Microsoft's proprietary ASF wrapper format is fully documented. WMV file-format variants defined by other video codecs, not documented at this time.įor file-based compressed video, bitstreams encoded as MPEG-2 (various profiles, the higher the better) or MP4-FF_2 (MPEG-4, various encodings and profiles, the higher the better) are preferred.įor uncompressed or losslessly compressed video, which is generally preferred to lossy compressed, MXF may be preferred as a wrapper this topic will be developed in a future investigation. Windows Media Video File with WMV9 Professional Codec Often final state format for enduser delivery sometimes a middle-state format, e.g., a high-quality video representation for archiving or as a source when producing lower-resolution streaming versions. Some WMV files may also employ Windows Media Video 7 and 8 codecs. This web site documents versions of the format that contain bitstreams encoded by Windows Media Video 9, which is also known as VC-9. File format based on ASF (Advanced Systems Format) that wraps a video bitstream.
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