There are 2 types of problems when using adaptive deinterlace with cuvid:
1. Sometimes, in the middle of transcoding, cuvid outputs frames with visible horizontal lines (as though weave deinterlace method was chosen);
2. Occasionally, on scene changes, cuvid outputs a wrong frame, which should have been shown several seconds before (as if the frame was assigned some wrong PTS value).
The reason is that sometimes CUVIDPARSERDISPINFO has property progressive_frame equal to 1 with interlaced videos.
In order to fix the problem we should check if the video is interlaced or progressive in the beginning of a video sequence (cuvid_handle_video_sequence).
And then we just use this information instead of the property progressive_frame in CUVIDPARSERDISPINFO (which is unreliable).
Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>
int deint_mode;
int deint_mode_current;
int64_t prev_pts;
+ int progressive_sequence;
int internal_error;
int decoder_flushing;
? 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
parsed_frame.dispinfo = *dispinfo;
ctx->internal_error = 0;
+ // For some reason, dispinfo->progressive_frame is sometimes wrong.
+ parsed_frame.dispinfo.progressive_frame = ctx->progressive_sequence;
+
if (ctx->deint_mode_current == cudaVideoDeinterlaceMode_Weave) {
av_fifo_generic_write(ctx->frame_queue, &parsed_frame, sizeof(CuvidParsedFrame), NULL);
} else {