Convert AC3 to SPX

Turn AC3 recordings into Speex. Re-encoded as Speex speech coding in an Ogg file at 8, 16 or 32 kHz in mono or stereo, unless audio.sample_rate or audio.channels say otherwise, which loses a little more than the AC-3 already did.

Converted in an isolated sandbox on our serversDeleted after 24 hours

Drop AC3 files on the dialor turn it to pick what to do

AC3 and SPX

From

AC-3 Audio

Dolby Digital audio, the surround sound of DVDs.

Extensions: .ac3
MIME type: audio/ac3
Kind: Audio

To

Speex

Speex speech audio in an Ogg container, the predecessor of Opus.

Extensions: .spx
MIME type: audio/x-speex
Kind: Audio

Options for AC3 to SPX

audio.channels: Number of audio channels. 1 is mono, 2 is stereo.
audio.denoise: Reduce steady background noise.
audio.normalize: Normalize loudness to -16 LUFS as streaming services do.
audio.sample_rate: Audio sample rate in Hz.
speed: Playback speed multiplier. 2 plays twice as fast.
trim_end: Second at which the audio or video stops.
trim_start: Seconds to cut from the start of audio or video.