This sample stream is taken from 'TVC HD', the new HD channel from "Televisió de Catalunya", the public television of Catalonia (PPCC). You can see lots of strange artifacts in most frames, specially when the actor moves. Here is some information from mediainfo: General #0 ID : 1 Complete name : h264-PAFF_block_artifacts.mpg Format : MPEG-4 Transport Format/Family : MPEG-4 File size : 9.77 MiB Video #0 ID : 4113 (0x1011) MenuID : 1 (0x1) Codec : AVC Codec/Family : AVC Codec/Info : MPEG-4 AVC Codec profile : High@L4.0 Codec settings, CABAC : Yes Width : 1440 pixels Height : 1080 pixels Display Aspect ratio : 16/9 Frame rate : 25.000 fps Chroma : 4:2:0 Interlacement : Top Field First Thanks for your good work, Marc.