The allrgb source returns frames of size 4096x4096 of all rgb colors.

The allyuv source returns frames of size 4096x4096 of all yuv colors.

The color source provides an uniformly colored input.

The colorchart source provides a colors checker chart.

The colorspectrum source provides a color spectrum input.

The haldclutsrc source provides an identity Hald CLUT. See also haldclut filter.

The nullsrc source returns unprocessed video frames. It is mainly useful to be employed in analysis / debugging tools, or as the source for filters which ignore the input data.

The pal75bars source generates a color bars pattern, based on EBU PAL recommendations with 75% color levels.

The pal100bars source generates a color bars pattern, based on EBU PAL recommendations with 100% color levels.

The rgbtestsrc source generates an RGB test pattern useful for detecting RGB vs BGR issues. You should see a red, green and blue stripe from top to bottom.

The smptebars source generates a color bars pattern, based on the SMPTE Engineering Guideline EG 1-1990.

The smptehdbars source generates a color bars pattern, based on the SMPTE RP 219-2002.

The testsrc source generates a test video pattern, showing a color pattern, a scrolling gradient and a timestamp. This is mainly intended for testing purposes.

The testsrc2 source is similar to testsrc, but supports more pixel formats instead of just rgb24. This allows using it as an input for other tests without requiring a format conversion.

The yuvtestsrc source generates an YUV test pattern. You should see a y, cb and cr stripe from top to bottom.

The sources accept the following parameters:

level

Specify the level of the Hald CLUT, only available in the haldclutsrc source. A level of N generates a picture of N*N*N by N*N*N pixels to be used as identity matrix for 3D lookup tables. Each component is coded on a 1/(N*N) scale.

color, c

Specify the color of the source, only available in the color source. For the syntax of this option, check the "Color" section in the ffmpeg-utils manual.

size, s

Specify the size of the sourced video. For the syntax of this option, check the "Video size" section in the ffmpeg-utils manual. The default value is 320x240.

This option is not available with the allrgb, allyuv, and haldclutsrc filters.

rate, r

Specify the frame rate of the sourced video, as the number of frames generated per second. It has to be a string in the format frame_rate_num/frame_rate_den, an integer number, a floating point number or a valid video frame rate abbreviation. The default value is "25".

duration, d

Set the duration of the sourced video. See the Time duration section in the ffmpeg-utils(1) manual for the accepted syntax.

If not specified, or the expressed duration is negative, the video is supposed to be generated forever.

Since the frame rate is used as time base, all frames including the last one will have their full duration. If the specified duration is not a multiple of the frame duration, it will be rounded up.

sar

Set the sample aspect ratio of the sourced video.

alpha

Specify the alpha (opacity) of the background, only available in the testsrc2 source. The value must be between 0 (fully transparent) and 255 (fully opaque, the default).

decimals, n

Set the number of decimals to show in the timestamp, only available in the testsrc source.

The displayed timestamp value will correspond to the original timestamp value multiplied by the power of 10 of the specified value. Default value is 0.

type

Set the type of the color spectrum, only available in the colorspectrum source. Can be one of the following:

• black
• white
• all

patch_size

Set patch size of single color patch, only available in the colorchart source. Default is 64x64.

preset

Set colorchecker colors preset, only available in the colorchart source.

Available values are:

• reference
• skintones

Default value is reference.