GStreamer Daemon - New Clock
This wiki shows how to use the bus_<action> to read the bus in the pipeline, with the bus_filter command we can filter the new_clock messages then use the bus_read to read them.
Example
The following example is a bash script that demonstrates the simple slow motion playback.
1 #!/bin/bash
2
3 # Absolute path to the video location
4 VIDEO=$1
5
6 # Graceful cleanup upon CTRL-C
7 trap "gstd-client pipeline_delete p; exit" SIGHUP SIGINT SIGTERM
8
9 # Make sure there is no pipeline with this name already
10 gstd-client pipeline_delete p
11
12 gstd-client pipeline_create p playbin uri=file://$VIDEO
13
14 # Filter only a new-clock
15 gstd-client bus_filter p new_clock
16
17 # Play the pipeline
18 gstd-client pipeline_play p
19
20 # Waiting until bus read a message error
21 gstd-client bus_read p
The output of the command bus_read should be as follows:
{
"code" : 0,
"description" : "Success",
"response" : {
"type" : "new-clock",
"source" : "p",
"timestamp" : "99:99:99.999999999",
"seqnum" : 95411
}
}
To run the script you will need an existing video. You may use the video recording simple example to quickly use Gstd to record one. To run the new-clock script, type
./new-clock.sh /tmp/video.mp4
