convertem

This shit is basically just a wrapper around ffmpeg to convert files to various formats, cuz I cbf to remember obscure-ass flags. [[=[=[=[=[=[=

Usage

convertem [-h] [-k|-r] [-o <directory>] [-m] [-S] [-A <vaapi> -a <device>] [-c <hevc8|hevc10|h264>] [-s <time>] [-l <time>] <ico|ogg|mp3|mp4|mkv|mov|mkv> <file[s]>
Processed files are moved into a directory _convertem_orig, which is created inside your current working directory (unless specified otherwise 0fc ;]). By default the output files are stored in the same place as where every original used to be.

Options:

• -k: keep original file (i.e. don't move to ./_convertem_orig)
  
• -m: don't copy (IDv3) metadata, like from WAV to MP3
  
• -r: remove original file, or move it to a path specified in an environment variable CONVERTEM_TRASH
  
• -o: output to specified directory instead of grabbing the original file's dirname (implies -k, also creates the original directory structure in the destination)
  
• -h: show halp
  
  

-k and -r are mutually exclusive, should be pretty clear why (implied -k can still be overridden with -r).

Options for non-static files (audi0, vidy0) only:

• -s: start time (total amount of seconds or hh:mm:ss), skip part of a file
  
• -l: length of the chunk to extract (same format)
  
  

Options for vidy0 only:

• -A: try to use hardware acceleration with the specified acceleration type (only vaapi is supported/tested at the moment)
  
• -a: use the specified acceleration device (should pr0lly be /dev/dri/renderD128 for VAAPI)
  
• -c: use a certain output codec, so you can convert e.g. 10-bit HEVC to 8-bit or just any form of HEVC to good ol' h264 (NOTE: the original input codec is not checked)
  
• -S: extract embedded subtitles to a separate file and remove it from the original
  You can either convert to a different vidy0 format (like mp4 to mkv) or keep it as-is without any quality l0ss. ;]
  NOTE: .ass files may be accompanied by attachments for (custom) fonts, these will need to be manually dumped with e.g. ffmpeg -dump_attachment:t "" -i <input file>"
  
  

CODEC INFORMATION
When using specific codecs we use specific settings, these should pretty much correspond to "visually lossless" (or "audibly lossless" (?) for audio):"

• Vorbis (ogg): qscale 10
  
• MP3: qscale 0
  
• h264/AVC: CRF 19, always 8-bit
  
• h265/HEVC 8-bit: CRF 20
  
• h265/HEVC 10-bit: CRF 20
  
  

HARDWARE ACCELERATION
There are many ways to get it working, but this script has only been tested with intel-media-va-driver(-non-free). This is a pretty good driver with decent support (CPU generation 8 and up (Broadwell)). VAAPI itself is still pretty common so other drivers might work just fine as well.
Read m0ar: https://trac.ffmpeg.org/wiki/Hardware/QuickSync