NVIDIA VPI GStreamer Plug-in/Examples/Videoscale: Difference between revisions
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The '''vpivideoscale''' element applies the [https://docs.nvidia.com/vpi/algo_rescale.html| Rescale algorithm] in order to rescale video from one resolution to another using VPI. | The '''vpivideoscale''' element applies the [https://docs.nvidia.com/vpi/algo_rescale.html| Rescale algorithm] in order to rescale video from one resolution to another using VPI. | ||
== Element properties == | == Videoscale Element properties == | ||
* '''backend'''<br/> | * '''backend'''<br/> | ||
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Default: "zero"<br/> | Default: "zero"<br/> | ||
== Example == | == NVIDIA VPI GStreamer Plug-in Videoscale Example == | ||
The following example pipe will help you rescale the input video stream from 1080P to 720P. You may modify the properties values according to the information above. | The following example pipe will help you rescale the input video stream from 1080P to 720P. You may modify the properties values according to the information above. | ||
< | *Unified memory | ||
gst-launch-1.0 videotestsrc is-live=true ! video/x-raw,width=1920,height=1080 ! vpiupload ! vpivideoscale ! video/x-raw(memory:VPIImage),width=1280,height=720 ! vpidownload ! fakesink | <syntaxhighlight lang="bash"> | ||
</ | gst-launch-1.0 videotestsrc is-live=true ! video/x-raw,width=1920,height=1080 ! vpiupload ! vpivideoscale ! "video/x-raw(memory:VPIImage),width=1280,height=720" ! vpidownload ! fakesink | ||
</syntaxhighlight> | |||
*NVMM memory | |||
<syntaxhighlight lang="bash"> | |||
gst-launch-1.0 videotestsrc is-live=true ! nvvidconv bl-output=false ! video/x-raw(memory:NVMM),width=1920,height=1080 ! vpiupload ! vpivideoscale ! "video/x-raw(memory:VPIImage),width=1280,height=720" ! vpidownload ! fakesink | |||
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{{NVIDIA VPI GStreamer Plug-in/Foot|Examples/Videoconvert|Examples/Convolution }} | {{NVIDIA VPI GStreamer Plug-in/Foot|Examples/Videoconvert|Examples/Convolution }} | ||
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Latest revision as of 17:41, 8 May 2024
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Introduction
The vpivideoscale element applies the Rescale algorithm in order to rescale video from one resolution to another using VPI.
Videoscale Element properties
- backend
Backend to use to execute VPI algorithms. Available options:
- cpu: CPU backend
- cuda: CUDA backend
- pva: PVA backend (Xavier only)
- vic: VIC backend
Flags: readable, writable
Default: "cuda"
- interpolator
Interpolation method to be used. Available options:
- nearest: Nearest neighbor interpolation
- linear: Fast linear interpolation
- catmull: Fast Catmull-Ron cubic interpolation
Flags: readable, writable
Default: linear
- boundary
How pixel values outside of the image domain should be treated. Available options:
- zero: All pixels outside the image are considered 0
- clamp: Border pixels are repeated indefinitely
- reflect: Pixels are reflected like this edcba|abcde|edcba
- mirror: Pixels are mirrored like this dedcb|abcde|dcbab
Flags: readable, writable
Default: "zero"
NVIDIA VPI GStreamer Plug-in Videoscale Example
The following example pipe will help you rescale the input video stream from 1080P to 720P. You may modify the properties values according to the information above.
- Unified memory
gst-launch-1.0 videotestsrc is-live=true ! video/x-raw,width=1920,height=1080 ! vpiupload ! vpivideoscale ! "video/x-raw(memory:VPIImage),width=1280,height=720" ! vpidownload ! fakesink
- NVMM memory
gst-launch-1.0 videotestsrc is-live=true ! nvvidconv bl-output=false ! video/x-raw(memory:NVMM),width=1920,height=1080 ! vpiupload ! vpivideoscale ! "video/x-raw(memory:VPIImage),width=1280,height=720" ! vpidownload ! fakesink