From 636cb15f3df9b9e444dbc61c533232ac3fc6b4a3 Mon Sep 17 00:00:00 2001
From: Vadim Pisarevsky <no@email>
Date: Mon, 22 Nov 2010 13:07:43 +0000
Subject: [PATCH] add protection against EAGAIN error in the streams (thanks to
 vrabaud for the patch - ticket #553)

---
 modules/highgui/src/cap_ffmpeg.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/modules/highgui/src/cap_ffmpeg.cpp b/modules/highgui/src/cap_ffmpeg.cpp
index def8eb51ae..ee59ae14a3 100644
--- a/modules/highgui/src/cap_ffmpeg.cpp
+++ b/modules/highgui/src/cap_ffmpeg.cpp
@@ -538,7 +538,13 @@ bool CvCapture_FFMPEG::grabFrame()
     }
 
     // get the next frame
-    while (!valid && (av_read_frame(ic, &packet) >= 0)) {
+    while (!valid) {
+        int ret = av_read_frame(ic, &packet);
+        if (ret == AVERROR(EAGAIN))
+            continue;
+        if (ret < 0)
+            break;
+        
 		if( packet.stream_index != video_stream ) {
 		        av_free_packet (&packet);
 		        continue;