callback "New-sample"

[Armin Erkert]

Hello,

thank you for the information.
I understand now that the qtmux is the problem, can you recommend me  
another MUX?

Regards Armin



Zitat von Matthew Waters via gstreamer-devel  
<gstreamer-devel at lists.freedesktop.org>:

> qtmux faststart=true will cause that to happen as it needs to write  
> the qt moov/etc header before any of the actual media data.  That's  
> how faststart is defined.
>
> qtmux into appsink is an unseekable resource (unless you've  
> overriden the seeking query) which would only work with some modes  
> of qtmux.
>
> If you are running GStreamer git master, then qtmux will write the  
> regular mode with a moov at the end after many mdat blocks when  
> provided with an unseekable downstream.
>
> Cheers
> -Matt
>
> On 14/9/21 4:02 pm, Armin Erkert via gstreamer-devel wrote:
>>
>>
>> Hello Michael,
>>
>> I have already set the "emit-signal" to true
>>
>> g_object_set (app->sink, "emit-signals", TRUE, NULL);
>> g_signal_connect (app->sink, "new-sample", G_CALLBACK (new_sample), app);
>>
>> but the callback "new-sample" is retrieved several 100th times only  
>> after I have pushed all images into the stream.
>>
>> Have now seen that in the \tmp\ a temporary file qtmuxXXXXX is  
>> created, and suspect that qtmux first caches everything ....
>>
>> Regards
>> Armin
>>
>>
>> Translated with www.DeepL.com/Translator (free version)
>>
>> Zitat von Michael Gruner via gstreamer-devel  
>> <gstreamer-devel at lists.freedesktop.org>:
>>
>>> Hello Armin
>>>
>>> You need to set the “emit-signals” property in the appsink to TRUE.
>>>
>>> Michael
>>> www.ridgerun.com
>>>
>>>> On 13 Sep 2021, at 14:19, Armin Erkert via gstreamer-devel  
>>>> <gstreamer-devel at lists.freedesktop.org> wrote:
>>>>
>>>> 
>>>> Hello,
>>>>
>>>> have problems with the following pipe
>>>> "appsrc is-live=true name=source  
>>>> caps=video/x-raw,width=2464,height=512,format=GRAY8,framerate=10/1 !  
>>>> nvvidconv ! video/x-raw(memory:NVMM),format=I420 ! nvv4l2h265enc  
>>>> iframeinterval=20 ! h265parse ! qtmux faststart=true ! appsink  
>>>> name=sink"
>>>>
>>>> which I use in my C++ program, and namely the callback  
>>>> "New-sample" from the appsink, is only called after an EOS in the  
>>>> appsrc
>>>> (g_signal_emit_by_name (app->source, "end-of-stream", &ret).
>>>>
>>>> How can I improve this ?
>>>>
>>>>
>>>> Regarda
>>>>
>>>> --------------------------------
>>>> Ing. Erkert Armin
>>>> Mittelstrich 9
>>>> I-39050 Tiers (BZ)
>>>>
>>>> Email: armin.erkert at rolmail.net
>>>> Tel.:  +39 349 4385335
>>>> WWW:   www.erkert.it
>>>>
>>
>>
>>
>> --------------------------------
>> Ing. Erkert Armin
>> Mittelstrich 9
>> I-39050 Tiers (BZ)
>>
>> Email: armin.erkert at rolmail.net
>> Tel.:  +39 349 4385335
>> WWW:   www.erkert.it
>>



--------------------------------
Ing. Erkert Armin
Mittelstrich 9
I-39050 Tiers (BZ)

Email: armin.erkert at rolmail.net
Tel.:  +39 349 4385335
WWW:   www.erkert.it