static av_cold int vtenc_close(AVCodecContext *avctx) { VTEncContext *vtctx = avctx->priv_data; if(!vtctx->session) return 0; VTCompressionSessionInvalidate(vtctx->session); pthread_cond_destroy(&vtctx->cv_sample_sent); pthread_mutex_destroy(&vtctx->lock); CFRelease(vtctx->session); vtctx->session = NULL; return 0; }