1:N Threaded Example

[Andres Sagot]

Hello All,

 

I am looking for a 1:N threaded example. Single input pipeline to appsink (or similar) then multiple output pipelines.

 

I am also curious to know how to keep multiple pipeline in sync.

 

For example: https://i.stack.imgur.com/qdeoZ.png

 

How would you delay the original video stream so that the results from the processing block (assuming it takes more than 1 frame to calculate) are synchronized before doing the overlay.

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[Vinod Kesti]

Media buffer time stamp will take care of the sync.

gst-launch-1.0 filesrc location=~/streams/apple_add.mp4 ! qtdemux ! \
h264parse ! video/x-h264,stream-foramt=byte-stream ! tee name=split \
split.! queue max-size-time=3000000000 ! filesink
location=~/streams/apple_add.264 \
split.! queue max-size-time=3000000000 ! avdec_h264 ! videoscale !
video/x-raw,width=640,height=480 ! x264enc tune=4 ! mp4mux ! filesink
location=~/streams/apple_add_360.mp4

Add queue size as per your processing delay. Set below queue property for
buffering.
 
 max-size-buffers    : Max. number of buffers in the queue (0=disable)
                        flags: readable, writable, changeable in NULL,
READY, PAUSED or PLAYING state
                        Unsigned Integer. Range: 0 - 4294967295 Default: 200
  max-size-bytes      : Max. amount of data in the queue (bytes, 0=disable)
                        flags: readable, writable, changeable in NULL,
READY, PAUSED or PLAYING state
                        Unsigned Integer. Range: 0 - 4294967295 Default:
10485760
  max-size-time       : Max. amount of data in the queue (in ns, 0=disable)
                        flags: readable, writable, changeable in NULL,
READY, PAUSED or PLAYING state




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[Andres Sagot]

Can you point me to where I can get more information on the media buffer time stamp? I don't see where it comes into play in the pipeline you describe.

 

03.09.2019, 22:25, "Vinod Kesti" <[hidden email]>:

Media buffer time stamp will take care of the sync.

gst-launch-1.0 filesrc location=~/streams/apple_add.mp4 ! qtdemux ! \
h264parse ! video/x-h264,stream-foramt=byte-stream ! tee name=split \
split.! queue max-size-time=3000000000 ! filesink
location=~/streams/apple_add.264 \
split.! queue max-size-time=3000000000 ! avdec_h264 ! videoscale !
video/x-raw,width=640,height=480 ! x264enc tune=4 ! mp4mux ! filesink
location=~/streams/apple_add_360.mp4

Add queue size as per your processing delay. Set below queue property for
buffering.

 max-size-buffers : Max. number of buffers in the queue (0=disable)
                        flags: readable, writable, changeable in NULL,
READY, PAUSED or PLAYING state
                        Unsigned Integer. Range: 0 - 4294967295 Default: 200
  max-size-bytes : Max. amount of data in the queue (bytes, 0=disable)
                        flags: readable, writable, changeable in NULL,
READY, PAUSED or PLAYING state
                        Unsigned Integer. Range: 0 - 4294967295 Default:
10485760
  max-size-time : Max. amount of data in the queue (in ns, 0=disable)
                        flags: readable, writable, changeable in NULL,
READY, PAUSED or PLAYING state



 

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