[gst-devel] How to let cheese switch between video mode and photo mode without interupting video
ensonic at hora-obscura.de
Wed Nov 28 08:55:19 CET 2007
looked at the switch too and imho its not clearly names then. Filed:
Quoting Stefan Kost <ensonic at hora-obscura.de>:
> 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:
>>>> Jaap A. Haitsma schrieb:
>>>>> I guess some of you are familiar with the cheese webcam program 
>>>>> 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).
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