diff --git a/src/FFmpegReader.cpp b/src/FFmpegReader.cpp
index 6d8f9ccd..c23680ed 100644
--- a/src/FFmpegReader.cpp
+++ b/src/FFmpegReader.cpp
@@ -555,12 +555,16 @@ void FFmpegReader::Open() {
 		}
 
 		// If "rotate" isn't already set, extract it from the video stream's side data.
+		// TODO: nb_side_data is depreciated, and I'm not sure the preferred way to do this
 		if (info.metadata.find("rotate") == info.metadata.end()) {
 			for (unsigned int i = 0; i < pFormatCtx->nb_streams; i++) {
 				if (pFormatCtx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 					for (int j = 0; j < pFormatCtx->streams[i]->nb_side_data; j++) {
-						// Use the address-of operator to get a pointer to the j-th element.
+						// Get the j-th side data element.
 						AVPacketSideData *sd = &pFormatCtx->streams[i]->side_data[j];
+#pragma GCC diagnostic pop
 						if (sd->type == AV_PKT_DATA_DISPLAYMATRIX && sd->size >= 9 * sizeof(int32_t)) {
 							double rotation = -av_display_rotation_get(reinterpret_cast<int32_t *>(sd->data));
 							if (isnan(rotation))