46 lines
1.1 KiB
Org Mode
46 lines
1.1 KiB
Org Mode
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#+title: Unixfu
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#+date: <2024-01-14 Sun>
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#+category: linux
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A bin for some useful UNIX command.
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* Add two hours
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This could be useful for nocmig fan, to ease the hour computation of a bird contact.
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#+begin_src bash
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hour() {
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start=$1
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duration=$2
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IFS=":" read -r duration_hour duration_minute <<< $duration
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date -d "$start $(($duration_hour * 60 + $duration_minute)) minutes" +"%H:%M"
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}
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hour 17:00 5:43
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#+end_src
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#+RESULTS:
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: 22:43
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* WAV creation datetime
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Here is a small snippet that demonstrates how to get the creation date-time of a WAV file with =ffprobe=
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#+begin_src bash
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wav_creation_date() {
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wav="$1"
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date_key="date"
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time_key="creation_time"
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for key in $date_key $time_key; do
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ffprobe "${wav}" -v quiet -select_streams v:0 -of default=noprint_wrappers=1:nokey=1 -show_entries stream=codec_type=stream_tags=creation_time:format_tags=${key}
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done
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}
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#+end_src
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Then, on the WAV file =example.wav=:
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#+begin_src bash
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echo $(wav_creation_date example.wav)
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#+end_src
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#+begin_example
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2024-01-12 18:56:28
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#+end_example
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