Mastering mp4 and webm video using Video Artifact

Encode mp4 and webm with best possible quality and speed.

2017-02-05

Video Artifact Premium can be used for video mastering.

VA has a possibility to encode for consumer distribution your 8-bit or 10-bit source video with 16 or 24 bit audio with one mouse click. Many source formats are supported including DNxHD in MOV or MXF from DaVinci Resolve.

It can create different resolution versions with correct color matrix: bt.709 of bt.601. These resolutions are supported: 240p, 360p, 480p, 720p and 1080p. For 240p/360p it creates a half frame-rate version from a 50 or 60 fps source. Resize is gamma-compatible and processed in a linear light space. Also it is ringing-free.

Mastering features:

  • High quality YouTube export, that is compatible with 10-bit video. Usually 8-bit video is dithered and some values between bytes should be encoded with dithering patterns. For YouTube compressor this means additional bitrate for these flat areas. So we have compression artifacts even for a static video. I had some experiments with encode dithering. And now VA has the best possible quality encode algorithm that keeps bitrate for YouTube and Vimeo. It is compatible with a screen-recorded content or a reclaim video with large flat areas.
  • Consumer video encode for mp4. VA uses external x264 and Apple Quick Time AAC encoders. Compression settings are tuned for a compromise between quality, encode speed and old device compatible. There are different encode scripts for screen content and movie with very different encode settings.
  • Internet video encode for webm. VA uses a reference Google vpxenc VP9 encoder and Opus. Compression settings were tuned for screen content and movie. Now I have best possible quality webm VP9 encoding, because the settings were optimized by hand for every supported resolution. Also it is very fast. Default settings allows you to encode 1080p VP9 video on 4 GHz i7 with 2-4 fps.

While mastering you can also create a special low-compressed version to keep it and use this master video later to encode for additional resolution or different encoding settings. This keeps user time. Restoring a NLE project from backup and then to encode film again may be very slow. VA uses H.264 10-bit 4:2:2 video for master purposes. It is compatible with 24-bit audio.