ffmpegのDecklink使用時のno signalのカラーバーを黒画面にする

colorbar.patch

diff --git libavdevice/decklink_dec.cpp libavdevice/decklink_dec.cpp
index 747f47e..d43faed 100644
--- libavdevice/decklink_dec.cpp
+++ libavdevice/decklink_dec.cpp
@@ -235,8 +235,8 @@ HRESULT decklink_input_callback::VideoInputFrameArrived(
         if (videoFrame->GetFlags() & bmdFrameHasNoInputSource) {
             if (videoFrame->GetPixelFormat() == bmdFormat8BitYUV) {
             unsigned bars[8] = {
-                0xEA80EA80, 0xD292D210, 0xA910A9A5, 0x90229035,
-                0x6ADD6ACA, 0x51EF515A, 0x286D28EF, 0x10801080 };
+                0x10801080, 0x10801080, 0x10801080, 0x10801080,
+                0x10801080, 0x10801080, 0x10801080, 0x10801080 };
             int width  = videoFrame->GetWidth();
             int height = videoFrame->GetHeight();
             unsigned *p = (unsigned *)frameBytes;