Fix black screen issues when reopening/out of reverse

mazda/outputs.cpp

@@ -466,9 +466,12 @@ VideoOutput::VideoOutput(MazdaEventCallbacks* callbacks)
    input_thread_quit_pipe_write = quitpiperw[1];

    input_thread = std::thread([this](){ input_thread_func(); } );

    //Drop caches before staing new video
    sync();
    std::ofstream ofs("/proc/sys/vm/drop_caches");
    ofs << "3" << std::endl;
    //if we have ASPECT_RATIO_FIX, cut off the bottom black bar
    const char* vid_pipeline_launch = "appsrc name=mysrc is-live=true block=false max-latency=1000000 do-timestamp=true ! queue ! h264parse ! vpudec low-latency=true framedrop=true framedrop-level-mask=0x200 ! mfw_isink name=mysink "
    const char* vid_pipeline_launch = "appsrc name=mysrc is-live=true block=false max-latency=1000000 do-timestamp=true ! queue ! h264parse ! vpudec low-latency=true framedrop=true framedrop-level-mask=0x200 frame-plus=1 ! mfw_isink name=mysink "
    #if ASPECT_RATIO_FIX
    "axis-left=0 axis-top=-20 disp-width=800 disp-height=520"
    #else