VP8_HEADER_SIZE   405 libavformat/oggenc.c     p = av_mallocz(VP8_HEADER_SIZE);
VP8_HEADER_SIZE   409 libavformat/oggenc.c     oggstream->header_len[0] = VP8_HEADER_SIZE;
VP8_HEADER_SIZE    43 libavformat/oggparsevp8.c         if (os->psize < VP8_HEADER_SIZE) {