fakevideodec
The fake video decoder ignores input bitstream except
to enforce caps restrictions. It reads video width,
height and framerate from caps. Then it just pushes
video frames without doing any decoding. It can Also
handle raw frames decoding them as they come, faking
that it is decoding them.
When faking decoding encoded data, it draws a snake moving from left to right in the middle of the frame. This is a light weight drawing while it still provides an idea about how smooth is the rendering.
The fake video decoder inherits from GstVideoDecoder. It is useful to measure how smooth will be the whole rendering pipeline if you had the most efficient video decoder. Also useful to bisect issues for example when suspecting issues in a specific video decoder.
It is also useful to to use it to test the GstVideoDecoder base class.
Examples:
Fake decoding raw frames
$ gst-launch-1.0 videotestsrc ! fakevideodec ! videoconvert ! autovideosink
False decoding encoded framers
$ GST_PLUGIN_FEATURE_RANK=fakevideodec:1000 gst-launch-1.0 playbin3 uri=file:///path/to/video
Hierarchy
GObject ╰──GInitiallyUnowned ╰──GstObject ╰──GstElement ╰──GstVideoDecoder ╰──fakevideodec
Factory details
Authors: – Julien Isorce
Classification: – Codec/Decoder/Video
Rank – none
Plugin – basedebug
Package – GStreamer Base Plug-ins
Pad Templates
sink
video/x-h264:
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 1/1, 2147483647/1 ]
parsed: true
video/x-h263:
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 1/1, 2147483647/1 ]
parsed: true
video/x-theora:
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 1/1, 2147483647/1 ]
video/x-vp6:
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 1/1, 2147483647/1 ]
video/x-vp6-flash:
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 1/1, 2147483647/1 ]
video/x-vp8:
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 1/1, 2147483647/1 ]
video/x-vp9:
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 1/1, 2147483647/1 ]
video/x-divx:
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 1/1, 2147483647/1 ]
video/x-msmpeg:
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 1/1, 2147483647/1 ]
video/mpeg:
mpegversion: { (int)1, (int)2, (int)4 }
systemstream: false
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 1/1, 2147483647/1 ]
video/x-flash-video:
flvversion: 1
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 1/1, 2147483647/1 ]
video/x-raw:
format: { RGBA, RGBx, BGRA, BGRx, RGB16 }
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 1/1, 2147483647/1 ]
video/x-wmv:
wmvversion: { (int)1, (int)2, (int)3 }
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 1/1, 2147483647/1 ]
src
video/x-raw:
format: { RGBA, RGBx, BGRA, BGRx, RGB16 }
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 0/1, 2147483647/1 ]
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