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Slow video streaming (ex. YouTube.com)

Hi there,

For some reason ever since installing Sophos Anti-Virus, everytime I try to access a youtube video there is a long delay before the video starts. I assume it's scanning something, and if I disable Sophos entirely the video will stream just fine without delay.

Unfortunately I can't find the setting to disable scanning of streaming videos online, can anybody assist? Has anyone been able to do that?

Thanks

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0 jak over 14 years ago

Hi,

I assume you are using Internet Explorer to view YouTube?

The Browser Helper Object (BHO) which implements the web scanning feature in IE and appears as "Sophos Web Content Scanner" in "Manage add-ons", buffers 2 MB of data, this is the delay you are seeing. To prove this, in the config file factory.xml there is the following configuration:

                       <settings>
                            <mode>asOnAccess</mode>
                            <urlWhiteList/>
                            <mimeTypeList>
                                <item>text/html</item>
                                <item>text/javascript</item>
                                <item>text/emcascript</item>
                                <item>text/vbscript</item>
                                <item>audio/unknown</item>
                                <item>image/*</item>
                                <item>video/*</item>
                                <item>application/octet-stream</item>
                                <item>application/javascript</item>
                                <item>application/x-javascript</item>
                                <item>application/emcascript</item>
                                <item>application/vbscript</item>
                                <item>application/xhtml</item>
                                <item>application/x-msdos-program</item>
                                <item>application/x-msdownload</item>
                                <item>application/x-zip-compressed</item>
                                <item>application/vnd.ms-htmlhelp</item>
                                <item>application/x-msmetafile</item>                                
                                <item>application/zip</item>
                            </mimeTypeList>
                            <contentSizeLimit>2048</contentSizeLimit>
                            <zoneList>
                                <item>0</item>  <!-- local machine -->
                                <item>1</item>  <!-- intranet -->
                            </zoneList>
                        </settings>

Note the 2048 value.

Options you have are as follows:

1. Disable the BHO in Internet Explorer under "Manage add-ons".

2. Use a browser other than IE to view YouTube. E.g. Chrome, Firefox, Opera, etc...

3. Add YouTube.com to the Intranet Zome within IE. You can see from the above config snippet that the BHO only scans by default the Internet and Trusted zone.
4. Stop the savservice, open the file factory.xml and change the number to maybe 1024 and see how that behaves once restarted.
5. Again in factory.xml change the MIME types that the BHO scans.

Note: 4 and 5 will be reset on the next major update.

All of the options will work, you'll have to decide which you think is the most acceptable to you :).

I hope that helps.

Regards,

Jak

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