Tee with three forks and two appsinks: last appsink doesn't callback

[Dwight Kulkarni]

Hi Anton,

1) Is there a way I can copy frames out of splitmuxsink ?   Which callback
would I use for that if it's possible ?  Right now I am only using callback
of "format-location" on splitmuxsink.

2) Suppose I split up the pipeline as follows:

(this is already working)
*pipeline#1* = "v4l2src device=/dev/video1 ! video/x-raw, width=1920,
height=1080, framerate=15/1 ! vpuenc_h264 ! tee name=v ! queue ! h264parse
! appsink name=h264vid max-buffers=1 drop=true v. ! queue ! h264parse !
splitmuxsink name=filesink location=./videos/video%02d.mkv
max-size-time=10000000000 muxer-properties=\"properties,streamable=true\" ";


*pipeline#2* = "appsrc name=jpegvideosrc  ! queue ! avdec_h264 ! jpegenc !
appsink name=jpegsink max-buffers=1 drop=true"

For "pipeline#2" do I still need to terminate in an appsink or can I tap
into the end result of jpegenc with a callback (eg. new-sample or
need-data) and giving it a name. Something like:

string other_pipeline = "appsrc name=jpegvideosrc  ! queue ! avdec_h264 !
jpegenc name=jpegsink"



On Tue, Sep 14, 2021 at 10:57 AM Anton Pryima via gstreamer-devel <
gstreamer-devel at lists.freedesktop.org> wrote:

> Hello Dwight.
>
> Why do you need to construct a so complicated pipeline and do both
> encoding and decoding?
> Why not make a couple of pipelines:
> 1. v4l2src device=/dev/video1 ! video/x-raw, width=1920, height=1080,
> framerate=15/1 ! appsink
> 2. appsrc -> vpuenc_h264 ! splitmuxsink
> 3. appsrc -> jpegenc ! whatever you need next....  or just copy frames
> where every you need instead of second appsink.
>
> Beste regards,
> Anton.
>
> On Tue, Sep 14, 2021 at 5:43 PM Dwight Kulkarni via gstreamer-devel <
> gstreamer-devel at lists.freedesktop.org> wrote:
>
>> Hi all,
>>
>> I am trying to setup a pipeline with tee that has three forks. One of the
>> forks is a jpegsink that I want to then access the image. Whereas the first
>> two forks are working the last one for jpegsink is not.
>>
>> Here is what I do:
>>
>> gst_init (0, NULL);
>> string pipeline = "v4l2src device=/dev/video1 ! video/x-raw, width=1920,
>> height=1080, framerate=15/1 ! vpuenc_h264 ! tee name=v ! queue ! h264parse
>> ! appsink name=h264vid max-buffers=1 drop=true v. ! queue ! h264parse !
>> splitmuxsink name=filesink location=./videos/video%02d.mkv
>> max-size-time=10000000000 muxer-properties=\"properties,streamable=true\"
>> v. ! queue ! avdec_h264 ! jpegenc ! appsink name=jpegsink max-buffers=1
>> drop=true";
>> gstreamer_main_video_pipeline = gst_parse_launch(pipeline.c_str(),NULL);
>>
>> GstElement * jpegsink =
>> gst_bin_get_by_name_recurse_up(GST_BIN(gstreamer_main_video_pipeline),
>> "jpegsink");
>>
>> JpegContext* ctx = g_new0 (JpegContext, 1);
>> g_signal_connect (G_OBJECT(jpegsink), "new-sample",
>> G_CALLBACK(new_sample), ctx);
>>
>>
>> I never get the callback to new_sample, but the pipeline is running and
>> other two tee forks work properly.
>>
>> Any help would be appreciated!
>>
>> --
>> Sincerely,
>>
>> Dwight Kulkarni
>>
>

-- 
Sincerely,

Dwight Kulkarni
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