I am editing some videos that have same qualities. I want to keep the quality. Not less or not more. Is that possible?
The original bitrate is 4772 but when I export it changes to larger or lower bitrate with changing encoder speed. And exported file size changes too. Here is my export settings.
Version: kdenlive-24.08.2_standalone
Try a lossless encoder profile, or create your own specifically for that purpose with your desired bit rate.
I also tried Losless/H264 choice, but the bitrate increased to 39888 and average 8 minute video size increased to 2,43 GB. How it does, the base video is 18 minute and its size is 600 MB.
I think you’re confusing a few different things - you’re asking about maintaining quality, but complaining that the bitrate and/or file size changes after editing …
The bitrate needed for a given quality will entirely depend on the content, and the filesize will entirely depend on the length of the content and the bitrates needed to encode each frame of it.
You either need to select the quality you want based on the visual appearance of the result, or the bitrate you want based on the size of the file you are willing to accept (or the bandwidth of what you want to stream it over in real time).
You can’t directly select both, and can only improve both together by using a better codec or more expensive encoding options. As soon as you do any editing you’re no longer going to get the same result, even using the same encoder.
The only way to get “exactly” the same quality is to use lossless cutting, which greatly limits the sort of “editing” you can do other than trimming and concatenating clips without any transitions.
Put simply, lossless requires heaps of space. It’s like saving JPEG source files to PNG or TIFF after editing: they will be bigger but you’ll avoid another lossy re-encode. Your source file is probably encoded with a lossy codec, which keeps things reasonable. If you want to avoid another generation of (lossy) quality loss, it costs you (space-wise, bandwidth-wise). Unless you absolutely require no quality losses, you can make things look very similar or the same to most people who watch your video, with a bit of trial-and-error trying various (lossy) bitrates.
