## ImageReader / ImageSource / ImageSourceAnim

`ImageReader` (string "file", int "start", int "end", float "fps", bool "use_DevIL", bool "info", string "pixel_type")
`ImageSource` (string "file", int "start", int "end", float "fps", bool "use_DevIL", bool "info", string "pixel_type")
`ImageSourceAnim` (string "file", float "fps", bool "info", string "pixel_type")

`ImageReader` is present in v2.52, it replaces WarpEnterprises' plugin, with some minor functionality changes. As of v2.55 `ImageSource` is equivalent, with some minor functionality changes. `ImageSource` is faster than `ImageReader` when importing one picture.

file: template for the image file(s), where frame number substitution can be specified using sprintf syntax. For example, the files written by `ImageWriter`'s default parameters can be referenced with `"c:\%06d.ebmp"`. As of v2.56 if the template points to a single file then that file is read once and subsequently returned for all requested frames.

start = 0, end = 1000: Specifies the starting and ending numbers used for filename generation. The file corresponding to start is always frame 0 in the clip, the file corresponding to end is frame (end-start). The resulting clip has (end-start+1) frames. 'end=0' does NOT mean 'no upper bound' as with ``ImageWriter``. The first file in the sequence, i.e., corresponding to 'start', MUST exist in order for clip parameters to be computed. Any missing files in the sequence are replaced with a blank frame.

fps = 24: frames per second of returned clip. An integer value prior to v2.55.

use_DevIL = false: When false, an attempt is made to parse (E)BMP files with the internal parser, upon failure (prior to v2.56) DevIL processing is invoked. When true, execution skips directly to DevIL processing. You should only need to use this if you have BMP files you don't want read by ``ImageReader``'s internal parser.

NOTE : DevIL version 1.6.6 as shipped with Avisynth does not correctly support DIB/BMP type files that use a pallette, these include 8 bit RGB, Monochrome, RLE8 and RLE4. Because the failure is usually catastrophic, from revision 2.56, internal BMP processing does not automatically fail over to DevIL processing. Forcing DevIL processing for these file types is currently not recommended.

info = false: when true, the source filename and DevIL version is written to each video frame (added in v2.55).

pixel_type = "rgb24": Allow the output pixel format to be specified, both rgb24 and rgb32 are supported. The alpha channel is loaded only for rgb32 and only if DevIL supports it for the loaded image format. (added in v2.56).

The resulting video clip colorspace is RGB if DevIL is used, otherwise it is whatever colorspace an EBMP sequence was written from (all AviSynth formats are supported).

Supported formats are:

- (e)bmp, dds, ebmp, jpg/jpe/jpeg, pal, pcx, png, pbm/pgm/ppm, raw, sgi/bw/rgb/rgba, tga, tif/tiff.
- gif, exr, jp2, psd, hdr. [all of them require 1.7.8 DevIL.dll]

`ImageSourceAnim` (added in v2.60; requires 1.7.8 DevIL.dll) lets you import animations (gif, ppm, tiff or psd). If there is a delay between the first and second image in the animation, the framerate is set accordingly. If this delay is zero, the framerate is set to 24 fps by default (and can be adjusted by setting the fps parameter). Note that pixel_type is set to RGB32 by default. If the images in the animation have unequal dimensions, then the dimension of the first image is taken and the remaining images are padded with black pixels below and or to the right.

1.7.8 DevIL.dll can be downloaded here. Just put the DevIL.dll in your system folder (it will overwrite the 1.6.6 DevIL.dll which comes with AviSynth). Be sure to use the non-unicode version, because the other one will result in crashes when loading pictures.

DevIL.dll 1.7.8 requires the 2005 VC runtime libraries to be correctly installed: Visual C++ 2005 SP1 Redistributable Package (x86).

    # Default parameters: read a 1000-frame native AviSynth EBMP sequence (at 24 fps)
    ImageSource()

    # Read files "100.jpeg" through "199.jpeg" into an NTSC clip
    ImageSource("%d.jpeg", 100, 199, 29.97)
    # Note: floating-point fps available in v2.56

    # Read files "00.bmp" through "50.bmp" bypassing AviSynth's internal BMP reader
    ImageSource("%02d.bmp", end = 50, use_DevIL = true)

    # Read a single image, repeat 300 times
    ImageSource("static.png", end = 300, use_DevIL=true)
    # Much, much faster in v2.56

    # Read a greyscale (8-bit) jpg:
    ImageSource("GoldPetals-8bit.jpg", use_DevIL=true)

    # Read a greyscale (8-bit) BMP (using AviSynth's internal BMP reader):
    ImageSource("GoldPetals-8bit.bmp")

    # Read a YV24 BMP (created with ImageWriter):
    ImageSource("GoldPetals-24bit.ebmp")

    # Use a still-frame image with audio:
    audio = DirectShowSource("Gina La Piana - Start Over.flv")
    video = ImageSource("Gina La Piana.jpg", fps=25, start=1, end=ceil(25*AudioLengthF(audio)/AudioRate(audio)))
    return AudioDub(video, audio)

    # Read an animation:
    ImageSourceAnim("F:\TestPics\8bit_animated.gif")

Notes:

- "EBMP" is an AviSynth extension of the standard Microsoft RIFF image format that allows you to save raw image data (all color formats are supported). See ImageWriter for more details.
- Greyscale BMPs are not read and written correctly by DevIL. They should be opened using use_DevIL=false.
- DevIL version 1.6.7 as shipped with AviSynth does not correctly support DIB/BMP type files that use a pallette, these include 8 bit RGB, Monochrome, RLE8 and RLE4. Loading those images requires DevIL version 1.7.8. (Because the failure is usually catastrophic, from revision v2.56, internal BMP processing does not automatically fail over to DevIL processing. Forcing DevIL processing with the shipped DevIL version for these file types is currently not recommended.)

Changes:

v2.60 | Added ImageSourceAnim.
v2.60 | Support user upgrade to 1.7.8 DevIL.dll (need to manage CRT dependancies). Palette and compressed bmp images load correctly now (issue 894702) [requires 1.7.8 DevIL.dll] Support for other formats like: gif, exr, jp2, psd, hdr [requires 1.7.8 DevIL.dll]
v2.60 | Opening greyscale images (as Y8) added; EBMP supports all color formats.

`$Date: 2012/10/10 13:41:51 $`