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envied/post_processing/post_processing.md
2025-12-17 12:35:29 +00:00

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# Post Processing.
With a mega program like envied it is sometimes difficult to make internal program changes to reflect personal needs.
Using a post-processor on the downloaded results may provide a solution.
I have found two unmet needs:
* Extract srt subtitles
* Convert mkv output to mp4 (or any other video container format, with code adjustment)
Here are two scripts which operate from a root folder (downloads - for instance), and operate on all the mkv files found within. The original files are left in place - for you to remove as necessary.
## Extract srt subtitles
Use
* uv run envied dl -S my5 https://www.channel5.com/show/taggart/season-1/killer
-S tells envied to download subtitles only. However it produces an mks file as a result.
Run 'python extract_mks_subs.py' in the root folder with your mks downloaded files. There are options: --dry-run will allow checking all is well before extraction.
If you start with a full mkv container - video, audio and subtitles tracks - and wish to extract subtitles, then they will no longer be held in track 0 of an mks file - the program defaults. So use the --track parameter and set it to the third track of 0,1,2. And the full container extension is mkv -the script needs the default settings over-riding with:
* 'python extract_mks_subs.py --track 2 --ext mkv '.
## Convert to mp4
Run
* 'python mkv_to_mp4.py'
in the root folder with mkv files.
The option: --dry-run will allow checking all is well before converion.
Conversion to other formats is complex and not suited to this simple routine as the audio/video codecs would each need need re-coding to suit the required output.