#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
+
+#include <utility>
+
+using namespace std;
Flags global_flags;
+// Long options that have no corresponding short option.
+enum LongOption {
+ OPTION_HELP = 1000,
+ OPTION_MULTICHANNEL,
+ OPTION_MIDI_MAPPING,
+ OPTION_FAKE_CARDS_AUDIO,
+ OPTION_HTTP_UNCOMPRESSED_VIDEO,
+ OPTION_HTTP_X264_VIDEO,
+ OPTION_RECORD_X264_VIDEO,
+ OPTION_X264_PRESET,
+ OPTION_X264_TUNE,
+ OPTION_X264_SPEEDCONTROL,
+ OPTION_X264_SPEEDCONTROL_VERBOSE,
+ OPTION_X264_BITRATE,
+ OPTION_X264_CRF,
+ OPTION_X264_VBV_BUFSIZE,
+ OPTION_X264_VBV_MAX_BITRATE,
+ OPTION_X264_PARAM,
+ OPTION_HTTP_MUX,
+ OPTION_HTTP_COARSE_TIMEBASE,
+ OPTION_HTTP_AUDIO_CODEC,
+ OPTION_HTTP_AUDIO_BITRATE,
+ OPTION_FLAT_AUDIO,
+ OPTION_GAIN_STAGING,
+ OPTION_DISABLE_LOCUT,
+ OPTION_ENABLE_LOCUT,
+ OPTION_DISABLE_GAIN_STAGING_AUTO,
+ OPTION_ENABLE_GAIN_STAGING_AUTO,
+ OPTION_DISABLE_COMPRESSOR,
+ OPTION_ENABLE_COMPRESSOR,
+ OPTION_DISABLE_LIMITER,
+ OPTION_ENABLE_LIMITER,
+ OPTION_DISABLE_MAKEUP_GAIN_AUTO,
+ OPTION_ENABLE_MAKEUP_GAIN_AUTO,
+ OPTION_DISABLE_ALSA_OUTPUT,
+ OPTION_NO_FLUSH_PBOS,
+ OPTION_PRINT_VIDEO_LATENCY,
+ OPTION_MAX_INPUT_QUEUE_FRAMES,
+ OPTION_AUDIO_QUEUE_LENGTH_MS,
+ OPTION_OUTPUT_YCBCR_COEFFICIENTS,
+ OPTION_OUTPUT_BUFFER_FRAMES,
+ OPTION_OUTPUT_SLOP_FRAMES,
+ OPTION_TIMECODE_STREAM,
+ OPTION_TIMECODE_STDOUT,
+ OPTION_10_BIT_INPUT,
+ OPTION_10_BIT_OUTPUT,
+};
+
void usage()
{
fprintf(stderr, "Usage: nageru [OPTION]...\n");
fprintf(stderr, "\n");
- fprintf(stderr, " -h, --help print usage information\n");
+ fprintf(stderr, " --help print usage information\n");
+ fprintf(stderr, " -w, --width output width in pixels (default 1280)\n");
+ fprintf(stderr, " -h, --height output height in pixels (default 720)\n");
fprintf(stderr, " -c, --num-cards set number of input cards (default 2)\n");
+ fprintf(stderr, " -o, --output-card=CARD also output signal to the given card (default none)\n");
fprintf(stderr, " -t, --theme=FILE choose theme (default theme.lua)\n");
+ fprintf(stderr, " -I, --theme-dir=DIR search for theme in this directory (can be given multiple times)\n");
fprintf(stderr, " -v, --va-display=SPEC VA-API device for H.264 encoding\n");
fprintf(stderr, " ($DISPLAY spec or /dev/dri/render* path)\n");
+ fprintf(stderr, " -m, --map-signal=SIGNAL,CARD set a default card mapping (can be given multiple times)\n");
+ fprintf(stderr, " -M, --input-mapping=FILE start with the given audio input mapping (implies --multichannel)\n");
+ fprintf(stderr, " --multichannel start in multichannel audio mapping mode\n");
+ fprintf(stderr, " --midi-mapping=FILE start with the given MIDI controller mapping (implies --multichannel)\n");
+ fprintf(stderr, " --fake-cards-audio make fake (disconnected) cards output a simple tone\n");
fprintf(stderr, " --http-uncompressed-video send uncompressed NV12 video to HTTP clients\n");
fprintf(stderr, " --http-x264-video send x264-compressed video to HTTP clients\n");
+ fprintf(stderr, " --record-x264-video store x264-compressed video to disk (implies --http-x264-video,\n");
+ fprintf(stderr, " removes the need for working VA-API encoding)\n");
fprintf(stderr, " --x264-preset x264 quality preset (default " X264_DEFAULT_PRESET ")\n");
fprintf(stderr, " --x264-tune x264 tuning (default " X264_DEFAULT_TUNE ", can be blank)\n");
+ fprintf(stderr, " --x264-speedcontrol try to match x264 preset to available CPU speed\n");
+ fprintf(stderr, " --x264-speedcontrol-verbose output speedcontrol debugging statistics\n");
+ fprintf(stderr, " --x264-bitrate x264 bitrate (in kilobit/sec, default %d)\n",
+ DEFAULT_X264_OUTPUT_BIT_RATE);
+ fprintf(stderr, " --x264-crf=VALUE quality-based VBR (-12 to 51), incompatible with --x264-bitrate and VBV\n");
+ fprintf(stderr, " --x264-vbv-bufsize x264 VBV size (in kilobits, 0 = one-frame VBV,\n");
+ fprintf(stderr, " default: same as --x264-bitrate, that is, one-second VBV)\n");
+ fprintf(stderr, " --x264-vbv-max-bitrate x264 local max bitrate (in kilobit/sec per --vbv-bufsize,\n");
+ fprintf(stderr, " 0 = no limit, default: same as --x264-bitrate, i.e., CBR)\n");
+ fprintf(stderr, " --x264-param=NAME[,VALUE] set any x264 parameter, for fine tuning\n");
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, " (default is to use the same as for the recording)\n");
fprintf(stderr, " --http-coarse-timebase use less timebase for HTTP (recommended for muxers\n");
fprintf(stderr, " that handle large pts poorly, like e.g. MP4)\n");
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");
+ fprintf(stderr, " (--disable-gain-staging-auto)\n");
+ fprintf(stderr, " --disable-locut turn off locut filter (also --enable)\n");
+ fprintf(stderr, " --disable-gain-staging-auto turn off automatic gain staging (also --enable)\n");
+ fprintf(stderr, " --disable-compressor turn off regular compressor (also --enable)\n");
+ fprintf(stderr, " --disable-limiter turn off limiter (also --enable)\n");
+ fprintf(stderr, " --disable-makeup-gain-auto turn off auto-adjustment of final makeup gain (also --enable)\n");
+ fprintf(stderr, " --disable-alsa-output disable audio monitoring via ALSA\n");
fprintf(stderr, " --no-flush-pbos do not explicitly signal texture data uploads\n");
fprintf(stderr, " (will give display corruption, but makes it\n");
fprintf(stderr, " possible to run with apitrace in real time)\n");
+ fprintf(stderr, " --print-video-latency print out measurements of video latency on stdout\n");
+ fprintf(stderr, " --max-input-queue-frames=FRAMES never keep more than FRAMES frames for each card\n");
+ fprintf(stderr, " (default 6, minimum 1)\n");
+ fprintf(stderr, " --audio-queue-length-ms=MS length of audio resampling queue (default 100.0)\n");
+ fprintf(stderr, " --output-ycbcr-coefficients={rec601,rec709,auto}\n");
+ fprintf(stderr, " Y'CbCr coefficient standard of output (default auto)\n");
+ fprintf(stderr, " auto is rec601, unless --output-card is used\n");
+ fprintf(stderr, " and a Rec. 709 mode (typically HD modes) is in use\n");
+ fprintf(stderr, " --output-buffer-frames=NUM number of frames in output buffer for --output-card,\n");
+ fprintf(stderr, " can be fractional (default 6.0); note also\n");
+ fprintf(stderr, " the audio queue can't be much longer than this\n");
+ fprintf(stderr, " --output-slop-frames=NUM if more less than this number of frames behind for\n");
+ fprintf(stderr, " --output-card, try to submit anyway instead of\n");
+ fprintf(stderr, " dropping the frame (default 0.5)\n");
+ fprintf(stderr, " --timecode-stream show timestamp and timecode in stream\n");
+ fprintf(stderr, " --timecode-stdout show timestamp and timecode on standard output\n");
+ fprintf(stderr, " --10-bit-input use 10-bit video input (requires compute shaders)\n");
+ fprintf(stderr, " --10-bit-output use 10-bit video output (requires compute shaders,\n");
+ fprintf(stderr, " implies --record-x264-video)\n");
}
void parse_flags(int argc, char * const argv[])
{
static const option long_options[] = {
- { "help", no_argument, 0, 'h' },
+ { "help", no_argument, 0, OPTION_HELP },
+ { "width", required_argument, 0, 'w' },
+ { "height", required_argument, 0, 'h' },
{ "num-cards", required_argument, 0, 'c' },
+ { "output-card", required_argument, 0, 'o' },
{ "theme", required_argument, 0, 't' },
- { "va-display", required_argument, 0, 1000 },
- { "http-uncompressed-video", no_argument, 0, 1001 },
- { "http-x264-video", no_argument, 0, 1008 },
- { "x264-preset", required_argument, 0, 1009 },
- { "x264-tune", required_argument, 0, 1010 },
- { "http-mux", required_argument, 0, 1004 },
- { "http-coarse-timebase", no_argument, 0, 1005 },
- { "http-audio-codec", required_argument, 0, 1006 },
- { "http-audio-bitrate", required_argument, 0, 1007 },
- { "flat-audio", no_argument, 0, 1002 },
- { "no-flush-pbos", no_argument, 0, 1003 },
+ { "theme-dir", required_argument, 0, 'I' },
+ { "map-signal", required_argument, 0, 'm' },
+ { "input-mapping", required_argument, 0, 'M' },
+ { "va-display", required_argument, 0, 'v' },
+ { "multichannel", no_argument, 0, OPTION_MULTICHANNEL },
+ { "midi-mapping", required_argument, 0, OPTION_MIDI_MAPPING },
+ { "fake-cards-audio", no_argument, 0, OPTION_FAKE_CARDS_AUDIO },
+ { "http-uncompressed-video", no_argument, 0, OPTION_HTTP_UNCOMPRESSED_VIDEO },
+ { "http-x264-video", no_argument, 0, OPTION_HTTP_X264_VIDEO },
+ { "record-x264-video", no_argument, 0, OPTION_RECORD_X264_VIDEO },
+ { "x264-preset", required_argument, 0, OPTION_X264_PRESET },
+ { "x264-tune", required_argument, 0, OPTION_X264_TUNE },
+ { "x264-speedcontrol", no_argument, 0, OPTION_X264_SPEEDCONTROL },
+ { "x264-speedcontrol-verbose", no_argument, 0, OPTION_X264_SPEEDCONTROL_VERBOSE },
+ { "x264-bitrate", required_argument, 0, OPTION_X264_BITRATE },
+ { "x264-crf", required_argument, 0, OPTION_X264_CRF },
+ { "x264-vbv-bufsize", required_argument, 0, OPTION_X264_VBV_BUFSIZE },
+ { "x264-vbv-max-bitrate", required_argument, 0, OPTION_X264_VBV_MAX_BITRATE },
+ { "x264-param", required_argument, 0, OPTION_X264_PARAM },
+ { "http-mux", required_argument, 0, OPTION_HTTP_MUX },
+ { "http-coarse-timebase", no_argument, 0, OPTION_HTTP_COARSE_TIMEBASE },
+ { "http-audio-codec", required_argument, 0, OPTION_HTTP_AUDIO_CODEC },
+ { "http-audio-bitrate", required_argument, 0, OPTION_HTTP_AUDIO_BITRATE },
+ { "flat-audio", no_argument, 0, OPTION_FLAT_AUDIO },
+ { "gain-staging", required_argument, 0, OPTION_GAIN_STAGING },
+ { "disable-locut", no_argument, 0, OPTION_DISABLE_LOCUT },
+ { "enable-locut", no_argument, 0, OPTION_ENABLE_LOCUT },
+ { "disable-gain-staging-auto", no_argument, 0, OPTION_DISABLE_GAIN_STAGING_AUTO },
+ { "enable-gain-staging-auto", no_argument, 0, OPTION_ENABLE_GAIN_STAGING_AUTO },
+ { "disable-compressor", no_argument, 0, OPTION_DISABLE_COMPRESSOR },
+ { "enable-compressor", no_argument, 0, OPTION_ENABLE_COMPRESSOR },
+ { "disable-limiter", no_argument, 0, OPTION_DISABLE_LIMITER },
+ { "enable-limiter", no_argument, 0, OPTION_ENABLE_LIMITER },
+ { "disable-makeup-gain-auto", no_argument, 0, OPTION_DISABLE_MAKEUP_GAIN_AUTO },
+ { "enable-makeup-gain-auto", no_argument, 0, OPTION_ENABLE_MAKEUP_GAIN_AUTO },
+ { "disable-alsa-output", no_argument, 0, OPTION_DISABLE_ALSA_OUTPUT },
+ { "no-flush-pbos", no_argument, 0, OPTION_NO_FLUSH_PBOS },
+ { "print-video-latency", no_argument, 0, OPTION_PRINT_VIDEO_LATENCY },
+ { "max-input-queue-frames", required_argument, 0, OPTION_MAX_INPUT_QUEUE_FRAMES },
+ { "audio-queue-length-ms", required_argument, 0, OPTION_AUDIO_QUEUE_LENGTH_MS },
+ { "output-ycbcr-coefficients", required_argument, 0, OPTION_OUTPUT_YCBCR_COEFFICIENTS },
+ { "output-buffer-frames", required_argument, 0, OPTION_OUTPUT_BUFFER_FRAMES },
+ { "output-slop-frames", required_argument, 0, OPTION_OUTPUT_SLOP_FRAMES },
+ { "timecode-stream", no_argument, 0, OPTION_TIMECODE_STREAM },
+ { "timecode-stdout", no_argument, 0, OPTION_TIMECODE_STDOUT },
+ { "10-bit-input", no_argument, 0, OPTION_10_BIT_INPUT },
+ { "10-bit-output", no_argument, 0, OPTION_10_BIT_OUTPUT },
{ 0, 0, 0, 0 }
};
+ vector<string> theme_dirs;
+ string output_ycbcr_coefficients = "auto";
for ( ;; ) {
int option_index = 0;
- int c = getopt_long(argc, argv, "c:t:", long_options, &option_index);
+ int c = getopt_long(argc, argv, "c:t:I:v:m:M:w:h:", long_options, &option_index);
if (c == -1) {
break;
}
switch (c) {
+ case 'w':
+ global_flags.width = atoi(optarg);
+ break;
+ case 'h':
+ global_flags.height = atoi(optarg);
+ break;
case 'c':
global_flags.num_cards = atoi(optarg);
break;
+ case 'o':
+ global_flags.output_card = atoi(optarg);
+ break;
case 't':
global_flags.theme_filename = optarg;
break;
- case 1000:
+ case 'I':
+ theme_dirs.push_back(optarg);
+ break;
+ case 'm': {
+ char *ptr = strchr(optarg, ',');
+ if (ptr == nullptr) {
+ fprintf(stderr, "ERROR: Invalid argument '%s' to --map-signal (needs a signal and a card number, separated by comma)\n", optarg);
+ exit(1);
+ }
+ *ptr = '\0';
+ const int signal_num = atoi(optarg);
+ const int card_num = atoi(ptr + 1);
+ if (global_flags.default_stream_mapping.count(signal_num)) {
+ fprintf(stderr, "ERROR: Signal %d already mapped to card %d\n",
+ signal_num, global_flags.default_stream_mapping[signal_num]);
+ exit(1);
+ }
+ global_flags.default_stream_mapping[signal_num] = card_num;
+ break;
+ }
+ case 'M':
+ global_flags.input_mapping_filename = optarg;
+ break;
+ case OPTION_MULTICHANNEL:
+ global_flags.multichannel_mapping_mode = true;
+ break;
+ case 'v':
global_flags.va_display = optarg;
break;
- case 1001:
+ case OPTION_MIDI_MAPPING:
+ global_flags.midi_mapping_filename = optarg;
+ global_flags.multichannel_mapping_mode = true;
+ break;
+ case OPTION_FAKE_CARDS_AUDIO:
+ global_flags.fake_cards_audio = true;
+ break;
+ case OPTION_HTTP_UNCOMPRESSED_VIDEO:
global_flags.uncompressed_video_to_http = true;
break;
- case 1004:
+ case OPTION_HTTP_MUX:
global_flags.stream_mux_name = optarg;
break;
- case 1005:
+ case OPTION_HTTP_COARSE_TIMEBASE:
global_flags.stream_coarse_timebase = true;
break;
- case 1006:
+ case OPTION_HTTP_AUDIO_CODEC:
global_flags.stream_audio_codec_name = optarg;
break;
- case 1007:
+ case OPTION_HTTP_AUDIO_BITRATE:
global_flags.stream_audio_codec_bitrate = atoi(optarg) * 1000;
break;
- case 1008:
+ case OPTION_HTTP_X264_VIDEO:
+ global_flags.x264_video_to_http = true;
+ break;
+ case OPTION_RECORD_X264_VIDEO:
+ global_flags.x264_video_to_disk = true;
global_flags.x264_video_to_http = true;
break;
- case 1009:
+ case OPTION_X264_PRESET:
global_flags.x264_preset = optarg;
break;
- case 1010:
+ case OPTION_X264_TUNE:
global_flags.x264_tune = optarg;
break;
- case 1002:
- global_flags.flat_audio = true;
+ case OPTION_X264_SPEEDCONTROL:
+ global_flags.x264_speedcontrol = true;
+ break;
+ case OPTION_X264_SPEEDCONTROL_VERBOSE:
+ global_flags.x264_speedcontrol_verbose = true;
+ break;
+ case OPTION_X264_BITRATE:
+ global_flags.x264_bitrate = atoi(optarg);
+ break;
+ case OPTION_X264_CRF:
+ global_flags.x264_crf = atof(optarg);
+ break;
+ case OPTION_X264_VBV_BUFSIZE:
+ global_flags.x264_vbv_buffer_size = atoi(optarg);
break;
- case 1003:
+ case OPTION_X264_VBV_MAX_BITRATE:
+ global_flags.x264_vbv_max_bitrate = atoi(optarg);
+ break;
+ case OPTION_X264_PARAM:
+ global_flags.x264_extra_param.push_back(optarg);
+ break;
+ case OPTION_FLAT_AUDIO:
+ // If --flat-audio is given, turn off everything that messes with the sound,
+ // except the final makeup gain.
+ global_flags.locut_enabled = false;
+ global_flags.gain_staging_auto = false;
+ global_flags.compressor_enabled = false;
+ global_flags.limiter_enabled = false;
+ break;
+ case OPTION_GAIN_STAGING:
+ global_flags.initial_gain_staging_db = atof(optarg);
+ global_flags.gain_staging_auto = false;
+ break;
+ case OPTION_DISABLE_LOCUT:
+ global_flags.locut_enabled = false;
+ break;
+ case OPTION_ENABLE_LOCUT:
+ global_flags.locut_enabled = true;
+ break;
+ case OPTION_DISABLE_GAIN_STAGING_AUTO:
+ global_flags.gain_staging_auto = false;
+ break;
+ case OPTION_ENABLE_GAIN_STAGING_AUTO:
+ global_flags.gain_staging_auto = true;
+ break;
+ case OPTION_DISABLE_COMPRESSOR:
+ global_flags.compressor_enabled = false;
+ break;
+ case OPTION_ENABLE_COMPRESSOR:
+ global_flags.compressor_enabled = true;
+ break;
+ case OPTION_DISABLE_LIMITER:
+ global_flags.limiter_enabled = false;
+ break;
+ case OPTION_ENABLE_LIMITER:
+ global_flags.limiter_enabled = true;
+ break;
+ case OPTION_DISABLE_MAKEUP_GAIN_AUTO:
+ global_flags.final_makeup_gain_auto = false;
+ break;
+ case OPTION_ENABLE_MAKEUP_GAIN_AUTO:
+ global_flags.final_makeup_gain_auto = true;
+ break;
+ case OPTION_DISABLE_ALSA_OUTPUT:
+ global_flags.enable_alsa_output = false;
+ break;
+ case OPTION_NO_FLUSH_PBOS:
global_flags.flush_pbos = false;
break;
- case 'h':
+ case OPTION_PRINT_VIDEO_LATENCY:
+ global_flags.print_video_latency = true;
+ break;
+ case OPTION_MAX_INPUT_QUEUE_FRAMES:
+ global_flags.max_input_queue_frames = atoi(optarg);
+ break;
+ case OPTION_AUDIO_QUEUE_LENGTH_MS:
+ global_flags.audio_queue_length_ms = atof(optarg);
+ break;
+ case OPTION_OUTPUT_YCBCR_COEFFICIENTS:
+ output_ycbcr_coefficients = optarg;
+ break;
+ case OPTION_OUTPUT_BUFFER_FRAMES:
+ global_flags.output_buffer_frames = atof(optarg);
+ break;
+ case OPTION_OUTPUT_SLOP_FRAMES:
+ global_flags.output_slop_frames = atof(optarg);
+ break;
+ case OPTION_TIMECODE_STREAM:
+ global_flags.display_timecode_in_stream = true;
+ break;
+ case OPTION_TIMECODE_STDOUT:
+ global_flags.display_timecode_on_stdout = true;
+ break;
+ case OPTION_10_BIT_INPUT:
+ global_flags.ten_bit_input = true;
+ break;
+ case OPTION_10_BIT_OUTPUT:
+ global_flags.ten_bit_output = true;
+ global_flags.x264_video_to_disk = true;
+ global_flags.x264_video_to_http = true;
+ global_flags.x264_bit_depth = 10;
+ break;
+ case OPTION_HELP:
usage();
exit(0);
default:
fprintf(stderr, "ERROR: --http-uncompressed-video and --http-x264-video are mutually incompatible\n");
exit(1);
}
+ if (global_flags.num_cards <= 0) {
+ fprintf(stderr, "ERROR: --num-cards must be at least 1\n");
+ exit(1);
+ }
+ if (global_flags.output_card < -1 ||
+ global_flags.output_card >= global_flags.num_cards) {
+ fprintf(stderr, "ERROR: --output-card points to a nonexistant card\n");
+ exit(1);
+ }
+ if (global_flags.x264_speedcontrol) {
+ if (!global_flags.x264_preset.empty() && global_flags.x264_preset != "faster") {
+ fprintf(stderr, "WARNING: --x264-preset is overridden by --x264-speedcontrol (implicitly uses \"faster\" as base preset)\n");
+ }
+ global_flags.x264_preset = "faster";
+ } else if (global_flags.x264_preset.empty()) {
+ global_flags.x264_preset = X264_DEFAULT_PRESET;
+ }
+ if (!theme_dirs.empty()) {
+ global_flags.theme_dirs = theme_dirs;
+ }
+
+ // In reality, we could probably do with any even value (we subsample
+ // by two in some places), but it's better to be on the safe side
+ // wrt. video codecs and such. (I'd set 16 if I could, but 1080 isn't
+ // divisible by 16.)
+ if (global_flags.width <= 0 || (global_flags.width % 8) != 0 ||
+ global_flags.height <= 0 || (global_flags.height % 8) != 0) {
+ fprintf(stderr, "ERROR: --width and --height must be positive integers divisible by 8\n");
+ exit(1);
+ }
+
+ for (pair<int, int> mapping : global_flags.default_stream_mapping) {
+ if (mapping.second >= global_flags.num_cards) {
+ fprintf(stderr, "ERROR: Signal %d mapped to card %d, which doesn't exist (try adjusting --num-cards)\n",
+ mapping.first, mapping.second);
+ exit(1);
+ }
+ }
+
+ // Rec. 709 would be the sane thing to do, but it seems many players
+ // just default to BT.601 coefficients no matter what. We _do_ set
+ // the right flags, so that a player that works properly doesn't have
+ // to guess, but it's frequently ignored. See discussions
+ // in e.g. https://trac.ffmpeg.org/ticket/4978; the situation with
+ // browsers is complicated and depends on things like hardware acceleration
+ // (https://bugs.chromium.org/p/chromium/issues/detail?id=333619 for
+ // extensive discussion). VLC generally fixed this as part of 3.0.0
+ // (see e.g. https://github.com/videolan/vlc/commit/bc71288b2e38c07d6921472824b92eef1aa85f7e
+ // and https://github.com/videolan/vlc/commit/c3fc2683a9cde1d42674ebf9935dced05733a215),
+ // but earlier versions were pretty random.
+ //
+ // On the other hand, HDMI/SDI output typically requires Rec. 709 for
+ // HD resolutions (with no way of signaling anything else), which is
+ // a conflicting demand. In this case, we typically let the HDMI/SDI
+ // output win if it is active, but the user can override this.
+ if (output_ycbcr_coefficients == "auto") {
+ // Essentially: BT.709 if HDMI/SDI output is on, otherwise BT.601.
+ global_flags.ycbcr_rec709_coefficients = false;
+ global_flags.ycbcr_auto_coefficients = true;
+ } else if (output_ycbcr_coefficients == "rec709") {
+ global_flags.ycbcr_rec709_coefficients = true;
+ global_flags.ycbcr_auto_coefficients = false;
+ } else if (output_ycbcr_coefficients == "rec601") {
+ global_flags.ycbcr_rec709_coefficients = false;
+ global_flags.ycbcr_auto_coefficients = false;
+ } else {
+ fprintf(stderr, "ERROR: --output-ycbcr-coefficients must be “rec601”, “rec709” or “auto”\n");
+ exit(1);
+ }
+
+ if (global_flags.output_buffer_frames < 0.0f) {
+ // Actually, even zero probably won't make sense; there is some internal
+ // delay to the card.
+ fprintf(stderr, "ERROR: --output-buffer-frames can't be negative.\n");
+ exit(1);
+ }
+ if (global_flags.output_slop_frames < 0.0f) {
+ fprintf(stderr, "ERROR: --output-slop-frames can't be negative.\n");
+ exit(1);
+ }
+ if (global_flags.max_input_queue_frames < 1) {
+ fprintf(stderr, "ERROR: --max-input-queue-frames must be at least 1.\n");
+ exit(1);
+ }
+ if (global_flags.max_input_queue_frames > 10) {
+ fprintf(stderr, "WARNING: --max-input-queue-frames has little effect over 10.\n");
+ }
+
+ if (!isinf(global_flags.x264_crf)) { // CRF mode is selected.
+ if (global_flags.x264_bitrate != -1) {
+ fprintf(stderr, "ERROR: --x264-bitrate and --x264-crf are mutually incompatible.\n");
+ exit(1);
+ }
+ if (global_flags.x264_vbv_max_bitrate != -1 && global_flags.x264_vbv_buffer_size != -1) {
+ fprintf(stderr, "WARNING: VBV settings are ignored with --x264-crf.\n");
+ }
+ } else if (global_flags.x264_bitrate == -1) {
+ global_flags.x264_bitrate = DEFAULT_X264_OUTPUT_BIT_RATE;
+ }
}