AVCHD Camcorder SD cards

Stefan Blachmann sblachmann at gmail.com
Fri Apr 1 22:59:10 UTC 2016

Hi Christopher,

the desktop managers or whatever are free to choose from the
applications that offer a particular mimetype. There is no
"standardized" OpenWith mechanism.
Thus it's quite random what app(s) from the available ones get opened.

This is a shortcoming of the standard. I don't see a way to escape it
except of generally offering an OpenWith dialog.

Hope this helps.

On 4/1/16, Christopher Hoskin <christopher.hoskin at gmail.com> wrote:
> Hello,
> I am interested in detecting when an SD card used in a camcorder is
> connected to a computer. There appears to be a convention (possibly a
> standard, but I don't have a reference?) that camcorders recording to the
> AVCHD format structure their file layout as shown here:
> https://en.wikipedia.org/wiki/File:AVCHD_actual_file_structure.jpg
> Currently this results in a Camcorder SD card being identified as
> 'x-content/image-dcf', which typically leads to the desktop environment
> automatically opening a photo editing application, rather than a video
> editing application.
> As a first draft, the entry might look something like this:
>   <mime-type type="x-content/camcorder-avchd">
>     <_comment>AVCHD Camcorder SD Card</_comment>
>     <treemagic>
>       <treematch path="PRIVATE/AVCHD/BDMV/STREAM" type="directory"
> non-empty="true"/>
>     </treemagic>
>   </mime-type>
> I am not an expert in this area, so this may need some refinement.
> I would be interested to know your thoughts on whether it would be
> appropriate to introduce such a MIME type?
> Thanks for your time.
> Christopher Hoskin

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