14 // Long options that have no corresponding short option.
19 OPTION_FAKE_CARDS_AUDIO,
20 OPTION_HTTP_UNCOMPRESSED_VIDEO,
21 OPTION_HTTP_X264_VIDEO,
22 OPTION_RECORD_X264_VIDEO,
25 OPTION_X264_SPEEDCONTROL,
26 OPTION_X264_SPEEDCONTROL_VERBOSE,
29 OPTION_X264_VBV_BUFSIZE,
30 OPTION_X264_VBV_MAX_BITRATE,
33 OPTION_HTTP_COARSE_TIMEBASE,
34 OPTION_HTTP_AUDIO_CODEC,
35 OPTION_HTTP_AUDIO_BITRATE,
36 OPTION_NO_TRANSCODE_AUDIO,
41 OPTION_DISABLE_GAIN_STAGING_AUTO,
42 OPTION_ENABLE_GAIN_STAGING_AUTO,
43 OPTION_DISABLE_COMPRESSOR,
44 OPTION_ENABLE_COMPRESSOR,
45 OPTION_DISABLE_LIMITER,
46 OPTION_ENABLE_LIMITER,
47 OPTION_DISABLE_MAKEUP_GAIN_AUTO,
48 OPTION_ENABLE_MAKEUP_GAIN_AUTO,
49 OPTION_DISABLE_ALSA_OUTPUT,
51 OPTION_PRINT_VIDEO_LATENCY,
52 OPTION_MAX_INPUT_QUEUE_FRAMES,
53 OPTION_AUDIO_QUEUE_LENGTH_MS,
54 OPTION_OUTPUT_YCBCR_COEFFICIENTS,
55 OPTION_OUTPUT_BUFFER_FRAMES,
56 OPTION_OUTPUT_SLOP_FRAMES,
57 OPTION_TIMECODE_STREAM,
58 OPTION_TIMECODE_STDOUT,
61 OPTION_INPUT_YCBCR_INTERPRETATION,
64 void usage(Program program)
66 if (program == PROGRAM_KAERU) {
67 fprintf(stderr, "Usage: kaeru [OPTION]... SOURCE_URL\n");
69 fprintf(stderr, "Usage: nageru [OPTION]...\n");
71 fprintf(stderr, "\n");
72 fprintf(stderr, " --help print usage information\n");
73 fprintf(stderr, " -w, --width output width in pixels (default 1280)\n");
74 fprintf(stderr, " -h, --height output height in pixels (default 720)\n");
75 if (program == PROGRAM_NAGERU) {
76 fprintf(stderr, " -c, --num-cards set number of input cards (default 2)\n");
77 fprintf(stderr, " -o, --output-card=CARD also output signal to the given card (default none)\n");
78 fprintf(stderr, " -t, --theme=FILE choose theme (default theme.lua)\n");
79 fprintf(stderr, " -I, --theme-dir=DIR search for theme in this directory (can be given multiple times)\n");
80 fprintf(stderr, " -r, --recording-dir=DIR where to store disk recording\n");
81 fprintf(stderr, " -v, --va-display=SPEC VA-API device for H.264 encoding\n");
82 fprintf(stderr, " ($DISPLAY spec or /dev/dri/render* path)\n");
83 fprintf(stderr, " -m, --map-signal=SIGNAL,CARD set a default card mapping (can be given multiple times)\n");
84 fprintf(stderr, " -M, --input-mapping=FILE start with the given audio input mapping (implies --multichannel)\n");
85 fprintf(stderr, " --multichannel start in multichannel audio mapping mode\n");
86 fprintf(stderr, " --midi-mapping=FILE start with the given MIDI controller mapping (implies --multichannel)\n");
87 fprintf(stderr, " --fake-cards-audio make fake (disconnected) cards output a simple tone\n");
88 fprintf(stderr, " --http-uncompressed-video send uncompressed NV12 video to HTTP clients\n");
89 fprintf(stderr, " --http-x264-video send x264-compressed video to HTTP clients\n");
90 fprintf(stderr, " --record-x264-video store x264-compressed video to disk (implies --http-x264-video,\n");
91 fprintf(stderr, " removes the need for working VA-API encoding)\n");
93 fprintf(stderr, " --x264-preset x264 quality preset (default " X264_DEFAULT_PRESET ")\n");
94 fprintf(stderr, " --x264-tune x264 tuning (default " X264_DEFAULT_TUNE ", can be blank)\n");
95 fprintf(stderr, " --x264-speedcontrol try to match x264 preset to available CPU speed\n");
96 fprintf(stderr, " --x264-speedcontrol-verbose output speedcontrol debugging statistics\n");
97 fprintf(stderr, " --x264-bitrate x264 bitrate (in kilobit/sec, default %d)\n",
98 DEFAULT_X264_OUTPUT_BIT_RATE);
99 fprintf(stderr, " --x264-crf=VALUE quality-based VBR (-12 to 51), incompatible with --x264-bitrate and VBV\n");
100 fprintf(stderr, " --x264-vbv-bufsize x264 VBV size (in kilobits, 0 = one-frame VBV,\n");
101 fprintf(stderr, " default: same as --x264-bitrate, that is, one-second VBV)\n");
102 fprintf(stderr, " --x264-vbv-max-bitrate x264 local max bitrate (in kilobit/sec per --vbv-bufsize,\n");
103 fprintf(stderr, " 0 = no limit, default: same as --x264-bitrate, i.e., CBR)\n");
104 fprintf(stderr, " --x264-param=NAME[,VALUE] set any x264 parameter, for fine tuning\n");
105 fprintf(stderr, " --http-mux=NAME mux to use for HTTP streams (default " DEFAULT_STREAM_MUX_NAME ")\n");
106 fprintf(stderr, " --http-audio-codec=NAME audio codec to use for HTTP streams\n");
107 fprintf(stderr, " (default is to use the same as for the recording)\n");
108 fprintf(stderr, " --http-audio-bitrate=KBITS audio codec bit rate to use for HTTP streams\n");
109 fprintf(stderr, " (default is %d, ignored unless --http-audio-codec is set)\n",
110 DEFAULT_AUDIO_OUTPUT_BIT_RATE / 1000);
111 if (program == PROGRAM_KAERU) {
112 fprintf(stderr, " --no-transcode-audio copy encoded audio raw from the source stream\n");
113 fprintf(stderr, " (requires --http-audio-codec= to be set)\n");
115 fprintf(stderr, " --http-coarse-timebase use less timebase for HTTP (recommended for muxers\n");
116 fprintf(stderr, " that handle large pts poorly, like e.g. MP4)\n");
117 if (program == PROGRAM_NAGERU) {
118 fprintf(stderr, " --flat-audio start with most audio processing turned off\n");
119 fprintf(stderr, " (can be overridden by e.g. --enable-limiter)\n");
120 fprintf(stderr, " --gain-staging=DB set initial gain staging to the given value\n");
121 fprintf(stderr, " (--disable-gain-staging-auto)\n");
122 fprintf(stderr, " --disable-locut turn off locut filter (also --enable)\n");
123 fprintf(stderr, " --disable-gain-staging-auto turn off automatic gain staging (also --enable)\n");
124 fprintf(stderr, " --disable-compressor turn off regular compressor (also --enable)\n");
125 fprintf(stderr, " --disable-limiter turn off limiter (also --enable)\n");
126 fprintf(stderr, " --disable-makeup-gain-auto turn off auto-adjustment of final makeup gain (also --enable)\n");
127 fprintf(stderr, " --disable-alsa-output disable audio monitoring via ALSA\n");
128 fprintf(stderr, " --no-flush-pbos do not explicitly signal texture data uploads\n");
129 fprintf(stderr, " (will give display corruption, but makes it\n");
130 fprintf(stderr, " possible to run with apitrace in real time)\n");
131 fprintf(stderr, " --print-video-latency print out measurements of video latency on stdout\n");
132 fprintf(stderr, " --max-input-queue-frames=FRAMES never keep more than FRAMES frames for each card\n");
133 fprintf(stderr, " (default 6, minimum 1)\n");
134 fprintf(stderr, " --audio-queue-length-ms=MS length of audio resampling queue (default 100.0)\n");
135 fprintf(stderr, " --output-ycbcr-coefficients={rec601,rec709,auto}\n");
136 fprintf(stderr, " Y'CbCr coefficient standard of output (default auto)\n");
137 fprintf(stderr, " auto is rec601, unless --output-card is used\n");
138 fprintf(stderr, " and a Rec. 709 mode (typically HD modes) is in use\n");
139 fprintf(stderr, " --output-buffer-frames=NUM number of frames in output buffer for --output-card,\n");
140 fprintf(stderr, " can be fractional (default 6.0); note also\n");
141 fprintf(stderr, " the audio queue can't be much longer than this\n");
142 fprintf(stderr, " --output-slop-frames=NUM if more less than this number of frames behind for\n");
143 fprintf(stderr, " --output-card, try to submit anyway instead of\n");
144 fprintf(stderr, " dropping the frame (default 0.5)\n");
145 fprintf(stderr, " --timecode-stream show timestamp and timecode in stream\n");
146 fprintf(stderr, " --timecode-stdout show timestamp and timecode on standard output\n");
147 fprintf(stderr, " --10-bit-input use 10-bit video input (requires compute shaders)\n");
148 fprintf(stderr, " --10-bit-output use 10-bit video output (requires compute shaders,\n");
149 fprintf(stderr, " implies --record-x264-video)\n");
150 fprintf(stderr, " --input-ycbcr-interpretation=CARD,{rec601,rec709,auto}[,{limited,full}]\n");
151 fprintf(stderr, " Y'CbCr coefficient standard of card CARD (default auto)\n");
152 fprintf(stderr, " auto is rec601 for SD, rec709 for HD, always limited\n");
153 fprintf(stderr, " limited means standard 0-240/0-235 input range (for 8-bit)\n");
157 void parse_flags(Program program, int argc, char * const argv[])
159 static const option long_options[] = {
160 { "help", no_argument, 0, OPTION_HELP },
161 { "width", required_argument, 0, 'w' },
162 { "height", required_argument, 0, 'h' },
163 { "num-cards", required_argument, 0, 'c' },
164 { "output-card", required_argument, 0, 'o' },
165 { "theme", required_argument, 0, 't' },
166 { "theme-dir", required_argument, 0, 'I' },
167 { "recording-dir", required_argument, 0, 'r' },
168 { "map-signal", required_argument, 0, 'm' },
169 { "input-mapping", required_argument, 0, 'M' },
170 { "va-display", required_argument, 0, 'v' },
171 { "multichannel", no_argument, 0, OPTION_MULTICHANNEL },
172 { "midi-mapping", required_argument, 0, OPTION_MIDI_MAPPING },
173 { "fake-cards-audio", no_argument, 0, OPTION_FAKE_CARDS_AUDIO },
174 { "http-uncompressed-video", no_argument, 0, OPTION_HTTP_UNCOMPRESSED_VIDEO },
175 { "http-x264-video", no_argument, 0, OPTION_HTTP_X264_VIDEO },
176 { "record-x264-video", no_argument, 0, OPTION_RECORD_X264_VIDEO },
177 { "x264-preset", required_argument, 0, OPTION_X264_PRESET },
178 { "x264-tune", required_argument, 0, OPTION_X264_TUNE },
179 { "x264-speedcontrol", no_argument, 0, OPTION_X264_SPEEDCONTROL },
180 { "x264-speedcontrol-verbose", no_argument, 0, OPTION_X264_SPEEDCONTROL_VERBOSE },
181 { "x264-bitrate", required_argument, 0, OPTION_X264_BITRATE },
182 { "x264-crf", required_argument, 0, OPTION_X264_CRF },
183 { "x264-vbv-bufsize", required_argument, 0, OPTION_X264_VBV_BUFSIZE },
184 { "x264-vbv-max-bitrate", required_argument, 0, OPTION_X264_VBV_MAX_BITRATE },
185 { "x264-param", required_argument, 0, OPTION_X264_PARAM },
186 { "http-mux", required_argument, 0, OPTION_HTTP_MUX },
187 { "http-coarse-timebase", no_argument, 0, OPTION_HTTP_COARSE_TIMEBASE },
188 { "http-audio-codec", required_argument, 0, OPTION_HTTP_AUDIO_CODEC },
189 { "http-audio-bitrate", required_argument, 0, OPTION_HTTP_AUDIO_BITRATE },
190 { "no-transcode-audio", no_argument, 0, OPTION_NO_TRANSCODE_AUDIO },
191 { "flat-audio", no_argument, 0, OPTION_FLAT_AUDIO },
192 { "gain-staging", required_argument, 0, OPTION_GAIN_STAGING },
193 { "disable-locut", no_argument, 0, OPTION_DISABLE_LOCUT },
194 { "enable-locut", no_argument, 0, OPTION_ENABLE_LOCUT },
195 { "disable-gain-staging-auto", no_argument, 0, OPTION_DISABLE_GAIN_STAGING_AUTO },
196 { "enable-gain-staging-auto", no_argument, 0, OPTION_ENABLE_GAIN_STAGING_AUTO },
197 { "disable-compressor", no_argument, 0, OPTION_DISABLE_COMPRESSOR },
198 { "enable-compressor", no_argument, 0, OPTION_ENABLE_COMPRESSOR },
199 { "disable-limiter", no_argument, 0, OPTION_DISABLE_LIMITER },
200 { "enable-limiter", no_argument, 0, OPTION_ENABLE_LIMITER },
201 { "disable-makeup-gain-auto", no_argument, 0, OPTION_DISABLE_MAKEUP_GAIN_AUTO },
202 { "enable-makeup-gain-auto", no_argument, 0, OPTION_ENABLE_MAKEUP_GAIN_AUTO },
203 { "disable-alsa-output", no_argument, 0, OPTION_DISABLE_ALSA_OUTPUT },
204 { "no-flush-pbos", no_argument, 0, OPTION_NO_FLUSH_PBOS },
205 { "print-video-latency", no_argument, 0, OPTION_PRINT_VIDEO_LATENCY },
206 { "max-input-queue-frames", required_argument, 0, OPTION_MAX_INPUT_QUEUE_FRAMES },
207 { "audio-queue-length-ms", required_argument, 0, OPTION_AUDIO_QUEUE_LENGTH_MS },
208 { "output-ycbcr-coefficients", required_argument, 0, OPTION_OUTPUT_YCBCR_COEFFICIENTS },
209 { "output-buffer-frames", required_argument, 0, OPTION_OUTPUT_BUFFER_FRAMES },
210 { "output-slop-frames", required_argument, 0, OPTION_OUTPUT_SLOP_FRAMES },
211 { "timecode-stream", no_argument, 0, OPTION_TIMECODE_STREAM },
212 { "timecode-stdout", no_argument, 0, OPTION_TIMECODE_STDOUT },
213 { "10-bit-input", no_argument, 0, OPTION_10_BIT_INPUT },
214 { "10-bit-output", no_argument, 0, OPTION_10_BIT_OUTPUT },
215 { "input-ycbcr-interpretation", required_argument, 0, OPTION_INPUT_YCBCR_INTERPRETATION },
218 vector<string> theme_dirs;
219 string output_ycbcr_coefficients = "auto";
221 int option_index = 0;
222 int c = getopt_long(argc, argv, "c:t:I:r:v:m:M:w:h:", long_options, &option_index);
229 global_flags.width = atoi(optarg);
232 global_flags.height = atoi(optarg);
235 global_flags.num_cards = atoi(optarg);
238 global_flags.output_card = atoi(optarg);
241 global_flags.theme_filename = optarg;
244 theme_dirs.push_back(optarg);
247 global_flags.recording_dir = optarg;
250 char *ptr = strchr(optarg, ',');
251 if (ptr == nullptr) {
252 fprintf(stderr, "ERROR: Invalid argument '%s' to --map-signal (needs a signal and a card number, separated by comma)\n", optarg);
256 const int signal_num = atoi(optarg);
257 const int card_num = atoi(ptr + 1);
258 if (global_flags.default_stream_mapping.count(signal_num)) {
259 fprintf(stderr, "ERROR: Signal %d already mapped to card %d\n",
260 signal_num, global_flags.default_stream_mapping[signal_num]);
263 global_flags.default_stream_mapping[signal_num] = card_num;
267 global_flags.input_mapping_filename = optarg;
269 case OPTION_MULTICHANNEL:
270 global_flags.multichannel_mapping_mode = true;
273 global_flags.va_display = optarg;
275 case OPTION_MIDI_MAPPING:
276 global_flags.midi_mapping_filename = optarg;
277 global_flags.multichannel_mapping_mode = true;
279 case OPTION_FAKE_CARDS_AUDIO:
280 global_flags.fake_cards_audio = true;
282 case OPTION_HTTP_UNCOMPRESSED_VIDEO:
283 global_flags.uncompressed_video_to_http = true;
285 case OPTION_HTTP_MUX:
286 global_flags.stream_mux_name = optarg;
288 case OPTION_HTTP_COARSE_TIMEBASE:
289 global_flags.stream_coarse_timebase = true;
291 case OPTION_HTTP_AUDIO_CODEC:
292 global_flags.stream_audio_codec_name = optarg;
294 case OPTION_HTTP_AUDIO_BITRATE:
295 global_flags.stream_audio_codec_bitrate = atoi(optarg) * 1000;
297 case OPTION_NO_TRANSCODE_AUDIO:
298 global_flags.transcode_audio = false;
300 case OPTION_HTTP_X264_VIDEO:
301 global_flags.x264_video_to_http = true;
303 case OPTION_RECORD_X264_VIDEO:
304 global_flags.x264_video_to_disk = true;
305 global_flags.x264_video_to_http = true;
307 case OPTION_X264_PRESET:
308 global_flags.x264_preset = optarg;
310 case OPTION_X264_TUNE:
311 global_flags.x264_tune = optarg;
313 case OPTION_X264_SPEEDCONTROL:
314 global_flags.x264_speedcontrol = true;
316 case OPTION_X264_SPEEDCONTROL_VERBOSE:
317 global_flags.x264_speedcontrol_verbose = true;
319 case OPTION_X264_BITRATE:
320 global_flags.x264_bitrate = atoi(optarg);
322 case OPTION_X264_CRF:
323 global_flags.x264_crf = atof(optarg);
325 case OPTION_X264_VBV_BUFSIZE:
326 global_flags.x264_vbv_buffer_size = atoi(optarg);
328 case OPTION_X264_VBV_MAX_BITRATE:
329 global_flags.x264_vbv_max_bitrate = atoi(optarg);
331 case OPTION_X264_PARAM:
332 global_flags.x264_extra_param.push_back(optarg);
334 case OPTION_FLAT_AUDIO:
335 // If --flat-audio is given, turn off everything that messes with the sound,
336 // except the final makeup gain.
337 global_flags.locut_enabled = false;
338 global_flags.gain_staging_auto = false;
339 global_flags.compressor_enabled = false;
340 global_flags.limiter_enabled = false;
342 case OPTION_GAIN_STAGING:
343 global_flags.initial_gain_staging_db = atof(optarg);
344 global_flags.gain_staging_auto = false;
346 case OPTION_DISABLE_LOCUT:
347 global_flags.locut_enabled = false;
349 case OPTION_ENABLE_LOCUT:
350 global_flags.locut_enabled = true;
352 case OPTION_DISABLE_GAIN_STAGING_AUTO:
353 global_flags.gain_staging_auto = false;
355 case OPTION_ENABLE_GAIN_STAGING_AUTO:
356 global_flags.gain_staging_auto = true;
358 case OPTION_DISABLE_COMPRESSOR:
359 global_flags.compressor_enabled = false;
361 case OPTION_ENABLE_COMPRESSOR:
362 global_flags.compressor_enabled = true;
364 case OPTION_DISABLE_LIMITER:
365 global_flags.limiter_enabled = false;
367 case OPTION_ENABLE_LIMITER:
368 global_flags.limiter_enabled = true;
370 case OPTION_DISABLE_MAKEUP_GAIN_AUTO:
371 global_flags.final_makeup_gain_auto = false;
373 case OPTION_ENABLE_MAKEUP_GAIN_AUTO:
374 global_flags.final_makeup_gain_auto = true;
376 case OPTION_DISABLE_ALSA_OUTPUT:
377 global_flags.enable_alsa_output = false;
379 case OPTION_NO_FLUSH_PBOS:
380 global_flags.flush_pbos = false;
382 case OPTION_PRINT_VIDEO_LATENCY:
383 global_flags.print_video_latency = true;
385 case OPTION_MAX_INPUT_QUEUE_FRAMES:
386 global_flags.max_input_queue_frames = atoi(optarg);
388 case OPTION_AUDIO_QUEUE_LENGTH_MS:
389 global_flags.audio_queue_length_ms = atof(optarg);
391 case OPTION_OUTPUT_YCBCR_COEFFICIENTS:
392 output_ycbcr_coefficients = optarg;
394 case OPTION_OUTPUT_BUFFER_FRAMES:
395 global_flags.output_buffer_frames = atof(optarg);
397 case OPTION_OUTPUT_SLOP_FRAMES:
398 global_flags.output_slop_frames = atof(optarg);
400 case OPTION_TIMECODE_STREAM:
401 global_flags.display_timecode_in_stream = true;
403 case OPTION_TIMECODE_STDOUT:
404 global_flags.display_timecode_on_stdout = true;
406 case OPTION_10_BIT_INPUT:
407 global_flags.ten_bit_input = true;
409 case OPTION_10_BIT_OUTPUT:
410 global_flags.ten_bit_output = true;
411 global_flags.x264_video_to_disk = true;
412 global_flags.x264_video_to_http = true;
413 global_flags.x264_bit_depth = 10;
415 case OPTION_INPUT_YCBCR_INTERPRETATION: {
416 char *ptr = strchr(optarg, ',');
417 if (ptr == nullptr) {
418 fprintf(stderr, "ERROR: Invalid argument '%s' to --input-ycbcr-interpretation (needs a card and an interpretation, separated by comma)\n", optarg);
422 const int card_num = atoi(optarg);
423 if (card_num < 0 || card_num >= MAX_VIDEO_CARDS) {
424 fprintf(stderr, "ERROR: Invalid card number %d\n", card_num);
428 YCbCrInterpretation interpretation;
429 char *interpretation_str = ptr + 1;
430 ptr = strchr(interpretation_str, ',');
431 if (ptr != nullptr) {
433 const char *range = ptr + 1;
434 if (strcmp(range, "full") == 0) {
435 interpretation.full_range = true;
436 } else if (strcmp(range, "limited") == 0) {
437 interpretation.full_range = false;
439 fprintf(stderr, "ERROR: Invalid Y'CbCr range '%s' (must be “full” or “limited”)\n", range);
444 if (strcmp(interpretation_str, "rec601") == 0) {
445 interpretation.ycbcr_coefficients_auto = false;
446 interpretation.ycbcr_coefficients = movit::YCBCR_REC_601;
447 } else if (strcmp(interpretation_str, "rec709") == 0) {
448 interpretation.ycbcr_coefficients_auto = false;
449 interpretation.ycbcr_coefficients = movit::YCBCR_REC_709;
450 } else if (strcmp(interpretation_str, "auto") == 0) {
451 interpretation.ycbcr_coefficients_auto = true;
452 if (interpretation.full_range) {
453 fprintf(stderr, "ERROR: Cannot use “auto” Y'CbCr coefficients with full range\n");
457 fprintf(stderr, "ERROR: Invalid Y'CbCr coefficients '%s' (must be “rec601”, “rec709” or “auto”)\n", interpretation_str);
460 global_flags.ycbcr_interpretation[card_num] = interpretation;
467 fprintf(stderr, "Unknown option '%s'\n", argv[option_index]);
468 fprintf(stderr, "\n");
474 if (global_flags.uncompressed_video_to_http &&
475 global_flags.x264_video_to_http) {
476 fprintf(stderr, "ERROR: --http-uncompressed-video and --http-x264-video are mutually incompatible\n");
479 if (global_flags.num_cards <= 0) {
480 fprintf(stderr, "ERROR: --num-cards must be at least 1\n");
483 if (global_flags.output_card < -1 ||
484 global_flags.output_card >= global_flags.num_cards) {
485 fprintf(stderr, "ERROR: --output-card points to a nonexistant card\n");
488 if (!global_flags.transcode_audio && global_flags.stream_audio_codec_name.empty()) {
489 fprintf(stderr, "ERROR: If not transcoding audio, you must specify ahead-of-time what audio codec is in use\n");
490 fprintf(stderr, " (using --http-audio-codec).\n");
493 if (global_flags.x264_speedcontrol) {
494 if (!global_flags.x264_preset.empty() && global_flags.x264_preset != "faster") {
495 fprintf(stderr, "WARNING: --x264-preset is overridden by --x264-speedcontrol (implicitly uses \"faster\" as base preset)\n");
497 global_flags.x264_preset = "faster";
498 } else if (global_flags.x264_preset.empty()) {
499 global_flags.x264_preset = X264_DEFAULT_PRESET;
501 if (!theme_dirs.empty()) {
502 global_flags.theme_dirs = theme_dirs;
505 // In reality, we could probably do with any even value (we subsample
506 // by two in some places), but it's better to be on the safe side
507 // wrt. video codecs and such. (I'd set 16 if I could, but 1080 isn't
509 if (global_flags.width <= 0 || (global_flags.width % 8) != 0 ||
510 global_flags.height <= 0 || (global_flags.height % 8) != 0) {
511 fprintf(stderr, "ERROR: --width and --height must be positive integers divisible by 8\n");
515 for (pair<int, int> mapping : global_flags.default_stream_mapping) {
516 if (mapping.second >= global_flags.num_cards) {
517 fprintf(stderr, "ERROR: Signal %d mapped to card %d, which doesn't exist (try adjusting --num-cards)\n",
518 mapping.first, mapping.second);
523 // Rec. 709 would be the sane thing to do, but it seems many players
524 // just default to BT.601 coefficients no matter what. We _do_ set
525 // the right flags, so that a player that works properly doesn't have
526 // to guess, but it's frequently ignored. See discussions
527 // in e.g. https://trac.ffmpeg.org/ticket/4978; the situation with
528 // browsers is complicated and depends on things like hardware acceleration
529 // (https://bugs.chromium.org/p/chromium/issues/detail?id=333619 for
530 // extensive discussion). VLC generally fixed this as part of 3.0.0
531 // (see e.g. https://github.com/videolan/vlc/commit/bc71288b2e38c07d6921472824b92eef1aa85f7e
532 // and https://github.com/videolan/vlc/commit/c3fc2683a9cde1d42674ebf9935dced05733a215),
533 // but earlier versions were pretty random.
535 // On the other hand, HDMI/SDI output typically requires Rec. 709 for
536 // HD resolutions (with no way of signaling anything else), which is
537 // a conflicting demand. In this case, we typically let the HDMI/SDI
538 // output win if it is active, but the user can override this.
539 if (output_ycbcr_coefficients == "auto") {
540 // Essentially: BT.709 if HDMI/SDI output is on, otherwise BT.601.
541 global_flags.ycbcr_rec709_coefficients = false;
542 global_flags.ycbcr_auto_coefficients = true;
543 } else if (output_ycbcr_coefficients == "rec709") {
544 global_flags.ycbcr_rec709_coefficients = true;
545 global_flags.ycbcr_auto_coefficients = false;
546 } else if (output_ycbcr_coefficients == "rec601") {
547 global_flags.ycbcr_rec709_coefficients = false;
548 global_flags.ycbcr_auto_coefficients = false;
550 fprintf(stderr, "ERROR: --output-ycbcr-coefficients must be “rec601”, “rec709” or “auto”\n");
554 if (global_flags.output_buffer_frames < 0.0f) {
555 // Actually, even zero probably won't make sense; there is some internal
556 // delay to the card.
557 fprintf(stderr, "ERROR: --output-buffer-frames can't be negative.\n");
560 if (global_flags.output_slop_frames < 0.0f) {
561 fprintf(stderr, "ERROR: --output-slop-frames can't be negative.\n");
564 if (global_flags.max_input_queue_frames < 1) {
565 fprintf(stderr, "ERROR: --max-input-queue-frames must be at least 1.\n");
568 if (global_flags.max_input_queue_frames > 10) {
569 fprintf(stderr, "WARNING: --max-input-queue-frames has little effect over 10.\n");
572 if (!isinf(global_flags.x264_crf)) { // CRF mode is selected.
573 if (global_flags.x264_bitrate != -1) {
574 fprintf(stderr, "ERROR: --x264-bitrate and --x264-crf are mutually incompatible.\n");
577 if (global_flags.x264_vbv_max_bitrate != -1 && global_flags.x264_vbv_buffer_size != -1) {
578 fprintf(stderr, "WARNING: VBV settings are ignored with --x264-crf.\n");
580 } else if (global_flags.x264_bitrate == -1) {
581 global_flags.x264_bitrate = DEFAULT_X264_OUTPUT_BIT_RATE;