I was on fight porn just now and saw the post about a bully getting served. The top comment is asking why fights are always filmed with blurry plastic over the camera lens, and another guy commented that it was 1080p when he first saw the video, and it’s been copied so much the video quality goes down, so it made me curious. Can anyone answer this?
In: Technology
So there’s that guy on yt who uploaded and downloaded and reuploaded the same file 1000 times back in the 2010s, and a few weeks ago, anoter high end channel redid the thing.
Basically, when you upload a file, to make it easier to broadcast, it will be scanned frame by frame to find differences, which will be run through a compression algorithm. If there is no movement, like in a room with a wall behind, the compiler will not even bother to assign extra bits from the total bitrate to the non-moving things, just copying that part of the frame as much as possible.
Basically, the more you uploaded the same file, the more will the computer try to even pixels put and reduce video complexity to save spacr and load on the server.
Loaded question. Depends on how it was copied and reuploaded. If you can get the original source then it should be an exact copy. If it was ripped another way there can be quality loss. You can also reupload it at lower quality just because of things such as the uploader may have poor upload rates and was impatient so reduced quality to lower upload size, or perhaps they are inexperienced etc etc.
1080p takes a lot of bytes to store and share over the Internet. Youtube and other sites often recode the video to a lower resolution so that it plays without those annoying “buffering” delays on your smartphone. If it was a true digital copy, it would be the same.
If the source file is copied, then you won’t see any video degradation. However, what usually happens is that a video is uploaded and then compressed by the video hosting site. The downloaded video is then re-uploaded and _re-compressed_ by the video hosting site again, and the process repeats every time it is uploaded.
Every time a video is compressed, it loses a little bit of information. Do this enough times and the quality seriously degrades.
Each time someone downloads the video it gets compressed in order to save on bandwith and storage, so its not an exact copy each time its downloaded
Video compression is usually lossy, which means the compression algorithm discards information in order to save file space. The goal is to reduce the size of the file as much as possible with minimal loss of visual quality.
If the same file is repeatedly compressed over and over again, this loss of information can become severe, a phenomenon known as generation loss.
If the video file is copied bit for bit then there is no loss of quality – it’s only if the video file is re-encoded each time that this happens.
It doesn’t go down when copied. It goes down when compressed, which is often done by video hosting sites to reduce upload, storage and download costs/resources/time.
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