Elecard HEVC Video Decoder

Elecard HEVC Video Decoder is a GStreamer plugin for decoding H.265/HEVC (ISO/IEC 23008-2 MPEG-H Part 2/ITU-T H.265) streams.

Features

Elecard HEVC Video Decoder has the following features:

  • Supports multiple chroma format conversion settings;

  • Provides three frame decoding modes: all frames, only reference frames, only key frames;

  • Supports two deinterlacing methods: the fast Bob algorithm and the Advanced space-time algorithm.

Parameter Description

Below is the table describing Elecard HEVC Video Decoder parameters and their values:

Parameter Name

Description

Value Type

Available Values [range]

Default

Flags

analyzer-enable

Enables or disables the input stream analysis prior to decoding.

Boolean

True, False

False

readable, writable

crop

Specifies the initial coordinates and size of the required frame after cropping. Format: LEFT, TOP, WIDTH, HEIGHT. For example, the 0,0,1920,1080 value means the image is cropped with the left top corner at point (0, 0) and the size of 1920x1080 pixels.

String

0,0,0,0

readable, writable

crop-h

Specifies the picture cropping height. The positive value sets the cropping height, while the negative value sets the vertical offset relative to the right bottom corner of the source picture.

Integer

[-16384 – 16384]

0

readable, writable

crop-w

Specifies the picture cropping width. The positive value sets the cropping width, while the negative value sets the horizontal offset relative to the right bottom corner of the source picture.

Integer

[-16384 – 16384]

0

readable, writable

crop-x

Specifies the picture cropping parameters. Sets the top left corner coordinates (CropTop: x) relative to the source picture.

Integer

[0 – 16384]

0

readable, writable

crop-y

Specifies the picture cropping parameters. Sets the top left corner coordinates (CropLeft: y) relative to the source picture.

Integer

[0 – 16384]

0

readable, writable

csc

Specifies the chroma format conversion and bit depth setting.

Enum
0 — Auto
-1073731448 — YUV420, 8 bit, planar
-1073600376 — YV12, 4:2:0, 8 bit, planar
-1073723256 — YUV422, 8 bit, planar
-1073715064 — YUV444, 8 bit, planar
-1073198968 — YUY2, 4:2:2, 8 bi, Y-U-Y-V
-1072936824 — UYVY, 4:2:2, 8 bit, U-Y-V-Y
-1073067896 — YVYU, 4:2:2, 8 bit, Y-V-Y-U
-1073469304 — NV12, 4:2:0, 8 bit, semi-planar
-1073338232 — NV21, 4:2:2, 8 bit, semi-planar
-1073739640 — YUV400, 8 bit, monochrome
-1073731318 — YUV420, 10 bit, planar
-1073723126 — YUV422, 10 bit, planar
-1073714934 — YUV444, 10 bit, planar
-939251446 — P010, 4:2:0, 10 bit, semi-planar
-1072674806 — V210, 4:2:2, 10 bit, V-Y-U-Y
-1071978360 — BGR, 8 bit, B-G-R
-1071716216 — BGR0, 8 bit, B-G-R-0
-1071650680 — BGRA, 8 bit, B-G-R-A

0

readable, writable

decode-mode

Specifies the video decode mode. Available modes:

  • all — all frames (I/P/B) in the stream are decoded;

  • ref — only reference frames (I/P) are decoded, B-frames are skipped;

  • key — only key frames (I) are decoded.

Enum
0 — all
2 — ref
3 — key

0

readable, writable

deinterlace

Specifies the deinterlacing operation mode. In the On mode, the deinterlacing is always enabled, in the Off mode — always disabled. In the Auto mode, the deinterlacing is applied only to interlaced frames.

Enum
0 — Off
1 — On
2 — Auto

0

readable, writable

deinterlace-method

Specifies the deinterlacing method. Available methods:

  • BOB — the fast Bob algorithm that vertically scales the original frame field to a complete frame;

  • Advanced — a high-quality space-time algorithm that uses adaptive algorithms to process each frame area.

Enum
1 — BOB
2 — Advanced

1

readable, writable

double-rate

Enables or disables the frame rate doubling mode during deinterlacing by transforming each field into a complete frame.

Boolean

True, False

False

readable, writable

error-concealment

Specifies the operation mode for handling corrupted frames. Available modes:

  • off — show all frames, including the corrupted ones;

  • skip — don’t show corrupted frames;

  • restore — restore corrupted frames.

Enum
0 — off
1 — skip
2 — restore

0

readable, writable

fps

Indicates the current FPS.

Double

[0 – 1.797693e+308]

-nan(ind)

readable

framerate

Specifies the frame rate of the output.

Double

[0 – 500]

0

readable, writable

frames-decoded

Indicates the number of decoded frames.

Unsigned Integer64

[0 – 18446744073709551615]

0

readable

license-state

Indicates the license state.

String

evaluation

readable

name

Specifies the name of the object.

String

ehevcdec0

readable, writable

num-threads

Specifies the number of threads the decoder will create to parallelize the decoding process. The upper range boundary depends on the number of logical CPU cores on a given machine. If the value is set to 0, the decoder determines the number of threads automatically.

Unsigned Integer

[0 – 32]

0

readable, writable

oem-name

Indicates the OEM name.

String

readable

parent

Specifies the parent of the object.

Object of type GstObject

readable, writable

resize

Specifies the output picture size. If changing picture height is not required, set the parameter to 0x0.

String

0x0

readable, writable

resize-h

Specifies the output picture height. If changing picture height is not required, set the parameter to 0.

Integer

[0 – 16384]

0

readable, writable

resize-w

Specifies the output picture width. If changing picture width is not required, set the parameter to 0.

Integer

[0 – 16384]

0

readable, writable

thumbnails-period

The minimum time between two consecutively decoded thumbnails (in seconds).

Integer

[0 – 2147483647]

0

readable, writable