--- gmic-1.5.2.2/src/CImg.h
+++ gmic-1.5.2.2/src/CImg.h
@@ -318,6 +318,7 @@
 extern "C" {
 #include "avformat.h"
 #include "avcodec.h"
+#include "libavutil/mathematics.h"
 #include "swscale.h"
 }
 #endif
@@ -44795,7 +44796,11 @@
         AVPacket pkt;
         int got_packet;
         av_init_packet(&pkt);
+#if LIBAVCODEC_VERSION_INT<AV_VERSION_INT(54,1,0)
+        out_size = avcodec_encode_video(c,video_outbuf,video_outbuf_size,picture);
+#else
         out_size = avcodec_encode_video2(c,&pkt,picture,&got_packet);
+#endif
         if (got_packet) {
           pkt.pts = av_rescale_q(c->coded_frame->pts,c->time_base,video_str->time_base);
           if (c->coded_frame->key_frame) pkt.flags|=AV_PKT_FLAG_KEY;