How to include internal thubnails in .nfo

Good day! I'm trying to write my own paser of mp4 tags in video file to construct metadata in .nfo format. This is example of such file:

  Code:

<movie>
        <title>Masaki</title>
        <genre>Animation</genre>
        <year>2008</year>
        <thumb>masaki.jpg</thumb>
        <fileinfo>
            <streamdetails>
                <video>
                    <codec>h264</codec>
                    <aspect>2.35</aspect>
                    <width>1920</width>
                    <height>816</height>
                </video>
                <audio>
                    <codec>ac3</codec>
                    <language>eng</language>
                    <channels>6</channels>
                </audio>
                <audio>
                    <codec>ac3</codec>
                    <language>jap</language>
                   <channels>2</channels>
                </audio>
                <subtitle>
                    <language>spa</language>
                </subtitle>
            </streamdetails>
        </fileinfo>
        <actor>
            <name>Masaki</name>
            <role>Himself</role>
        </actor>
</movie>

But thubnails did not pass to dlna "client" xbmc from serviio server. Is it wrong to write tag:
<thumb>masaki.jpg</thumb>
with a file placed in the same directory. Should I use hyperlink only in "tumb" tag or it is possible to point out local file? Or the tag "thumb" is simply ignored by Serviio?

[zip]

No need to place anything in the .nfo, just create an image file in the same folder as per http://serviio.org/index.php?option=com ... icle&id=12 (Local poster)

Shame on me. Thx for the tip. Also it is required to drop Retrieve DVD cover image or poster if available option in Serviio console.

[zip]

It should not, the local file should always take priority over online images.