How to compress data use jzlip for j2me or others Compression Techniques

Question

I want to capture audio use mmapi and upload to a server ,but wav is too large for me,how can I compress it?thanks!

Answer 1

Hi,
I tried this trigger method to compress. It does not work. I get an invalid argument error.
I however figured a complete solution using forms: Here it is:
to compress and store:
Just put it to the table and use an update statement like this:
UPDATE dlo_channa_documents
SET da_document = UTL_COMPRESS.LZ_COMPRESS( da_document ) WHERE pk = :DLO_CHANNA_DOCUMENTS.pk;
Now to uncompress and show
(1.) Create a temp table with blob column
(2.) Insert record to temp table like this:
     INSERT INTO dlo_channa_temp_blob
     SELECT v_next_val, UTL_COMPRESS.LZ_UNCOMPRESS( da_document )
     FROM dlo_channa_documents
     WHERE pk = :dlo_channa_documents.pk;     
(3.) Now use webutil_file_transfer.db_to_client to transfer from temp table to client hdd and show using
     CLIENT_HOST( 'cmd /C start ' ||      v_saved_file_name_full_path); -- Open the document in Word
Edited by: Channa on Feb 26, 2010 4:02 AM