fix.patch

diff --git a/libavcodec/cuviddec.c b/libavcodec/cuviddec.c
index 2aecb45..671fc8c 100644
--- a/libavcodec/cuviddec.c
+++ b/libavcodec/cuviddec.c
@@ -77,6 +77,7 @@ typedef struct CuvidContext
     int deint_mode;
     int deint_mode_current;
     int64_t prev_pts;
+    unsigned char progressive_sequence;
 
     int internal_error;
     int decoder_flushing;
@@ -216,6 +217,8 @@ static int CUDAAPI cuvid_handle_video_sequence(void *opaque, CUVIDEOFORMAT* form
                               ? cudaVideoDeinterlaceMode_Weave
                               : ctx->deint_mode;
 
+    ctx->progressive_sequence = format->progressive_sequence;
+
     if (!format->progressive_sequence && ctx->deint_mode_current == cudaVideoDeinterlaceMode_Weave)
         avctx->flags |= AV_CODEC_FLAG_INTERLACED_DCT;
     else
@@ -509,6 +512,8 @@ static int cuvid_output_frame(AVCodecContext *avctx, AVFrame *frame)
 
         av_fifo_generic_read(ctx->frame_queue, &parsed_frame, sizeof(CuvidParsedFrame), NULL);
 
+        parsed_frame.dispinfo.progressive_frame = ctx->progressive_sequence;
+
         memset(&params, 0, sizeof(params));
         params.progressive_frame = parsed_frame.dispinfo.progressive_frame;
         params.second_field = parsed_frame.second_field;