int ret = av_opt_copy(thread_avctx->priv_data, avctx->priv_data);
if (ret < 0)
goto fail;
- } else
+ } else if (avctx->codec->priv_data_size) {
memcpy(thread_avctx->priv_data, avctx->priv_data, avctx->codec->priv_data_size);
+ }
thread_avctx->thread_count = 1;
thread_avctx->active_thread_type &= ~FF_THREAD_FRAME;