Cobble
Formats

Presets, explained.

Pick the output you need. Cobble only converts the tracks that have to change.

After Effects ready

.mp4 · H.264 + AAC

Converts to H.264 video and AAC audio, the pairing After Effects imports natively.

Source
VideoVP9
AudioOpus
→
Output
VideoH.264
AudioAAC

Already H.264 or AAC? That track is copied, not re-encoded.

ProRes 422

.mov · ProRes 422 + PCM

An editing codec that scrubs smoothly and cuts cleanly. Files are much larger than H.264.

Source
VideoVP9
AudioOpus
→
Output
VideoProRes 422
AudioPCM

Every track is converted. Audio-only downloads become WAV.

Keep original

Original container

Saves the streams exactly as the site serves them. Nothing is converted.

Source
VideoVP9
AudioOpus
→
Output
VideoVP9
AudioOpus

The fastest option, with no quality loss.

MP3

.mp3 · audio only

Pulls out the sound and saves an MP3. Use it for music, podcasts and voice clips.

Source
VideoVP9
AudioOpus
→
Output
VideoNone
AudioMP3

Audio that is already MP3 is copied.

Reference

Copied or converted.

A copied track is not re-encoded, so it keeps its quality and finishes faster.

PresetVideoAudioFile
After Effects readyH.264, copied if already H.264AAC, copied if already AAC.mp4, or .m4a for audio only
ProRes 422ProRes 422PCM.mov, or .wav for audio only
Keep originalCopiedCopiedOriginal container
MP3NoneMP3, copied if already MP3.mp3

Compressing a file you already have writes an H.264 or H.265 MP4 with AAC audio.

Get Cobble.

Free for Windows, 64-bit. Version 0.1.0.