Hi!
Attached untested patch tries to limit the effects of setting a high
bitrate for qsv.
Works around ticket #7663.
Please comment, Carl Eugen
From 9c51b260a0c65fe7fbf18ac5235f3336be66502c Mon Sep 17 00:00:00 2001
From: Carl Eugen Hoyos <ceffm...@gmail.com>
Date: Thu, 10 Jan 2019 21:50:04 +0100
Subject: [PATCH] lavc/qsvenc: Clip the bitrate, Intel limits it to 65535k.
Work-around for ticket #7663.
---
libavcodec/qsvenc.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c
index e3b5a72..e7083eb 100644
--- a/libavcodec/qsvenc.c
+++ b/libavcodec/qsvenc.c
@@ -558,10 +558,10 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q)
#if QSV_HAVE_VCM
case MFX_RATECONTROL_VCM:
#endif
- q->param.mfx.BufferSizeInKB = avctx->rc_buffer_size / 8000;
- q->param.mfx.InitialDelayInKB = avctx->rc_initial_buffer_occupancy / 1000;
- q->param.mfx.TargetKbps = avctx->bit_rate / 1000;
- q->param.mfx.MaxKbps = avctx->rc_max_rate / 1000;
+ q->param.mfx.BufferSizeInKB = FFMIN(UINT16_MAX, avctx->rc_buffer_size / 8000);
+ q->param.mfx.InitialDelayInKB = FFMIN(UINT16_MAX, avctx->rc_initial_buffer_occupancy / 1000);
+ q->param.mfx.TargetKbps = FFMIN(UINT16_MAX, avctx->bit_rate / 1000);
+ q->param.mfx.MaxKbps = FFMIN(UINT16_MAX, avctx->rc_max_rate / 1000);
break;
case MFX_RATECONTROL_CQP:
quant = avctx->global_quality / FF_QP2LAMBDA;
--
1.7.10.4
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