Encoding error when trying to write file

rubyonrails-talk
1

[Rails 3 - Ruby 1.9.2]

I have to get email attachments ( mp4 files ) and store them... I get easily all parts using Mail ( .... <Content-Type: multipart/ mixed...."> )

        attachment = mail.attachments[0]         #<Mail::Part:2206885940, Multipart: false, Headers: <Content- Type: video/mp4; name=landscape.mp4>, <Content-Transfer-Encoding: base64>, <Content-Disposition: attachment; filename=landscape.mp4>> got what I need,

but trying to store this attachment in a temp file , I get an encoding error :

     File.open(filepath,File::CREAT|File::TRUNC|File::WRONLY,0644) { | f> f.write(attachment.body) }

       Encoding::UndefinedConversionError Exception: "\x80" from ASCII-8BIT to UTF-8

did I miss anything before writing the file ? or is it a known Ruby bug ? being an .mp4 attachment, it should be a binary file.. it comes as an UTF-8 ( Base64) ? , right... how should I write it as a binary too ?

tfyh