linux
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linux [2024/01/14 20:14] – nine | linux [2024/02/22 21:11] (current) – nine | ||
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+ | ===== email ===== | ||
+ | ==== sender guidelines ==== | ||
+ | |||
+ | - https:// | ||
+ | - https:// | ||
+ | - https:// | ||
+ | - https:// | ||
+ | |||
+ | |||
+ | ===== Video ===== | ||
+ | |||
+ | compress video for email sending | ||
+ | |||
+ | ffmpeg -i input.mp4 output_compressed.mp4 | ||
+ | |||
+ | adjust volume | ||
+ | ffmpeg -i input.avi -af " | ||
+ | | ||
+ | gives: | ||
+ | [Parsed_volumedetect_0 @ 0x55f12ff28780] n_samples: 1839104 | ||
+ | [Parsed_volumedetect_0 @ 0x55f12ff28780] mean_volume: | ||
+ | [Parsed_volumedetect_0 @ 0x55f12ff28780] max_volume: -31.5 dB | ||
+ | [Parsed_volumedetect_0 @ 0x55f12ff28780] histogram_31db: | ||
+ | [Parsed_volumedetect_0 @ 0x55f12ff28780] histogram_32db: | ||
+ | [Parsed_volumedetect_0 @ 0x55f12ff28780] histogram_33db: | ||
+ | |||
+ | |||
+ | increase max volume: | ||
+ | ffmpeg -i input.avi -af " | ||
+ | | ||
+ | | ||
+ | flip image | ||
+ | ffmpeg -i input.mp4 -vf " | ||
+ | | ||
+ | transpose options: | ||
+ | 0 = 90° counter-clockwise and vertical flip (default) | ||
+ | 1 = 90° clockwise | ||
+ | 2 = 90° counter-clockwise | ||
+ | 3 = 90° clockwise and vertical flip | ||
linux.1705263297.txt.gz · Last modified: 2024/01/14 20:14 by nine