[gst-devel] Firewire cameras with DirectShow

Fri Jun 26 15:59:00 CEST 2009

oh there is ffdemux_dv to demux systemstream=true.

So you can try:

gst-launch-0.10.exe dshowvideosrc ! "video/x-dv, systemstream=true,
width=640, height=480, framerate=10" ! ffdemux_dv ! ffmpegcolorspace !
directdrawsink

Julien

2009/6/26 Julien Isorce <julien.isorce at gmail.com>

> First I do not understand why you get a difference bettween
> systemstream=true and systemstream=1
> it should be the same thing.
>
> ****Can someone else help us on this exact question:
> If a propriety is a boolean, then set it to 1 or True, is the same thing ?
>
> Forgot this problem then we will use true and false, instead of 0 and 1.
> Sorry for waste of time.
> Well if I resume:
>
> gst-launch-0.10.exe dshowvideosrc ! "video/x-dv, systemstream=true,
> width=640, height=480, framerate=10" ! fakesink
> works fine (goes to playing state without crash) except the two warnings.
>
> Then gst-inspect-0.10 ffdec_dvvideo shows that ffdec_dvvideo only accepts
> systemstream=false.
>
> ***Can someone else help us on this other question:
> Does gstreamer have a decoder for "video/x-dv, systemstream=true" ? Does it
> make sense ?
>
> Phil, can you tell me if
> gst-launch-0.10.exe dshowvideosrc ! "video/x-dv, systemstream=false,
> width=640, height=480, framerate=10" ! fakesink
> leads to the same result as true ?
>
> About the screenshot. I can see that only the pin00 can be handled by
> dshowvideosrc because it's
> MEDIATYPE_Video and MEDIASUBTYPE_dvsd
> but unfortunatelly grapedit does not tell us if it's FORMAT_DvInfo (case
> systemstream=true)
> or FORMAT_VideoInfo (case systemstream=false)
> About the warnings, do not care about it, it seems that
> granularityVideoWidth/Height are not set by your camera driver.
> Or has no sense in case of systemstream=true.
>
> Anyway, for now I just do not know how to decode or render a video/x-dv,
> systemstream=true.
> I am sure someone else knows ?
>
> Julien
>
>
>
>
> 2009/6/26 Phil Rendell <philrendell at gmail.com>
>
>>
>> 2009/6/26 Julien Isorce <julien.isorce at gmail.com>
>>
>>>
>>> 2009/6/26 Phil Rendell <philrendell at gmail.com>
>>>>
>>>>
>>>> Sorry, no joy with this. Both complained about an erroneous pipeline. I
>>>> don't think this could be the same error as before with feeding
>>>> dshowvideosrc into ffmpegcolorspace, as if I remover the systemstream
>>>> property, or set it to either true or false, gst-launch crashes. Setting it
>>>> to anything else appears to cause the erroneous pipeline error.
>>>>
>>>>  D:\Camera\Common\GStreamer\bin>gst-launch-0.10.exe -v dshowvideosrc !
>>>> "video/x-dv, systemstream=0" ! fakesink
>>>> WARNING: erroneous pipeline: could not link dshowvideosrc0 to fakesink0
>>>> D:\Camera\Common\GStreamer\bin>gst-launch-0.10.exe -v dshowvideosrc !
>>>> "video/x-dv, systemstream=1" ! fakesink
>>>> WARNING: erroneous pipeline: could not link dshowvideosrc0 to fakesink0
>>>> D:\Camera\Common\GStreamer\bin>gst-launch-0.10.exe -v dshowvideosrc !
>>>> "video/x-dv, systemstream=2" ! fakesink
>>>> WARNING: erroneous pipeline: could not link dshowvideosrc0 to fakesink0
>>>> D:\Camera\Common\GStreamer\bin>gst-launch-0.10.exe -v dshowvideosrc !
>>>> fakesink
>>>> Setting pipeline to PAUSED ...
>>>> <Crash>
>>>> D:\Camera\Common\GStreamer\bin>
>>>>
>>>
>>> I am not sure t follow you. You said "as if I remover the systemstream
>>> property, or set it to either true or false"
>>> but you got a link error with "video/x-dv, systemstream=1". Then a crash
>>> ?
>>>
>>
>> Sorry, I probably should have laid that out clearer. I actually executed 4
>> commands there - one for systemstream=0, one for systemstream=1, one for
>> systemstream=2 and the other as before.
>>
>> If I do a gst-inspect on dshowvideosrc I can see that systemstream is set
>> to true in one case and false in another. No matter what I set it to I
>> always got a crash. However, now when I execute 'gst-launch dshowvideosrc !
>> "video/x-dv, systemstream=true" ! fakesink' I get a lot of console output,
>> which I assume means everything works fine. I'm really not sure what I'm
>> doing differently now though.
>>
>> D:\Camera\Common\GStreamer\bin>gst-launch-0.10.exe -v dshowvideosrc !
>>>> "video/x-dv, format=dvsd, width=640, height=480, framerate=10" ! fakesink
>>>> Setting pipeline to PAUSED ...
>>>> ** (gst-launch-0.10:2448): WARNING **: your desired video size is not
>>>> valid : 640 mod 1244160 !=0
>>>>
>>>> ** (gst-launch-0.10:2448): WARNING **: your desired video size is not
>>>> valid : 480 mod 1577311108 !=0
>>>> <Crash>
>>>>
>>>
>>> Could you try to add systemstream property as following:
>>>
>>> gst-launch-0.10.exe -v dshowvideosrc ! "video/x-dv, format=dvsd,
>>> width=640, height=480, framerate=10, systemstream=1" ! fakesink
>>> and
>>> gst-launch-0.10.exe -v dshowvideosrc ! "video/x-dv, format=dvsd,
>>> width=640, height=480, framerate=10, systemstream=0" ! fakesink
>>>
>>
>> I think my attempts at experimenting are a little bit of a red herring.
>> gst-launch crashes whenever I pass in the format argument. If  I run
>> gst-launch without this property set I still get the warning about the
>> desired video size being invalid and the same type of console output I
>> experienced just setting the caps to "video/x-dv, systemstream=true":
>>
>> D:\Camera\Common\GStreamer\bin>gst-launch-0.10.exe -v dshowvideosrc !
>> "video/x-dv, systemstream=true, width=640, height=480, framerate=10" !
>> fakesink
>> Setting pipeline to PAUSED ...
>>
>> ** (gst-launch-0.10:3556): WARNING **: your desired video size is not
>> valid : 640 mod 1244160 !=0
>>
>> ** (gst-launch-0.10:3556): WARNING **: your desired video size is not
>> valid : 480 mod 1577311108 !=0
>>
>> /GstPipeline:pipeline0/GstDshowVideoSrc:dshowvideosrc0.GstPad:src: caps =
>> video/x-dv, systemstream=(boolean)true, width=(int)640, height=(int)480,
>> framerate=(int)10
>> Pipeline is live and does not need PREROLL ...
>> Setting pipeline to PLAYING ...
>> New clock: GstSystemClock
>> /GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps =
>> video/x-dv, systemstream=(boolean)true, width=(int)640, height=(int)480,
>> framerate=(int)10
>> /GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:sink: caps =
>> video/x-dv, systemstream=(boolean)true, width=(int)640, height=(int)480,
>> framerate=(int)10
>> /GstPipeline:pipeline0/GstFakeSink:fakesink0.GstPad:sink: caps =
>> video/x-dv, systemstream=(boolean)true, width=(int)640, height=(int)480,
>> framerate=(int)10
>> /GstPipeline:pipeline0/GstFakeSink:fakesink0: last-message = "preroll
>> *******"
>> /GstPipeline:pipeline0/GstFakeSink:fakesink0: last-message = "event
>> ******* E(type: 102, GstEventNewsegment, update=(boolean)false,
>> rate=(double)1, applied-rate=(double)1, format=(GstFormat)GST_FORMAT_BYTES,
>> start=(gint64)0, stop=(gint64)-1, position=(gint64)0;) 013379C0"
>> /GstPipeline:pipeline0/GstFakeSink:fakesink0: last-message = "chain
>> ******* <(144000 bytes, timestamp: 0:00:00.078125000, duration:
>> 0:00:00.040000000, offset: -1, offset_end: -1, flags: 32) 044D3320"
>> /GstPipeline:pipeline0/GstFakeSink:fakesink0: last-message = "chain
>> ******* <(144000 bytes, timestamp: 0:00:00.125000000, duration:
>> 0:00:00.040000000, offset: -1, offset_end: -1, flags: 0) 044D3378"
>> ...
>>
>> Again, it doesn't appear to work when I set systemstream to 0, 1, or 2,
>> only booleans.
>>
>> For some reason when I execute 'gst-launch dshowvideosrc ! "video/x-dv,
>> systemstream=true, width=640, height=480, framerate=10" ! ffdec_dvvideo !
>> directdrawsink' I get the link error saying that it cannot link
>> dshowvideosrc0 to ffdec_dvvideo0. Could this be something to do with the
>> format parameter being missing?
>>
>>
>>>
>>> The thing I know is that dshowvideosrc implementation goes in a wrong way
>>> in case of "video/x-dv, systemstream=1".
>>> I mean it uses FORMAT_VideoInfos fields while it should use FORMAT_DvInfo
>>> fields.
>>> Even if I have no dv camera I could try something but
>>> first I really have to know if it's systemstream=0 or 1.
>>>
>> You probably don't need it now, but I've attached a screenshot of the
>> filter dialog in graphedit, which might be able to tell you which
>> systemstream is being used.
>>
>> Thanks,
>>
>> Phil
>>
>>
>> ------------------------------------------------------------------------------
>>
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>> gstreamer-devel at lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>>
>>
>
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