Set the global header flag if the container format requires it

dimula73 · dimula73 · commit 054678c7f4ee · 2016-06-06T19:37:23.000+03:00
Some containers, e.g. Matroska, requires the headers be written
in the global headers section, not in each packet. The encoder
should be notified, if that is the case.
diff --git a/src/AvTranscoder/file/OutputFile.cpp b/src/AvTranscoder/file/OutputFile.cpp
@@ -42,6 +42,16 @@ IOutputStream& OutputFile::addVideoStream(const VideoCodec& videoDesc)
     stream.codec->level = videoDesc.getAVCodecContext().level;
     stream.codec->field_order = videoDesc.getAVCodecContext().field_order;
 
+    if (_formatContext.getAVOutputFormat().flags & AVFMT_GLOBALHEADER) {
+        stream.codec->flags = CODEC_FLAG_GLOBAL_HEADER;
+    }
+
+    // if the codec is experimental, allow it
+    if(videoDesc.getAVCodec().capabilities & CODEC_CAP_EXPERIMENTAL) {
+        LOG_WARN("This codec is considered experimental by libav/ffmpeg:" << videoDesc.getCodecName());
+        stream.codec->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
+    }
+
     // some codecs need/can use extradata to decode
     uint8_t* srcExtradata = videoDesc.getAVCodecContext().extradata;
     const int srcExtradataSize = videoDesc.getAVCodecContext().extradata_size;
