rec bug fix

zhangmeng

2019-10-22 7fe46306ac577db11ba8a8bbf20653861fcb1a1a

 csrc/ffmpeg/format/FormatOut.cpp

@@ -399,7 +399,7 @@
        int out_idx = -1;
        std::vector<AVStream*> in_streams{in_v_stream_, in_a_stream_};
        for (auto i : in_streams){
            if (i->index == pkt->stream_index){
            if (i && (i->index == pkt->stream_index)){
                if (i->codecpar->codec_type == AVMEDIA_TYPE_VIDEO){
                    out_idx = v_idx_;
                    in_stream = i;