Don't copy more then needed, bugfix by Gus Scheidt ellocogato at gmail dot com...

Don't copy more then needed, bugfix by Gus Scheidt ellocogato at gmail dot com and Michel Bardiaux mbardiaux at mediaxim dot be.

Originally committed as revision 7702 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/flashsvenc.c

@@ -242,7 +242,7 @@ static int flashsv_encode_frame(AVCodecContext *avctx, uint8_t *buf, int buf_siz
     *p = *pict;
 
     if (s->first_frame) {
-        s->previous_frame = av_mallocz(p->linesize[0]*s->image_height*3);
+        s->previous_frame = av_mallocz(p->linesize[0]*s->image_height);
         if (!s->previous_frame) {
             av_log(avctx, AV_LOG_ERROR, "Memory allocation failed.\n");
             return -1;
@@ -295,7 +295,7 @@ static int flashsv_encode_frame(AVCodecContext *avctx, uint8_t *buf, int buf_siz
     res = encode_bitstream(s, p, buf, buf_size, opt_w*16, opt_h*16, s->previous_frame, &I_frame);
 #endif
     //save the current frame
-    memcpy(s->previous_frame, p->data[0], s->image_height*p->linesize[0]*3);
+    memcpy(s->previous_frame, p->data[0], s->image_height*p->linesize[0]);
 
     //mark the frame type so the muxer can mux it correctly
     if (I_frame) {