From a8b1d152a4b5eb9912658fd438f3465a836a2cf4 Mon Sep 17 00:00:00 2001
From: lucabe <lucabe@9553f0bf-9b14-0410-a0b8-cfaf0461ba5b>
Date: Tue, 21 Oct 2008 07:59:41 +0000
Subject: [PATCH] The v4l2 driver can silently change the pixel format in the
 VIDIOC_S_FMT ioctl(). In this case, device_init() should fail so that a
 different pixel format is tried. Patch by Jens Rosenboom (jens DOT rosenboom
 AT eu DOT panasonic DOT com)

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@15660 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b
---
 libavdevice/v4l2.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c
index 699a982ac..d8d58f06b 100644
--- a/libavdevice/v4l2.c
+++ b/libavdevice/v4l2.c
@@ -193,6 +193,11 @@ static int device_init(AVFormatContext *ctx, int *width, int *height, int pix_fm
         *height = fmt.fmt.pix.height;
     }
 
+    if (pix_fmt != fmt.fmt.pix.pixelformat) {
+        av_log(ctx, AV_LOG_DEBUG, "The V4L2 driver changed the pixel format from 0x%08X to 0x%08X\n", pix_fmt, fmt.fmt.pix.pixelformat);
+        res = -1;
+    }
+
     return res;
 }
 
-- 
2.11.4.GIT