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ffmpeg: audio visualization tricks
https://lukaprincic.si/development-log/ffmpeg-audio-visualization-tricks#:~:text=ffmpeg%3A%20audio%20visualization%20tricks%201%20Audio%20Vector%20Scope.,any%20of%20the%20above%20with%20a%20%E2%80%9Cdrawtext%E2%80%9D%20filter.
ffmpeg Documentation
https://ffmpeg.org/ffmpeg.html
Set the audio sampling frequency. For output streams it is set by default to the frequency of the corresponding input stream. For input streams this option only makes sense for audio grabbing devices and raw demuxers and is mapped to the corresponding demuxer options. -aq q (output) Set the audio quality (codec-specific, VBR). This is an alias for -q:a.
15 Useful 'FFmpeg' Commands for Video, Audio and …
https://www.tecmint.com/ffmpeg-commands-for-video-audio-and-image-conversion-in-linux/
Get Video File Information. To get information about a file (say video.mp4), run the following …
audio types – FFmpeg
https://trac.ffmpeg.org/wiki/audio%20types
Reading and Writing Raw Audio. FFmpeg can take input of raw audio types by specifying the type on the command line. For instance, to convert a "raw" audio type to a ".wav" file: ffmpeg -f s32le input_filename.raw output.wav You can specify number of channels, etc. as well, ex: ffmpeg -f u16le -ar 44100 -ac 1 -i input.raw output.wav
FFmpeg Resampler Documentation
https://ffmpeg.org/ffmpeg-resampler.html
2 Resampler Options. The audio resampler supports the following named options. Options may be set by specifying -option value in the FFmpeg tools, option=value for the aresample filter, by setting the value explicitly in the SwrContext options or using the libavutil/opt.h API for programmatic use. ich, in_channel_count. Set the number of input channels.
ffmpeg: audio visualization tricks | Luka Prinčič
https://lukaprincic.si/development-log/ffmpeg-audio-visualization-tricks
Shell. # create a spectrogram as a single frame ffmpeg -i INPUT.wav -lavfi showspectrumpic=s=hd480:legend=0,format=yuv420p SPECTROGRAM.png # add png to audio - you need to know the length of audio ffmpeg -loop 1 -i SPECTROGRAM.png -i INPUT.wav -s hd480 -t 00:01:00 -pix_fmt yuv420p -b:a 360k -r:a 44100 OUTPUT.mp4. 1.
FFmpeg Codecs Documentation
https://ffmpeg.org/ffmpeg-codecs.html
The following options are mapped on the shared FFmpeg codec options. b. Set bit rate in bits/s. If the bitrate is not explicitly specified, it is automatically set to a suitable value depending on the selected profile. In case VBR mode is enabled the option is ignored. ar. Set audio sampling rate (in Hz). channels. Set the number of audio channels.
Encode/MP3 – FFmpeg
https://trac.ffmpeg.org/wiki/Encode/MP3
Here you can specify the number of bits per second, for example -b:a 256kif you want 256 Kbit/s (25.6 KB/s) audio. Available options are: 8, 16, 24, 32, 40, 48, 64, 80, 96, 112, 128, 160, 192, 224, 256, or 320 (add a kafter each to get that rate). So to get the highest quality setting use -b:a 320k(but see note below).
20+ FFmpeg Commands For Beginners - OSTechNix
https://ostechnix.com/20-ffmpeg-commands-beginners/
FFmpeg Formats Documentation
https://ffmpeg.org/ffmpeg-formats.html
Options may be set by specifying -option value in the FFmpeg tools, or by setting the value explicitly in the AVFormatContext options or using the libavutil/opt.h API for programmatic use. The list of supported options follows: avioflags flags (input/output) Possible values: ‘direct’ Reduce buffering. probesize integer (input)
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