HALOWERKMedienwerk
speed change
Takes an audio or video file and changes its tempo by a factor from 0.5 (half speed) to 2.0 (double speed) while keeping the pitch, using the Rubber Band time-stretching library through ffmpeg — good for faster listening, language learning at reduced speed, or fitting a voice-over into a slot. The new running time is measured and returned. All timestamps of the original scale by 1/factor. Runs locally with ffmpeg; nothing leaves this machine and nothing is stored. Output inline as base64,.
POST https://medien.halowerk.com/v1/speed-changeEingaben
| Feld | Typ | Pflicht | Beschreibung |
|---|---|---|---|
| source | object | Ja | The recording. Either url or content_base64. |
| duration_minutes | integer | Ja | Length in started minutes — this is what you are billed for. |
| factor | number | Ja | |
| output_format | string | Nein |
Vollständiges Eingabeschema anzeigen
{
"type": "object",
"required": [
"source",
"duration_minutes",
"factor"
],
"additionalProperties": false,
"properties": {
"source": {
"type": "object",
"additionalProperties": false,
"description": "The recording. Either url or content_base64.",
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public http(s) URL of the file."
},
"content_base64": {
"type": "string",
"maxLength": 12000000,
"description": "The file inline, base64. Larger files by url."
},
"filename": {
"type": "string",
"maxLength": 260
}
}
},
"duration_minutes": {
"type": "integer",
"minimum": 1,
"maximum": 60,
"description": "Length in started minutes — this is what you are billed for."
},
"factor": {
"type": "number",
"minimum": 0.5,
"maximum": 2,
"default": 1.25
},
"output_format": {
"type": "string",
"enum": [
"opus",
"mp3",
"wav",
"flac"
],
"default": "mp3"
}
}
}Ergebnis & Dokumentation
Maschinenlesbare Dokumentation dieses Hubs
Quelle dieser Seite: der veröffentlichte HALOWERK-Katalog. Stand: 2026-11-01, 15:19 UTC.
Weitere Endpunkte dieses Hubs
- Medienwerk0,03 USDC · variabel
ad detect
POSThttps://medien.halowerk.com/v1/ad-detectTakes a podcast episode of up to 120 minutes and returns its advertising segments: paid sponsor reads, self-promotion (newsletter, Patreon, merchandise) and cross-promotion of other shows, each with start and end on sentence boundaries, the
- Medienwerk0,004 USDC · variabel
audio concat
POSThttps://medien.halowerk.com/v1/audio-concatTakes 2 to 10 audio or video files (each up to 24 MB, together up to 60 minutes) and joins their audio in the given order. Between parts either a pause of chosen length or a crossfade is placed; optionally every part is brought to a common
- Medienwerk0,002 USDC · variabel
audio convert
POSThttps://medien.halowerk.com/v1/audio-convertTakes an audio or video file and returns the audio in the requested format — MP3, Opus, Ogg Vorbis, AAC in M4A, WAV or FLAC — with selectable bitrate for lossy formats, sample rate and mono or stereo. Only the first audio stream is converte