ffserver: Use singlejpeg muxer for jpeg

Fixes Ticket4218

Based on patch by: Otávio Ribeiro
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

ffserver.c

@@ -967,6 +967,10 @@ static int handle_connection(HTTPContext *c)
         /* close connection if trailer sent */
         if (c->state == HTTPSTATE_SEND_DATA_TRAILER)
             return -1;
+        /* Check if it is a single jpeg frame 123 */
+        if (c->stream->single_frame && c->data_count > c->cur_frame_bytes && c->cur_frame_bytes > 0) {
+            close_connection(c);
+        }
         break;
     case HTTPSTATE_RECEIVE_DATA:
         /* no need to read if no events */

ffserver_config.c

@@ -862,8 +862,10 @@ static int ffserver_parse_config_stream(FFServerConfig *config, const char *cmd,
         } else {
             stream->stream_type = STREAM_TYPE_LIVE;
             /* JPEG cannot be used here, so use single frame MJPEG */
-            if (!strcmp(arg, "jpeg"))
-                strcpy(arg, "mjpeg");
+            if (!strcmp(arg, "jpeg")) {
+                strcpy(arg, "singlejpeg");
+                stream->single_frame=1;
+            }
             stream->fmt = ffserver_guess_format(arg, NULL, NULL);
             if (!stream->fmt)
                 ERROR("Unknown Format: '%s'\n", arg);

ffserver_config.h

@@ -79,6 +79,7 @@ typedef struct FFServerStream {
     int multicast_port;           /* first port used for multicast */
     int multicast_ttl;
     int loop;                     /* if true, send the stream in loops (only meaningful if file) */
+    char single_frame;            /* only single frame */
 
     /* feed specific */
     int feed_opened;              /* true if someone is writing to the feed */