[gst-devel] How to let cheese switch between video mode and photo mode without interupting video

[Stefan Kost]

Hi,

Jaap A. Haitsma schrieb:
> On Nov 19, 2007 9:05 PM, Jaap A. Haitsma <jaap at haitsma.org> wrote:
>> On Nov 19, 2007 8:56 PM, Stefan Kost <ensonic at hora-obscura.de> wrote:
>>> Hi,
>>>
>>> Jaap A. Haitsma schrieb:
>>>> Hi,
>>>>
>>>> I guess some of you are familiar with the cheese webcam program [1]
>>>> Cheese used to have two pipelines (one for taking a picture and one
>>>> for recording a video). We refactored that code and made one pipeline
>>>> to which we connect a photo_bin or video encoding bin to the pipeline
>>>> depending on if we are in video or photo mode.
>>>>
>>>> In order to do that we need to stop and start the pipeline. Therefore
>>>> the video is interupted
>>>>
>>>> So what we would like is have 2 pipelines running.
>>> What about running one pipeline with a switch element. I haven't used it yet
>>> myself. If that does not work using a tee and pad blocking could also work.
>>>
>> Thanks, I was looking for such a switch element. Probably because the
>> name is so logical I overlooked it :-(
>>
>> I'll give it a try
>>
> I tried it. switch is unfortunately not the element I was looking for.
> It switches inputs not outputs like I need. I tried the suggestion of
> blocking pads but if I block one element in one branch of the tee the
> other one also stops. See attached example:
> 
> The example use videotestsrc which is tee'd to two imagesinks by
> pressing the sink1 button you can block /unblock the first sink
> 
> However if the first sink gets blocked also the second one gets
> blocked. So that doesn't really help me. Is there anything I do wrong?
> Should I try something else?

Hmm, the queues should decouple it. Does it help if you make the queue leaky
(check the property).

Stefan

> 
> Thanks
> 
> Jaap
>