usefulweb.site Video to MP3 Extractor

Audio, video & images

Video to MP3 Extractor

Extract a video’s soundtrack as MP3, WAV or FLAC, or copy the original audio losslessly.

MP4, MOV, MKV, WebM, AVI, MPEG-TS, WMV, FLV; max 250 MB and 20 minutes. Processed on our server in a private temporary folder that is deleted afterwards; the result can be downloaded for about 2 hours.

1 = first audio track. The report lists all tracks with language and codec.

Optional. Seconds, mm:ss or hh:mm:ss.mmm.

Optional. Empty = to the end.

Try an example: Soundtrack of a test clip as MP3 · Copy the original AAC track into M4A

How it works

Extracts an audio track from MP4, MOV, MKV, WebM, AVI and other videos. Pick the track if there are several (e.g. languages), save it as MP3 (VBR or CBR), WAV or FLAC, or copy the original AAC/Opus/Vorbis/MP3/FLAC stream into M4A/Ogg/MP3/FLAC without re-encoding. Optional start/end trim.

  • ffprobe lists the audio tracks (codec, channels, sample rate, language). The chosen track is mapped with -map 0:a:N; video, subtitles and data are dropped.
  • MP3 uses LAME VBR (-q:a 0/2/4) or CBR; WAV is 16-bit PCM; FLAC is lossless level 5.
  • "Copy" keeps the original bitstream: AAC/ALAC → M4A, MP3 → MP3, Opus → .opus (Ogg), Vorbis → Ogg, FLAC → FLAC, 16/24-bit PCM → WAV. Other codecs (e.g. AC-3, DTS) need re-encoding and are refused in copy mode.
  • Trimming seeks to the start time and stops after the requested length. In copy mode cuts land on audio frame boundaries (a few milliseconds).

Sources

For scripts and AI agents

  • JSON API: POST https://videotoaudioextractor.usefulweb.site/api/v1/calculate (same calculation as this page)
  • Interface description: OpenAPI 3.1 · AI guide: llms.txt
  • MCP server (Streamable HTTP): https://videotoaudioextractor.usefulweb.site/mcp · tool name video_to_audio_extractor
Example request
curl -s -X POST https://videotoaudioextractor.usefulweb.site/api/v1/calculate \
  -H 'content-type: application/json' \
  -d '{…see OpenAPI examples…}'

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