[FFmpeg-devel] [PATCH] Turn off usage of base_data_offset in tfhd for PIFF files

[Jeremy Hinegardner]

Hi all

I am generating ISMV files via ffmpeg, and the player we are using is quite
strict according to the PIFF specification. 

It appears that when ffmpeg is creating ISMV files it is setting the 
`base_data_offset` flag which is contrary to what the PIFF specification[1] specifies. 
Section 5.2.17 says "the base_data_offset field MUST be omitted".

I managed to track this down and it appears the fix is just a single bit flag to 
be blanked out. With this patch the players we have tested are now happy
with the ismv files created by ffmpeg.

thanks for you time,

[1] http://www.iis.net/learn/media/smooth-streaming/protected-interoperable-file-format

-jeremy 

-- 
Jeremy Hinegardner
Copious Free Time, LLC

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