Approach to catpture clip in lossless format using graphical preview and frame precision.
I use MPV with an encoding Lua script stored in this repo:
https://github.com/occivink/mpv-scripts / encode.lua
Which use MPV to define boudaries, and send them to ffmpeg.
To use the script, install the file here:
~/.config/mpv/scripts/encode.lua
In order to customize encoding and output settings, a configuration file should be created here:
~/.config/mpv/script-opts/<encode_custom_conf>.conf
Here is the config best suited to work with this program.
# format of the output filename
# Use an incremental number
output_format=$n.mkv
# where to put the file
# should be pointed to "src/clips"
output_directory=<PATH/TO/SRC/CLIPS>
# Only copy one video and one audio stream
# Video is lossy X264 with CRF 18,to obtain a decent quality
# Audio is lossy good quality OPUS
codec=-map -0 -map 0:v:0 -map 0:a:0? -ac 1 -map_metadata -1 -c:v libx264 -preset slow -crf 18 -b:a 160k
Key binding to trigger the script have to be defined in this main config:
~/.config/mpv/input.conf
Encoding script and custom configuration have to be specified like this (withouf file extension):
e script-message-to encode set-timestamp <encode_custom_conf>
Here, the key e is defined to lauch the script in point.
Custom shortcut can be scpecified in:
~/.config/mpv/input.conf
By default, , and . are used go back and forth.
I've just replaced the dot with ;, as it's more practical on an AZERTY keyboard.
# advance one frame and pause
; frame-step
And when pressing Alt key, it move ~1s back and forth (not precise but more efficient as it use only keeframes)
# seek ~1 second before or after, using keyframes
Alt+, seek -1
Alt+; seek 1
MPV doest not support pasting URL like VLC. This can be achieved using this script:
https://github.com/Eisa01/mpv-scripts / SmartCopyPaste.lua
Put this file in the script folder:
~/.config/mpv/scripts/SmartCopyPaste.lua