avcodec/decode: copy the output parameters from the last bsf in the chain back to the AVCodecContext

Certain AVCodecParameters, like the contents of the extradata, may be changed
by the init() function of any of the bitstream filters in the chain.

Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/libavcodec/decode.c b/libavcodec/decode.c
index 2e82f6b506..4607e9f318 100644
--- a/libavcodec/decode.c
+++ b/libavcodec/decode.c
@@ -281,6 +281,10 @@ int ff_decode_bsfs_init(AVCodecContext *avctx)
             bsfs_str++;
     }
 
+    ret = avcodec_parameters_to_context(avctx, s->bsfs[s->nb_bsfs - 1]->par_out);
+    if (ret < 0)
+        return ret;
+
     return 0;
 fail:
     ff_decode_bsfs_uninit(avctx);