File:Check64x48bwrg16pal 25fps.avi.026v10.stereo3levclicks.ogv

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Check64x48bwrg16pal_25fps.avi.026v10.stereo3levclicks.ogv ‎(Ogg multiplexed audio/video file, Theora/Vorbis, length 14 s, 64 × 48 pixels, 85 kbps overall, file size: 148 KB)

Captions

Captions

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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 stereo 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 (decibel figures are before normalisation):
0 seconds: left channel middle volume; right channel low
0.5 seconds: left channel 15 decibels quieter than at 0 seconds; right channel 8 decibels louder
1.0 seconds: left channel 8 decibels louder than at 0 seconds; right channel 15 decibels quieter
1.5 seconds: left channel 15 decibels quieter than at 0 seconds; right channel middle volume
2.0 seconds: left channel at middle volume; right channel 15 decibels quieter
and repeat from 0.5 seconds
Date
Source
English: self made in IrfanView 4.23, VirtualDub 1.9.8, ffmpeg2theora-0.26, Audacity 1.2.6 and oggz-tools

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 video and audio together was:

oggz-tools/oggz-merge.exe --output check64x48bwrg16pal_25fps.avi.026v10.stereo3levclicks.ogv check64x48bwrg16pal_25fps_noa12s.avi.026v10.ogv 120BPMclicktrack_3levelsdb0_-10_8_offsetstereonorm.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

File:check64x48bwrg16pal_25fps.avi.026v10.60BPMstereo3levclicks.ogv with 60 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

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Date/TimeThumbnailDimensionsUserComment
current00:02, 9 February 201014 s, 64 × 48 (148 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 stereo audio click track (30 clicks i

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Transcode status

Update transcode status
Format Bitrate Download Status Encode time
VP9 240P Not ready Unknown status
Streaming 240p (VP9) 7 kbps Completed 03:57, 6 December 2023 1.0 s
WebM 360P 325 kbps Completed 00:41, 30 November 2023 1.0 s
Streaming 144p (MJPEG) 243 kbps Completed 02:22, 2 November 2023 1.0 s
Stereo (Opus) 100 kbps Completed 08:16, 17 November 2023 1.0 s
Stereo (MP3) 129 kbps Completed 22:13, 31 October 2023 2.0 s

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