static int64_t mmsh_seek(URLContext *h, int64_t pos, int whence) { MMSHContext *mmsh = h->priv_data; MMSContext *mms = &mmsh->mms; if(pos == 0 && whence == SEEK_CUR) return mms->asf_header_read_size + mms->remaining_in_len + mmsh->chunk_seq * mms->asf_packet_len; return AVERROR(ENOSYS); }