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1 Overview
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
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
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)
encoder: Xiph.Org libVorbis I 20070622
encoder version: 0
audio codec: Vorbis
nominal bitrate: 80000
bitrate: 80000
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
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
audio: audio/x-vorbis, channels=(int)2, rate=(int)44100, streamheader=(buffer)<>
Tags:
title: big_buck_bunny_480p_surround-fix.avi_041.AVI
container format: Matroska
language code: und
application name: SUPER(C)
encoder: Xiph.Org libVorbis I 20070622
encoder version: 0
audio codec: Vorbis
nominal bitrate: 80000
bitrate: 80000
Codec:
audio/x-vorbis, channels=(int)2, rate=(int)44100, streamheader=(buffer)<>
Additional info:
None
Stream ID: b2ab3c289a804933c863327b88bbe3eac46bb36c16a173328c94e4928c7222ae/002:002
Language: und
Channels: 2
Sample rate: 44100
Depth: 32
Bitrate: 80000
Max bitrate: 0
video: video/x-vp8, width=(int)854, height=(int)480, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)0/1
Tags:
title: big_buck_bunny_480p_surround-fix.avi_041.AVI
container format: Matroska
video codec: On2 VP8
language code: und
Codec:
video/x-vp8, width=(int)854, height=(int)480, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)0/1
Additional info:
None
Stream ID: b2ab3c289a804933c863327b88bbe3eac46bb36c16a173328c94e4928c7222ae/001:001
Width: 854
Height: 480
Depth: 24
Frame rate: 0/1
Pixel 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)
encoder: Xiph.Org libVorbis I 20070622
encoder version: 0
audio codec: Vorbis
nominal bitrate: 80000
bitrate: 80000
video codec: On2 VP8