1. Overview[edit | edit source]
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 | edit source]
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 /usr/local/demo/media/ST2297_visionv3.webm Analyzing file:///usr/local/demo/media/ST2297_visionv3.webm Done discovering file:///usr/local/demo/media/ST2297_visionv3.webm 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: Lavc56.60.100 encoder: Xiph.Org libVorbis I 20150105 (????) encoder version: 0 audio codec: Vorbis nominal bitrate: 112000 bitrate: 112000 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 /usr/local/demo/media/ST2297_visionv3.webm Analyzing file:///usr/local/demo/media/ST2297_visionv3.webm Done discovering file:///usr/local/demo/media/ST2297_visionv3.webm Topology: container: video/webm audio: audio/x-vorbis, channels=(int)2, rate=(int)48000, streamheader=(buffer)< 01766f7262697[...] Tags: container format: Matroska language code: en application name: Lavc56.60.100 encoder: Xiph.Org libVorbis I 20150105 (????) encoder version: 0 audio codec: Vorbis nominal bitrate: 112000 bitrate: 112000 Codec: audio/x-vorbis, channels=(int)2, rate=(int)48000, streamheader=(buffer)< 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: 0 video: video/x-vp8, width=(int)640, height=(int)360, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1 Tags: container format: Matroska video codec: On2 VP8 language code: en Codec: video/x-vp8, width=(int)640, height=(int)360, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1 Additional info: None Stream ID: 18eb4f2d90d91d79f9bf3f9b9e41e785ee2cc1396d37b5ad127838437f6a3847/001:001 Width: 640 Height: 360 Depth: 24 Frame rate: 25/1 Pixel aspect ratio: 1/1 Interlaced: false Bitrate: 0 Max bitrate: 0 Properties: Duration: 0:04:02.413000000 Seekable: yes Live: no Tags: container format: Matroska video codec: On2 VP8 language code: en application name: Lavc56.60.100 encoder: Xiph.Org libVorbis I 20150105 (????) encoder version: 0 audio codec: Vorbis nominal bitrate: 112000 bitrate: 112000