Switch to using avcodec_decode_audio4, avcodec_alloc_context3.

media/filters/ffmpeg_video_decoder.cc

Index: media/filters/ffmpeg_video_decoder.cc
diff --git a/media/filters/ffmpeg_video_decoder.cc b/media/filters/ffmpeg_video_decoder.cc
index 81ddd8bee2e52e7a4fcf6c3f8d9908a381c23d88..41bd0e49f60c95da847132362fab7f2cdbd4dd24 100644
--- a/media/filters/ffmpeg_video_decoder.cc
+++ b/media/filters/ffmpeg_video_decoder.cc
@@ -96,7 +96,7 @@ void FFmpegVideoDecoder::Initialize(const scoped_refptr<DemuxerStream>& stream,
   }
 
   // Initialize AVCodecContext structure.
-  codec_context_ = avcodec_alloc_context();
+  codec_context_ = avcodec_alloc_context3(NULL);
   VideoDecoderConfigToAVCodecContext(config, codec_context_);
 
   // Enable motion vector search (potentially slow), strong deblocking filter
@@ -323,6 +323,9 @@ bool FFmpegVideoDecoder::Decode(
   // Let FFmpeg handle presentation timestamp reordering.
   codec_context_->reordered_opaque = buffer->GetTimestamp().InMicroseconds();
 
+  // Reset frame to default values.
+  avcodec_get_frame_defaults(av_frame_);
+
   // This is for codecs not using get_buffer to initialize
   // |av_frame_->reordered_opaque|
   av_frame_->reordered_opaque = codec_context_->reordered_opaque;