Clearify -a empty string behavior

1 files changed, 1 insertions, 0 deletions

diff --git a/src/main.cpp b/src/main.cpp
index 074e7e3..06ce49e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -848,6 +848,7 @@ static void usage_full() {
     fprintf(stderr, "  -a    Audio device to record from (pulse audio device). Can be specified multiple times. Each time this is specified a new audio track is added for the specified audio device.\n");
     fprintf(stderr, "        A name can be given to the audio input device by prefixing the audio input with <name>/, for example \"dummy/alsa_output.pci-0000_00_1b.0.analog-stereo.monitor\".\n");
     fprintf(stderr, "        Multiple audio devices can be merged into one audio track by using \"|\" as a separator into one -a argument, for example: -a \"alsa_output1|alsa_output2\".\n");
+    fprintf(stderr, "        If the audio device is an empty string then the audio device is ignored.\n");
     fprintf(stderr, "        Optional, no audio track is added by default.\n");
     fprintf(stderr, "\n");
     fprintf(stderr, "  -q    Video quality. Should be either 'medium', 'high', 'very_high' or 'ultra'. 'high' is the recommended option when live streaming or when you have a slower harddrive.\n");