Difference between revisions of "Gst-discoverer"

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1 Overview[edit]

gst-discoverer (gst-discoverer-1.0) is a GStreamer command line utility.

This utility can be used to get information on multimedia content such as images, audio/video files.

2 Usage[edit]

gst-discoverer accepts the following options:

 gst-discoverer-1.0 --help

gst-discoverer-1.0 --help
Usage:
  gst-discoverer-1.0 [OPTION?] - discover files synchronously with GstDiscoverer

Help Options:
  -h, --help                        Show help options
  --help-all                        Show all help options
  --help-gst                        Show GStreamer Options

Application Options:
  -a, --async                       Run asynchronously
  -t, --timeout=T                   Specify timeout (in seconds, default 10)
  -c, --toc                         Output TOC (chapters and editions)
  -v, --verbose                     Verbose properties

By default a short level of information is given including the container format, the audio and the video codecs:

 gst-discoverer-1.0 big_buck_bunny_480p_VP8_VORBIS_25fps_1900K_short.WebM

/usr/local/demo/media/ST2297_visionv3.webm
Analyzing file:///homeusr/root/big_buck_bunny_480p_VP8_VORBIS_25fps_1900K_short.WebMlocal/demo/media/ST2297_visionv3.webm
Done discovering file:///homeusr/root/big_buck_bunny_480p_VP8_VORBIS_25fps_1900K_short.WebM

local/demo/media/ST2297_visionv3.webm
 
Topology:
  container: WebM
    audio: Vorbis
    video: VP8

Properties:
  Duration: 0:0004:0402.000000000413000000
  Seekable: yes
  TagsLive: no
      title: big_buck_bunny_480p_surround-fix.avi_041.AVITags: 
      container format: Matroska
      language code: unden
      application name: SUPER(C)Lavc56.60.100
         encoder: Xiph.Org libVorbis I 20070622
20150105 (????)
      encoder version: 0
      audio codec: Vorbis
      nominal bitrate: 80000112000
      bitrate: 80000112000
      video codec: On2 VP8

The -v option gives more details such as the number of audio channels, the audio sample rate, the video width and height or even the pixel aspect ratio:

 gst-discoverer-1.0 -v big_buck_bunny_480p_VP8_VORBIS_25fps_1900K_short.WebM

/usr/local/demo/media/ST2297_visionv3.webm
Analyzing file:///homeusr/root/big_buck_bunny_480p_VP8_VORBIS_25fps_1900K_short.WebMlocal/demo/media/ST2297_visionv3.webm
Done discovering file:///homeusr/root/big_buck_bunny_480p_VP8_VORBIS_25fps_1900K_short.WebMlocal/demo/media/ST2297_visionv3.webm

Topology:
  container: video/webm
    audio: audio/x-vorbis, channels=(int)2, rate=(int)4410048000, streamheader=(buffer)<>
< 01766f7262697[...]
      Tags:
        title: big_buck_bunny_480p_surround-fix.avi_041.AVI
        container format: Matroska
        language code: unden
        application name: SUPER(C)Lavc56.60.100
           encoder: Xiph.Org libVorbis I 20070622
20150105 (????)
        encoder version: 0
        audio codec: Vorbis
        nominal bitrate: 80000112000
        bitrate: 80000112000
     
       Codec:
        audio/x-vorbis, channels=(int)2, rate=(int)4410048000, streamheader=(buffer)<>< 01766f72 [...]
    Additional info:
        None
      Stream ID: b2ab3c289a804933c863327b88bbe3eac46bb36c16a173328c94e4928c7222ae18eb4f2d90d91d79f9bf3f9b9e41e785ee2cc1396d37b5ad127838437f6a3847/002:002
      Language: unden
      Channels: 2 (front-left, front-right)
      Sample rate: 4410048000
      Depth: 32
      Bitrate: 80000112000
      Max bitrate: 0
    video: video/x-vp8, width=(int)854640, height=(int)480360, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)025/1
      Tags:
        title: big_buck_bunny_480p_surround-fix.avi_041.AVI
        container format: Matroska
        video codec: On2 VP8
        language code: unden
     
       Codec:
        video/x-vp8, width=(int)854640, height=(int)480360, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)025/1
      Additional info:
        None
      Stream ID: b2ab3c289a804933c863327b88bbe3eac46bb36c16a173328c94e4928c7222ae18eb4f2d90d91d79f9bf3f9b9e41e785ee2cc1396d37b5ad127838437f6a3847/001:001
      Width: 854640
      Height: 480360
      Depth: 24
      Frame rate: 025/1
      Pixel aspect ratio: 1/1
      Interlaced: false
      Bitrate: 0
      Max bitrate: 0

Properties:
  Duration: 0:0004:0402.000000000413000000
  Seekable: yes
  Live: no
  Tags: 
      title: big_buck_bunny_480p_surround-fix.avi_041.AVIcontainer format: Matroska
      containervideo formatcodec: MatroskaOn2 VP8
      language code: unden
      application name: SUPER(C)Lavc56.60.100
         encoder: Xiph.Org libVorbis I 20070622
20150105 (????)
      encoder version: 0
      audio codec: Vorbis
      nominal bitrate: 80000112000
      bitrate: 80000
      video codec: On2 VP8
112000

<noinclude>

{{ArticleMainWriter | HuguesF}}
{{ArticleApprovedVersion | HuguesF | Jean-ChristopheT | No previous approved version | BrunoB - 11Jun'18 - 7658 | 11Jun'18 }}

[[Category:GStreamer]]</noinclude>

== Overview ==
{{highlight|'''gst-discoverer'''}} (gst-discoverer-1.0) is a GStreamer command line utility.

This utility can be used to get information on multimedia content such as images, audio/video files.

== Usage ==
gst-discoverer accepts the following options:
 {{Board$}} gst-discoverer-1.0 --help<pre>

gst-discoverer-1.0 --help
Usage:
  gst-discoverer-1.0 [OPTION?] - discover files synchronously with GstDiscoverer

Help Options:
  -h, --help                        Show help options
  --help-all                        Show all help options
  --help-gst                        Show GStreamer Options

Application Options:
  -a, --async                       Run asynchronously
  -t, --timeout=T                   Specify timeout (in seconds, default 10)
  -c, --toc                         Output TOC (chapters and editions)
  -v, --verbose                     Verbose properties</pre>


By default a short level of information is given including the container format, the audio and the video codecs: 

 {{Board$}} gst-discoverer-1.0 big_buck_bunny_480p_VP8_VORBIS_25fps_1900K_short.WebM<pre>

Analyzing file:///home/root/big_buck_bunny_480p_VP8_VORBIS_25fps_1900K_short.WebM
Done discovering file:///home/root/big_buck_bunny_480p_VP8_VORBIS_25fps_1900K_short.WebM

Topology:
  container: WebM
    audio: Vorbis
    video: VP8

Properties:
  Duration: 0:00:04.000000000
  Seekable: yes
  Tags: 
      title: big_buck_bunny_480p_surround-fix.avi_041.AVI
      container format: Matroska
      language code: und
      application name: SUPER(C)   {{av_ref_file}}
 Analyzing file://{{av_ref_file}}
 Done discovering file://{{av_ref_file}}

 Topology:
   container: WebM
     audio: Vorbis
     video: VP8

 Properties:
   Duration: 0:04:02.413000000
   Seekable: yes
   Live: no
   Tags: 
       container format: Matroska
       language code: en
       application name: Lavc56.60.100encoder: Xiph.Org libVorbis I 20070622
      encoder version: 0
      audio codec: Vorbis
      nominal bitrate: 80000
      bitrate: 8000020150105 (????)
       encoder version: 0
       audio codec: Vorbis
       nominal bitrate: 112000
       bitrate: 112000video codec: On2 VP8</pre>


The {{highlight|'''-v'''}} option gives more details such as the number of audio channels, the audio sample rate, the video width and height or even the pixel aspect ratio:
 {{Board$}} gst-discoverer-1.0 -v big_buck_bunny_480p_VP8_VORBIS_25fps_1900K_short.WebM<pre>

Analyzing file:///home/root/big_buck_bunny_480p_VP8_VORBIS_25fps_1900K_short.WebM
Done discovering file:///home/root/big_buck_bunny_480p_VP8_VORBIS_25fps_1900K_short.WebM

Topology:
  container: video/webm{{av_ref_file}}
 Analyzing file://{{av_ref_file}}
 Done discovering file://{{av_ref_file}}

 Topology:
   container: video/webmaudio: audio/x-vorbis, channels=(int)2, rate=(int)4410048000, streamheader=(buffer)<>

      Tags:
        title: big_buck_bunny_480p_surround-fix.avi_041.AVI
        container format: Matroska
        language code: und
        application name: SUPER(C)   < 01766f7262697[...]
       Tags:
         container format: Matroska
         language code: en
         application name: Lavc56.60.100encoder: Xiph.Org libVorbis I 20070622
        encoder version: 0
        audio codec: Vorbis
        nominal bitrate: 80000
        bitrate: 80000

      Codec:20150105 (????)
         encoder version: 0
         audio codec: Vorbis
         nominal bitrate: 112000
         bitrate: 112000

       Codec:audio/x-vorbis, channels=(int)2, rate=(int)4410048000, streamheader=(buffer)<>
      Additional info:
        None
      Stream ID: b2ab3c289a804933c863327b88bbe3eac46bb36c16a173328c94e4928c7222ae/002:002
      Language: und
      Channels: 2
      Sample rate: 44100
      Depth: 32
      Bitrate: 80000
      Max bitrate: 0< 01766f72 [...]
     Additional info:
         None
       Stream ID: 18eb4f2d90d91d79f9bf3f9b9e41e785ee2cc1396d37b5ad127838437f6a3847/002:002
       Language: en
       Channels: 2 (front-left, front-right)
       Sample rate: 48000
       Depth: 32
       Bitrate: 112000
       Max bitrate: 0video: video/x-vp8, width=(int)854640, height=(int)480360, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)025/1 Tags:title: big_buck_bunny_480p_surround-fix.avi_041.AVI
        container format: Matroska container format: Matroskavideo codec: On2 VP8 language code: und

      Codec:en

       Codec:video/x-vp8, width=(int)854640, height=(int)480360, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)025/1 Additional info: None Stream ID: b2ab3c289a804933c863327b88bbe3eac46bb36c16a173328c94e4928c7222ae18eb4f2d90d91d79f9bf3f9b9e41e785ee2cc1396d37b5ad127838437f6a3847/001:001 Width: 854
      Height: 480
      Depth: 24
      Frame rate: 0/1640
       Height: 360
       Depth: 24
       Frame rate: 25/1Pixel aspect ratio: 1/1 Interlaced: false Bitrate: 0 Max bitrate: 0
Properties: Duration: 0:00:04.000000000
  Seekable: yes
  Tags: 
      title: big_buck_bunny_480p_surround-fix.avi_041.AVI
      container format: Matroska
      language code: und
      application name: SUPER(C)   04:02.413000000
   Seekable: yes
   Live: no
   Tags: 
       container format: Matroska
       video codec: On2 VP8
       language code: en
       application name: Lavc56.60.100encoder: Xiph.Org libVorbis I 20070622
      encoder version: 0
      audio codec: Vorbis
      nominal bitrate: 80000
      bitrate: 80000
      video codec: On2 VP8</pre>20150105 (????)
       encoder version: 0
       audio codec: Vorbis
       nominal bitrate: 112000
       bitrate: 112000
<noinclude>

{{PublicationRequestId | 7658 | 2018-06-11 | BrunoB}}
[[Category:GStreamer]]</noinclude>

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Difference between revisions of "Gst-discoverer"

1 Overview[edit]

2 Usage[edit]

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