It has free and paid editions.

http://www.videoartifact.com/va/

Program helps you to prepare footages from consumer or professional video cameras, digicams and V-DSLR.

It can remove MJPEG, MPEG, H.264, H.265 compression artifacts and digital noise, improves sharpness and color resolution up to 16 bit 4:4:4.

Restoration features:

• Script-based to work with unique cases. You can use many filters in any combination.
• 50+ specialized restoration filters work in Y, U, V separately in 8/16 bit.
• Possibility to use dozens of different type denoisers for different noise type.
• Accurate denoising that keeps micro details with no "plastic" effect.
• Removing of sharping halos.
• Linear color high quality spline-based resize to resize up to 4K. Resize halos can be removed.
• Precise halo-free radius-dependent sharping.
• Film grain emulation and 3D LUT grading.
• 4:2:0 8 bit to 4:2:2/4:4:4 16 bit chroma reconstruction.

It can be used in a post-production workflow if you use V-DSLR or consumer cameras.
Currently 50+ camera models supported and hundreds of compatible models.

Special features:

• Batch processing without GPU. Very fast: 5 fps for typical V-DSLR AVCHD source and 2 fps for 4K.
• Automatic joining of MTS, MOV and MP4 spans and renaming to yyyymmdd_hhmmss.mov format.
• Non-standard 16-255 to TV 16-235 levels conversion.
• ITU-R BT.601 ↔ BT.709 floating point conversion.
• NLE and DaVinci Resolve compatible workflow.
• Mastering to webm VP9/Opus or mp4 H.264/AAC 1080p/720p/360p/240p.

Examples with various restoration methods are available at http://www.videoartifact.com/examples/

Some samples: