fix docs for --serial-number option

diff --git a/src/flac/main.c b/src/flac/main.c
index 45b678c..8f6c6c4 100644 (file)
--- a/src/flac/main.c
+++ b/src/flac/main.c
@@ -1268,9 +1268,10 @@ void show_explain()
        printf("                               '.ogg'.\n");
        printf("      --serial-number          Serial number to use for the FLAC stream.  When\n");
        printf("                               encoding and no serial number is given, flac\n");
-       printf("                               uses '0'.  When decoding and no number is\n");
-       printf("                               given, flac uses the serial number of the first\n");
-       printf("                               page.\n");
+       printf("                               uses a random one.  If encoding to multiple files\n");
+       printf("                               the serial number is incremented for each file.\n");
+       printf("                               When decoding and no number is given, flac uses\n");
+       printf("                               the serial number of the first page.\n");
 #endif
        printf("analysis options:\n");
        printf("      --residual-text          Include residual signal in text output.  This\n");