Allow ffmpeg to process individual NALU rather than require frames.

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 aaa8a684c703d452ec5cfb1382db9d89ad250053..f56a356e758d6c555b82933b07dc412d27548d41 100644
--- a/media/filters/ffmpeg_video_decoder.cc
+++ b/media/filters/ffmpeg_video_decoder.cc
@@ -68,7 +68,8 @@ static void ReleaseVideoBufferImpl(void* opaque, uint8* data) {
 
 FFmpegVideoDecoder::FFmpegVideoDecoder(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner)
-    : task_runner_(task_runner), state_(kUninitialized) {}
+    : task_runner_(task_runner), state_(kUninitialized),
+      decode_nalus_(false) {}
 
 int FFmpegVideoDecoder::GetVideoBuffer(struct AVCodecContext* codec_context,
                                        AVFrame* frame,
@@ -360,6 +361,9 @@ bool FFmpegVideoDecoder::ConfigureDecoder(bool low_delay) {
   codec_context_->get_buffer2 = GetVideoBufferImpl;
   codec_context_->refcounted_frames = 1;
 
+  if (decode_nalus_)
+    codec_context_->flags2 |= CODEC_FLAG2_CHUNKS;
+
   AVCodec* codec = avcodec_find_decoder(codec_context_->codec_id);
   if (!codec || avcodec_open2(codec_context_.get(), codec, NULL) < 0) {
     ReleaseFFmpegResources();