Question about FFMPEG deinterlacing methods

[Videogamer555]

I notice that FFMPEG (at least in the version used in XMediaRecode) has the ability to deinterlace video. You can select a number of deinterlacing filters. One of which is the libav deinterlacing method set. It has several types of deinterlacing it can do. One is Linear Blending, and the other is Linear Interpolation. What's the difference between these 2 methods?

[pandy]

I notice that FFMPEG (at least in the version used in XMediaRecode) has the ability to deinterlace video. You can select a number of deinterlacing filters. One of which is the libav deinterlacing method set. It has several types of deinterlacing it can do. One is Linear Blending, and the other is Linear Interpolation. What's the difference between these 2 methods?

Blending for me mean two fields (odd and even) are merged (blended) after increasing size in vertical twice, linear interpolation mean for me discard one field and increase resolution with linear interpolation resizer (so do not blend fields).

I would recommend you to use yadif as deinterlacer - not sure at this time but this seem to be best available deinterlacer in ffmpeg.
Alternatively you may give a chance to Avisynth QTGMC - Avisynth scripts can be directly accepted by ffmpeg and there is FFmpegSource in Avisynth.