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FFmpeg: Extract Audio From Video In Original Format Or ...
https://www.linuxuprising.com/2019/11/ffmpeg-extract-audio-from-video-in.html#:~:text=Extract%20audio%20from%20a%20video%2C%20using%20Ogg%20as,3%20being%20default%20%28with%20a%20target%20of%20112kbps%29.
FFmpeg VBR Settings
https://slhck.info/video/2017/02/24/vbr-settings.html
FFmpeg Codecs Documentation
https://ffmpeg.org/ffmpeg-codecs.html
Set VBR mode, from 1 to 5. 1 is lowest quality (though still pretty good) and 5 is highest quality. A value of 0 will disable VBR, and CBR (Constant Bit Rate) is enabled. Currently only the ‘aac_low’ profile supports VBR encoding. VBR modes 1-5 correspond to roughly the following average bit rates: ‘1’ 32 kbps/channel ‘2’ 40 kbps/channel
Is there a way to identify if an audio is VBR or CBR using ...
https://stackoverflow.com/questions/59549766/is-there-a-way-to-identify-if-an-audio-is-vbr-or-cbr-using-ffmpeg
We can then batch our way through the ffprobe on each, picking out the bitrate. For one of the audio segment. $ ffprobe -hide_banner i01.wav Input #0, wav, from 'i01.wav': Duration: 00:00:01.00, bitrate: 705 kb/s Stream #0:0: Audio: pcm_s16le ( [1] [0] [0] [0] / 0x0001), 44100 Hz, 1 channels, s16, 705 kb/s.
Information about using FFmpeg's vbr_hq (VBR High …
https://www.reddit.com/r/ffmpeg/comments/qnie58/information_about_using_ffmpegs_vbr_hq_vbr_high/
Specifically I am trying to encode with FFmpeg in H264 - NVENC trying to get the same export quality as Davinci Resolve that uses the NVIDIA encoder. Unfortunately I'm not succeeding and I think it's because FFmpeg doesn't accept -rc: v vbr_hq (VBR High Quality) but only -rc: v vbr (VBR) .
--audio-quality : youtubedl
https://www.reddit.com/r/youtubedl/comments/pqy4mt/audioquality/
Ctrl+f audio-quality: Specify ffmpeg/avconv audio quality, insert a value between 0 (better) and 9 (worse) for VBR (variable bitrate) or a specific bitrate like 128K (128kbps) (default 5). I doubt it would reencode mp3s, because YouTube only has AAC and OPUS.
FFmpeg Command Options - 2020
https://www.bogotobogo.com/VideoStreaming/ffmpeg_options_list.php
Audio Options. -aframes number set the number of audio frames to record -ab bitrate set audio bitrate (in kbit/s) -ar rate set audio sampling rate (in Hz) -ac channels set number of audio channels -an disable audio -acodec codec force audio codec ('copy' to copy stream) -vol volume change audio volume (256=normal) -newaudio add a new audio ...
FFmpeg: Extract Audio From Video In Original Format Or ...
https://www.linuxuprising.com/2019/11/ffmpeg-extract-audio-from-video-in.html
A table presenting each FFmpeg VBR option is available here. Extract audio from a video, using Ogg as the resulting container (it should auto-detect Vorbis as the audio format), with variable bitrate (VBR): ffmpeg -i myvideo.mp4 -vn -q:a QUALITY audio.ogg The QUALITY range is -1.0 to 10.0, with 10.0 being the highest quality, and 3 being default (with a target of 112kbps).
Encode/MP3 – FFmpeg
https://trac.ffmpeg.org/wiki/Encode/MP3
ffmpeg -i input.wav -codec:a libmp3lame -qscale:a 2 output.mp3 Control quality with -qscale:a (or the alias -q:a ). Values are encoder specific, so for libmp3lame the range is 0-9 where a lower value is a higher quality. 0-3 will normally produce transparent results, 4 (default) should be close to perceptual transparency, and 6 produces an "acceptable" quality.
ffmpeg Documentation
https://ffmpeg.org/ffmpeg.html
Set the audio quality (codec-specific, VBR). This is an alias for -q:a. -ac[:stream_specifier] channels (input/output,per-stream) Set the number of audio channels. For output streams it is set by default to the number of input audio channels.
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