[gst-devel] Switching between videos with input-selector

[victor héry]

  Thank you for your answer.

I didn't know about autovideosink working only with raw video. I used 
h264enc because the final aim is to stream with H264pay and udp staff.
For the test I have tried to drop h264enc from the pipeline according to 
your suggestion, but It seems not to change anything...

I have already tried decodebin before using playbin, but I had a problem 
with python, it said "failed to link decodebin and inputselector". I 
have tried with other plugin, like ffmpegcolorspace, videoscale, .... 
between decodebin and inputselector and I have the same error.

Today I have tried uridecodebin like you said, but unfortunatelly I have 
the same problem that with decodebin. Though it works well with the 
command line : gst-launch-0.10 uridecodebin uri="file://..." ! 
input-selector ! autovideosink, without any problems.
So I think there is a thing to do in python (In C as well ?) to link 
decodebin or uridecodebin with other plugins, but I really don't know 
what. I found something about the "new-decoded-pad" signal with 
decodebin2 in a tutorial (example 6.2 here : 
http://pygstdocs.berlios.de/pygst-tutorial/capabilities.html), but it 
didn't work for me :s

Have you ever used decodebin other than with the command line ? I am 
interested to learn more about it, and/or about uridecodebin, since it 
seems to work better than playbin for what I plan.
I am searching information on the web as well, but without many results 
for the moment.

Thank you for your time

Victor Hery



Le 17/08/2010 20:36, Luciana Fujii Pontello a écrit :
> On Tue, 2010-08-17 at 10:41 +0300, victor héry wrote:
>> Hello
>>
>> I am trying to code an application with gst python, to allow switching
>> between different videos.
>> The final aim is to stream videos and switch between differents
>> qualities or bitrate, according to the bandwith.
>>
>> For the moment, I use a local display for the tests. I use 2 playbin2
>> plugin to play the video easily, and I use 2 bins, one for each playbin,
>> to make treatments on the video, such as videoscale and x264enc.
>> After that, I use a third bin where I put the inputselector to switch
>> between the two streams, and the output (local display here).
>  From what I understand, you are asking autovideosink to play an encoded
> stream. Autovideosink will accept only raw video. At least that's what
> xvimagesink and ximagesink accept.
>
> I'm not sure if input-selector can work with encoded video as well.
>
> If you want to display the video, drop the h264enc from your pipeline.
>
> And I don't know much about playbin2, but you probably want to drop
> playbin2 from your pipeline as well. Maybe what you need is uridecodebin
> or decodebin2.
>
> Regards,
>
> Luciana Fujii
>
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