Problem in getting File descriptor from pipeline

[Keyur Patel]

Further pipeline simplification

 

gst-launch  \

v4l2src device=/dev/video1 ! \

'video/x-raw-yuv,format=(fourcc)YUY2,width=640,height=480,framerate=30/1' !
\

fakesink &

 

this pipeline is also creating two /dev/video1 Fds.

 

I need both fds.

 

Regards,

Keyur Patel

 

From: gstreamer-devel-bounces at lists.freedesktop.org
[mailto:gstreamer-devel-bounces at lists.freedesktop.org] On Behalf Of Keyur
Patel
Sent: 04 January 2014 06:37
To: gstreamer-devel at lists.freedesktop.org
Subject: Problem in getting File descriptor from pipeline

 

Hi,

 

I have pipeline  as mentioned below

 

   /*Local video stream chaine*/

    gst_bin_add_many( GST_BIN( video_pipeline_tx ), source, capsfilter,
ffmpegcsd, ffcapsfiler, videoflip, videosink, NULL);

 

    /*Link the differents elements*/

    ret = gst_element_link_many( source, capsfilter, ffmpegcsd, ffcapsfiler,
videoflip, videosink, NULL);

 

    GstPad* data_pad = gst_element_get_static_pad (videoflip, "src");

    gst_pad_add_buffer_probe (data_pad, G_CALLBACK (gst_frame_data), this);

    gst_object_unref (data_pad);

 

where source is "v4l2src" /dev/video0

 

in normal pipeline PLAY state my application is opening two fd instants of
/dev/video0 (checked by ls -l /proc/pid/fd)

and after pipeline PAUSE state it close these two fds.

 

I want these two fds from code.

I have successfully get first fd by using 

g_object_get(source, "device-fd", &my_fd, NULL);

 

now i am unable to get 2nd fd, Can you please tell me why this 2nd FD is
open? Also  i need its File descriptor.

 

Thanks in advance, Please help

 

 

Regards,

Keyur Patel


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