ffmpeg better message for error on opening file if the file opens but the codec is not supported.

BUG=37256
TEST=ffmpeg_tests.exe d:\mediatests\elephant2.m4v with chromium and you should get 'File format not supported'

Review URL: http://codereview.chromium.org/661426

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@40472 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 13 insertions, 3 deletions

diff --git a/media/tools/media_bench/media_bench.cc b/media/tools/media_bench/media_bench.cc
index 5e1b844..57217dc 100644
--- a/media/tools/media_bench/media_bench.cc
+++ b/media/tools/media_bench/media_bench.cc
@@ -212,9 +212,19 @@ int main(int argc, const char** argv) {
   av_register_all();
   av_register_protocol(&kFFmpegFileProtocol);
   AVFormatContext* format_context = NULL;
-  if (av_open_input_file(&format_context, in_path.c_str(), NULL, 0, NULL) < 0) {
-    std::cerr << "Error: Could not open input for "
-              << in_path << std::endl;
+  int result = av_open_input_file(&format_context, in_path.c_str(),
+                                  NULL, 0, NULL);
+  if (result < 0) {
+    switch (result) {
+      case AVERROR_NOFMT:
+        std::cerr << "Error: File format not supported "
+                  << in_path << std::endl;
+        break;
+      default:
+        std::cerr << "Error: Could not open input for "
+                  << in_path << std::endl;
+        break;
+    }
     return 1;
   }