When B frames >= 1, there'll be a invalid dts/pts warning during
encoding like:
[mp4 @ 000000000034cba0] Invalid DTS: 1024 PTS: 512 in output stream
0:0, replacing by guess
[mp4 @ 000000000034cba0] Invalid DTS: 1536 PTS: 1024 in output stream
0:0, replacing by guess
Set a -1 offset to dts to prevent dts>pts case.
From: agathah <a...@nvidia.com>
---
libavcodec/nvenc.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/libavcodec/nvenc.c b/libavcodec/nvenc.c
index 345fb78..19a3ec8 100644
--- a/libavcodec/nvenc.c
+++ b/libavcodec/nvenc.c
@@ -657,9 +657,14 @@ static av_cold int nvenc_encode_init(AVCodecContext
*avctx)
}
if (ctx->gobpattern >= 0) {
- ctx->encode_config.frameIntervalP = 1;
+ ctx->encode_config.frameIntervalP = ctx->gobpattern;
}
+ // when there're b frames, set dts offset
+ if (ctx->encode_config.frameIntervalP >= 2) {
+ ctx->last_dts = -2;
+ }
+
ctx->encode_config.encodeCodecConfig.h264Config.h264VUIParameters.colourDescriptionPresentFlag
= 1;
ctx->encode_config.encodeCodecConfig.h264Config.h264VUIParameters.videoSignalTypePresentFlag
= 1;
@@ -905,6 +910,10 @@ static int process_output_surface(AVCodecContext
*avctx, AVPacket *pkt, AVFrame
pkt->pts = lock_params.outputTimeStamp;
pkt->dts = timestamp_queue_dequeue(&ctx->timestamp_list);
+ // when there're b frame(s), set dts offset
+ if (ctx->encode_config.frameIntervalP >= 2)
+ pkt->dts -= 1;
+
if (pkt->dts > pkt->pts)
pkt->dts = pkt->pts;
--
1.9.5.github.0
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