Convert MP4 to MKA

Turn MP4 videos into MKA. The audio is moved into Matroska as it is, so nothing is lost and a cut lands on the nearest frame; any other option re-encodes it as FLAC at the track's bit depth, 16 bits for lossy sound.

Converted in an isolated sandbox on our serversDeleted after 24 hours

Drop MP4 files on the dialor turn it to pick what to do

MP4 and MKA

From

MP4 Video

The most compatible video container, usually H.264 video with AAC audio.

Extensions: .mp4, .m4v
MIME type: video/mp4
Kind: Video

To

Matroska Audio

Audio-only Matroska. Any codec, with chapters and tags.

Extensions: .mka
MIME type: audio/x-matroska
Kind: Audio

Options for MP4 to MKA

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.