![recompress all frames recompress all frames](https://ellasbubbles.com/wp-content/uploads/2021/09/Bathtub_Seat_Pillow_Flat_Top_Down_Door_Open_Whiteout-1024x1024.jpg)
This is great if you want to slim down the storage situation, but it doesn’t really tell us much about the initial recordings. Then he converted them to H.264 files at varying bit rates, and looked at the how the PSNR and SSIM related ot the already compressed MJPEG files.įundamentally what he was asking is, what bitrate one needs H.264 to run at to recompress already lossy compressed MJPEG files without loosing too much quality. In his testing, he shot some 4K test videos with his 5D4.
![recompress all frames recompress all frames](http://blog.caitlinwilson.com/wp-content/uploads/blogger/-xsxBdHoP0uU/Tc25Qm07K_I/AAAAAAAAEsQ/-Eqp_ErvGG0/s1600/FDN412-G.jpeg)
Though his test isn’t really all that useful either, at least in my opinion. A lot of the discussion is focused on security cameras and generally low bit rates, not cameras and really high bitrates.Ībout the only reasonably close article was one by Thomas Skowron. The funny thing is that if you google around for information comparing MJPEG to H.264 it’s actually rather hard to find useful information.
![recompress all frames recompress all frames](https://www.scooterhelp.com/tips/engine/_sf.clutch/sf.clutch31.jpg)
I mean using a less efficient codec should mean you need more bits to get the same image quality. The conventional wisdom, all be it paraphrased, has been that this super high bitrate was chosen since it was necessary to make the less efficient MJPEG codec produce a usable quality file.Īt first blush, this sounds completely reasonable. Both the 5D mark IV and 1DX Mark II use Motion JPEG (MJEPG) compression for their 4K video streams.