From 432fe9a38afca9104c1c11942d21739e2a48ba96 Mon Sep 17 00:00:00 2001
From: Matthieu Bouron <matthieu.bouron@gmail.com>
Date: Fri, 4 May 2012 15:40:34 +0200
Subject: [PATCH] ffmpeg: fix a crash with complex filters when pix_fmt is not
 specified

ffmpeg -i in.mxf -filter_complex "[0:0]fieldorder=tff" out.wav will
fail with an error message instead of crashing.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 ffmpeg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ffmpeg.c b/ffmpeg.c
index 7690e43cf7..8f3ffb5de6 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -713,7 +713,7 @@ static char *choose_pix_fmts(OutputStream *ost)
     }
     if (ost->st->codec->pix_fmt != PIX_FMT_NONE) {
         return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc, ost->st->codec->pix_fmt)));
-    } else if (ost->enc->pix_fmts) {
+    } else if (ost->enc && ost->enc->pix_fmts) {
         const enum PixelFormat *p;
         AVIOContext *s = NULL;
         uint8_t *ret;