HQX

• FourCC: CHQX
• Company: Grass Valley
• Samples: http://www.eso.org/public/videos/archive/search/?adv=&minimum_size=6 (look for .avi files under '4K Ultra HD Broadcast' heading)

This is a typical intermediate codec that codes frames as intra-only and split into independent slices with 8x8 DCT blocks. Supported formats are YUV 422, YUV 444, YUV 422a and YUV 444a.

Links

• http://www.grassvalley.com/docs/WhitePapers/professional/GV-4097M_HQX_Whitepaper.pdf
• http://www.grassvalley.com/docs/WhitePapers/professional/edius/GV-6097M-3_HQX_WP.pdf
• http://codecs.multimedia.cx/?p=578
• https://github.com/libav/libav/blob/master/libavcodec/hqx.c