7 - The decision intra/predicted macroblock is the algorithm suggested
8 by the mpeg 1 specification.
10 - only Huffman based H263 is supported, mainly because of patent
13 - MPEG4 is supported, as an extension of the H263 encoder. MPEG4 DC
14 prediction is used, but not AC prediction. Specific VLC are used for
15 intra pictures. The output format is compatible with Open DIVX
18 - MJPEG is supported, but in the current version the huffman tables
19 are not optimized. It could be interesting to add this feature for
22 - To increase speed, only motion vectors (0,0) are tested for real
23 time compression. NEW: now motion compensation is done with several
24 methods : none, full, log, and phods. The code is mmx/sse optimized.
26 - In high quality mode, full search is used for motion
27 vectors. Currently, only fcode = 1 is used for both H263/MPEG1. Half
33 - The mpeg audio layer 2 compatible encoder was rewritten from
34 scratch. It is one of the simplest encoder you can imagine (800
35 lines of C code !). It is also one of the fastest because of its
36 simplicity. There are still some problems of overflow. A minimal
37 psycho acoustic model could be added. Currently, stereo is
38 supported, but not joint stereo.
40 - The AC3 audio encoder was rewritten from scratch. It is fairly
41 naive, but the result are quiet interesting at 64 kbit/s. It
42 includes extensions for low sampling rates used in some Internet
43 formats. Differential and coupled stereo is not handled. Stereo
44 channels are simply handled as two mono channels.
46 - The mpeg audio layer 3 decoder was rewritten from scratch. It uses
47 only integers and can be 16 bit precision for the synthesis filter
48 at the expense of a slight precision loss. A slower bit exact mode
49 is available too for compliance testing.