https://github.com/FFmpeg/FFmpeg/commit/e0786a8eeb9e7c8feb057e83f284491f0a87e463
always 1
diff --git a/src/media/video/accel.cpp b/src/media/video/accel.cpp
index 314ca86..4888352 100644
--- a/src/media/video/accel.cpp
+++ b/src/media/video/accel.cpp
@@ -310,7 +310,6 @@ HardwareAccel::setDetails(AVCodecContext* codecCtx)
     if (type_ == CODEC_DECODER) {
         codecCtx->hw_device_ctx = av_buffer_ref(deviceCtx_);
         codecCtx->get_format = getFormatCb;
-        codecCtx->thread_safe_callbacks = 1;
     } else if (type_ == CODEC_ENCODER) {
         if (framesCtx_)
             // encoder doesn't need a device context, only a frame context