File:Check64x48bwrg16pal 25fps.avi.026v10.mono3levclicks.ogv

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Check64x48bwrg16pal_25fps.avi.026v10.mono3levclicks.ogv (Ogg multiplexed audio/video file, Theora/Vorbis, length 15 s, 64 × 48 pixels, 42 kbps overall, file size: 77 KB)

Captions

Captions

Add a one-line explanation of what this file represents
Description
English: Calibration audio video of four differently coloured 64x48 pixel sized frames in groups of 25, repeated to make 350 frames in total displayed in 14 seconds with a 120 beats per minute mono audio click track (30 clicks in total). 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
... and repeating from frame 1 until 14 seconds have elapsed

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. The media player should also play all 30 clicks from the audio click track as follows:
0 seconds: click at middle volume
0.5 seconds: click 10 decibels quieter than at 0 seconds
1.0 seconds: click 8 decibels louder than at 0 seconds
1.5 seconds: click 10 decibels quieter than at 0 seconds
2.0 seconds: click at middle volume, and repeat from 0.5 seconds
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 oggz-tools command used to merge the videi and audio together was:

oggz-tools/oggz-merge.exe --output check64x48bwrg16pal_25fps.avi.026v10.mono3levclicks.ogv check64x48bwrg16pal_25fps_noa12s.avi.026v10.ogv 120BPMclicktrack_3levelsdb0_-10_8_aligned.ogg This file was derived from:

Author 84user
Other versions

inline black, white, red, green

inline green, black, white, red

inline green, red, black, white

inline green, black, white, red

File:Check64x48bwrg16pal 25fps noaudio.avi.026v10.ogv 4 second version


File:check64x48bwrg16pal_25fps.avi.026v10.mono3levclicks.ogv with 120 beats per minute click track

with 120 beats per minute stereo click track

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

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current23:17, 8 February 201015 s, 64 × 48 (77 KB)84user (talk | contribs){{Information |Description={{en|1=Calibration audio video of four differently coloured 64x48 pixel sized frames in groups of 25, repeated to make 350 frames in total displayed in 14 seconds with a 120 beats per minute audio click track (30 clicks in total

You cannot overwrite this file.

Transcode status

Update transcode status
Format Bitrate Download Status Encode time
VP9 240P Not ready Error on 09:06, 6 July 2024
WebM 360P 325 kbps Completed 00:41, 30 November 2023 2.0 s
QuickTime 144p (MJPEG) 185 kbps Completed 14:27, 19 October 2024 1.0 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.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Check64x48bwrg16pal_25fps.avi.026v10.mono3levclicks.ogv&oldid=855228036"