From: pabs3 <pabs3@1f10aa63-cdf2-0310-b900-c93c546f37ac>
Date: Thu, 6 Nov 2008 10:36:52 +0000 (+0000)
Subject: Speed up reverse seeking in the ffmpeg importer by using the ffmpeg -ss option to... 
X-Git-Url: https://git.pterodactylus.net/?a=commitdiff_plain;h=6fdd2872be2328044f27c700cef1e94f67cd255d;p=synfig.git

Speed up reverse seeking in the ffmpeg importer by using the ffmpeg -ss option to tell ffmpeg to seek to the right frame.

git-svn-id: https://synfig.svn.sourceforge.net/svnroot/synfig@2161 1f10aa63-cdf2-0310-b900-c93c546f37ac
---

diff --git a/synfig-core/trunk/src/modules/mod_ffmpeg/mptr_ffmpeg.cpp b/synfig-core/trunk/src/modules/mod_ffmpeg/mptr_ffmpeg.cpp
index b611d97..0ab514f 100644
--- a/synfig-core/trunk/src/modules/mod_ffmpeg/mptr_ffmpeg.cpp
+++ b/synfig-core/trunk/src/modules/mod_ffmpeg/mptr_ffmpeg.cpp
@@ -102,7 +102,7 @@ ffmpeg_mptr::seek_to(int frame)
 
 		string command;
 		
-		command=strprintf("ffmpeg -i \"%s\" -an -f image2pipe -vcodec ppm -\n",filename.c_str());
+		command=strprintf("ffmpeg -ss 00:00:00.%d -i \"%s\" -an -f image2pipe -vcodec ppm -\n",frame,filename.c_str());
 		
 		file=popen(command.c_str(),POPEN_BINARY_READ_TYPE);
 
@@ -133,7 +133,8 @@ ffmpeg_mptr::seek_to(int frame)
 			}
 			// Close the unneeded pipein
 			close(p[1]);
-			execlp("ffmpeg", "ffmpeg", "-i", filename.c_str(), "-an", "-f", "image2pipe", "-vcodec", "ppm", "-", (const char *)NULL);
+			string time = strprintf("00:00:00.%d",frame);
+			execlp("ffmpeg", "ffmpeg", "-ss", time.c_str(), "-i", filename.c_str(), "-an", "-f", "image2pipe", "-vcodec", "ppm", "-", (const char *)NULL);
 			// We should never reach here unless the exec failed
 			cerr<<"Unable to open pipe to ffmpeg"<<endl;
 			_exit(1);