File:Check64x48bwrg16pal 25fps noaudio.avi.026v10.ogv

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Check64x48bwrg16pal_25fps_noaudio.avi.026v10.ogv (Ogg Theora video file, length 4.0 s, 64 × 48 pixels, 8 kbps, file size: 4 KB)

Captions

Captions

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Description
English: Calibration video of four differently coloured 64x48 pixel sized frames in groups of 25, making 100 frames in total displayed in four seconds. Each unique frame uses a 4 bit colour palette and contains four coloured rectangles in a checkerboard pattern. Each subsequent sequence of 25 frames the previous sequence's colours rotated 90 degrees clockwise.

inline Frames 1 to 25: black, white, red, green

inline Frames 26 to 50: green, black, white, red

inline Frames 51 to 75: green, red, black, white

inline Frames 76 to 100: green, black, white, red

English: This OGV file is intentionally made at 64 pixels wide by 48 pixels high and with a 4 bit colour palette in order to test media players. A correct media player with all post-processing disabled should play frames 1 to 25 over one second and then frames 26 to 50 for the next second and so on. Each coloured rectangle should appear completely black, completely white, completely red or completely green, and all edges should be sharp.
Date
Source
English: self made in IrfanView 4.23, VirtualDub 1.9.8 and ffmpeg2theora-0.26

7Zip compressed archives of the source PNG files and intermediate AVI file are at [1] and [2] (7Zip decompressor needed).

The ffmpeg2theora command used to convert the AVI to this OGV file was:

ffmpeg2theora-0.26.exe --videoquality 10 check64x48bwrg16pal_25fps_noaudio.avi --output check64x48bwrg16pal_25fps_noaudio.avi.026v10.ogg 

 Duration: 00:00:04.00, start: 0.000000, bitrate: 2478 kb/s
   Stream #0.0: Video: rawvideo, bgra, 64x48, 25 tbr, 25 tbn, 25 tbc

 0:00:04.00 audio: 0kbps video: 1kbps, time elapsed: 00:00:00
Author 84user
Other versions

Derivative works of this file:  Check64x48bwrg16pal 25fps noaudio.avi.026v10 ogv.gif inline a GIF version that MPlayer created from this OGV

inline black, white, red, green

inline green, black, white, red

inline green, red, black, white

inline green, black, white, red

File:check64x48bwrg16pal_25fps_noa12s.avi.026v10.ogv 14 second version

inline File:2x2Checkerboardbw16pixels.png frame 1 before upscaling to 64:48

inline File:2x2Checkerboardwb16pixels.png frame 2 before upscaling to 64:48

a smaller square aspect AVI video converted by VLC
inline

<-- left: rendered at the original size of 64 pixels; right: rendered at 128 pixels -->


Public domain This image of simple geometry is ineligible for copyright and therefore in the public domain, because it consists entirely of information that is common property and contains no original authorship.
Heptagon
Heptagon

File history

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Date/TimeThumbnailDimensionsUserComment
current21:12, 8 February 20104.0 s, 64 × 48 (4 KB)84user (talk | contribs){{Information |Description={{en|1=Calibration video of four differently coloured 64x48 pixel sized frames in groups of 25, making 100 frames in total displayed in four seconds. Each unique frame uses a 4 bit colour palette and contains four coloured recta

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Transcode status

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Format Bitrate Download Status Encode time
VP9 240P 2 kbps Completed 19:16, 14 June 2024 0.0 s
WebM 360P 2 kbps Completed 00:41, 30 November 2023 1.0 s
QuickTime 144p (MJPEG) 58 kbps Completed 14:28, 19 October 2024 0.0 s

Metadata

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

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