Change location of filesrc dinamically

[Lautaro Woites]

Ok, discarding both the old filesrc and decoder, creating the new ones and
linking them to the pipeline, works ok.

My next step was adding a timeoverlay to the pipeline, the problems I
encountered were:

1) When I changed the video source, the displayed time by timeoverlay jumps
up to the end of the current video time
 ( display_time = display_time + lenght_of_current_video).

Regardless of the display time issue. The pipeline the form I builded is a
valid one?
Am I doing something wrong?

2) I could not control the precise time for change  the video source.
For example, change the video source after 10 seconds from the first video.
This is possible?

Thanks in advance


2013/3/5 Lautaro Woites <lauchapc87 at gmail.com>

> Thanks Wim.
>
> I will try to add a videomixer to the pipeline removing the old source and
> adding the new one.
> What do you think?
>
>
>
> 2013/3/5 Wim Taymans <wim.taymans at gmail.com>
>
>> On 03/05/2013 04:24 PM, Lautaro Woites wrote:
>>
>>> Hi all,
>>>
>>> I am new to gstreamer and I writing a gstreamer app (0.10.35) on python.
>>> My app shows a video on the screen using the next pipeline:
>>>
>>> filesrc ! decodebin2 ! queue2 ! videoscale ! capsfilter
>>> caps="video/x-raw-yuv height=640, width=480" !
>>>
>>> The decoder and the queue are linked dinamically using the "pad-added"
>>> signal.
>>>
>>> I tryed to change the location property on the filesrc but is not
>>> possible.
>>> Also I tryed to use a multifilesrc and change the location property but
>>> didn't work.
>>>
>>> Now I'm trying to create and link a new filesrc. This are the steps I'm
>>> following:
>>>
>>>     1) set the STATE of the old filesrc to NULL
>>>     2) create a new filesrc and set the new location to it.
>>>     3) unlink the old filesrc with the decoder
>>>     4) unlink the decoder with the queue
>>>     5) link the new filesrc with the decoder
>>>     6) set the STATE of the new filesrc to PLAYING
>>>
>>> This didn't work. The decoder "pad-added" callback is not called and the
>>> pipeline is paused because a not-linked error on the old filsesrc
>>>
>>> My questions are:
>>> 1) How Can unlink the old filesrc and link the new one dinamically?
>>>
>> You can't do that in general.
>>
>>
>>  2) What are the best approach to change the video source location?
>>>
>> You make a new pipeline with the new video source location and then
>> mix/swap it in like before your
>> videoscale or so.
>>
>> wim
>>
>>>
>>>
>>>
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