[FFmpeg-devel] [PATCH] avcodec/libtheora: fix setting keyframe_mask

[FFmpeg-devel] [PATCH] avcodec/libtheora: fix setting keyframe_mask

[James Almer]

t_info.keyframe_granule_shift is set to the library default of 6, which is ok
for gop sizes up to 63. Since there's apparently no way to query the updated
value after having forced a gop value with TH_ENCCTL_SET_KEYFRAME_FREQUENCY_FORCE,
calculate it manually instead.

Fixes ticket #11454.

Signed-off-by: James Almer <jamrial@gmail.com>
---
 libavcodec/libtheoraenc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/libtheoraenc.c b/libavcodec/libtheoraenc.c
index 8844f4be6a..761cd45d44 100644
--- a/libavcodec/libtheoraenc.c
+++ b/libavcodec/libtheoraenc.c
@@ -234,7 +234,7 @@ static av_cold int encode_init(AVCodecContext* avc_context)
         return AVERROR_EXTERNAL;
     }
 
-    h->keyframe_mask = (1 << t_info.keyframe_granule_shift) - 1;
+    h->keyframe_mask = (1 << av_ceil_log2(avc_context->gop_size)) - 1;
     /* Clear up theora_info struct */
     th_info_clear(&t_info);
 
-- 
2.48.1

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