Making flvtool++ work with large files

The flvtool++ by Facebook is a fast FLV metadata tagger, but at least up to v1.2.1 it lacks large file support. Here is a simple patch to make it work with large files:

--- flvtool++.orig/fout.h	2009-06-19 05:06:47.000000000 +0200
+++ flvtool++/fout.h	2010-10-12 15:51:37.000000000 +0200
@@ -21,7 +21,7 @@
   void open(const char* fn) {
     if (fp) this->close();
 
-    fp = fopen(fn, "wb");
+    fp = fopen64(fn, "wb");
     if (fp == NULL) {
       char errbuf[256];
       snprintf(errbuf, 255, "Error opening output file \"%s\": %s", fn, strerror(errno));

--- flvtool++.orig/mmfile.h	2009-06-19 05:29:43.000000000 +0200
+++ flvtool++/mmfile.h	2010-10-12 15:46:00.000000000 +0200
@@ -16,7 +16,7 @@
 public:
   mmfile() : fd(-1) {} 
   mmfile(char* fn) {
-    fd = open(fn, O_RDONLY);
+    fd = open(fn, O_RDONLY | O_LARGEFILE);
     if (fd == -1) throw std::runtime_error(string("mmfile: unable to open file ") + string(fn));
     struct stat statbuf;
     fstat(fd, &statbuf);

Note: While this patch helps you to process large files flvtool++ will still load the entire file into memory!!! Given this you might want to use a different injector like yamdi. For a comparsion of existing tools have a look at the Comparison of FLV and MP4 metadata tagging tools.