From 540b9826b3859e35a2df330a5912311843708e7c Mon Sep 17 00:00:00 2001 From: Timo Rothenpieler Date: Thu, 8 Dec 2022 12:31:00 +0100 Subject: [PATCH] avcodec/nvenc: fix vbv buffer size in cq mode The CQ calculation gets thrown off and behaves very nonsensical if it isn't set to 0. --- libavcodec/nvenc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libavcodec/nvenc.c b/libavcodec/nvenc.c index 03fdd70029..bea4b5538c 100644 --- a/libavcodec/nvenc.c +++ b/libavcodec/nvenc.c @@ -956,8 +956,9 @@ static av_cold void nvenc_setup_rate_control(AVCodecContext *avctx) av_log(avctx, AV_LOG_VERBOSE, "CQ(%d) mode enabled.\n", tmp_quality); - //CQ mode shall discard avg bitrate & honor max bitrate; + // CQ mode shall discard avg bitrate/vbv buffer size and honor only max bitrate ctx->encode_config.rcParams.averageBitRate = avctx->bit_rate = 0; + ctx->encode_config.rcParams.vbvBufferSize = avctx->rc_buffer_size = 0; ctx->encode_config.rcParams.maxBitRate = avctx->rc_max_rate; } }