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ffmpeg - MPEG Audio Constant bit rate conversion - …
https://stackoverflow.com/questions/63133963/mpeg-audio-constant-bit-rate-conversion
The output using ffmpeg -i input.wav -vn -ac 2 -b:a 160k output1.mp3 is constant bit rate, however ffmpeg writes a header with the title Xing and Mediainfo infers that to indicate VBR. Disable writing that header if you want Mediainfo to detect Constant bit rate. ffmpeg -i input.wav -vn -ac 2 -b:a 160k -write_xing 0 output1.mp3.
ffmpeg - How to specify audio and video bitrate - Super User
https://superuser.com/questions/319542/how-to-specify-audio-and-video-bitrate
In order to specify the target bitrate for video and audio, use the -b:v and -b:a options, respectively. You can use abbreviations like K for kBit/s and M for MBit/s. For example: ffmpeg -i input.mp4 -b:v 1M -b:a 192k output.avi Note: This is a simple one-pass encode that tries to reach the specified bitrate at the end.
FFmpeg H.264 Constant Bitrate (CBR) Encoding | Broken ¦ Pipe
https://brokenpipe.wordpress.com/2016/10/07/ffmpeg-h-264-constant-bitrate-cbr-encoding-for-iptv/
FFmpeg H.264 Constant Bitrate (CBR) Encoding. Example command using a single-frame VBV: for even lower latency use -tune zerolatency and intra-refresh. single-frame VBV can be inaccurate with small frame-sizes and multi-threading. If the encoder reports many VBV underflows try setting -threads 1.
FFmpeg VBR Settings
https://slhck.info/video/2017/02/24/vbr-settings.html
FFmpeg: Extract Audio From Video In Original Format Or ...
https://www.linuxuprising.com/2019/11/ffmpeg-extract-audio-from-video-in.html
This article explains how to use FFmpeg to extract the audio stream from a video, either without re-encoding (keeping the original format), or converting the resulting audio file to CBR (constant bitrate) or VBR (variable bitrate) MP3 or Ogg Vorbis. To use the FFmpeg examples / commands below, you'll need to have FFmpeg installed on your system. Optionally also install …
FFmpeg Codecs Documentation
https://ffmpeg.org/ffmpeg-codecs.html
This encoder is the default AAC encoder, natively implemented into FFmpeg. 8.1.1 Options b. Set bit rate in bits/s. Setting this automatically activates constant bit rate (CBR) mode. If this option is unspecified it is set to 128kbps. q. Set quality for variable bit rate (VBR) mode. This option is valid only using the ffmpeg command-line tool.
[ffmpeg] why using AAC codec the bitrate is alwais VBR? I ...
https://forum.videohelp.com/threads/391032-%5Bffmpeg%5D-why-using-AAC-codec-the-bitrate-is-alwais-VBR-I-need-CBR
Writing application : fdkaac 0.6.3, libfdk-aac 3.4.22, CBR 128kbps Audio ID : 1 Format : AAC LC Format/Info : Advanced Audio Codec Low Complexity Codec ID : mp4a-40-2 Duration : 3 min 56 s Bit rate mode : Variable Bit rate : 128 kb/s Maximum bit rate : 163 kb/s Channel(s) : 2 channels Channel layout : L R Sampling rate : 44.1 kHz Frame rate : 43.066 FPS …
When converting audio to an MP3 using CBR, result ... - FFmpeg
https://trac.ffmpeg.org/ticket/431
Uncommenting mp3_write_xing() seems to work, bit rate mode changes to constant. mediainfo test_ffmpeg_cbr.mp3 General Complete name : test_ffmpeg_cbr.mp3 Format : MPEG Audio File size : 3.23 MiB Duration : 3mn 31s Overall bit rate : 128 Kbps Encoding settings : Lavf53.11.0 Audio Format : MPEG Audio Format version : Version 1 Format profile : Layer 3 Mode : Joint …
music - Changing sample format and bit depth on audio ...
https://askubuntu.com/questions/1306318/changing-sample-format-and-bit-depth-on-audio-files-with-ffmpeg
See a list of encoders with ffmpeg -encoders; See what audio sample formats (bit depth) an encoder supports with ffmpeg -h encoder=pcm_s16le; Or manually set the audio sample format. With the -sample_fmt option. ffmpeg -i input.wav -sample_fmt s16 -ar 44100 output.wav See a list of audio sample formats (bit depth) with ffmpeg -sample_fmts
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