GstShark - Buffer tracer

GstShark
Getting Started
Getting the code Dependencies Building tracers Eclipse Plugin
Generating trace files
Tracer Parameters
Available Tracers
InterLatency Processing time Frame rate Schedule time CPU usage Graphic Bitrate Queue Level Buffer
Results
Common Trace Format Pipeline Diagram
Visualization Tools
gstshark-plot Eclipse plugin
Examples
CPU usage analysis Frame rate example Processing time example Scheduling time example Interlatency example
Contact Us

The Buffer tracer prints out information about each buffer that goes out of a source pad of an element.

Problems running the pipelines shown on this page? Please see our GStreamer Debugging guide for help.

Pipeline

The following pipeline demonstrates the use of the buffer tracer and the results obtained.

GST_DEBUG="GST_TRACER:7" GST_TRACERS="buffer" gst-launch-1.0 videotestsrc ! fakesink sync=true

Output

0:00:01.885628787 29682      0x2220630 TRACE             GST_TRACER :0:: buffer, pad=(string)videotestsrc0:src, pts=(string)0:00:01.900000000, dts=(string)0:00:01.900000000, duration=(string)0:00:00.033333333, offset=(guint64)57, offset_end=(guint64)58, size=(guint64)115200, flags=(string)0, refcount=(uint)1;
0:00:01.918977957 29682      0x2220630 TRACE             GST_TRACER :0:: buffer, pad=(string)videotestsrc0:src, pts=(string)0:00:01.933333333, dts=(string)0:00:01.933333333, duration=(string)0:00:00.033333333, offset=(guint64)58, offset_end=(guint64)59, size=(guint64)115200, flags=(string)0, refcount=(uint)1;

Each output log line includes several fields with information about each buffer that goes out of a source pad of an element. Data includes pts, dts, duration, offset, offset_end, size, flags and refcount.