Log Message:
Changes 2.2.4:
avformat/mpc: attempt to allocate a packet that is not smaller than the data \ 
inside it
avformat/cavsvideodec: Fix probing when the file extension is avs
cavsdec: fix qp fixed slice handling
avcodec/alsdec: Clear MPEG4AudioConfig so that no use of uninitialized memory is \ 
possible
avformat/flvenc: Do not allow creating h263/mpeg4 in flv without unofficial \ 
format extensions being enabled.
avcodec/aic: fix quantization table permutation
avutil/lzo: add asserts to be double sure against overflows
avutil/lzo: Fix integer overflow
Show duration for large asf files as written in the file header.