Ask HN: Can I see your cheatsheet?

Post by corobo » Thu, Jun 30, 2022, 9:33 AM UTC

ww520 wrote: post #62

vince14 wrote: post #58

Creating clips from tv recordings: ffmpeg -ss 01:59:00.000 -i "interlaced.ts" -ss 00:00:12.000 -t 26 -max_muxing_queue_size 1024 -c:a libopus -b:a 96k -c:v libx264 -crf 20 -vf "yadif=1" -profile:v baseline -level 3.0 -pix_fmt yuv420p -movflags +faststart -y clip.mp4 Make clip compatible with WhatsApp: ffmpeg -i in.mp4 -map 0:v:0 -map 0:a:0 -map_metadata -1 -map_chapters -1 -c:v libx264 -preset slow -tune film -crf 32…

Most streaming sites break a video into many small fragments, which are listed in a m4mu file. I have a script to download the fragments one by one using curl. To merge the video fragments back into one file, I do the following. Merge video files with ffmpeg - Make a file listing all the videos in sequence. E.g. file 'video01.ts' file 'video02.ts' file 'video03.ts' ... - Generate the file list for files in the curren…

Post by corobo » Thu, Jun 30, 2022, 9:36 AM UTC

ripley12 wrote: post #17

On a related note: has anyone used a good tool for using/inserting these kinds of custom snippets? It would be neat to have a snippet manager with quick search bound to a keypress.

Post by submeta » Thu, Jun 30, 2022, 9:37 AM UTC

CraigJPerry wrote: post #70

Set a huuuuuuuge shell history https://github.com/craigjperry2/dotfiles/blob/aa77ddcbde63bf... then fzf ctrl+r bindings mean you can recall anything right where you need it. If you’re going to do this then have an escape hatch for commands you don’t want memorised https://github.com/craigjperry2/dotfiles/blob/aa77ddcbde63bf...

Post by pmoriarty » Thu, Jun 30, 2022, 9:43 AM UTC

ww520 wrote: post #43

- Find all files modified in the last 90 minutes find . -type f -mmin -90 - Find all files and do something to each one find . -type f -mmin -90 | xargs ls -l - Find all files modified before 2 days ago find . -type f -mtime +2 - Removing files older than 7 days find . -type f -mtime +7 -name '*.gz' -exec rm {} \; - Find all files modified after last 2 days find . -type f -mtime -2 - Find all files modified at the la…

  - Find all files modified in the last 90 minutes
    print -l **/*(mm-90)
  - Find all files and do something to each one
    print -l **/*(mm-90) | xargs ls -l
  - Find all files modified before 2 days ago
    print -l **/*(m+2)
  - Removing files older than 7 days
    zargs -- **/*(m+7) -- rm
  - Find all files modified after last 2 days
    print -l **/*(m-2)
  - Find all files modified at the last 2 day mark
    print -l **/*(m2)

Post by pmoriarty » Thu, Jun 30, 2022, 9:54 AM UTC

goodevans wrote: post #68

ww520 wrote: post #43

- Find all files modified in the last 90 minutes find . -type f -mmin -90 - Find all files and do something to each one find . -type f -mmin -90 | xargs ls -l - Find all files modified before 2 days ago find . -type f -mtime +2 - Removing files older than 7 days find . -type f -mtime +7 -name '*.gz' -exec rm {} \; - Find all files modified after last 2 days find . -type f -mtime -2 - Find all files modified at the la…

Find all .txt files containing the word 'foo': find ./ -mount -type f -name "*.txt" -exec grep -iHn 'foo' {} \; (the -mount stops it traversing into mounted shares)

  grep -iHn 'foo' **/*.txt(.)