ah, i couldn’t find a copy of the standard, i’ll look it over and figure out 
what’s actually wrong, as the bug still remains.

Sent from my iPhone

> On Feb 1, 2019, at 2:12 PM, John Stebbins <jstebb...@jetheaddev.com> wrote:
> 
>> On 1/30/19 1:18 PM, Carl Eugen Hoyos wrote:
>> 2019-01-30 19:44 GMT+01:00, no pls <agrecascino...@gmail.com>:
>>> From: mptcultist <agrecascino...@gmail.com>
>>> 
>>> fixes an issue where if the video size was very specific,
>>> ffmpeg would hang from not filling the sidx_pts for all
>>> streams, due to not reading the last sidx lump. for #7572
>> Please wait for a review from John who has promised to look at
>> this issue "on Wednesday".
>> 
>> Carl Eugen
> 
> 
> Sorry I haven't had time to devote to this yet.
> 
> This patch is incorrect however.  offsets are relative to the anchor point 
> which is the *end* of the sidx. See ISO 14496-12 section 8.16.3.
> 
> "In the file containing the Segment Index box, the anchor point for a Segment 
> Index box is the first byte after that box."
> 
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