## Youtube allow us to download only mp4 and the quality is garbage
Install ffmpeg on you host
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First pixel is the number of values valid on the last chunk for exemple if the last chunk is [12,34] the first pixel value would be [2,2,2]
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Second pixel is the full height of the valid pixels on the last page so max is MAX_HEIGHT format being "258fff" = 258 pixels
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Third pixel is the Number of pixels valid on the last line the format being "85ffff" = 85 pixels
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The pixel number 4 is the number of char on the filename and the valid char on the last pixels before the data exemple:
- "file.pdf" => "66696c652e706466" => split by 6 => ["66696c","652e70","6466"] => pixel n°4 = (8,0,0) => like (filename.len(), 0, 0)
- On the decoder, we will be able to know that the next (
8* 2 = 16) => 16 / 6 = 2.6666 => ceil(2.6666) => 3 so the next 3 pixels are the filename
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The filename.len() must be < 255 the filename will be cropped from the start to avoid losing the extension
To create the video this command seems nice. Mp4 is a shit format.
The avi format seems to keep the valid colors
ffmpeg -framerate 1 -i result%03d.png -c:v ffv1 output.avi
To extract images from the video this command seems nice
ffmpeg -i output.avi -c:v png -r 1 output%03d.png
Check if after an upload on youtube and a download, the colors are still valid.