|Simplified Manual Pages
The standard set of manual pages (often called man pages) which are available in most flavours of Linux, BSD and Unix tend to be long and they can be cryptic. Manual pages tend to list what options are available without explaining why we might use them. Further, many manual pages do not provide examples.
The TLDR-pages project has compiled a collection of simplified manual pages which present commands with a clear explanation of what each command does and lists examples of how the command is most often used. These simplified pages are available below.
Video conversion tool.
More information: home page
- Extract the sound from a video and save it as MP3:
ffmpeg -i video.mp4 -vn soundhome pagemp3
- Save a video as GIF, scaling the height to 1000px and setting framerate to 15:
ffmpeg -i video.mp4 -vf 'scale=-1:1000' -r 15 output.gif
- Combine numbered images (`frame_1.jpg`, `frame_2.jpg`, etc) into a video or GIF:
ffmpeg -i frame_%d.jpg -f image2 video.mpg|video.gif
- Quickly extract a single frame from a video at time mm:ss and save it as a 128x128 resolution image:
ffmpeg -ss mm:ss -i video.mp4 -frames 1 -s 128x128 -f image2 image.png
- Trim a video from a given start time mm:ss to an end time mm2:ss2 (omit the -to flag to trim till the end):
ffmpeg -ss mm:ss -to mm2:ss2 -i video.mp4 -codec copy output.mp4
- Convert AVI video to MP4. AAC Audio @ 128kbit, h264 Video @ CRF 23:
ffmpeg -i input_videohome pageavi -codec:a aac -b:a 128k -codec:v libx264 -crf 23 output_videohome pagemp4
- Remux MKV video to MP4 without re-encoding audio or video streams:
ffmpeg -i input_videohome pagemkv -codec copy output_videohome pagemp4
- Convert MP4 video to VP9 codec. For the best quality, use a CRF value (recommended range 15-35) and -b:v MUST be 0:
ffmpeg -i input_videohome pagemp4 -codec:v libvpx-vp9 -crf 30 -b:v 0 -codec:a libopus -vbr on -threads number_of_threads output_videohome pagewebm
The TLDR manual pages are distributed under the
Creative Commons Attribution 4.0 International License (CC-BY).
The project's scripts are licensed under the MIT license:
The MIT License (MIT)
Copyright (c) 2014 the TLDR team and contributors.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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