fix #89, config to /dev/null to disable ffmpeg log. 0.9.117

@@ -228,6 +228,7 @@ Supported operating systems and hardware:
 * 2013-10-17, Created.<br/>
 
 ## History
+* v1.0, 2014-05-25, fix [#89](https://github.com/winlinvip/simple-rtmp-server/issues/89), config to /dev/null to disable ffmpeg log. 0.9.117
 * v1.0, 2014-05-25, fix [#76](https://github.com/winlinvip/simple-rtmp-server/issues/76), allow edge vhost to add or remove. 0.9.114
 * v1.0, 2014-05-24, Johnny contribute [ossrs.net](http://ossrs.net). karthikeyan start to translate wiki to English.
 * v1.0, 2014-05-22, fix [#78](https://github.com/winlinvip/simple-rtmp-server/issues/78), st joinable thread must be stop by other threads, 0.9.113

@@ -19,6 +19,7 @@ pid                 ./objs/srs.pid;
 chunk_size          60000;
 # the logs dir.
 # if enabled ffmpeg, each stracoding stream will create a log file.
+# /dev/null to disable the log.
 # default: ./objs
 ff_log_dir          ./objs;
 # the log tank, console or file.

@@ -2410,6 +2410,12 @@ string SrsConfig::get_log_file()
     return conf->arg0();
 }
 
+bool SrsConfig::get_ffmpeg_log_enabled()
+{
+    string log = get_ffmpeg_log_dir();
+    return log != "/dev/null";
+}
+
 string SrsConfig::get_ffmpeg_log_dir()
 {
     srs_assert(root);

@@ -253,6 +253,7 @@ public:
     virtual bool                get_log_tank_file();
     virtual std::string         get_log_level();
     virtual std::string         get_log_file();
+    virtual bool                get_ffmpeg_log_enabled();
     virtual std::string         get_ffmpeg_log_dir();
 // hls section
 private:

@@ -287,8 +287,9 @@ int SrsEncoder::initialize_ffmpeg(SrsFFMPEG* ffmpeg, SrsRequest* req, SrsConfDir
     output = srs_string_replace(output, "[stream]", req->stream);
     output = srs_string_replace(output, "[engine]", engine->arg0());
     
-    std::string log_file;
+    std::string log_file = "/dev/null"; // disabled
     // write ffmpeg info to log file.
+    if (_srs_config->get_ffmpeg_log_enabled()) {
         log_file = _srs_config->get_ffmpeg_log_dir();
         log_file += "/";
         log_file += "ffmpeg-encoder";
@@ -299,6 +300,7 @@ int SrsEncoder::initialize_ffmpeg(SrsFFMPEG* ffmpeg, SrsRequest* req, SrsConfDir
         log_file += "-";
         log_file += req->stream;
         log_file += ".log";
+    }
 
     // important: loop check, donot transcode again.
     std::vector<std::string>::iterator it;

@@ -262,8 +262,9 @@ int SrsIngester::initialize_ffmpeg(SrsFFMPEG* ffmpeg, SrsConfDirective* vhost, S
         app = app.substr(0, pos);
     }
     
-    std::string log_file;
+    std::string log_file = "/dev/null"; // disabled
     // write ffmpeg info to log file.
+    if (_srs_config->get_ffmpeg_log_enabled()) {
         log_file = _srs_config->get_ffmpeg_log_dir();
         log_file += "/";
         log_file += "ffmpeg-ingest";
@@ -274,6 +275,7 @@ int SrsIngester::initialize_ffmpeg(SrsFFMPEG* ffmpeg, SrsConfDirective* vhost, S
         log_file += "-";
         log_file += stream;
         log_file += ".log";
+    }
     
     // input
     std::string input_type = _srs_config->get_ingest_input_type(ingest);

@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR "0"
 #define VERSION_MINOR "9"
-#define VERSION_REVISION "116"
+#define VERSION_REVISION "117"
 #define RTMP_SIG_SRS_VERSION VERSION_MAJOR"."VERSION_MINOR"."VERSION_REVISION
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"