Otherwise, AV1 encodes with FFmpeg trigger use-of-uninitialized-value
warnings under MemorySanitizer, and the output buffer potentially
changes from run to run.
---
libavformat/av1.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/libavformat/av1.c b/libavformat/av1.c
index a0aad436a6..5fde8df97e 100644
--- a/libavformat/av1.c
+++ b/libavformat/av1.c
@@ -372,6 +372,7 @@ int ff_isom_write_av1c(AVIOContext *pb, const uint8_t *buf,
int size)
put_bits(&pbc, 1, seq_params.chroma_subsampling_x);
put_bits(&pbc, 1, seq_params.chroma_subsampling_y);
put_bits(&pbc, 2, seq_params.chroma_sample_position);
+ put_bits(&pbc, 8, 0); // padding
flush_put_bits(&pbc);
avio_write(pb, header, sizeof(header));
--
2.21.0.392.gf8f6787159e-goog
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