How to send media?

[strelov1]

I try send media

update, err := cli.mtproto.InvokeSync(mtproto.TL_messages_sendMedia{
	Silent:  false,
	Background:  false,
	Clear_draft:  false,
	Peer:  mtproto.TL_inputPeerChannel{
            Channel_id: channelTo.Id,
            Access_hash: channelTo.Access_hash},
	Reply_to_msg_id: 0,
	Media:         	 message.Media,
	Random_id:       rand.Int63(),
	Reply_markup:    mtproto.TL_null{},
})
if err != nil {
	fmt.Println(err)
	log.Fatal(err)
}
cli.parseUpdate(*update)

and recieve
INPUT_FETCH_ERROR

[bobrovde]

@strelov1 when i try to upload media by method messages.saveFilePart i got same error.
Solve it by change encode method for TL_upload_saveFilePart in api.go.
I change x.Bytes(e.Bytes) to x.StringBytes(e.Bytes)