Improve aria2 progress report

[Douile]

Feature request

• [ ] This feature I'm requesting is already implemented in yt-dlp.
• [x] This feature is merely a UI/UX update.
• [ ] This feature is suitable for primary users with little knowledge about yt-dlp.
• [ ] This feature is available for most websites, not only the video platform I use.
• [ ] This feature is not going to conflict with many of the existing options.

Description

When downloading videos with multiple parts (e.g. video+audio) with aria2 the progress meter skips forward and backwards: reaches 100%, goes back to 0 etc. This is because the meter percent seems to be based on the percent reported in each line of output, but in the mentioned case aria2 outputs a different percentage for each item being downloaded.

Solution

It should be possible to track the percentages for each item individually as each download item has a unique ID, in doing so the overall progress meter could represent the overall download percent and not jump sporadically.

Additional Context

• Only relates to download progress when using the aria2c downloader (must be enabled in advanced settings)

[Marco-9456]

Follow the issue template please

[Douile]

Sorry, it didn't show up when i made the issue. I will edit to look like it.