Use G_GUINT64_FORMAT for guint64 values. Introduced by fcb63e77a9de42cfb50da03a4925b06704006be3 Found by Alexander Larsson gstvideodecoder.c: In function 'gst_video_decoder_have_frame': gstvideodecoder.c:3312:51: error: format '%u' expects argument of type 'unsigned int', but argument 8 has type 'guint64 {aka long long unsigned int}' [-Werror=format=]