[gst-devel] Firewire cameras with DirectShow

[Phil Rendell]

2009/6/29 Julien Isorce <julien.isorce at gmail.com>

>
> 2009/6/29 Phil Rendell <philrendell at gmail.com>
>>
>>>
>>> I also tried setting the lowres property of ffdec_dvvideo to 1/4 size to
>>> see if that would make a difference, but again, no luck, which leads me to
>>> believe that it's not a problem with decoding the stream.
>>
>>
>> Ok maybe ffdec_dv and ffdemux_dv are poor quality.
>>
>
> I have downloaded pond.dv   video sample file from
> http://libdv.sourceforge.net/
>
> Then:
>
> with lastest gstreamer git, on linux
>
> [fail] gst-launch-0.10 filesrc location=pond.dv ! ffdemux_dv !
> ffdec_dvvideo ! xvimagesink
> [fail] gst-launch-0.10 filesrc location=pond.dv ! dvdemux ! ffdec_dvideo !
> xvimagesink
> [fail] gst-launch-0.10 filesrc location=pond.dv ! ffdemux_dv ! dvdec !
> xvimagesink
> [success] gst-launch-0.10 filesrc location=pond.dv ! dvdemux ! dvdec !
> xvimagesink
> [success] ffplay pond.dv
>
> So "ffmpeg" can play it but "gst-ffmpeg" cannot.
>

Thanks for trying that - attempting the upgrade was next on my list.


 It's just a shame there's not a windows port of libdv, otherwise I could
>>> try building dvdemux. I don't know if there's anything else I could try?
>>
>>
>> You could ask libdv mailing list if someone has already tried to compile
>> or port libdv on win32.
>> You could try by your self to compile libdv using msys and mingw. (maybe
>> it's already ported)
>>
>> (http://libdv.sourceforge.net/)
>>
>
> It seems that libdv cannot be compiled with mingw:
> see: http://www.nabble.com/dv-support-on-windows-td20035798.html
>
> (note that there is a win32 port for pthread)
>

I might give this a try. This is probably going to be a massively
complicated and silly idea, but do you have any idea how complicated it
would be to create an extension of the dshowvideosrc plugin to include some
of the other elements in the DirectX pipeline? It's probably too difficult,
particularly as I'm not a DirectX expert, but I was wondering about doing
this being as I know that they work well in graphedit.

I'll try to have a look into how difficult it is to port libdv sometime
tomorrow.

Thanks,

Phil
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