIT_RATE / 1000);
        fprintf(stderr, "      --http-port=PORT            which port to use for the built-in HTTP server\n");
@@ -216,6 +221,15 @@ void usage(Program program)
                fprintf(stderr, "      --disable-audio             do not include any audio in the stream\n");
        }
        if (program == PROGRAM_NAGERU) {
+#ifdef HAVE_SRT
+               fprintf(stderr, "      --srt-destination=HOST:PORT  send HTTP video stream also to given destination\n");
+               fprintf(stderr, "      --srt-streamid=STREAMID     SRT stream identifying ID\n");
+               fprintf(stderr, "      --srt-passphrase=PASSPHRASE  SRT encryption key\n");
+               fprintf(stderr, "      --srt-youtube-stream-key=KEY  shortcut for --srt-destination=a.srt.youtube.com:2010\n");
+               fprintf(stderr, "                                    --srt-streamid=#!::u=<KEY>,copy=0,encoder=Nageru\n");
+               fprintf(stderr, "      --srt-latency=MS            output SRT latency in milliseconds (default is %d)\n", DEFAULT_SRT_OUTPUT_LATENCY_MS);
+               fprintf(stderr, "                                    --srt-streamid=#!::u=<KEY>,copy=0,encoder=Nageru\n");
+#endif
                fprintf(stderr, "      --flat-audio                start with most audio processing turned off\n");
                fprintf(stderr, "                                    (can be overridden by e.g. --enable-limiter)\n");
                fprintf(stderr, "      --gain-staging=DB           set initial gain staging to the given value\n");
@@ -306,6 +320,13 @@ void parse_flags(Program program, int argc, char * const argv[])
                { "srt-port", required_argument, 0, OPTION_SRT_PORT },
 #endif
                { "no-srt", no_argument, 0, OPTION_NO_SRT },  // We silently allow this even without HAVE_SRT.
+#ifdef HAVE_SRT
+               { "srt-destination", required_argument, 0, OPTION_SRT_DESTINATION },
+               { "srt-streamid", required_argument, 0, OPTION_SRT_STREAMID },
+               { "srt-passphrase", required_argument, 0, OPTION_SRT_PASSPHRASE },
+               { "srt-youtube-stream-key", required_argument, 0, OPTION_SRT_YOUTUBE_STREAM_KEY },
+               { "srt-latency", required_argument, 0, OPTION_SRT_LATENCY },
+#endif
                { "no-transcode-video", no_argument, 0, OPTION_NO_TRANSCODE_VIDEO },
                { "no-transcode-audio", no_argument, 0, OPTION_NO_TRANSCODE_AUDIO },
                { "disable-audio", no_argument, 0, OPTION_DISABLE_AUDIO },
@@ -446,6 +467,37 @@ void parse_flags(Program program, int argc, char * const argv[])
                case OPTION_NO_SRT:
                        global_flags.srt_port = -1;
                        break;
+#ifdef HAVE_SRT
+               case OPTION_SRT_DESTINATION: {
+                       const char *ptr = strrchr(optarg, ':');
+                       if (ptr == nullptr || strlen(optarg) < 3) {
+                               fprintf(stderr, "ERROR: --srt-destination must be of the form host:port\n");
+                               exit(1);
+                       }
+                       global_flags.srt_destination_host = string(optarg, ptr - optarg);
+                       if (global_flags.srt_destination_host[0] == '[' &&
+                           global_flags.srt_destination_host.back() == ']') {
+                               // Support [IPv6]:port, in a sort of hackish way.
+                               global_flags.srt_destination_host = global_flags.srt_destination_host.substr(1, global_flags.srt_destination_host.size() - 2);
+                       }
+                       global_flags.srt_destination_port = ptr + 1;
+                       break;
+               }
+               case OPTION_SRT_STREAMID:
+                       global_flags.srt_streamid = optarg;
+                       break;
+               case OPTION_SRT_PASSPHRASE:
+                       global_flags.srt_passphrase = optarg;
+                       break;
+               case OPTION_SRT_YOUTUBE_STREAM_KEY:
+                       global_flags.srt_destination_host = "a.srt.youtube.com";
+                       global_flags.srt_destination_port = "2010";
+                       global_flags.srt_streamid = string("#!::u=") + optarg + ",copy=0,encoder=Nageru " NAGERU_VERSION;
+                       break;
+               case OPTION_SRT_LATENCY:
+                       global_flags.srt_output_latency = atoi(optarg);
+                       break;
+#endif
                case OPTION_NO_TRANSCODE_VIDEO:
                        global_flags.transcode_video = false;
                        break;
@@ -831,4 +883,9 @@ void parse_flags(Program program, int argc, char * const argv[])
                        global_flags.card_to_mjpeg_stream_export[card_idx] = card_idx;
                }
        }
+
+       if (global_flags.srt_destination_host == "a.srt.youtube.com" && global_flags.srt_passphrase.empty()) {
+               fprintf(stderr, "ERROR: Cannot stream to YouTube without --srt-passphrase (get it from the YouTube streaming console)\n");
+               exit(1);
+       }
 }