DivX to SLN Converter

Get Asterisk PBX audio from DivX video files online

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DivX to PBX Audio

Transform DivX video audio into SLN format — ready for use as hold music, announcements, or IVR prompts on Asterisk phone systems.

Browser-Based Tool

No need to install Asterisk CLI tools just for audio conversion. Convert DivX to SLN entirely online from any device with a browser.

Private Processing

DivX uploads are deleted after conversion, and SLN output is removed within 24 hours. Your telephony audio remains securely handled.

How to convert DIVX to SLN

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose sln or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your sln file right afterwards

About formats

DivX is a family of video codecs and a media container format developed by DivX, LLC. The project traces its roots to a hacked version of the Microsoft MPEG-4 v3 codec that circulated in the late 1990s, but the legitimate DivX codec launched in January 2001 as an open-source project called OpenDivX before transitioning to a proprietary commercial product. The codec is based on MPEG-4 Part 2 (ASP) compression and later versions incorporated H.264/AVC and HEVC support. DivX gained enormous popularity in the early 2000s for its ability to compress a full-length movie into a file small enough to fit on a single CD-ROM while maintaining watchable visual quality. This compression efficiency made DivX a defining format of the early internet era, when bandwidth and storage were scarce resources. The DivX Media Format (.divx) container adds features like interactive menus, chapters, subtitles, and alternate audio tracks, bringing DVD-like functionality to digital files. DivX certification became a common label on consumer electronics, with thousands of DVD players and other devices supporting DivX playback natively. The codec also pioneered quality-based variable bit rate encoding that allocates more data to complex scenes and less to static ones, resulting in consistent visual quality throughout a video.
Developer: DivX, LLC
Initial release: January 15, 2001
SLN (Signed Linear) is a headerless raw audio format storing 16-bit signed linear PCM samples at 8000 Hz mono, most closely associated with Asterisk) — the open-source PBX framework developed by Digium (now Sangoma Technologies). Within Asterisk, SLN serves as the native internal audio representation: every codec transcoding operation passes through signed linear as an intermediate step. This makes SLN the backbone of Asterisk's codec translation architecture. The format contains nothing but raw samples — no headers, no metadata, no framing — so parameters must be known in advance. While this lack of self-description might seem limiting, it is actually an advantage in telephony where sample format is fixed by convention and every overhead byte matters across thousands of simultaneous channels. The 8000 Hz rate aligns with the G.711 standard for traditional telephony, capturing the full 300-3400 Hz voice band. Asterisk also supports extended variants (sln16, sln32, sln48) for wideband audio. SLN files require no decoding — just direct memory mapping — making them ideal for real-time mixing, conferencing, and prompt playback in high-density VoIP environments.
Initial release: 1999

Frequently Asked Questions

Why convert DivX to SLN?

SLN is the raw audio format used by Asterisk PBX systems. Converting DivX audio to SLN creates phone prompts, hold music, or greetings.

What is SLN format?

SLN stores 16-bit signed integer PCM at 8kHz in little-endian raw format. It is designed specifically for the Asterisk open-source PBX.

Can I use SLN on other platforms?

SLN is tailored for Asterisk. While SOX can process these files, the format is most useful within VoIP telephony environments.

Will the audio be phone-quality?

SLN at 8kHz matches standard telephony bandwidth. Speech from DivX videos sounds clear on phone systems — music may sound muffled.

How large are SLN files?

SLN is uncompressed raw PCM, so files are relatively large per minute of audio. Telephony prompts are usually short enough that this is fine.