Encoding process

The encoding system of Kewego works the following way :

1. The user uploads a video. This video has as a source size : source width x source height, and a source bitrate.

2. The encoder starts by doing a format which is called ‘old’.

This format has a fixed size of 400x300, a max bitrate of 512kbps, and is encoded in flv. However the aspect ratio of the initial video is kept, and the encoder adds black areas around the video to do a panscan.

3. Then the encoder does a format which is called ‘normal’.

This format has a fixed width of 400, a max bitrate of 512kbps, and is encoded in H264. The aspect ratio of the initial video is kept, and the height of the video is adapted to match the original ratio. So, for a source video which is in 16/9, the output video will be 400x224, whereas for a source in 4/3 the output video will be 400x300.

4. Then the encoder does another format which is called ‘high’.

This format is only done if certain conditions are met:

- the customer must have sunscribed to HD option

- the source width must be at least 1280 pixels

- the source bitrate must be at least 800kbps

This format has a fixed width of 1280 pixels, a max bitrate of 1024kbps, and is encoded in H264. The aspect ratio of the initial video is kept, and the height of the video is adapted to match the original ratio. So, for a source video which is in 16/9, the output video will be 1280x720, whereas for a source in 4/3 the output video will be 1280x 960

NB: Kewego is currently working on an ‘custom encoding profile’ feature which will allow customers to choose specific sizes and bitrates.