14 // Long options that have no corresponding short option.
20 OPTION_DEFAULT_HDMI_INPUT,
21 OPTION_FAKE_CARDS_AUDIO,
22 OPTION_HTTP_UNCOMPRESSED_VIDEO,
23 OPTION_HTTP_X264_VIDEO,
24 OPTION_RECORD_X264_VIDEO,
27 OPTION_X264_SPEEDCONTROL,
28 OPTION_X264_SPEEDCONTROL_VERBOSE,
31 OPTION_X264_VBV_BUFSIZE,
32 OPTION_X264_VBV_MAX_BITRATE,
35 OPTION_HTTP_COARSE_TIMEBASE,
36 OPTION_HTTP_AUDIO_CODEC,
37 OPTION_HTTP_AUDIO_BITRATE,
39 OPTION_NO_TRANSCODE_AUDIO,
44 OPTION_DISABLE_GAIN_STAGING_AUTO,
45 OPTION_ENABLE_GAIN_STAGING_AUTO,
46 OPTION_DISABLE_COMPRESSOR,
47 OPTION_ENABLE_COMPRESSOR,
48 OPTION_DISABLE_LIMITER,
49 OPTION_ENABLE_LIMITER,
50 OPTION_DISABLE_MAKEUP_GAIN_AUTO,
51 OPTION_ENABLE_MAKEUP_GAIN_AUTO,
52 OPTION_DISABLE_ALSA_OUTPUT,
54 OPTION_PRINT_VIDEO_LATENCY,
55 OPTION_MAX_INPUT_QUEUE_FRAMES,
56 OPTION_AUDIO_QUEUE_LENGTH_MS,
57 OPTION_OUTPUT_YCBCR_COEFFICIENTS,
58 OPTION_OUTPUT_BUFFER_FRAMES,
59 OPTION_OUTPUT_SLOP_FRAMES,
60 OPTION_TIMECODE_STREAM,
61 OPTION_TIMECODE_STDOUT,
62 OPTION_QUICK_CUT_KEYS,
65 OPTION_INPUT_YCBCR_INTERPRETATION,
68 void usage(Program program)
70 if (program == PROGRAM_KAERU) {
71 fprintf(stderr, "Usage: kaeru [OPTION]... SOURCE_URL\n");
73 fprintf(stderr, "Usage: nageru [OPTION]...\n");
75 fprintf(stderr, "\n");
76 fprintf(stderr, " --help print usage information\n");
77 if (program == PROGRAM_NAGERU) {
78 fprintf(stderr, " --fullscreen run in full screen, with no decorations\n");
80 fprintf(stderr, " -w, --width output width in pixels (default 1280)\n");
81 fprintf(stderr, " -h, --height output height in pixels (default 720)\n");
82 if (program == PROGRAM_NAGERU) {
83 fprintf(stderr, " -c, --num-cards set number of input cards (default 2)\n");
84 fprintf(stderr, " -o, --output-card=CARD also output signal to the given card (default none)\n");
85 fprintf(stderr, " -t, --theme=FILE choose theme (default theme.lua)\n");
86 fprintf(stderr, " -I, --theme-dir=DIR search for theme in this directory (can be given multiple times)\n");
87 fprintf(stderr, " -r, --recording-dir=DIR where to store disk recording\n");
88 fprintf(stderr, " -v, --va-display=SPEC VA-API device for H.264 encoding\n");
89 fprintf(stderr, " ($DISPLAY spec or /dev/dri/render* path)\n");
90 fprintf(stderr, " -m, --map-signal=SIGNAL,CARD set a default card mapping (can be given multiple times)\n");
91 fprintf(stderr, " -M, --input-mapping=FILE start with the given audio input mapping (implies --multichannel)\n");
92 fprintf(stderr, " --multichannel start in multichannel audio mapping mode\n");
93 fprintf(stderr, " --midi-mapping=FILE start with the given MIDI controller mapping (implies --multichannel)\n");
94 fprintf(stderr, " --default-hdmi-input default to HDMI over SDI inputs for cards that have both\n");
95 fprintf(stderr, " --fake-cards-audio make fake (disconnected) cards output a simple tone\n");
96 fprintf(stderr, " --http-uncompressed-video send uncompressed NV12 video to HTTP clients\n");
97 fprintf(stderr, " --http-x264-video send x264-compressed video to HTTP clients\n");
98 fprintf(stderr, " --record-x264-video store x264-compressed video to disk (implies --http-x264-video,\n");
99 fprintf(stderr, " removes the need for working VA-API encoding)\n");
101 fprintf(stderr, " --x264-preset x264 quality preset (default " X264_DEFAULT_PRESET ")\n");
102 fprintf(stderr, " --x264-tune x264 tuning (default " X264_DEFAULT_TUNE ", can be blank)\n");
103 fprintf(stderr, " --x264-speedcontrol try to match x264 preset to available CPU speed\n");
104 fprintf(stderr, " --x264-speedcontrol-verbose output speedcontrol debugging statistics\n");
105 fprintf(stderr, " --x264-bitrate x264 bitrate (in kilobit/sec, default %d)\n",
106 DEFAULT_X264_OUTPUT_BIT_RATE);
107 fprintf(stderr, " --x264-crf=VALUE quality-based VBR (-12 to 51), incompatible with --x264-bitrate and VBV\n");
108 fprintf(stderr, " --x264-vbv-bufsize x264 VBV size (in kilobits, 0 = one-frame VBV,\n");
109 fprintf(stderr, " default: same as --x264-bitrate, that is, one-second VBV)\n");
110 fprintf(stderr, " --x264-vbv-max-bitrate x264 local max bitrate (in kilobit/sec per --vbv-bufsize,\n");
111 fprintf(stderr, " 0 = no limit, default: same as --x264-bitrate, i.e., CBR)\n");
112 fprintf(stderr, " --x264-param=NAME[,VALUE] set any x264 parameter, for fine tuning\n");
113 fprintf(stderr, " --http-mux=NAME mux to use for HTTP streams (default " DEFAULT_STREAM_MUX_NAME ")\n");
114 fprintf(stderr, " --http-audio-codec=NAME audio codec to use for HTTP streams\n");
115 fprintf(stderr, " (default is to use the same as for the recording)\n");
116 fprintf(stderr, " --http-audio-bitrate=KBITS audio codec bit rate to use for HTTP streams\n");
117 fprintf(stderr, " (default is %d, ignored unless --http-audio-codec is set)\n",
118 DEFAULT_AUDIO_OUTPUT_BIT_RATE / 1000);
119 fprintf(stderr, " --http-port=PORT which port to use for the built-in HTTP server\n");
120 fprintf(stderr, " (default is %d)\n", DEFAULT_HTTPD_PORT);
121 if (program == PROGRAM_KAERU) {
122 fprintf(stderr, " --no-transcode-audio copy encoded audio raw from the source stream\n");
123 fprintf(stderr, " (requires --http-audio-codec= to be set)\n");
125 if (program == PROGRAM_NAGERU) {
126 fprintf(stderr, " --flat-audio start with most audio processing turned off\n");
127 fprintf(stderr, " (can be overridden by e.g. --enable-limiter)\n");
128 fprintf(stderr, " --gain-staging=DB set initial gain staging to the given value\n");
129 fprintf(stderr, " (--disable-gain-staging-auto)\n");
130 fprintf(stderr, " --disable-locut turn off locut filter (also --enable)\n");
131 fprintf(stderr, " --disable-gain-staging-auto turn off automatic gain staging (also --enable)\n");
132 fprintf(stderr, " --disable-compressor turn off regular compressor (also --enable)\n");
133 fprintf(stderr, " --disable-limiter turn off limiter (also --enable)\n");
134 fprintf(stderr, " --disable-makeup-gain-auto turn off auto-adjustment of final makeup gain (also --enable)\n");
135 fprintf(stderr, " --disable-alsa-output disable audio monitoring via ALSA\n");
136 fprintf(stderr, " --no-flush-pbos do not explicitly signal texture data uploads\n");
137 fprintf(stderr, " (will give display corruption, but makes it\n");
138 fprintf(stderr, " possible to run with apitrace in real time)\n");
139 fprintf(stderr, " --print-video-latency print out measurements of video latency on stdout\n");
140 fprintf(stderr, " --max-input-queue-frames=FRAMES never keep more than FRAMES frames for each card\n");
141 fprintf(stderr, " (default 6, minimum 1)\n");
142 fprintf(stderr, " --audio-queue-length-ms=MS length of audio resampling queue (default 100.0)\n");
143 fprintf(stderr, " --output-ycbcr-coefficients={rec601,rec709,auto}\n");
144 fprintf(stderr, " Y'CbCr coefficient standard of output (default auto)\n");
145 fprintf(stderr, " auto is rec601, unless --output-card is used\n");
146 fprintf(stderr, " and a Rec. 709 mode (typically HD modes) is in use\n");
147 fprintf(stderr, " --output-buffer-frames=NUM number of frames in output buffer for --output-card,\n");
148 fprintf(stderr, " can be fractional (default 6.0); note also\n");
149 fprintf(stderr, " the audio queue can't be much longer than this\n");
150 fprintf(stderr, " --output-slop-frames=NUM if more less than this number of frames behind for\n");
151 fprintf(stderr, " --output-card, try to submit anyway instead of\n");
152 fprintf(stderr, " dropping the frame (default 0.5)\n");
153 fprintf(stderr, " --timecode-stream show timestamp and timecode in stream\n");
154 fprintf(stderr, " --timecode-stdout show timestamp and timecode on standard output\n");
155 fprintf(stderr, " --quick-cut-keys enable direct cutting by Q, W, E, ... keys\n");
156 fprintf(stderr, " --10-bit-input use 10-bit video input (requires compute shaders)\n");
157 fprintf(stderr, " --10-bit-output use 10-bit video output (requires compute shaders,\n");
158 fprintf(stderr, " implies --record-x264-video)\n");
159 fprintf(stderr, " --input-ycbcr-interpretation=CARD,{rec601,rec709,auto}[,{limited,full}]\n");
160 fprintf(stderr, " Y'CbCr coefficient standard of card CARD (default auto)\n");
161 fprintf(stderr, " auto is rec601 for SD, rec709 for HD, always limited\n");
162 fprintf(stderr, " limited means standard 0-240/0-235 input range (for 8-bit)\n");
166 void parse_flags(Program program, int argc, char * const argv[])
168 static const option long_options[] = {
169 { "help", no_argument, 0, OPTION_HELP },
170 { "fullscreen", no_argument, 0, OPTION_FULLSCREEN },
171 { "width", required_argument, 0, 'w' },
172 { "height", required_argument, 0, 'h' },
173 { "num-cards", required_argument, 0, 'c' },
174 { "output-card", required_argument, 0, 'o' },
175 { "theme", required_argument, 0, 't' },
176 { "theme-dir", required_argument, 0, 'I' },
177 { "recording-dir", required_argument, 0, 'r' },
178 { "map-signal", required_argument, 0, 'm' },
179 { "input-mapping", required_argument, 0, 'M' },
180 { "va-display", required_argument, 0, 'v' },
181 { "multichannel", no_argument, 0, OPTION_MULTICHANNEL },
182 { "midi-mapping", required_argument, 0, OPTION_MIDI_MAPPING },
183 { "default-hdmi-input", no_argument, 0, OPTION_DEFAULT_HDMI_INPUT },
184 { "fake-cards-audio", no_argument, 0, OPTION_FAKE_CARDS_AUDIO },
185 { "http-uncompressed-video", no_argument, 0, OPTION_HTTP_UNCOMPRESSED_VIDEO },
186 { "http-x264-video", no_argument, 0, OPTION_HTTP_X264_VIDEO },
187 { "record-x264-video", no_argument, 0, OPTION_RECORD_X264_VIDEO },
188 { "x264-preset", required_argument, 0, OPTION_X264_PRESET },
189 { "x264-tune", required_argument, 0, OPTION_X264_TUNE },
190 { "x264-speedcontrol", no_argument, 0, OPTION_X264_SPEEDCONTROL },
191 { "x264-speedcontrol-verbose", no_argument, 0, OPTION_X264_SPEEDCONTROL_VERBOSE },
192 { "x264-bitrate", required_argument, 0, OPTION_X264_BITRATE },
193 { "x264-crf", required_argument, 0, OPTION_X264_CRF },
194 { "x264-vbv-bufsize", required_argument, 0, OPTION_X264_VBV_BUFSIZE },
195 { "x264-vbv-max-bitrate", required_argument, 0, OPTION_X264_VBV_MAX_BITRATE },
196 { "x264-param", required_argument, 0, OPTION_X264_PARAM },
197 { "http-mux", required_argument, 0, OPTION_HTTP_MUX },
198 { "http-audio-codec", required_argument, 0, OPTION_HTTP_AUDIO_CODEC },
199 { "http-audio-bitrate", required_argument, 0, OPTION_HTTP_AUDIO_BITRATE },
200 { "http-port", required_argument, 0, OPTION_HTTP_PORT },
201 { "no-transcode-audio", no_argument, 0, OPTION_NO_TRANSCODE_AUDIO },
202 { "flat-audio", no_argument, 0, OPTION_FLAT_AUDIO },
203 { "gain-staging", required_argument, 0, OPTION_GAIN_STAGING },
204 { "disable-locut", no_argument, 0, OPTION_DISABLE_LOCUT },
205 { "enable-locut", no_argument, 0, OPTION_ENABLE_LOCUT },
206 { "disable-gain-staging-auto", no_argument, 0, OPTION_DISABLE_GAIN_STAGING_AUTO },
207 { "enable-gain-staging-auto", no_argument, 0, OPTION_ENABLE_GAIN_STAGING_AUTO },
208 { "disable-compressor", no_argument, 0, OPTION_DISABLE_COMPRESSOR },
209 { "enable-compressor", no_argument, 0, OPTION_ENABLE_COMPRESSOR },
210 { "disable-limiter", no_argument, 0, OPTION_DISABLE_LIMITER },
211 { "enable-limiter", no_argument, 0, OPTION_ENABLE_LIMITER },
212 { "disable-makeup-gain-auto", no_argument, 0, OPTION_DISABLE_MAKEUP_GAIN_AUTO },
213 { "enable-makeup-gain-auto", no_argument, 0, OPTION_ENABLE_MAKEUP_GAIN_AUTO },
214 { "disable-alsa-output", no_argument, 0, OPTION_DISABLE_ALSA_OUTPUT },
215 { "no-flush-pbos", no_argument, 0, OPTION_NO_FLUSH_PBOS },
216 { "print-video-latency", no_argument, 0, OPTION_PRINT_VIDEO_LATENCY },
217 { "max-input-queue-frames", required_argument, 0, OPTION_MAX_INPUT_QUEUE_FRAMES },
218 { "audio-queue-length-ms", required_argument, 0, OPTION_AUDIO_QUEUE_LENGTH_MS },
219 { "output-ycbcr-coefficients", required_argument, 0, OPTION_OUTPUT_YCBCR_COEFFICIENTS },
220 { "output-buffer-frames", required_argument, 0, OPTION_OUTPUT_BUFFER_FRAMES },
221 { "output-slop-frames", required_argument, 0, OPTION_OUTPUT_SLOP_FRAMES },
222 { "timecode-stream", no_argument, 0, OPTION_TIMECODE_STREAM },
223 { "timecode-stdout", no_argument, 0, OPTION_TIMECODE_STDOUT },
224 { "quick-cut-keys", no_argument, 0, OPTION_QUICK_CUT_KEYS },
225 { "10-bit-input", no_argument, 0, OPTION_10_BIT_INPUT },
226 { "10-bit-output", no_argument, 0, OPTION_10_BIT_OUTPUT },
227 { "input-ycbcr-interpretation", required_argument, 0, OPTION_INPUT_YCBCR_INTERPRETATION },
230 vector<string> theme_dirs;
231 string output_ycbcr_coefficients = "auto";
233 int option_index = 0;
234 int c = getopt_long(argc, argv, "c:t:I:r:v:m:M:w:h:", long_options, &option_index);
241 global_flags.width = atoi(optarg);
244 global_flags.height = atoi(optarg);
247 global_flags.num_cards = atoi(optarg);
250 global_flags.output_card = atoi(optarg);
253 global_flags.theme_filename = optarg;
256 theme_dirs.push_back(optarg);
259 global_flags.recording_dir = optarg;
262 char *ptr = strchr(optarg, ',');
263 if (ptr == nullptr) {
264 fprintf(stderr, "ERROR: Invalid argument '%s' to --map-signal (needs a signal and a card number, separated by comma)\n", optarg);
268 const int signal_num = atoi(optarg);
269 const int card_num = atoi(ptr + 1);
270 if (global_flags.default_stream_mapping.count(signal_num)) {
271 fprintf(stderr, "ERROR: Signal %d already mapped to card %d\n",
272 signal_num, global_flags.default_stream_mapping[signal_num]);
275 global_flags.default_stream_mapping[signal_num] = card_num;
279 global_flags.input_mapping_filename = optarg;
281 case OPTION_MULTICHANNEL:
282 global_flags.multichannel_mapping_mode = true;
285 global_flags.va_display = optarg;
287 case OPTION_MIDI_MAPPING:
288 global_flags.midi_mapping_filename = optarg;
289 global_flags.multichannel_mapping_mode = true;
291 case OPTION_DEFAULT_HDMI_INPUT:
292 global_flags.default_hdmi_input = true;
294 case OPTION_FAKE_CARDS_AUDIO:
295 global_flags.fake_cards_audio = true;
297 case OPTION_HTTP_UNCOMPRESSED_VIDEO:
298 global_flags.uncompressed_video_to_http = true;
300 case OPTION_HTTP_MUX:
301 global_flags.stream_mux_name = optarg;
303 case OPTION_HTTP_AUDIO_CODEC:
304 global_flags.stream_audio_codec_name = optarg;
306 case OPTION_HTTP_AUDIO_BITRATE:
307 global_flags.stream_audio_codec_bitrate = atoi(optarg) * 1000;
309 case OPTION_HTTP_PORT:
310 global_flags.http_port = atoi(optarg);
312 case OPTION_NO_TRANSCODE_AUDIO:
313 global_flags.transcode_audio = false;
315 case OPTION_HTTP_X264_VIDEO:
316 global_flags.x264_video_to_http = true;
318 case OPTION_RECORD_X264_VIDEO:
319 global_flags.x264_video_to_disk = true;
320 global_flags.x264_video_to_http = true;
322 case OPTION_X264_PRESET:
323 global_flags.x264_preset = optarg;
325 case OPTION_X264_TUNE:
326 global_flags.x264_tune = optarg;
328 case OPTION_X264_SPEEDCONTROL:
329 global_flags.x264_speedcontrol = true;
331 case OPTION_X264_SPEEDCONTROL_VERBOSE:
332 global_flags.x264_speedcontrol_verbose = true;
334 case OPTION_X264_BITRATE:
335 global_flags.x264_bitrate = atoi(optarg);
337 case OPTION_X264_CRF:
338 global_flags.x264_crf = atof(optarg);
340 case OPTION_X264_VBV_BUFSIZE:
341 global_flags.x264_vbv_buffer_size = atoi(optarg);
343 case OPTION_X264_VBV_MAX_BITRATE:
344 global_flags.x264_vbv_max_bitrate = atoi(optarg);
346 case OPTION_X264_PARAM:
347 global_flags.x264_extra_param.push_back(optarg);
349 case OPTION_FLAT_AUDIO:
350 // If --flat-audio is given, turn off everything that messes with the sound,
351 // except the final makeup gain.
352 global_flags.locut_enabled = false;
353 global_flags.gain_staging_auto = false;
354 global_flags.compressor_enabled = false;
355 global_flags.limiter_enabled = false;
357 case OPTION_GAIN_STAGING:
358 global_flags.initial_gain_staging_db = atof(optarg);
359 global_flags.gain_staging_auto = false;
361 case OPTION_DISABLE_LOCUT:
362 global_flags.locut_enabled = false;
364 case OPTION_ENABLE_LOCUT:
365 global_flags.locut_enabled = true;
367 case OPTION_DISABLE_GAIN_STAGING_AUTO:
368 global_flags.gain_staging_auto = false;
370 case OPTION_ENABLE_GAIN_STAGING_AUTO:
371 global_flags.gain_staging_auto = true;
373 case OPTION_DISABLE_COMPRESSOR:
374 global_flags.compressor_enabled = false;
376 case OPTION_ENABLE_COMPRESSOR:
377 global_flags.compressor_enabled = true;
379 case OPTION_DISABLE_LIMITER:
380 global_flags.limiter_enabled = false;
382 case OPTION_ENABLE_LIMITER:
383 global_flags.limiter_enabled = true;
385 case OPTION_DISABLE_MAKEUP_GAIN_AUTO:
386 global_flags.final_makeup_gain_auto = false;
388 case OPTION_ENABLE_MAKEUP_GAIN_AUTO:
389 global_flags.final_makeup_gain_auto = true;
391 case OPTION_DISABLE_ALSA_OUTPUT:
392 global_flags.enable_alsa_output = false;
394 case OPTION_NO_FLUSH_PBOS:
395 global_flags.flush_pbos = false;
397 case OPTION_PRINT_VIDEO_LATENCY:
398 global_flags.print_video_latency = true;
400 case OPTION_MAX_INPUT_QUEUE_FRAMES:
401 global_flags.max_input_queue_frames = atoi(optarg);
403 case OPTION_AUDIO_QUEUE_LENGTH_MS:
404 global_flags.audio_queue_length_ms = atof(optarg);
406 case OPTION_OUTPUT_YCBCR_COEFFICIENTS:
407 output_ycbcr_coefficients = optarg;
409 case OPTION_OUTPUT_BUFFER_FRAMES:
410 global_flags.output_buffer_frames = atof(optarg);
412 case OPTION_OUTPUT_SLOP_FRAMES:
413 global_flags.output_slop_frames = atof(optarg);
415 case OPTION_TIMECODE_STREAM:
416 global_flags.display_timecode_in_stream = true;
418 case OPTION_TIMECODE_STDOUT:
419 global_flags.display_timecode_on_stdout = true;
421 case OPTION_QUICK_CUT_KEYS:
422 global_flags.enable_quick_cut_keys = true;
424 case OPTION_10_BIT_INPUT:
425 global_flags.ten_bit_input = true;
427 case OPTION_10_BIT_OUTPUT:
428 global_flags.ten_bit_output = true;
429 global_flags.x264_video_to_disk = true;
430 global_flags.x264_video_to_http = true;
431 global_flags.x264_bit_depth = 10;
433 case OPTION_INPUT_YCBCR_INTERPRETATION: {
434 char *ptr = strchr(optarg, ',');
435 if (ptr == nullptr) {
436 fprintf(stderr, "ERROR: Invalid argument '%s' to --input-ycbcr-interpretation (needs a card and an interpretation, separated by comma)\n", optarg);
440 const int card_num = atoi(optarg);
441 if (card_num < 0 || card_num >= MAX_VIDEO_CARDS) {
442 fprintf(stderr, "ERROR: Invalid card number %d\n", card_num);
446 YCbCrInterpretation interpretation;
447 char *interpretation_str = ptr + 1;
448 ptr = strchr(interpretation_str, ',');
449 if (ptr != nullptr) {
451 const char *range = ptr + 1;
452 if (strcmp(range, "full") == 0) {
453 interpretation.full_range = true;
454 } else if (strcmp(range, "limited") == 0) {
455 interpretation.full_range = false;
457 fprintf(stderr, "ERROR: Invalid Y'CbCr range '%s' (must be “full” or “limited”)\n", range);
462 if (strcmp(interpretation_str, "rec601") == 0) {
463 interpretation.ycbcr_coefficients_auto = false;
464 interpretation.ycbcr_coefficients = movit::YCBCR_REC_601;
465 } else if (strcmp(interpretation_str, "rec709") == 0) {
466 interpretation.ycbcr_coefficients_auto = false;
467 interpretation.ycbcr_coefficients = movit::YCBCR_REC_709;
468 } else if (strcmp(interpretation_str, "auto") == 0) {
469 interpretation.ycbcr_coefficients_auto = true;
470 if (interpretation.full_range) {
471 fprintf(stderr, "ERROR: Cannot use “auto” Y'CbCr coefficients with full range\n");
475 fprintf(stderr, "ERROR: Invalid Y'CbCr coefficients '%s' (must be “rec601”, “rec709” or “auto”)\n", interpretation_str);
478 global_flags.ycbcr_interpretation[card_num] = interpretation;
481 case OPTION_FULLSCREEN:
482 global_flags.fullscreen = true;
488 fprintf(stderr, "Unknown option '%s'\n", argv[option_index]);
489 fprintf(stderr, "\n");
495 if (global_flags.uncompressed_video_to_http &&
496 global_flags.x264_video_to_http) {
497 fprintf(stderr, "ERROR: --http-uncompressed-video and --http-x264-video are mutually incompatible\n");
500 if (global_flags.num_cards <= 0) {
501 fprintf(stderr, "ERROR: --num-cards must be at least 1\n");
504 if (global_flags.output_card < -1 ||
505 global_flags.output_card >= global_flags.num_cards) {
506 fprintf(stderr, "ERROR: --output-card points to a nonexistant card\n");
509 if (!global_flags.transcode_audio && global_flags.stream_audio_codec_name.empty()) {
510 fprintf(stderr, "ERROR: If not transcoding audio, you must specify ahead-of-time what audio codec is in use\n");
511 fprintf(stderr, " (using --http-audio-codec).\n");
514 if (global_flags.x264_speedcontrol) {
515 if (!global_flags.x264_preset.empty() && global_flags.x264_preset != "faster") {
516 fprintf(stderr, "WARNING: --x264-preset is overridden by --x264-speedcontrol (implicitly uses \"faster\" as base preset)\n");
518 global_flags.x264_preset = "faster";
519 } else if (global_flags.x264_preset.empty()) {
520 global_flags.x264_preset = X264_DEFAULT_PRESET;
522 if (!theme_dirs.empty()) {
523 global_flags.theme_dirs = theme_dirs;
526 // In reality, we could probably do with any even value (we subsample
527 // by two in some places), but it's better to be on the safe side
528 // wrt. video codecs and such. (I'd set 16 if I could, but 1080 isn't
530 if (global_flags.width <= 0 || (global_flags.width % 8) != 0 ||
531 global_flags.height <= 0 || (global_flags.height % 8) != 0) {
532 fprintf(stderr, "ERROR: --width and --height must be positive integers divisible by 8\n");
536 for (pair<int, int> mapping : global_flags.default_stream_mapping) {
537 if (mapping.second >= global_flags.num_cards) {
538 fprintf(stderr, "ERROR: Signal %d mapped to card %d, which doesn't exist (try adjusting --num-cards)\n",
539 mapping.first, mapping.second);
544 // Rec. 709 would be the sane thing to do, but it seems many players
545 // just default to BT.601 coefficients no matter what. We _do_ set
546 // the right flags, so that a player that works properly doesn't have
547 // to guess, but it's frequently ignored. See discussions
548 // in e.g. https://trac.ffmpeg.org/ticket/4978; the situation with
549 // browsers is complicated and depends on things like hardware acceleration
550 // (https://bugs.chromium.org/p/chromium/issues/detail?id=333619 for
551 // extensive discussion). VLC generally fixed this as part of 3.0.0
552 // (see e.g. https://github.com/videolan/vlc/commit/bc71288b2e38c07d6921472824b92eef1aa85f7e
553 // and https://github.com/videolan/vlc/commit/c3fc2683a9cde1d42674ebf9935dced05733a215),
554 // but earlier versions were pretty random.
556 // On the other hand, HDMI/SDI output typically requires Rec. 709 for
557 // HD resolutions (with no way of signaling anything else), which is
558 // a conflicting demand. In this case, we typically let the HDMI/SDI
559 // output win if it is active, but the user can override this.
560 if (output_ycbcr_coefficients == "auto") {
561 // Essentially: BT.709 if HDMI/SDI output is on, otherwise BT.601.
562 global_flags.ycbcr_rec709_coefficients = false;
563 global_flags.ycbcr_auto_coefficients = true;
564 } else if (output_ycbcr_coefficients == "rec709") {
565 global_flags.ycbcr_rec709_coefficients = true;
566 global_flags.ycbcr_auto_coefficients = false;
567 } else if (output_ycbcr_coefficients == "rec601") {
568 global_flags.ycbcr_rec709_coefficients = false;
569 global_flags.ycbcr_auto_coefficients = false;
571 fprintf(stderr, "ERROR: --output-ycbcr-coefficients must be “rec601”, “rec709” or “auto”\n");
575 if (global_flags.output_buffer_frames < 0.0f) {
576 // Actually, even zero probably won't make sense; there is some internal
577 // delay to the card.
578 fprintf(stderr, "ERROR: --output-buffer-frames can't be negative.\n");
581 if (global_flags.output_slop_frames < 0.0f) {
582 fprintf(stderr, "ERROR: --output-slop-frames can't be negative.\n");
585 if (global_flags.max_input_queue_frames < 1) {
586 fprintf(stderr, "ERROR: --max-input-queue-frames must be at least 1.\n");
589 if (global_flags.max_input_queue_frames > 10) {
590 fprintf(stderr, "WARNING: --max-input-queue-frames has little effect over 10.\n");
593 if (!isinf(global_flags.x264_crf)) { // CRF mode is selected.
594 if (global_flags.x264_bitrate != -1) {
595 fprintf(stderr, "ERROR: --x264-bitrate and --x264-crf are mutually incompatible.\n");
598 if (global_flags.x264_vbv_max_bitrate != -1 && global_flags.x264_vbv_buffer_size != -1) {
599 fprintf(stderr, "WARNING: VBV settings are ignored with --x264-crf.\n");
601 } else if (global_flags.x264_bitrate == -1) {
602 global_flags.x264_bitrate = DEFAULT_X264_OUTPUT_BIT_RATE;