[haiku-bugs] Re: [Haiku] #9193: Sniffer rule for video/mp2t too simple
- From: "phoudoin" <trac@xxxxxxxxxxxx>
- Date: Fri, 05 Apr 2013 08:58:52 -0000
#9193: Sniffer rule for video/mp2t too simple
-------------------------------------+-------------------------
Reporter: dsuden | Owner: jscipione
Type: bug | Status: closed
Priority: normal | Milestone: R1
Component: Preferences/FileTypes | Version: R1/alpha4.1
Resolution: fixed | Keywords:
Blocked By: | Blocking: 7935
Has a Patch: 1 | Platform: All
-------------------------------------+-------------------------
Comment (by phoudoin):
Replying to [comment:2 humdinger]:
> Can anyone come up with a better sniffer rule? It looks like after that
first sync byte, there isn't much to analyze (s.
[http://en.wikipedia.org/wiki/MPEG_transport_stream#Packet wikipedia]), or
is there?
Our sniffer rule syntax don't support a repeat mode, otherwise a way
better rule for MPEG files would be simply to check the sync 0x47 ('G')
byte every 188 bytes, not just first one.
While a repeat pattern could be hard to implement, what could be done
quickly is to support combining patterns with & (AND), not just with |
(OR) as today.
That would make this rule :
{{{
"0.9 ('G' & [188] 'G' & [376] 'G' & [564] 'G')"
}}}
...detecting better MP2+ content.
--
Ticket URL: <http://dev.haiku-os.org/ticket/9193#comment:10>
Haiku <http://dev.haiku-os.org>
Haiku - the operating system.
Other related posts:
