Gstreamer exports pipeline graphs (pipeline graphs)
generate dot file
command line to generate dot file
export GST_DEBUG_DUMP_DOT_DIR=导出路径
The program calls the macro to generate the dot file
GST_DEBUG_BIN_TO_DOT_FILE(GST_BIN(pipeline), GST_DEBUG_GRAPH_SHOW_ALL, "pipeline");
// 或者
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS(GST_BIN(pipeline), GST_DEBUG_GRAPH_SHOW_ALL, "pipeline");
g_setenv("GST_DEBUG_DUMP_DOT_DIR", "/tmp/", TRUE);
dot file to png/pdf file
install graphviz
sudo apt install graphviz
export pdf/png
dot -Tpng xxxx.dot -o xxx.png
dot -Tpdf xxxx.dot -o xxx.pdf
Gstreamer log level setting
Set the environment variable GST_DEBUG
export GST_DEBUG = GST_DEBUG等级,单个元素:log等级
log level
| # | Name | Description |
|---|---------|----------------------------------------------------------------|
| 0 | none | No debug information is output. |
| 1 | ERROR | Logs all fatal errors. These are errors that do not allow the |
| | | core or elements to perform the requested action. The |
| | | application can still recover if programmed to handle the |
| | | conditions that triggered the error. |
| 2 | WARNING | Logs all warnings. Typically these are non-fatal, but |
| | | user-visible problems are expected to happen. |
| 3 | FIXME | Logs all "fixme" messages. Those typically that a codepath that|
| | | is known to be incomplete has been triggered. It may work in |
| | | most cases, but may cause problems in specific instances. |
| 4 | INFO | Logs all informational messages. These are typically used for |
| | | events in the system that only happen once, or are important |
| | | and rare enough to be logged at this level. |
| 5 | DEBUG | Logs all debug messages. These are general debug messages for |
| | | events that happen only a limited number of times during an |
| | | object's lifetime; these include setup, teardown, change of |
| | | parameters, etc. |
| 6 | LOG | Logs all log messages. These are messages for events that |
| | | happen repeatedly during an object's lifetime; these include |
| | | streaming and steady-state conditions. This is used for log |
| | | messages that happen on every buffer in an element for example.|
| 7 | TRACE | Logs all trace messages. Those are message that happen very |
| | | very often. This is for example is each time the reference |
| | | count of a GstMiniObject, such as a GstBuffer or GstEvent, is |
| | | modified. |
| 9 | MEMDUMP | Logs all memory dump messages. This is the heaviest logging and|
| | | may include dumping the content of blocks of memory. |
+------------------------------------------------------------------------------+