manpage
執行下面指令，觀看「gst-inspect-1.0」的使用說明。
$ man gst-inspect-1.0
help
執行
$ gst-inspect-1.0 --help
或是執行
$ gst-inspect-1.0 -h
顯示
Usage:
gst-inspect-1.0 [OPTION…] [ELEMENT-NAME | PLUGIN-NAME]
Help Options:
-h, --help Show help options
--help-all Show all help options
--help-gst Show GStreamer Options
Application Options:
-a, --print-all Print all elements
-b, --print-blacklist Print list of blacklisted files
--print-plugin-auto-install-info Print a machine-parsable list of features the specified plugin or all plugins provide.
Useful in connection with external automatic plugin installation mechanisms
--plugin List the plugin contents
-t, --types A slashes ('/') separated list of types of elements (also known as klass) to list. (unordered)
--exists Check if the specified element or plugin exists
--atleast-version When checking if an element or plugin exists, also check that its version is at least the version specified
-u, --uri-handlers Print supported URI schemes, with the elements that implement them
--version Print version information and exit
version
執行
$ gst-inspect-1.0 --version
顯示
gst-inspect-1.0 version 1.12.3
GStreamer 1.12.3
https://launchpad.net/distros/ubuntu/+source/gstreamer1.0
使用範例
執行
$ gst-inspect-1.0
或是執行
$ gst-inspect-1.0 --plugin
會顯示一個很長的列表
vaapi: vaapimpeg2dec: VA-API MPEG2 decoder
vaapi: vaapisink: VA-API sink
...略...
Total count: 237 plugins, 1375 features
所以可以執行下面指令，分頁觀看
$ gst-inspect-1.0 | less
也可以搭配「grep」，來過濾出要關注的
例如執行下面指令
$ gst-inspect-1.0 | grep playbin
顯示如下的兩筆資料
playback: playbin: Player Bin 2
playback: playbin3: Player Bin 3
- 第一個欄位「playback」是「Plugin Name」
- 第二個欄位「playbin」或「playbin3」是「Element Name」
- 第三個欄位「Player Bin 2」或「Player Bin 3」是「簡述」
參數
然後從一開始看到的下指令的樣式，如下：
gst-inspect-1.0 [OPTION...] [PLUGIN|ELEMENT]
可以了解到，在「gst-inspect-1.0」可以接「PLUGIN」或「ELEMENT」當參數。
接「PLUGIN」當參數
所以從上面的例子，接「PLUGIN」當參數的範例，可以執行下面指令，
$ gst-inspect-1.0 playback
顯示
Plugin Details:
Name playback
Description various playback elements
Filename /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstplayback.so
Version 1.12.3
License LGPL
Source module gst-plugins-base
Source release date 2017-09-18
Binary package GStreamer Base Plugins (Ubuntu)
Origin URL https://launchpad.net/distros/ubuntu/+source/gst-plugins-base1.0
playbin: Player Bin 2
playbin3: Player Bin 3
playsink: Player Sink
subtitleoverlay: Subtitle Overlay
streamsynchronizer: Stream Synchronizer
decodebin: Decoder Bin
decodebin3: Decoder Bin 3
uridecodebin: URI Decoder
urisourcebin: URI reader
parsebin: Parse Bin
10 features:
+-- 10 elements
從上面的「Filename」那行
Filename /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstplayback.so
於是可以執行下面指令
$ dpkg -S /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstplayback.so
顯示
gstreamer1.0-plugins-base:amd64: /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstplayback.so
了解到「/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstplayback.so」這個檔案，是來自於「gstreamer1.0-plugins-base」這個套件。
然後從上面也可以看到下面的「Element列表」，
playbin: Player Bin 2
playbin3: Player Bin 3
playsink: Player Sink
subtitleoverlay: Subtitle Overlay
streamsynchronizer: Stream Synchronizer
decodebin: Decoder Bin
decodebin3: Decoder Bin 3
uridecodebin: URI Decoder
urisourcebin: URI reader
parsebin: Parse Bin
也可以執行下面指令，獲得「Plugin - playback」的「Elment列表」。
$ gst-inspect-1.0 | grep '^playback:'
顯示
playback: playbin: Player Bin 2
playback: playbin3: Player Bin 3
playback: playsink: Player Sink
playback: subtitleoverlay: Subtitle Overlay
playback: streamsynchronizer: Stream Synchronizer
playback: decodebin: Decoder Bin
playback: decodebin3: Decoder Bin 3
playback: uridecodebin: URI Decoder
playback: urisourcebin: URI reader
playback: parsebin: Parse Bin
從「GStreamer documentation / List of Elements and Plugins」，
可以找到「Plugin - playback」。
裡面也有列上面的「Element列表」。
Elements
decodebin Autoplug and decode to raw media
decodebin3 Autoplug and decode to raw media
parsebin Parse and de-multiplex to elementary stream
playbin Autoplug and play media from an uri
playbin3 Autoplug and play media from an uri
playsink Convenience sink for multiple streams
streamsynchronizer Synchronizes a group of streams to have equal durations and starting points
subtitleoverlay Overlays a video stream with subtitles
uridecodebin Autoplug and decode an URI to raw media
urisourcebin Download and buffer a URI as needed
所以可以找到各個「Element」的說明頁，例如
接「Element」當參數
再來回到指令，接「Element」當參數的範例，可以執行下面指令，
$ gst-inspect-1.0 playbin
顯示
Factory Details:
Rank none (0)
Long-name Player Bin 2
Klass Generic/Bin/Player
Description Autoplug and play media from an uri
Author Wim Taymans <wim.taymans@gmail.com>
Plugin Details:
Name playback
Description various playback elements
Filename /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstplayback.so
Version 1.12.3
License LGPL
Source module gst-plugins-base
Source release date 2017-09-18
Binary package GStreamer Base Plugins (Ubuntu)
Origin URL https://launchpad.net/distros/ubuntu/+source/gst-plugins-base1.0
GObject
+----GInitiallyUnowned
+----GstObject
+----GstElement
+----GstBin
+----GstPipeline
+----GstPlayBin
Implemented Interfaces:
GstChildProxy
GstStreamVolume
GstVideoOverlay
GstNavigation
GstColorBalance
Pad Templates:
none
Element Flags:
no flags set
Bin Flags:
no flags set
Element Implementation:
Has change_state() function: gst_play_bin_change_state
Element has no clocking capabilities.
Element has no URI handling capabilities.
Pads:
none
Element Properties:
name : The name of the object
flags: readable, writable
String. Default: "playbin0"
parent : The parent of the object
flags: readable, writable
Object of type "GstObject"
async-handling : The bin will handle Asynchronous state changes
flags: readable, writable
Boolean. Default: false
message-forward : Forwards all children messages
flags: readable, writable
Boolean. Default: false
delay : Expected delay needed for elements to spin up to PLAYING in nanoseconds
flags: readable, writable
Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 0
auto-flush-bus : Whether to automatically flush the pipeline's bus when going from READY into NULL state
flags: readable, writable
Boolean. Default: true
latency : Latency to configure on the pipeline
flags: readable, writable
Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 18446744073709551615
uri : URI of the media to play
flags: readable, writable
String. Default: null
current-uri : The currently playing URI
flags: readable
String. Default: null
suburi : Optional URI of a subtitle
flags: readable, writable
String. Default: null
current-suburi : The currently playing URI of a subtitle
flags: readable
String. Default: null
source : Source element
flags: readable
Object of type "GstElement"
flags : Flags to control behaviour
flags: readable, writable
Flags "GstPlayFlags" Default: 0x00000617, "soft-colorbalance+deinterlace+soft-volume+text+audio+video"
(0x00000001): video - Render the video stream
(0x00000002): audio - Render the audio stream
(0x00000004): text - Render subtitles
(0x00000008): vis - Render visualisation when no video is present
(0x00000010): soft-volume - Use software volume
(0x00000020): native-audio - Only use native audio formats
(0x00000040): native-video - Only use native video formats
(0x00000080): download - Attempt progressive download buffering
(0x00000100): buffering - Buffer demuxed/parsed data
(0x00000200): deinterlace - Deinterlace video if necessary
(0x00000400): soft-colorbalance - Use software color balance
(0x00000800): force-filters - Force audio/video filter(s) to be applied
n-video : Total number of video streams
flags: readable
Integer. Range: 0 - 2147483647 Default: 0
current-video : Currently playing video stream (-1 = auto)
flags: readable, writable
Integer. Range: -1 - 2147483647 Default: -1
n-audio : Total number of audio streams
flags: readable
Integer. Range: 0 - 2147483647 Default: 0
current-audio : Currently playing audio stream (-1 = auto)
flags: readable, writable
Integer. Range: -1 - 2147483647 Default: -1
n-text : Total number of text streams
flags: readable
Integer. Range: 0 - 2147483647 Default: 0
current-text : Currently playing text stream (-1 = auto)
flags: readable, writable
Integer. Range: -1 - 2147483647 Default: -1
subtitle-encoding : Encoding to assume if input subtitles are not in UTF-8 encoding. If not set, the GST_SUBTITLE_ENCODING environment variable will be checked for an encoding to use. If that is not set either, ISO-8859-15 will be assumed.
flags: readable, writable
String. Default: null
audio-sink : the audio output element to use (NULL = default sink)
flags: readable, writable
Object of type "GstElement"
video-sink : the video output element to use (NULL = default sink)
flags: readable, writable
Object of type "GstElement"
vis-plugin : the visualization element to use (NULL = default)
flags: readable, writable
Object of type "GstElement"
text-sink : the text output element to use (NULL = default subtitleoverlay)
flags: readable, writable
Object of type "GstElement"
video-stream-combiner: Current video stream combiner (NULL = input-selector)
flags: readable, writable
Object of type "GstElement"
audio-stream-combiner: Current audio stream combiner (NULL = input-selector)
flags: readable, writable
Object of type "GstElement"
text-stream-combiner: Current text stream combiner (NULL = input-selector)
flags: readable, writable
Object of type "GstElement"
volume : The audio volume, 1.0=100%
flags: readable, writable
Double. Range: 0 - 10 Default: 1
mute : Mute the audio channel without changing the volume
flags: readable, writable
Boolean. Default: false
sample : The last sample (NULL = no video available)
flags: readable
Boxed pointer of type "GstSample"
subtitle-font-desc : Pango font description of font to be used for subtitle rendering
flags: writable
String. Default: null Write only
connection-speed : Network connection speed in kbps (0 = unknown)
flags: readable, writable
Unsigned Integer64. Range: 0 - 18446744073709551 Default: 0
buffer-size : Buffer size when buffering network streams
flags: readable, writable
Integer. Range: -1 - 2147483647 Default: -1
buffer-duration : Buffer duration when buffering network streams
flags: readable, writable
Integer64. Range: -1 - 9223372036854775807 Default: -1
av-offset : The synchronisation offset between audio and video in nanoseconds
flags: readable, writable
Integer64. Range: -9223372036854775808 - 9223372036854775807 Default: 0
ring-buffer-max-size: Max. amount of data in the ring buffer (bytes, 0 = ring buffer disabled)
flags: readable, writable
Unsigned Integer64. Range: 0 - 4294967295 Default: 0
force-aspect-ratio : When enabled, scaling will respect original aspect ratio
flags: readable, writable
Boolean. Default: true
audio-filter : the audio filter(s) to apply, if possible
flags: readable, writable
Object of type "GstElement"
video-filter : the video filter(s) to apply, if possible
flags: readable, writable
Object of type "GstElement"
video-multiview-mode: Re-interpret a video stream as one of several frame-packed stereoscopic modes.
flags: readable, writable
Enum "GstVideoMultiviewFramePacking" Default: -1, "none"
(-1): none - GST_VIDEO_MULTIVIEW_FRAME_PACKING_NONE
(0): mono - GST_VIDEO_MULTIVIEW_FRAME_PACKING_MONO
(1): left - GST_VIDEO_MULTIVIEW_FRAME_PACKING_LEFT
(2): right - GST_VIDEO_MULTIVIEW_FRAME_PACKING_RIGHT
(3): side-by-side - GST_VIDEO_MULTIVIEW_FRAME_PACKING_SIDE_BY_SIDE
(4): side-by-side-quincunx - GST_VIDEO_MULTIVIEW_FRAME_PACKING_SIDE_BY_SIDE_QUINCUNX
(5): column-interleaved - GST_VIDEO_MULTIVIEW_FRAME_PACKING_COLUMN_INTERLEAVED
(6): row-interleaved - GST_VIDEO_MULTIVIEW_FRAME_PACKING_ROW_INTERLEAVED
(7): top-bottom - GST_VIDEO_MULTIVIEW_FRAME_PACKING_TOP_BOTTOM
(8): checkerboard - GST_VIDEO_MULTIVIEW_FRAME_PACKING_CHECKERBOARD
video-multiview-flags: Override details of the multiview frame layout
flags: readable, writable
Flags "GstVideoMultiviewFlags" Default: 0x00000000, "none"
(0x00000000): none - GST_VIDEO_MULTIVIEW_FLAGS_NONE
(0x00000001): right-view-first - GST_VIDEO_MULTIVIEW_FLAGS_RIGHT_VIEW_FIRST
(0x00000002): left-flipped - GST_VIDEO_MULTIVIEW_FLAGS_LEFT_FLIPPED
(0x00000004): left-flopped - GST_VIDEO_MULTIVIEW_FLAGS_LEFT_FLOPPED
(0x00000008): right-flipped - GST_VIDEO_MULTIVIEW_FLAGS_RIGHT_FLIPPED
(0x00000010): right-flopped - GST_VIDEO_MULTIVIEW_FLAGS_RIGHT_FLOPPED
(0x00004000): half-aspect - GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT
(0x00008000): mixed-mono - GST_VIDEO_MULTIVIEW_FLAGS_MIXED_MONO
Element Signals:
"about-to-finish" : void user_function (GstElement* object,
gpointer user_data);
"video-changed" : void user_function (GstElement* object,
gpointer user_data);
"audio-changed" : void user_function (GstElement* object,
gpointer user_data);
"text-changed" : void user_function (GstElement* object,
gpointer user_data);
"video-tags-changed" : void user_function (GstElement* object,
gint arg0,
gpointer user_data);
"audio-tags-changed" : void user_function (GstElement* object,
gint arg0,
gpointer user_data);
"text-tags-changed" : void user_function (GstElement* object,
gint arg0,
gpointer user_data);
"source-setup" : void user_function (GstElement* object,
GstElement* arg0,
gpointer user_data);
"element-setup" : void user_function (GstElement* object,
GstElement* arg0,
gpointer user_data);
Element Actions:
"get-video-tags" : GstTagList * user_function (GstElement* object,
gint arg0);
"get-audio-tags" : GstTagList * user_function (GstElement* object,
gint arg0);
"get-text-tags" : GstTagList * user_function (GstElement* object,
gint arg0);
"convert-sample" : GstSample * user_function (GstElement* object,
GstCaps* arg0);
"get-video-pad" : GstPad * user_function (GstElement* object,
gint arg0);
"get-audio-pad" : GstPad * user_function (GstElement* object,
gint arg0);
"get-text-pad" : GstPad * user_function (GstElement* object,
gint arg0);
Children:
playsink
執行
$ gst-inspect-1.0 playbin3
顯示
Factory Details:
Rank none (0)
Long-name Player Bin 3
Klass Generic/Bin/Player
Description Autoplug and play media from an uri
Author Wim Taymans <wim.taymans@gmail.com>
Plugin Details:
Name playback
Description various playback elements
Filename /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstplayback.so
Version 1.12.3
License LGPL
Source module gst-plugins-base
Source release date 2017-09-18
Binary package GStreamer Base Plugins (Ubuntu)
Origin URL https://launchpad.net/distros/ubuntu/+source/gst-plugins-base1.0
GObject
+----GInitiallyUnowned
+----GstObject
+----GstElement
+----GstBin
+----GstPipeline
+----GstPlayBin3
Implemented Interfaces:
GstChildProxy
GstStreamVolume
GstVideoOverlay
GstNavigation
GstColorBalance
Pad Templates:
none
Element Flags:
no flags set
Bin Flags:
no flags set
Element Implementation:
Has change_state() function: gst_play_bin3_change_state
Element has no clocking capabilities.
Element has no URI handling capabilities.
Pads:
none
Element Properties:
name : The name of the object
flags: readable, writable
String. Default: "playbin3-0"
parent : The parent of the object
flags: readable, writable
Object of type "GstObject"
async-handling : The bin will handle Asynchronous state changes
flags: readable, writable
Boolean. Default: false
message-forward : Forwards all children messages
flags: readable, writable
Boolean. Default: false
delay : Expected delay needed for elements to spin up to PLAYING in nanoseconds
flags: readable, writable
Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 0
auto-flush-bus : Whether to automatically flush the pipeline's bus when going from READY into NULL state
flags: readable, writable
Boolean. Default: true
latency : Latency to configure on the pipeline
flags: readable, writable
Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 18446744073709551615
uri : URI of the media to play
flags: readable, writable
String. Default: null
current-uri : The currently playing URI
flags: readable
String. Default: null
suburi : Optional URI of a subtitle
flags: readable, writable
String. Default: null
current-suburi : The currently playing URI of a subtitle
flags: readable
String. Default: null
source : Source element
flags: readable
Object of type "GstElement"
flags : Flags to control behaviour
flags: readable, writable
Flags "GstPlayFlags" Default: 0x00000717, "soft-colorbalance+deinterlace+buffering+soft-volume+text+audio+video"
(0x00000001): video - Render the video stream
(0x00000002): audio - Render the audio stream
(0x00000004): text - Render subtitles
(0x00000008): vis - Render visualisation when no video is present
(0x00000010): soft-volume - Use software volume
(0x00000020): native-audio - Only use native audio formats
(0x00000040): native-video - Only use native video formats
(0x00000080): download - Attempt progressive download buffering
(0x00000100): buffering - Buffer demuxed/parsed data
(0x00000200): deinterlace - Deinterlace video if necessary
(0x00000400): soft-colorbalance - Use software color balance
(0x00000800): force-filters - Force audio/video filter(s) to be applied
subtitle-encoding : Encoding to assume if input subtitles are not in UTF-8 encoding. If not set, the GST_SUBTITLE_ENCODING environment variable will be checked for an encoding to use. If that is not set either, ISO-8859-15 will be assumed.
flags: readable, writable
String. Default: null
audio-sink : the audio output element to use (NULL = default sink)
flags: readable, writable
Object of type "GstElement"
video-sink : the video output element to use (NULL = default sink)
flags: readable, writable
Object of type "GstElement"
vis-plugin : the visualization element to use (NULL = default)
flags: readable, writable
Object of type "GstElement"
text-sink : the text output element to use (NULL = default subtitleoverlay)
flags: readable, writable
Object of type "GstElement"
video-stream-combiner: Current video stream combiner (NULL = input-selector)
flags: readable, writable
Object of type "GstElement"
audio-stream-combiner: Current audio stream combiner (NULL = input-selector)
flags: readable, writable
Object of type "GstElement"
text-stream-combiner: Current text stream combiner (NULL = input-selector)
flags: readable, writable
Object of type "GstElement"
volume : The audio volume, 1.0=100%
flags: readable, writable
Double. Range: 0 - 10 Default: 1
mute : Mute the audio channel without changing the volume
flags: readable, writable
Boolean. Default: false
sample : The last sample (NULL = no video available)
flags: readable
Boxed pointer of type "GstSample"
subtitle-font-desc : Pango font description of font to be used for subtitle rendering
flags: writable
String. Default: null Write only
connection-speed : Network connection speed in kbps (0 = unknown)
flags: readable, writable
Unsigned Integer64. Range: 0 - 18446744073709551 Default: 0
buffer-size : Buffer size when buffering network streams
flags: readable, writable
Integer. Range: -1 - 2147483647 Default: -1
buffer-duration : Buffer duration when buffering network streams
flags: readable, writable
Integer64. Range: -1 - 9223372036854775807 Default: -1
av-offset : The synchronisation offset between audio and video in nanoseconds
flags: readable, writable
Integer64. Range: -9223372036854775808 - 9223372036854775807 Default: 0
ring-buffer-max-size: Max. amount of data in the ring buffer (bytes, 0 = ring buffer disabled)
flags: readable, writable
Unsigned Integer64. Range: 0 - 4294967295 Default: 0
force-aspect-ratio : When enabled, scaling will respect original aspect ratio
flags: readable, writable
Boolean. Default: true
audio-filter : the audio filter(s) to apply, if possible
flags: readable, writable
Object of type "GstElement"
video-filter : the video filter(s) to apply, if possible
flags: readable, writable
Object of type "GstElement"
video-multiview-mode: Re-interpret a video stream as one of several frame-packed stereoscopic modes.
flags: readable, writable
Enum "GstVideoMultiviewFramePacking" Default: -1, "none"
(-1): none - GST_VIDEO_MULTIVIEW_FRAME_PACKING_NONE
(0): mono - GST_VIDEO_MULTIVIEW_FRAME_PACKING_MONO
(1): left - GST_VIDEO_MULTIVIEW_FRAME_PACKING_LEFT
(2): right - GST_VIDEO_MULTIVIEW_FRAME_PACKING_RIGHT
(3): side-by-side - GST_VIDEO_MULTIVIEW_FRAME_PACKING_SIDE_BY_SIDE
(4): side-by-side-quincunx - GST_VIDEO_MULTIVIEW_FRAME_PACKING_SIDE_BY_SIDE_QUINCUNX
(5): column-interleaved - GST_VIDEO_MULTIVIEW_FRAME_PACKING_COLUMN_INTERLEAVED
(6): row-interleaved - GST_VIDEO_MULTIVIEW_FRAME_PACKING_ROW_INTERLEAVED
(7): top-bottom - GST_VIDEO_MULTIVIEW_FRAME_PACKING_TOP_BOTTOM
(8): checkerboard - GST_VIDEO_MULTIVIEW_FRAME_PACKING_CHECKERBOARD
video-multiview-flags: Override details of the multiview frame layout
flags: readable, writable
Flags "GstVideoMultiviewFlags" Default: 0x00000000, "none"
(0x00000000): none - GST_VIDEO_MULTIVIEW_FLAGS_NONE
(0x00000001): right-view-first - GST_VIDEO_MULTIVIEW_FLAGS_RIGHT_VIEW_FIRST
(0x00000002): left-flipped - GST_VIDEO_MULTIVIEW_FLAGS_LEFT_FLIPPED
(0x00000004): left-flopped - GST_VIDEO_MULTIVIEW_FLAGS_LEFT_FLOPPED
(0x00000008): right-flipped - GST_VIDEO_MULTIVIEW_FLAGS_RIGHT_FLIPPED
(0x00000010): right-flopped - GST_VIDEO_MULTIVIEW_FLAGS_RIGHT_FLOPPED
(0x00004000): half-aspect - GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT
(0x00008000): mixed-mono - GST_VIDEO_MULTIVIEW_FLAGS_MIXED_MONO
Element Signals:
"about-to-finish" : void user_function (GstElement* object,
gpointer user_data);
"source-setup" : void user_function (GstElement* object,
GstElement* arg0,
gpointer user_data);
"element-setup" : void user_function (GstElement* object,
GstElement* arg0,
gpointer user_data);
Element Actions:
"convert-sample" : GstSample * user_function (GstElement* object,
GstCaps* arg0);
Children:
playsink
參數「-a」
執行
$ gst-inspect-1.0 -a
會顯示所有的「Plugin/Element」相關資訊。
所以可以搭配「less」，來分頁觀看
$ gst-inspect-1.0 -a | less
package
執行
$ which gst-inspect-1.0
顯示
/usr/bin/gst-inspect-1.0
執行
$ dpkg -S /usr/bin/gst-inspect-1.0
顯示
gstreamer1.0-tools: /usr/bin/gst-inspect-1.0
關於「gst-inspect-1.0」這個指令，是來自於「gstreamer1.0-tools」這個套件，相關探索可以參考「這裡」。
上面的指令，可以合併成一行來執行
$ dpkg -S $(which gst-inspect-1.0)
顯示
gstreamer1.0-tools: /usr/bin/gst-inspect-1.0
The debug log
可以參考「GStreamer / Documentation / Tutorials / Basic tutorial 11: Debugging tools / The debug log」，
執行
GST_DEBUG=4 gst-inspect-1.0 playbin
會看到類似如下的訊息
0:00:00.000085979 25777 0x56554c077e00 INFO GST_INIT gst.c:507:init_pre: Initializing GStreamer Core Library version 1.12.3
0:00:00.000164823 25777 0x56554c077e00 INFO GST_INIT gst.c:508:init_pre: Using library installed in /usr/lib/x86_64-linux-gnu
...略...
相關連結
- GStreamer documentation / Command line tools / gst-inspect-1.0
- GStreamer documentation / Tutorials / Basic tutorial 10: GStreamer tools / gst-inspect-1.0
- GStreamer documentation / Tutorials / Basic tutorial 11: Debugging tools / The debug log
搭配 gst-launch-1.0
接下來可以了解，關於「gst-launch-1.0」的「用法」。