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 rec709 if and only if --output-card is used\n");
- fprintf(stderr, " and a HD resolution is set\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");
// 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, but the user can override this.
+ // output win if it is active, but the user can override this.
if (output_ycbcr_coefficients == "auto") {
- if (global_flags.output_card >= 0 && global_flags.width >= 1280) {
- global_flags.ycbcr_rec709_coefficients = true;
- } else {
- global_flags.ycbcr_rec709_coefficients = false;
- }
+ // 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);