looking for help creating a mime type

kendell clark coffeekingms at gmail.com
Mon Apr 11 07:09:32 UTC 2016

Ok, the bug has been filed at:
https://bugs.freedesktop.org/show_bug.cgi?id=94889. This provides
support for the audible audio format, but purely based on the file
extension. Next is to get support for this put into gstreamer. Where
should I start for that? I'm no programmer, but since the audible file
is a container with other audio inside of it it shouldn't be too hard.
Usually mp3, but occasionally the acelp or sony's HAC ((hearing aid
compatible) codecs are used, although I don't have any idea what those
last two are.
Kendell Clark

Jerome Leclanche wrote:
> You can use the command line hex editor you probably already have
> installed. hexdump -C file.aa | less. There's plenty of gui ones too.
> A magic number isn't required (nor even necessarily available), the
> .aa extension isn't used by anything else I believe so you could just
> use that.
> J. Leclanche
> On Mon, Apr 11, 2016 at 9:09 AM, kendell clark <coffeekingms at gmail.com> wrote:
>> hi
>> Thank you very much for that link. I now have some of the bits I need to
>> create a fully functioning mime type. The one thing I'm missing is a way
>> of uniquely identifying audible audio files without relying on the file
>> extension. If I can't find this, creating a mime type will be pretty
>> easy, but I'd prefer to  be able to uniquely identify the file type if
>> possible. It's amusing. The audible website swears that you can't
>> convert their files into other formats, and yet I did so via ffmpeg.
>> What else should I do? I can't seem to find an accessible hex editor, so
>> if anyone is willing to help me out there by getting some form of magic
>> info, integer, string, etc that I can use to single out the audible
>> format I'd really appreciate it. Don't worry, I'm not asking anyone to
>> do all the work for me, I'm still going to file the bug and make sure
>> everything complies with the mime spec.
>> Thanks
>> Kendell Clark
>> Jerome Leclanche wrote:
>>> Your first step will be figuring out if there is any existing media
>>> type for this type of file.
>>> Looking at http://www.digitalpreservation.gov/formats/fdd/fdd000103.shtml#sign
>>> I see audio/audible
>>> audio/x-pn-audibleaudio, the latter which looks like it could be used in xdg.
>>> After that you'll want to file a bug on the freedesktop bugzilla
>>> (https://bugs.freedesktop.org/), and provide a patch if possible.
>>> There's other mime type requests on that bugzilla you can take example
>>> on.
>>> J. Leclanche
>>> On Mon, Apr 11, 2016 at 8:33 AM, kendell clark <coffeekingms at gmail.com> wrote:
>>>> hi all
>>>> After a lot of digging through my cd collection, I came across an
>>>> audible audio file I had backed up who knows how long ago. I've been
>>>> wanting to create fully functioning mime types for this and it's
>>>> enhanced audio counterpart for a while now. I'm a complete novice at
>>>> this, so I'm looking for any willing helpers. I can upload the files
>>>> somewhere so if anyone decides to help me they can have access to them.
>>>> Note that these are legal files, legally obtained from audible with an
>>>> active account, mine. Well, not active anymore, but it was when these
>>>> files were obtained. These seem to be mp3 files with some strange stuff
>>>> at the beginning, because simply renaming the file extension doesn't
>>>> allow them to be played, but I can easily convert them with ffmpeg. Any
>>>> help would be greatly appreciated.
>>>> Thanks
>>>> Kendell Clark
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