Seek for video track changes on FFmpegDemuxer.

media/blink/webmediaplayer_impl.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/blink/webmediaplayer_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <string>
@@ skipping 2290 matching lines @@
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   return pipeline_media_duration_for_test_.value_or(
       pipeline_controller_.GetMediaDuration());
 }
 
 void WebMediaPlayerImpl::ReportTimeFromForegroundToFirstFrame(
     base::TimeTicks foreground_time,
     base::TimeTicks new_frame_time) {
   base::TimeDelta time_to_first_frame = new_frame_time - foreground_time;
+  LOG(ERROR) << __func__ << " : " << time_to_first_frame.InMillisecondsF()
+             << "ms";
   if (HasAudio()) {
     UMA_HISTOGRAM_TIMES(
         "Media.Video.TimeFromForegroundToFirstFrame.DisableTrack",
         time_to_first_frame);
   } else {
     UMA_HISTOGRAM_TIMES("Media.Video.TimeFromForegroundToFirstFrame.Paused",
                         time_to_first_frame);
   }
 }
 void WebMediaPlayerImpl::SwitchRenderer(bool disable_pipeline_auto_suspend) {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
   disable_pipeline_auto_suspend_ = disable_pipeline_auto_suspend;
   ScheduleRestart();
 }
 
 void WebMediaPlayerImpl::RecordUnderflowDuration(base::TimeDelta duration) {
   DCHECK(data_source_ || chunk_demuxer_);
   if (data_source_)
     UMA_HISTOGRAM_TIMES("Media.UnderflowDuration", duration);
   else
     UMA_HISTOGRAM_TIMES("Media.UnderflowDuration.MSE", duration);
 }
 
 }  // namespace media