FFmpeg tips for FLAC and WAV

• covert flac to pcm with 24 bits resolution

ffmpeg -i a.flac -c:a pcm_s24le a.wav

• separate stereo wav to the left and right channel with 24 bits resolution

./ffmpeg -i 2L-45_stereo_01_FLAC_88k_24b.wav -c:a pcm_s24le -map_channel 0.0.0 2L-45_stereo_01_FLAC_88k_24b_left.wav -c:a pcm_s24le -map_channel 0.0.1 2L-45_stereo_01_FLAC_88k_24b_right.wav

• convert mono wav to mono flac

.\ffmpeg.exe -i .\2L-139_stereo_FLAC_88k_24b_01_Right.wav  .\2L-139_stereo_FLAC_88k_24b_01_Right.flac

• generate FLAC waveform, stereo

ffmpeg -i .\2L-45_stereo_01_FLAC_88k_24b.flac -filter_complex "showwavespic=s=1920x720:split_channels=1" -frames:v 1 .\2L-45_stereo_01_FLAC_88k_24b.png

• generate FLAC waveform, mono

ffmpeg -i .\2L-139_stereo_FLAC_88k_24b_01_Right.flac -filter_complex "showwavespic=s=1920x360" -frames:v 1 .\2L-139_stereo_FLAC_88k_24b_01_Right.png

• FLAC spec format

• Online hex editor

• mediainfo on MacBook to obtain media information, using brew install mediainfo for installation.

updated on NOV 28, 2021

• ffmpeg builds spectrum picture for audio files, reference https:// ffmpeg.org/ffmpeg-filte rs.html#toc-showspectrumpic

ffmpeg -i inputfile.mp3 -lavfi showspectrumpic=s=800x400:mode=separate spectrogram.png