vapoursynth-rawz 1.0

A raw source filter for VapourSynth

Description

Raw video reader library and VapourSynth frontend.

VapourSynth Usage

rawz.Source(string source, int "width", int "height", int "format",
  string "packing", string "offset", int "alignment", int "y4m",
  bint "alpha", int "fpsnum", int "fpsden", int "sarnum", int "sarden")

Parameters:

source

Path to raw file. If the path ends with “.y4m”, it will be processed as a YUV4MPEG2 (Y4M) file. For Y4M files, no other parameters are required.

width

Width of luma plane. The VapourSynth clip will be rounded-up to the nearest multiple of the chroma subsampling ratio. For example, a 639x479 (4:2:0) source will produce a 640x480 clip. The padding pixels contain uninitialized values.

Ignored for Y4M files. Required for other files.

height

Height of luma plane.

Ignored for Y4M files. Required for other files.

format

VapourSynth format ID corresponding to the raw format. For interleaved raws, the format corresponds to the de-interleaved planar data.

Ignored for Y4M files. Required for other files.

packing

Interleaving format. Takes precedence over the specified VapourSynth format in case of conflict. If not specified, the input is assumed to be planar.

Supported packing modes:

• argb: 32 or 64-bit word with 8 or 16-bit elements, with alpha channel in MSB

• rgba: Same as argb, but with alpha channel in LSB

• rgb: 24 or 48-bit packed word. Channel order R-G-B

• rgb30: D3D11 A2R10G10B10 bitfields

• nv: Biplanar with interleaved chroma samples

• yuyv: 4:2:2 packing with sample sequence (byte-wise) Y-U-Y-V

• uyvy: Same as yuyv, but with alternate sequence U-Y-V-Y

• v210: ProRes v210

Ignored for Y4M files.

offset

Offset to video data within file. This can be used to read pixel data from image formats such as BMP, EXR, TIFF, etc.

alignment

Log2 alignment for scanline. For example, BMP files are 4-byte aligned, so the appropriate value would be 2. v210 alignment is handled automatically.

y4m

Y4M handling mode:

• -1: Disable Y4M

• 0: Detected Y4M based on file extension (default)

• 1: Force Y4M

alpha

If true, the alpha plane (e.g. argb, rgba, rgb30) is returned as an embedded video frame (_Alpha).

Default: false

fpsnum

Framerate numerator. Overridden by embedded Y4M metadata.

Default: 25

fpsden

Framerate denominator.

Default: 1

sarnum:

Sample aspect ratio numerator. Overridden by embedded Y4M metadata.

Default: 0 (undefined)

sarden:

SAR denominator.

Default: 0

Other remarks:

If the source has an alternative channel order (e.g. BGR, GBR), use std.ShufflePlanes after loading the raw:

# GBRP file
c = core.rawz.Source('myfile.bin', width=1, height=1, format=vs.RGB24)
c = core.std.ShufflePlanes(c, [2, 0, 1], vs.RGB)

If the source pixel values need some other adjustment (e.g. endianness or mixed-depth), use std.Lut:

# Big-endian RGBP file
c = core.rawz.Source('myfile.bin', width=1, height=1, format=vs.RGB48)
c = core.std.Lut(c, function=lambda x: int(x >> 8) | ((x & 0xFF) << 8))
c = core.std.ShufflePlanes(c, [2, 0, 1], vs.RGB)

# 2-bit alpha from A2R10G10B10 file
c = core.rawz.Source('myfile.bin', width=1, height=1, format=vs.RGB30, packing='rgb30')
a = core.std.PropToClip(c)
a = core.std.Lut(a, function=lambda x: min(x * 65535 / 3, 65535))

Compilation

Be sure to fetch the submodules with git submodules update –init.

Use the Makefile.