To enable interlaced processing in vMix, set Master Frame Rate to one of the settings below.
This can be done from Settings -> Display

Master Frame Rate

50p, 59.94p, 60p, 50i, 59.94i, 60i

Interlaced sources will be separated into two separate frames for frame rates 50p and higher.

All other master frame rates are progressive and any Interlaced inputs will be deinterlaced automatically.



Interlaced Support




Select an Interlaced Frame Rate and tick the Interlaced check box


To enable additional file types for full interlaced processing, add them to the FFMPEG section of Settings -> Decoders

All other formats will be converted to progressive using Blend deinterlacing


Same as for Video above

Interlaced can be set for each video independently. 

Image Sequence

Yes, one image per field

Each image in an image sequence is treated as a field when using an interlaced output.

For example, 50 images are needed for 1 second of 50i video.

Video Delay

Yes, saved clips progressive

Saved clips are saved as Interlaced but will playback in vMix as Progressive only


NOTE: Interlaced Recording must be checked under Settings -> Recording

Interlaced recording is supported for AVI and MPEG-2 formats by setting the Recording Frame Rate to 50i, 59.94i or 60i

All recordings are Upper Field First with the exception of NTSC 480i which is Lower Field First

MP4 and WMV support progressive recording only.

External Output

NOTE: Interlaced Recording must be checked under Settings -> Recording

Interlaced recording is supported by setting the Frame Rate to 50i, 59.94i or 60i in External Output

Fullscreen Display

Fullscreen and preview windows will display the first field only when the Master Frame Rate is set to 50i, 59.94i or 60i

For full field display, set the Master Frame Rate to 50p or higher. 

Progressive output from Interlaced source

The following table describes how each Master Frame Rate is processed when using progressive frame rates for recording or external output.

Master Frame Rate

Output Frame Rate


50p, 59.94p, 60p

25p, 29.97p, 30p

Drop every second frame

50i, 59.94i, 60i

25p, 29.97p, 30p

Discards every second field. First field used for each frame

50i, 59.94i, 60i

50p, 59.94p, 60p

One frame per field