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,
37 OPTION_NO_TRANSCODE_AUDIO,
42 OPTION_DISABLE_GAIN_STAGING_AUTO,
43 OPTION_ENABLE_GAIN_STAGING_AUTO,
44 OPTION_DISABLE_COMPRESSOR,
45 OPTION_ENABLE_COMPRESSOR,
46 OPTION_DISABLE_LIMITER,
47 OPTION_ENABLE_LIMITER,
48 OPTION_DISABLE_MAKEUP_GAIN_AUTO,
49 OPTION_ENABLE_MAKEUP_GAIN_AUTO,
50 OPTION_DISABLE_ALSA_OUTPUT,
52 OPTION_PRINT_VIDEO_LATENCY,
53 OPTION_MAX_INPUT_QUEUE_FRAMES,
54 OPTION_AUDIO_QUEUE_LENGTH_MS,
55 OPTION_OUTPUT_YCBCR_COEFFICIENTS,
56 OPTION_OUTPUT_BUFFER_FRAMES,
57 OPTION_OUTPUT_SLOP_FRAMES,
58 OPTION_TIMECODE_STREAM,
59 OPTION_TIMECODE_STDOUT,
60 OPTION_QUICK_CUT_KEYS,
63 OPTION_INPUT_YCBCR_INTERPRETATION,
66 void usage(Program program)
68 if (program == PROGRAM_KAERU) {
69 fprintf(stderr, "Usage: kaeru [OPTION]... SOURCE_URL\n");
71 fprintf(stderr, "Usage: nageru [OPTION]...\n");
73 fprintf(stderr, "\n");
74 fprintf(stderr, " --help print usage information\n");
75 fprintf(stderr, " -w, --width output width in pixels (default 1280)\n");
76 fprintf(stderr, " -h, --height output height in pixels (default 720)\n");
77 if (program == PROGRAM_NAGERU) {
78 fprintf(stderr, " -c, --num-cards set number of input cards (default 2)\n");
79 fprintf(stderr, " -o, --output-card=CARD also output signal to the given card (default none)\n");
80 fprintf(stderr, " -t, --theme=FILE choose theme (default theme.lua)\n");
81 fprintf(stderr, " -I, --theme-dir=DIR search for theme in this directory (can be given multiple times)\n");
82 fprintf(stderr, " -r, --recording-dir=DIR where to store disk recording\n");
83 fprintf(stderr, " -v, --va-display=SPEC VA-API device for H.264 encoding\n");
84 fprintf(stderr, " ($DISPLAY spec or /dev/dri/render* path)\n");
85 fprintf(stderr, " -m, --map-signal=SIGNAL,CARD set a default card mapping (can be given multiple times)\n");
86 fprintf(stderr, " -M, --input-mapping=FILE start with the given audio input mapping (implies --multichannel)\n");
87 fprintf(stderr, " --multichannel start in multichannel audio mapping mode\n");
88 fprintf(stderr, " --midi-mapping=FILE start with the given MIDI controller mapping (implies --multichannel)\n");
89 fprintf(stderr, " --fake-cards-audio make fake (disconnected) cards output a simple tone\n");
90 fprintf(stderr, " --http-uncompressed-video send uncompressed NV12 video to HTTP clients\n");
91 fprintf(stderr, " --http-x264-video send x264-compressed video to HTTP clients\n");
92 fprintf(stderr, " --record-x264-video store x264-compressed video to disk (implies --http-x264-video,\n");
93 fprintf(stderr, " removes the need for working VA-API encoding)\n");
95 fprintf(stderr, " --x264-preset x264 quality preset (default " X264_DEFAULT_PRESET ")\n");
96 fprintf(stderr, " --x264-tune x264 tuning (default " X264_DEFAULT_TUNE ", can be blank)\n");
97 fprintf(stderr, " --x264-speedcontrol try to match x264 preset to available CPU speed\n");
98 fprintf(stderr, " --x264-speedcontrol-verbose output speedcontrol debugging statistics\n");
99 fprintf(stderr, " --x264-bitrate x264 bitrate (in kilobit/sec, default %d)\n",
100 DEFAULT_X264_OUTPUT_BIT_RATE);
101 fprintf(stderr, " --x264-crf=VALUE quality-based VBR (-12 to 51), incompatible with --x264-bitrate and VBV\n");
102 fprintf(stderr, " --x264-vbv-bufsize x264 VBV size (in kilobits, 0 = one-frame VBV,\n");
103 fprintf(stderr, " default: same as --x264-bitrate, that is, one-second VBV)\n");
104 fprintf(stderr, " --x264-vbv-max-bitrate x264 local max bitrate (in kilobit/sec per --vbv-bufsize,\n");
105 fprintf(stderr, " 0 = no limit, default: same as --x264-bitrate, i.e., CBR)\n");
106 fprintf(stderr, " --x264-param=NAME[,VALUE] set any x264 parameter, for fine tuning\n");
107 fprintf(stderr, " --http-mux=NAME mux to use for HTTP streams (default " DEFAULT_STREAM_MUX_NAME ")\n");
108 fprintf(stderr, " --http-audio-codec=NAME audio codec to use for HTTP streams\n");
109 fprintf(stderr, " (default is to use the same as for the recording)\n");
110 fprintf(stderr, " --http-audio-bitrate=KBITS audio codec bit rate to use for HTTP streams\n");
111 fprintf(stderr, " (default is %d, ignored unless --http-audio-codec is set)\n",
112 DEFAULT_AUDIO_OUTPUT_BIT_RATE / 1000);
113 fprintf(stderr, " --http-port=PORT which port to use for the built-in HTTP server\n");
114 fprintf(stderr, " (default is %d)\n", DEFAULT_HTTPD_PORT);
115 if (program == PROGRAM_KAERU) {
116 fprintf(stderr, " --no-transcode-audio copy encoded audio raw from the source stream\n");
117 fprintf(stderr, " (requires --http-audio-codec= to be set)\n");
119 if (program == PROGRAM_NAGERU) {
120 fprintf(stderr, " --flat-audio start with most audio processing turned off\n");
121 fprintf(stderr, " (can be overridden by e.g. --enable-limiter)\n");
122 fprintf(stderr, " --gain-staging=DB set initial gain staging to the given value\n");
123 fprintf(stderr, " (--disable-gain-staging-auto)\n");
124 fprintf(stderr, " --disable-locut turn off locut filter (also --enable)\n");
125 fprintf(stderr, " --disable-gain-staging-auto turn off automatic gain staging (also --enable)\n");
126 fprintf(stderr, " --disable-compressor turn off regular compressor (also --enable)\n");
127 fprintf(stderr, " --disable-limiter turn off limiter (also --enable)\n");
128 fprintf(stderr, " --disable-makeup-gain-auto turn off auto-adjustment of final makeup gain (also --enable)\n");
129 fprintf(stderr, " --disable-alsa-output disable audio monitoring via ALSA\n");
130 fprintf(stderr, " --no-flush-pbos do not explicitly signal texture data uploads\n");
131 fprintf(stderr, " (will give display corruption, but makes it\n");
132 fprintf(stderr, " possible to run with apitrace in real time)\n");
133 fprintf(stderr, " --print-video-latency print out measurements of video latency on stdout\n");
134 fprintf(stderr, " --max-input-queue-frames=FRAMES never keep more than FRAMES frames for each card\n");
135 fprintf(stderr, " (default 6, minimum 1)\n");
136 fprintf(stderr, " --audio-queue-length-ms=MS length of audio resampling queue (default 100.0)\n");
137 fprintf(stderr, " --output-ycbcr-coefficients={rec601,rec709,auto}\n");
138 fprintf(stderr, " Y'CbCr coefficient standard of output (default auto)\n");
139 fprintf(stderr, " auto is rec601, unless --output-card is used\n");
140 fprintf(stderr, " and a Rec. 709 mode (typically HD modes) is in use\n");
141 fprintf(stderr, " --output-buffer-frames=NUM number of frames in output buffer for --output-card,\n");
142 fprintf(stderr, " can be fractional (default 6.0); note also\n");
143 fprintf(stderr, " the audio queue can't be much longer than this\n");
144 fprintf(stderr, " --output-slop-frames=NUM if more less than this number of frames behind for\n");
145 fprintf(stderr, " --output-card, try to submit anyway instead of\n");
146 fprintf(stderr, " dropping the frame (default 0.5)\n");
147 fprintf(stderr, " --timecode-stream show timestamp and timecode in stream\n");
148 fprintf(stderr, " --timecode-stdout show timestamp and timecode on standard output\n");
149 fprintf(stderr, " --quick-cut-keys enable direct cutting by Q, W, E, ... keys\n");
150 fprintf(stderr, " --10-bit-input use 10-bit video input (requires compute shaders)\n");
151 fprintf(stderr, " --10-bit-output use 10-bit video output (requires compute shaders,\n");
152 fprintf(stderr, " implies --record-x264-video)\n");
153 fprintf(stderr, " --input-ycbcr-interpretation=CARD,{rec601,rec709,auto}[,{limited,full}]\n");
154 fprintf(stderr, " Y'CbCr coefficient standard of card CARD (default auto)\n");
155 fprintf(stderr, " auto is rec601 for SD, rec709 for HD, always limited\n");
156 fprintf(stderr, " limited means standard 0-240/0-235 input range (for 8-bit)\n");
160 void parse_flags(Program program, int argc, char * const argv[])
162 static const option long_options[] = {
163 { "help", no_argument, 0, OPTION_HELP },
164 { "width", required_argument, 0, 'w' },
165 { "height", required_argument, 0, 'h' },
166 { "num-cards", required_argument, 0, 'c' },
167 { "output-card", required_argument, 0, 'o' },
168 { "theme", required_argument, 0, 't' },
169 { "theme-dir", required_argument, 0, 'I' },
170 { "recording-dir", required_argument, 0, 'r' },
171 { "map-signal", required_argument, 0, 'm' },
172 { "input-mapping", required_argument, 0, 'M' },
173 { "va-display", required_argument, 0, 'v' },
174 { "multichannel", no_argument, 0, OPTION_MULTICHANNEL },
175 { "midi-mapping", required_argument, 0, OPTION_MIDI_MAPPING },
176 { "fake-cards-audio", no_argument, 0, OPTION_FAKE_CARDS_AUDIO },
177 { "http-uncompressed-video", no_argument, 0, OPTION_HTTP_UNCOMPRESSED_VIDEO },
178 { "http-x264-video", no_argument, 0, OPTION_HTTP_X264_VIDEO },
179 { "record-x264-video", no_argument, 0, OPTION_RECORD_X264_VIDEO },
180 { "x264-preset", required_argument, 0, OPTION_X264_PRESET },
181 { "x264-tune", required_argument, 0, OPTION_X264_TUNE },
182 { "x264-speedcontrol", no_argument, 0, OPTION_X264_SPEEDCONTROL },
183 { "x264-speedcontrol-verbose", no_argument, 0, OPTION_X264_SPEEDCONTROL_VERBOSE },
184 { "x264-bitrate", required_argument, 0, OPTION_X264_BITRATE },
185 { "x264-crf", required_argument, 0, OPTION_X264_CRF },
186 { "x264-vbv-bufsize", required_argument, 0, OPTION_X264_VBV_BUFSIZE },
187 { "x264-vbv-max-bitrate", required_argument, 0, OPTION_X264_VBV_MAX_BITRATE },
188 { "x264-param", required_argument, 0, OPTION_X264_PARAM },
189 { "http-mux", required_argument, 0, OPTION_HTTP_MUX },
190 { "http-audio-codec", required_argument, 0, OPTION_HTTP_AUDIO_CODEC },
191 { "http-audio-bitrate", required_argument, 0, OPTION_HTTP_AUDIO_BITRATE },
192 { "http-port", required_argument, 0, OPTION_HTTP_PORT },
193 { "no-transcode-audio", no_argument, 0, OPTION_NO_TRANSCODE_AUDIO },
194 { "flat-audio", no_argument, 0, OPTION_FLAT_AUDIO },
195 { "gain-staging", required_argument, 0, OPTION_GAIN_STAGING },
196 { "disable-locut", no_argument, 0, OPTION_DISABLE_LOCUT },
197 { "enable-locut", no_argument, 0, OPTION_ENABLE_LOCUT },
198 { "disable-gain-staging-auto", no_argument, 0, OPTION_DISABLE_GAIN_STAGING_AUTO },
199 { "enable-gain-staging-auto", no_argument, 0, OPTION_ENABLE_GAIN_STAGING_AUTO },
200 { "disable-compressor", no_argument, 0, OPTION_DISABLE_COMPRESSOR },
201 { "enable-compressor", no_argument, 0, OPTION_ENABLE_COMPRESSOR },
202 { "disable-limiter", no_argument, 0, OPTION_DISABLE_LIMITER },
203 { "enable-limiter", no_argument, 0, OPTION_ENABLE_LIMITER },
204 { "disable-makeup-gain-auto", no_argument, 0, OPTION_DISABLE_MAKEUP_GAIN_AUTO },
205 { "enable-makeup-gain-auto", no_argument, 0, OPTION_ENABLE_MAKEUP_GAIN_AUTO },
206 { "disable-alsa-output", no_argument, 0, OPTION_DISABLE_ALSA_OUTPUT },
207 { "no-flush-pbos", no_argument, 0, OPTION_NO_FLUSH_PBOS },
208 { "print-video-latency", no_argument, 0, OPTION_PRINT_VIDEO_LATENCY },
209 { "max-input-queue-frames", required_argument, 0, OPTION_MAX_INPUT_QUEUE_FRAMES },
210 { "audio-queue-length-ms", required_argument, 0, OPTION_AUDIO_QUEUE_LENGTH_MS },
211 { "output-ycbcr-coefficients", required_argument, 0, OPTION_OUTPUT_YCBCR_COEFFICIENTS },
212 { "output-buffer-frames", required_argument, 0, OPTION_OUTPUT_BUFFER_FRAMES },
213 { "output-slop-frames", required_argument, 0, OPTION_OUTPUT_SLOP_FRAMES },
214 { "timecode-stream", no_argument, 0, OPTION_TIMECODE_STREAM },
215 { "timecode-stdout", no_argument, 0, OPTION_TIMECODE_STDOUT },
216 { "quick-cut-keys", no_argument, 0, OPTION_QUICK_CUT_KEYS },
217 { "10-bit-input", no_argument, 0, OPTION_10_BIT_INPUT },
218 { "10-bit-output", no_argument, 0, OPTION_10_BIT_OUTPUT },
219 { "input-ycbcr-interpretation", required_argument, 0, OPTION_INPUT_YCBCR_INTERPRETATION },
222 vector<string> theme_dirs;
223 string output_ycbcr_coefficients = "auto";
225 int option_index = 0;
226 int c = getopt_long(argc, argv, "c:t:I:r:v:m:M:w:h:", long_options, &option_index);
233 global_flags.width = atoi(optarg);
236 global_flags.height = atoi(optarg);
239 global_flags.num_cards = atoi(optarg);
242 global_flags.output_card = atoi(optarg);
245 global_flags.theme_filename = optarg;
248 theme_dirs.push_back(optarg);
251 global_flags.recording_dir = optarg;
254 char *ptr = strchr(optarg, ',');
255 if (ptr == nullptr) {
256 fprintf(stderr, "ERROR: Invalid argument '%s' to --map-signal (needs a signal and a card number, separated by comma)\n", optarg);
260 const int signal_num = atoi(optarg);
261 const int card_num = atoi(ptr + 1);
262 if (global_flags.default_stream_mapping.count(signal_num)) {
263 fprintf(stderr, "ERROR: Signal %d already mapped to card %d\n",
264 signal_num, global_flags.default_stream_mapping[signal_num]);
267 global_flags.default_stream_mapping[signal_num] = card_num;
271 global_flags.input_mapping_filename = optarg;
273 case OPTION_MULTICHANNEL:
274 global_flags.multichannel_mapping_mode = true;
277 global_flags.va_display = optarg;
279 case OPTION_MIDI_MAPPING:
280 global_flags.midi_mapping_filename = optarg;
281 global_flags.multichannel_mapping_mode = true;
283 case OPTION_FAKE_CARDS_AUDIO:
284 global_flags.fake_cards_audio = true;
286 case OPTION_HTTP_UNCOMPRESSED_VIDEO:
287 global_flags.uncompressed_video_to_http = true;
289 case OPTION_HTTP_MUX:
290 global_flags.stream_mux_name = optarg;
292 case OPTION_HTTP_AUDIO_CODEC:
293 global_flags.stream_audio_codec_name = optarg;
295 case OPTION_HTTP_AUDIO_BITRATE:
296 global_flags.stream_audio_codec_bitrate = atoi(optarg) * 1000;
298 case OPTION_HTTP_PORT:
299 global_flags.http_port = atoi(optarg);
301 case OPTION_NO_TRANSCODE_AUDIO:
302 global_flags.transcode_audio = false;
304 case OPTION_HTTP_X264_VIDEO:
305 global_flags.x264_video_to_http = true;
307 case OPTION_RECORD_X264_VIDEO:
308 global_flags.x264_video_to_disk = true;
309 global_flags.x264_video_to_http = true;
311 case OPTION_X264_PRESET:
312 global_flags.x264_preset = optarg;
314 case OPTION_X264_TUNE:
315 global_flags.x264_tune = optarg;
317 case OPTION_X264_SPEEDCONTROL:
318 global_flags.x264_speedcontrol = true;
320 case OPTION_X264_SPEEDCONTROL_VERBOSE:
321 global_flags.x264_speedcontrol_verbose = true;
323 case OPTION_X264_BITRATE:
324 global_flags.x264_bitrate = atoi(optarg);
326 case OPTION_X264_CRF:
327 global_flags.x264_crf = atof(optarg);
329 case OPTION_X264_VBV_BUFSIZE:
330 global_flags.x264_vbv_buffer_size = atoi(optarg);
332 case OPTION_X264_VBV_MAX_BITRATE:
333 global_flags.x264_vbv_max_bitrate = atoi(optarg);
335 case OPTION_X264_PARAM:
336 global_flags.x264_extra_param.push_back(optarg);
338 case OPTION_FLAT_AUDIO:
339 // If --flat-audio is given, turn off everything that messes with the sound,
340 // except the final makeup gain.
341 global_flags.locut_enabled = false;
342 global_flags.gain_staging_auto = false;
343 global_flags.compressor_enabled = false;
344 global_flags.limiter_enabled = false;
346 case OPTION_GAIN_STAGING:
347 global_flags.initial_gain_staging_db = atof(optarg);
348 global_flags.gain_staging_auto = false;
350 case OPTION_DISABLE_LOCUT:
351 global_flags.locut_enabled = false;
353 case OPTION_ENABLE_LOCUT:
354 global_flags.locut_enabled = true;
356 case OPTION_DISABLE_GAIN_STAGING_AUTO:
357 global_flags.gain_staging_auto = false;
359 case OPTION_ENABLE_GAIN_STAGING_AUTO:
360 global_flags.gain_staging_auto = true;
362 case OPTION_DISABLE_COMPRESSOR:
363 global_flags.compressor_enabled = false;
365 case OPTION_ENABLE_COMPRESSOR:
366 global_flags.compressor_enabled = true;
368 case OPTION_DISABLE_LIMITER:
369 global_flags.limiter_enabled = false;
371 case OPTION_ENABLE_LIMITER:
372 global_flags.limiter_enabled = true;
374 case OPTION_DISABLE_MAKEUP_GAIN_AUTO:
375 global_flags.final_makeup_gain_auto = false;
377 case OPTION_ENABLE_MAKEUP_GAIN_AUTO:
378 global_flags.final_makeup_gain_auto = true;
380 case OPTION_DISABLE_ALSA_OUTPUT:
381 global_flags.enable_alsa_output = false;
383 case OPTION_NO_FLUSH_PBOS:
384 global_flags.flush_pbos = false;
386 case OPTION_PRINT_VIDEO_LATENCY:
387 global_flags.print_video_latency = true;
389 case OPTION_MAX_INPUT_QUEUE_FRAMES:
390 global_flags.max_input_queue_frames = atoi(optarg);
392 case OPTION_AUDIO_QUEUE_LENGTH_MS:
393 global_flags.audio_queue_length_ms = atof(optarg);
395 case OPTION_OUTPUT_YCBCR_COEFFICIENTS:
396 output_ycbcr_coefficients = optarg;
398 case OPTION_OUTPUT_BUFFER_FRAMES:
399 global_flags.output_buffer_frames = atof(optarg);
401 case OPTION_OUTPUT_SLOP_FRAMES:
402 global_flags.output_slop_frames = atof(optarg);
404 case OPTION_TIMECODE_STREAM:
405 global_flags.display_timecode_in_stream = true;
407 case OPTION_TIMECODE_STDOUT:
408 global_flags.display_timecode_on_stdout = true;
410 case OPTION_QUICK_CUT_KEYS:
411 global_flags.enable_quick_cut_keys = true;
413 case OPTION_10_BIT_INPUT:
414 global_flags.ten_bit_input = true;
416 case OPTION_10_BIT_OUTPUT:
417 global_flags.ten_bit_output = true;
418 global_flags.x264_video_to_disk = true;
419 global_flags.x264_video_to_http = true;
420 global_flags.x264_bit_depth = 10;
422 case OPTION_INPUT_YCBCR_INTERPRETATION: {
423 char *ptr = strchr(optarg, ',');
424 if (ptr == nullptr) {
425 fprintf(stderr, "ERROR: Invalid argument '%s' to --input-ycbcr-interpretation (needs a card and an interpretation, separated by comma)\n", optarg);
429 const int card_num = atoi(optarg);
430 if (card_num < 0 || card_num >= MAX_VIDEO_CARDS) {
431 fprintf(stderr, "ERROR: Invalid card number %d\n", card_num);
435 YCbCrInterpretation interpretation;
436 char *interpretation_str = ptr + 1;
437 ptr = strchr(interpretation_str, ',');
438 if (ptr != nullptr) {
440 const char *range = ptr + 1;
441 if (strcmp(range, "full") == 0) {
442 interpretation.full_range = true;
443 } else if (strcmp(range, "limited") == 0) {
444 interpretation.full_range = false;
446 fprintf(stderr, "ERROR: Invalid Y'CbCr range '%s' (must be “full” or “limited”)\n", range);
451 if (strcmp(interpretation_str, "rec601") == 0) {
452 interpretation.ycbcr_coefficients_auto = false;
453 interpretation.ycbcr_coefficients = movit::YCBCR_REC_601;
454 } else if (strcmp(interpretation_str, "rec709") == 0) {
455 interpretation.ycbcr_coefficients_auto = false;
456 interpretation.ycbcr_coefficients = movit::YCBCR_REC_709;
457 } else if (strcmp(interpretation_str, "auto") == 0) {
458 interpretation.ycbcr_coefficients_auto = true;
459 if (interpretation.full_range) {
460 fprintf(stderr, "ERROR: Cannot use “auto” Y'CbCr coefficients with full range\n");
464 fprintf(stderr, "ERROR: Invalid Y'CbCr coefficients '%s' (must be “rec601”, “rec709” or “auto”)\n", interpretation_str);
467 global_flags.ycbcr_interpretation[card_num] = interpretation;
474 fprintf(stderr, "Unknown option '%s'\n", argv[option_index]);
475 fprintf(stderr, "\n");
481 if (global_flags.uncompressed_video_to_http &&
482 global_flags.x264_video_to_http) {
483 fprintf(stderr, "ERROR: --http-uncompressed-video and --http-x264-video are mutually incompatible\n");
486 if (global_flags.num_cards <= 0) {
487 fprintf(stderr, "ERROR: --num-cards must be at least 1\n");
490 if (global_flags.output_card < -1 ||
491 global_flags.output_card >= global_flags.num_cards) {
492 fprintf(stderr, "ERROR: --output-card points to a nonexistant card\n");
495 if (!global_flags.transcode_audio && global_flags.stream_audio_codec_name.empty()) {
496 fprintf(stderr, "ERROR: If not transcoding audio, you must specify ahead-of-time what audio codec is in use\n");
497 fprintf(stderr, " (using --http-audio-codec).\n");
500 if (global_flags.x264_speedcontrol) {
501 if (!global_flags.x264_preset.empty() && global_flags.x264_preset != "faster") {
502 fprintf(stderr, "WARNING: --x264-preset is overridden by --x264-speedcontrol (implicitly uses \"faster\" as base preset)\n");
504 global_flags.x264_preset = "faster";
505 } else if (global_flags.x264_preset.empty()) {
506 global_flags.x264_preset = X264_DEFAULT_PRESET;
508 if (!theme_dirs.empty()) {
509 global_flags.theme_dirs = theme_dirs;
512 // In reality, we could probably do with any even value (we subsample
513 // by two in some places), but it's better to be on the safe side
514 // wrt. video codecs and such. (I'd set 16 if I could, but 1080 isn't
516 if (global_flags.width <= 0 || (global_flags.width % 8) != 0 ||
517 global_flags.height <= 0 || (global_flags.height % 8) != 0) {
518 fprintf(stderr, "ERROR: --width and --height must be positive integers divisible by 8\n");
522 for (pair<int, int> mapping : global_flags.default_stream_mapping) {
523 if (mapping.second >= global_flags.num_cards) {
524 fprintf(stderr, "ERROR: Signal %d mapped to card %d, which doesn't exist (try adjusting --num-cards)\n",
525 mapping.first, mapping.second);
530 // Rec. 709 would be the sane thing to do, but it seems many players
531 // just default to BT.601 coefficients no matter what. We _do_ set
532 // the right flags, so that a player that works properly doesn't have
533 // to guess, but it's frequently ignored. See discussions
534 // in e.g. https://trac.ffmpeg.org/ticket/4978; the situation with
535 // browsers is complicated and depends on things like hardware acceleration
536 // (https://bugs.chromium.org/p/chromium/issues/detail?id=333619 for
537 // extensive discussion). VLC generally fixed this as part of 3.0.0
538 // (see e.g. https://github.com/videolan/vlc/commit/bc71288b2e38c07d6921472824b92eef1aa85f7e
539 // and https://github.com/videolan/vlc/commit/c3fc2683a9cde1d42674ebf9935dced05733a215),
540 // but earlier versions were pretty random.
542 // On the other hand, HDMI/SDI output typically requires Rec. 709 for
543 // HD resolutions (with no way of signaling anything else), which is
544 // a conflicting demand. In this case, we typically let the HDMI/SDI
545 // output win if it is active, but the user can override this.
546 if (output_ycbcr_coefficients == "auto") {
547 // Essentially: BT.709 if HDMI/SDI output is on, otherwise BT.601.
548 global_flags.ycbcr_rec709_coefficients = false;
549 global_flags.ycbcr_auto_coefficients = true;
550 } else if (output_ycbcr_coefficients == "rec709") {
551 global_flags.ycbcr_rec709_coefficients = true;
552 global_flags.ycbcr_auto_coefficients = false;
553 } else if (output_ycbcr_coefficients == "rec601") {
554 global_flags.ycbcr_rec709_coefficients = false;
555 global_flags.ycbcr_auto_coefficients = false;
557 fprintf(stderr, "ERROR: --output-ycbcr-coefficients must be “rec601”, “rec709” or “auto”\n");
561 if (global_flags.output_buffer_frames < 0.0f) {
562 // Actually, even zero probably won't make sense; there is some internal
563 // delay to the card.
564 fprintf(stderr, "ERROR: --output-buffer-frames can't be negative.\n");
567 if (global_flags.output_slop_frames < 0.0f) {
568 fprintf(stderr, "ERROR: --output-slop-frames can't be negative.\n");
571 if (global_flags.max_input_queue_frames < 1) {
572 fprintf(stderr, "ERROR: --max-input-queue-frames must be at least 1.\n");
575 if (global_flags.max_input_queue_frames > 10) {
576 fprintf(stderr, "WARNING: --max-input-queue-frames has little effect over 10.\n");
579 if (!isinf(global_flags.x264_crf)) { // CRF mode is selected.
580 if (global_flags.x264_bitrate != -1) {
581 fprintf(stderr, "ERROR: --x264-bitrate and --x264-crf are mutually incompatible.\n");
584 if (global_flags.x264_vbv_max_bitrate != -1 && global_flags.x264_vbv_buffer_size != -1) {
585 fprintf(stderr, "WARNING: VBV settings are ignored with --x264-crf.\n");
587 } else if (global_flags.x264_bitrate == -1) {
588 global_flags.x264_bitrate = DEFAULT_X264_OUTPUT_BIT_RATE;