[Ffmpeg-devel] AVI Container Duration Incorrect
Tue May 31 15:38:41 CEST 2005
Michael Niedermayer wrote:
I have reviewed the OpenDML extensions for AVIs > 1GB. It doesn't look
difficult to implement, however, I do have some "process" questions.
1. The extended AVI headers introduce a new header that must be included
at the beginning of AVI. It is unclear whether having that header
("hdrx") included in an AVI < 1GB in size will break anything. Any comments?
2. To provide for larger file sizes, I would need to either estimate
whether the output file would be > 1GB in size, or provide an option (or
a different output format) to enable the use of the extended headers and
multiple RIFF blocks. Any preference or comments?
3. The document above specifies a "real file length" field in the "hdrx"
chunk but doesn't specify its size. Any ideas on where to get a
definitive answer? ('mplayer' has read code for this, but I hesitate to
copy it without another reference)
4. While encoding, what is the most efficient way to determine the
current file size?
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