Log timestamps when old frames are delivered.

webrtc/video/video_capture_input.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 83 matching lines @@
   }
 
   // Convert NTP time, in ms, to RTP timestamp.
   const int kMsToRtpTimestamp = 90;
   incoming_frame.set_timestamp(
       kMsToRtpTimestamp * static_cast<uint32_t>(incoming_frame.ntp_time_ms()));
 
   CriticalSectionScoped cs(capture_cs_.get());
   if (incoming_frame.ntp_time_ms() <= last_captured_timestamp_) {
     // We don't allow the same capture time for two frames, drop this one.
-    LOG(LS_WARNING) << "Same/old NTP timestamp for incoming frame. Dropping.";
+    LOG(LS_WARNING) << "Same/old NTP timestamp ("
+                    << incoming_frame.ntp_time_ms()
+                    << " <= " << last_captured_timestamp_
+                    << ") for incoming frame. Dropping.";
     return;
   }
 
   captured_frame_.ShallowCopy(incoming_frame);
   last_captured_timestamp_ = incoming_frame.ntp_time_ms();
 
   overuse_detector_->FrameCaptured(captured_frame_.width(),
                                    captured_frame_.height(),
                                    captured_frame_.render_time_ms());
 
@@ skipping 38 matching lines @@
   }
   // We're done!
   if (capture_time != -1) {
     overuse_detector_->FrameSent(capture_time);
   }
   return true;
 }
 
 }  // namespace internal
 }  // namespace webrtc