The only mp4 to exr conversion that is perhaps feasible is generating EXR pictures from individual frames of MP4 video track. Certainly doable and the only thing you will need for that is some good video editing software that allows for capturing of individual frames.
Home > Search converters: mp4 to exr
Conversion of mp4 file format to exr file format beta
Search for mp4 to exr converter or software able to handle these file types.
Convert MPEG-4 video file format to OpenEXR Image Format.
We have found 2 software records in our database eligible for .mp4 to .exr file format conversion.
Microsoft Windows software 
- convert mp4 to exr on Windows
Adobe After Effects
Movie post-production program from Adobe
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from mp4 file | No | No | No | No | No | Yes | Yes | No |
to exr file | Yes, Adobe After Effects supports exr file conversion as a target file type. | Yes | Yes | exr editor | Yes | No | Yes | No |
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned mp4 to exr. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Multiplatform software 
- convert mp4 to exr on any platform
Krita
A sketching and painting program
Additional links: Open mp4 file, Open exr file
MP4
An mp4 file extension is typically used for MPEG-4 multimedia files defined by ISO 14496-1 standard. Commonly used for video and movie files and supported by vast number of media players.
EXR
An exr file extension is used for images stored in the OpenEXR Image Format that was developed by the Industrial Light & Magic. OpenEXR image format was going to public in 2003 and it is supported by popular graphics applications, such as Adobe Photoshop, Adobe After Effects, 3D Studio Max, Blender etc.
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