9/4/2023 0 Comments Ffmpeg list encodersIf you want to preserve higher frequencies, use -cutoff 18000. Note: libfdk_aac defaults to a low-pass filter of around 14kHz ( details). Requires ffmpeg to be configured with -enable-libfdk-aac (and additionally -enable-nonfree if you're also using -enable-gpl).ĭetailed information about the FDK AAC library (not FFmpeg specific) can be found at HydrogenAudio Knowledgebase: Fraunhofer FDK AAC. This is currently the highest-quality AAC encoder available with ffmpeg (except on macOS, see below). See also Encode/HighQualityAudio for general guidelines on FFmpeg audio encoding (which also includes a comparison of which AAC encoder is best quality). This can be resolved by compiling ffmpeg yourself. Therefore this encoder have been designated as "non-free", and you cannot download a pre-built ffmpeg that supports it. The license of libfdk_aac is not compatible with GPL, so the GPL does not permit distribution of binaries containing incompatible code when GPL-licensed code is also included. The examples in this guide will use the extensions MP4 and M4A.įFmpeg supports three AAC-LC encoders ( aac, libfdk_aac, aac_at) and two HE-AAC (v1/2) encoder ( libfdk_aac, aac_at). The second-most common use is within MKV (Matroska) files because it has better support for embedded text-based soft subtitles than MP4. ![]() It is often used within an MP4 container format for music the. Advanced Audio Coding (AAC) is the successor format to MP3, and is defined in MPEG-4 part 3 (ISO/IEC 14496-3).
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