ffmpeg | branch: release/4.1 | Mark Thompson <s...@jkqxz.net> | Sun Jul 28 
19:23:15 2019 +0100| [07afe2e3ca2e33a52acd142ba0595e495589de96] | committer: 
James Almer

cbs_h264: Fix missing inferred colour description fields

With video_signal_type_present_flag set but colour_description_present_flag
unset the colour fields would not have had their correct values inferred.

(cherry picked from commit f9b8503639c0ff90846f07c92e2fe7836690dd0c)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=07afe2e3ca2e33a52acd142ba0595e495589de96
---

 libavcodec/cbs_h264_syntax_template.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavcodec/cbs_h264_syntax_template.c 
b/libavcodec/cbs_h264_syntax_template.c
index 07b4cddb5e..57fc02082c 100644
--- a/libavcodec/cbs_h264_syntax_template.c
+++ b/libavcodec/cbs_h264_syntax_template.c
@@ -137,6 +137,10 @@ static int FUNC(vui_parameters)(CodedBitstreamContext 
*ctx, RWContext *rw,
             u(8, colour_primaries,         0, 255);
             u(8, transfer_characteristics, 0, 255);
             u(8, matrix_coefficients,      0, 255);
+        } else {
+            infer(colour_primaries,         2);
+            infer(transfer_characteristics, 2);
+            infer(matrix_coefficients,      2);
         }
     } else {
         infer(video_format,             5);

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