[FFmpeg-devel] avformat: QuickTime Sample Description Table 'corruption' with ACLR atom.

Kevin Wheatley kevin.j.wheatley at gmail.com
Fri Feb 13 15:43:13 CET 2015


currently when writing ACLR atoms to .mov's there is a 'corruption'
caused by the function mov_write_avid_tag() writing an additional 4
bytes of zero's. this is potentially then followed by other atoms colr
and pasp. Looking at the specifications it appears this 4 bytes is
supposed to occur at the end of the stsd if at all, as it is optional.

I'm working on a patch to fix the 'corruption' but wondered how to
handle the optional terminator:

1) Don't write one ever
2) Write one if requested by adding a flag to -movflags stdsterminator
3) Write one by default, add a 'nostdsterminator' flag (needs a better name)
4) always write one.

I'm favouring 2 or 3

Currently I've done option 1 see



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