encoder: Properly flush delayed encoders

source/encoder.cpp

@@ -603,24 +603,26 @@ obsffmpeg::encoder::encoder(obs_data_t* settings, obs_encoder_t* encoder)
 
 obsffmpeg::encoder::~encoder()
 {
+	if (this->context) {
+		// Flush encoders that require it.
+		if ((this->codec->capabilities & AV_CODEC_CAP_DELAY) != 0) {
+			avcodec_send_frame(this->context, nullptr);
+			while (avcodec_receive_packet(this->context, &this->current_packet) >= 0) {
+				avcodec_send_frame(this->context, nullptr);
+				std::this_thread::sleep_for(std::chrono::milliseconds(1));
+			}
+		}
+
+		// Close and free context.
+		avcodec_close(this->context);
+		avcodec_free_context(&this->context);
+	}
+
 	av_packet_unref(&this->current_packet);
 
 	this->frame_queue.clear();
 	this->frame_queue_used.clear();
 	this->swscale.finalize();
-
-	if (this->context) {
-		// Flush encoders that require it.
-		if ((this->codec->capabilities & AV_CODEC_CAP_DELAY) != 0) {
-			avcodec_send_frame(this->context, nullptr);
-			while (avcodec_receive_packet(this->context, &this->current_packet) != AVERROR(EOF)) {
-				std::this_thread::sleep_for(std::chrono::milliseconds(1));
-			}
-		}
-
-		avcodec_close(this->context);
-		avcodec_free_context(&this->context);
-	}
 }
 
 void obsffmpeg::encoder::get_properties(obs_properties_t* props)