tools/aviocat: add verbose mode.

For now: print the input size as detected by AVSEEK_SIZE.

tools/aviocat.c

@@ -26,14 +26,14 @@
 
 static int usage(const char *argv0, int ret)
 {
-    fprintf(stderr, "%s [-b bytespersec] [-d duration] [-oi <options>] [-oo <options>] input_url output_url\n", argv0);
+    fprintf(stderr, "%s [-b bytespersec] [-d duration] [-oi <options>] [-oo <options>] [-v] input_url output_url\n", argv0);
     fprintf(stderr, "<options>: AVOptions expressed as key=value, :-separated\n");
     return ret;
 }
 
 int main(int argc, char **argv)
 {
-    int bps = 0, duration = 0, ret, i;
+    int bps = 0, duration = 0, verbose = 0, ret, i;
     const char *input_url = NULL, *output_url = NULL;
     int64_t stream_pos = 0;
     int64_t start_time;
@@ -65,6 +65,8 @@ int main(int argc, char **argv)
                 return usage(argv[0], 1);
             }
             i++;
+        } else if (!strcmp(argv[i], "-v")) {
+            verbose = 1;
         } else if (!input_url) {
             input_url = argv[i];
         } else if (!output_url) {
@@ -82,6 +84,14 @@ int main(int argc, char **argv)
         fprintf(stderr, "Unable to open %s: %s\n", input_url, errbuf);
         return 1;
     }
+    if (verbose) {
+        int64_t size = avio_seek(input, 0, AVSEEK_SIZE);
+        if (size >= 0) {
+            fprintf(stderr, "aviocat: input size: %"PRId64"\n", size);
+        } else {
+            fprintf(stderr, "aviocat: input size: unknown\n");
+        }
+    }
     if (duration && !bps) {
         int64_t size = avio_size(input);
         if (size < 0) {