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Commons:Graphic Lab/Video and sound workshop

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Video and sound workshop

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This workshop is part of the Graphic Lab, a project aimed at picture retouching to improve the graphical content of the Wikimedia projects. More information about the lab can be found on its main page and requests pages (Illustrations ; Photographs ; Maps ; Video and Sound). To ask questions or make a suggestions, see the talk page of the graphic lab page.

This specific page is the requests page for the Video and Sound Workshop. Anyone can make a request for a video or sound to be improved. The standard format for making a request is shown below, along with general advice, and should be followed.

Make a request

Show manual procedures

Use the following template when making a new request, replacing the examples with your image(s) and request(s): 

<gallery>
 IMAGENAME.EXT|Description of image
 IMAGE#TWO.EXT|2nd image (If there is one)
 ETCETCETC.EXT|Don't request too many at once, though
</gallery>

;Request:
: Details of your request go here… --~~~~
;Graphist opinion(s):
▶ Make a new request ◀

See also

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 SpBot archives all sections tagged with {{Section resolved|1=~~~~}} after 7 days and sections whose most recent comment is older than 185 days. For the archive overview, see /Archive. The latest archive is located at /Archive/2025.

Rotate video without losing quality

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Request
This video was originally uploaded upside down. I tried to rotate this 180⁰, The file was rotated to current rotation but loses file size to almost half of what it was before. Can this be rotated from first revision to current position (180⁰) but without losing size.—KEmel49(📝,📤) 19:06, 11 September 2025 (UTC)[reply]
It's okay to see a file reduce in size; all modern video codecs are compressed with some degree of detail lost.
The only standard on quality is determined by your eyes: if it looks indistinguishable (or 'good enough') than the original file, then the file size doesn't matter. IrisChronomia (talk) 16:22, 16 September 2025 (UTC)[reply]
P.S. - generally speaking, you can spend more computational power to get a less lossy (more details preserved) video at the same size.
Spending 5 minutes compressing a 30-second video can yield a very small file with outstanding visual quality. A recording camera don't have that level of performance to spare, so they use minimal compression, relying on huge file sizes to preserve the details. IrisChronomia (talk) 16:28, 16 September 2025 (UTC)[reply]
@IrisChronomia, Now i got it why 1 minute of 30fps 720p recorded videos are 40 or 50 MB in my device. Probably need to compress externally.—KEmel49(📝,📤) 16:35, 16 September 2025 (UTC)[reply]
Graphist opinion(s)
@KEmel49: Can you try rotating it using http://ezgif.com/rotate-video? cmɢʟee ⋅τaʟκ 14:40, 12 September 2025 (UTC)[reply]
@Cmglee I tried withthe very first version, still lost size to half.—KEmel49(📝,📤) 13:09, 16 September 2025 (UTC)[reply]
It might be because the original was saved at an overly low compression for performance reasons. File:Canalul_Mila_35_video_02.webm also lost about half its size without perceptible quality loss. cmɢʟee ⋅τaʟκ 14:01, 16 September 2025 (UTC)[reply]
P.S. Asked on en:Wikipedia:Reference_desk/Computing#Rotating_and_saving_a_video_reduces_file_size_by_half cmɢʟee ⋅τaʟκ 14:14, 16 September 2025 (UTC)[reply]
@Cmglee I tried ezgif.com and it was 5.27 MB in size, i think current version is ok too (5.16 MB). Compression in size is not visible in video quality so let it be. BTW Thanks for your suggestion.—KEmel49(📝,📤) 15:08, 16 September 2025 (UTC)[reply]

Bird call drowned out by traffic noise

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  • Bird call drowned out by traffic noise

Article(s):

Request
Can the traffic noise be removed? - MPF (talk) 22:54, 21 October 2025 (UTC)[reply]
Graphist opinion(s)


Please convert MP4 to AV1 webm just under 100 MiB

[edit]
File:Sp_illum_10deg_2025_1080p30.webm

Article(s):

Request
To illustrate lunar south pole illumination, I found this NASA simulation at http://svs.gsfc.nasa.gov/5027. As MP4 format is unacceptable, I converted it to VP9 webm with 
ffmpeg -y -i sp_illum_10deg_2025_1080p30.mp4 -vf "setpts=2.5*PTS" -r 12 -c:v libvpx-vp9 -crf 37 sp_illum_10deg_2025_1080p30.webm
(37 was the lowest crf yielding a file under 100 mebibytes, Wikimedia Commons' upload limit for subsequent versions).
I would've preferred the AV1 codec as one gets higher video quality for the same filesize, but when I replaced libvpx-vp9 with libaom-av1 in the command above, I got Overriding packet duration by frame rate, this should not happen errors.
Can someone please convert the original MP4 to an AV1 webm at 12 frames per second (so that the animation runs at 1 day per second) at the lowest crf setting (i.e. highest quality) that makes the file under 100 MiB?
Thanks, cmɢʟee ⋅τaʟκ 13:03, 2 November 2025 (UTC)[reply]
Resolved
Thanks to JayCubby (talk · contribs) who did it as per user_talk:JayCubby#File:Sp_illum_10deg_2025_1080p30.webm. cmɢʟee ⋅τaʟκ 17:00, 6 November 2025 (UTC)[reply]
Always happy to help! JayCubby (talk) 17:01, 6 November 2025 (UTC)[reply]
Graphist opinion(s)


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