From: Dimitry Ishenko <dimitry.ishenko@gmail.com>
Date: Wed, 2 Nov 2016 14:00:53 +0000 (-0400)
Subject: [ffmpeg_producer] Constrain SEEK values
X-Git-Tag: 2.1.0_Beta1~21^2
X-Git-Url: https://git.sesse.net/?p=casparcg;a=commitdiff_plain;h=1e205b0afe249d88a94d1ad47a412fff8733a26b

[ffmpeg_producer] Constrain SEEK values
---

diff --git a/modules/ffmpeg/producer/ffmpeg_producer.cpp b/modules/ffmpeg/producer/ffmpeg_producer.cpp
index 48facf644..fe0492ade 100644
--- a/modules/ffmpeg/producer/ffmpeg_producer.cpp
+++ b/modules/ffmpeg/producer/ffmpeg_producer.cpp
@@ -441,19 +441,21 @@ public:
 		}
 		else if(boost::regex_match(param, what, seek_exp))
 		{
-			auto value = boost::lexical_cast<uint32_t>(what["VALUE"].str());
+			auto value = boost::lexical_cast<int64_t>(what["VALUE"].str());
 			auto whence = what["WHENCE"].str();
+			auto total = file_nb_frames();
 
 			if(boost::iequals(whence, L"REL"))
-			{
 				value = file_frame_number() + value;
-			}
 			else if(boost::iequals(whence, L"END"))
-			{
-				value = file_nb_frames() - value;
-			}
+				value = total - value;
+
+			if(value < 0)
+				value = 0;
+			else if(value >= total)
+				value = total - 1;
 
-			input_.seek(value);
+			input_.seek(static_cast<uint32_t>(value));
 		}
 		else if(boost::regex_match(param, what, length_exp))
 		{