avconv: do not set encoder options when streamcopy is used

avconv.c

@@ -1735,10 +1735,6 @@ static int init_output_stream(OutputStream *ost, char *error, int error_len)
 
         ost->st->time_base = ost->enc_ctx->time_base;
     } else if (ost->stream_copy) {
-        ret = av_opt_set_dict(ost->enc_ctx, &ost->encoder_opts);
-        if (ret < 0)
-            return ret;
-
         /*
          * FIXME: will the codec context used by the parser during streamcopy
          * This should go away with the new parser API.