From 808356c61c6ed05467d4351b12dd34938705cd65 Mon Sep 17 00:00:00 2001
From: Timo Rothenpieler <timo@rothenpieler.org>
Date: Mon, 6 Jun 2016 21:19:29 +0200
Subject: [PATCH] avcodec/nvenc: Check capabilities for interlaced encoding

---
 libavcodec/nvenc.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libavcodec/nvenc.c b/libavcodec/nvenc.c
index d3115f4141..ae1612ff2a 100644
--- a/libavcodec/nvenc.c
+++ b/libavcodec/nvenc.c
@@ -306,6 +306,14 @@ static int nvenc_check_capabilities(AVCodecContext *avctx)
         return AVERROR(ENOSYS);
     }
 
+    ret = nvenc_check_cap(avctx, NV_ENC_CAPS_SUPPORT_FIELD_ENCODING);
+    if (ret < 1 && avctx->flags & AV_CODEC_FLAG_INTERLACED_DCT) {
+        av_log(avctx, AV_LOG_VERBOSE,
+               "Interlaced encoding is not supported. Supported level: %d\n",
+               ret);
+        return AVERROR(ENOSYS);
+    }
+
     return 0;
 }