https://bugs.gentoo.org/961947
https://github.com/dirkvdb/ffmpegthumbnailer/pull/240
--- a/libffmpegthumbnailer/moviedecoder.cpp
+++ b/libffmpegthumbnailer/moviedecoder.cpp
@@ -408,3 +408,3 @@
     AVFilterContext* yadifFilter = nullptr;
-    if (m_pFrame->interlaced_frame != 0)
+    if (m_pFrame->flags & AV_FRAME_FLAG_INTERLACED)
     {
@@ -520,3 +520,3 @@
         ++keyFrameAttempts;
-    } while ((!gotFrame || !m_pFrame->key_frame) && keyFrameAttempts < 200);
+    } while ((!gotFrame || !(m_pFrame->flags & AV_FRAME_FLAG_KEY)) && keyFrameAttempts < 200); 
 
@@ -657,16 +657,23 @@
 {
-    auto matrix = reinterpret_cast<int32_t*>(av_stream_get_side_data(m_pVideoStream, AV_PKT_DATA_DISPLAYMATRIX, nullptr));
-    if (matrix)
-    {
+    if (!m_pVideoStream || !m_pVideoStream->codecpar) {
+        return -1;
+    }
+
+    // For FFmpeg 5.0+
+    const AVPacketSideData* side_data = av_packet_side_data_get(
+        m_pVideoStream->codecpar->coded_side_data,
+        m_pVideoStream->codecpar->nb_coded_side_data,
+        AV_PKT_DATA_DISPLAYMATRIX
+    );
+
+    if (side_data && side_data->size >= sizeof(int32_t) * 9) {
+        const int32_t* matrix = reinterpret_cast<const int32_t*>(side_data->data);
         auto angle = lround(av_display_rotation_get(matrix));
-        if (angle < -135)
-        {
+        if (angle < -135) {
             return 3;
         }
-        else if (angle > 45 && angle < 135)
-        {
+        else if (angle > 45 && angle < 135) {
             return 2;
         }
-        else if (angle < -45 && angle > -135)
-        {
+        else if (angle < -45 && angle > -135) {
             return 1;