# cudascale

This element resizes video frames. By default the element will try to negotiate to the same size on the source and sinkpad so that no scaling is needed. It is therefore safe to insert this element in a pipeline to get more robust behaviour without any cost if no scaling is needed.

This element supports some YUV formats which are are also supported by nvidia encoders and decoders.

## Example pipelines

     gst-launch-1.0 -v filesrc location=videotestsrc.mp4 ! qtdemux ! h264parse ! nvh264dec ! cudaconvert ! cudascale ! cudaconvert ! cudadownload ! autovideosink

Decode a mp4/h264 and display the video. If the video sink chosen cannot perform scaling, the video scaling will be performed by cudascale

     gst-launch-1.0 -v filesrc location=videotestsrc.mp4 ! qtdemux ! h264parse ! nvh264dec ! cudaconvert ! cudascale ! cudaconvert ! cudadownload ! video/x-raw,width=100 ! autovideosink

Decode an mp4/h264 and display the video with a width of 100.

## Hierarchy

    GObject
        ╰──GInitiallyUnowned
            ╰──GstObject
                ╰──GstElement
                    ╰──GstBaseTransform
                        ╰──GstCudaBaseTransform
                            ╰──GstCudaBaseFilter
                                ╰──cudascale

## Factory details

Authors: – Seungha Yang

Classification: – `Filter/Converter/Video/Scaler/Hardware`

Rank – none

Plugin – nvcodec

Package – GStreamer Bad Plug-ins

## Pad Templates

### `sink`

    video/x-raw(memory:CUDAMemory):
             format: { I420, YV12, NV12, NV21, P010_10LE, P016_LE, I420_10LE, Y444, Y444_16LE, BGRA, RGBA, RGBx, BGRx, ARGB, ABGR, RGB, BGR, BGR10A2_LE, RGB10A2_LE }
              width: [ 1, 2147483647 ]
             height: [ 1, 2147483647 ]
          framerate: [ 0/1, 2147483647/1 ]

Presence – always

Direction – sink

Object type – GstPad

### `src`

    video/x-raw(memory:CUDAMemory):
             format: { I420, YV12, NV12, NV21, P010_10LE, P016_LE, I420_10LE, Y444, Y444_16LE, BGRA, RGBA, RGBx, BGRx, ARGB, ABGR, RGB, BGR, BGR10A2_LE, RGB10A2_LE }
              width: [ 1, 2147483647 ]
             height: [ 1, 2147483647 ]
          framerate: [ 0/1, 2147483647/1 ]

Presence – always

Direction – src

Object type – GstPad

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