![]() Or possibly that the input was CBR, and the VBR aspect is able to reduce bitrate by a considerable amount.With VBR it could be due to the input already in being a lower bitrate than requested, in which case, it basically just re-encodes it at the bitrate of the input.With CBR it could be due to the chosen value being in-between allowable settings (it defaults down to the next lower acceptable bitrate).mp3 format is not dead can be used even for high quality encoding, with the. Sometimes the output will consist of fewer bits per second than requested: If you want to know what lame.exe really can do, you must recompile the source code with all the dev settings unlocked. See Hydrogen Audio: Recommended LAME Encoder Settings for more info.ĪBR is something of a mixture between VBR and CBR, see the official documentation for details on use. MP3 is lossy anyway, so if you really want the highest quality use a lossless format such as FLAC.-q:a 0 – -q:a 3 will normally produce transparent results.Note: Using -b:a 320k is generally considered wasteful because: So to get the highest quality setting use -b:a 320k (but see note below). Illustrate are an official patent licensor for the. ![]() Here you can specify the number of bits per second, for example -b:a 256k if you want 256 Kbit/s (25.6 KB/s) audio. Lame has been continuously developed over the years and is the highest quality mp3 encoder available today. If you need constant bitrate (CBR) MP3 audio, you need to use the -b:a option instead of -qscale:a. In our example above, we selected -qscale:a 2, meaning we used LAME's option -V 2, which gives us a VBR MP3 audio stream with an average stereo bitrate of 170-210 kBit/s. q:a 0 (NB this is VBR from 220 to 260 KB/s) b:a 320k (NB this is 32KB/s, or its max) The option -qscale:a is mapped to the -V option in the standalone lame command-line interface tool. It also supports batch processing and can utilize multiple processor cores. 0-3 will normally produce transparent results, 4 (default) should be close to perceptual transparency, and 6 produces an "acceptable" quality. LameXP is a free multi-format audio file converter that supports a variety of output formats, including MP3, AAC/MP4, Ogg Vorbis, Opus, as well as FLAC, and an even higher number of input formats. Values are encoder specific, so for libmp3lame the range is 0-9 where a lower value is a higher quality. See also other codecs you could use, and FFmpeg AAC Encoding Guide if you want AAC instead, and the official documentation.Įxample to encode VBR MP3 audio with ffmpeg using the libmp3lame library:įfmpeg -i input.wav -codec:a libmp3lame -qscale:a 2 output.mp3Ĭontrol quality with -qscale:a (or the alias -q:a). This page describes how to use the external libmp3lame encoding library within ffmpeg to create MP3 audio files ( ffmpeg has no native MP3 encoder).
0 Comments
Leave a Reply. |