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[Gnash-commit] [bug #35547] Gnash seeks on an event sound incorrectly

From: Nachanon Vetjasit
Subject: [Gnash-commit] [bug #35547] Gnash seeks on an event sound incorrectly
Date: Thu, 16 Feb 2012 14:37:23 +0000
User-agent: Opera/9.80 (Windows NT 5.1; U; en) Presto/2.9.168 Version/11.51


                 Summary: Gnash seeks on an event sound incorrectly
                 Project: Gnash - The GNU Flash player
            Submitted by: nachanon
            Submitted on: Thu 16 Feb 2012 02:37:22 PM GMT
                Category: None
                Severity: 3 - Normal
                 Release: 0.8.9
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any



Hello, I've used Gnash 0.8.9 and 0.8.10 to play Flash 7 file that tries to
play sound within ActionScript 2.0, using the code:

snd=new Sound(this);

trace("sound: starting");

It supposed to play sound from offset '1.0' sec with repeat value '0' (which
Flash Player will treat it like a repeat value '1'; playing the sound once)

Which this sound has three part:
0.000-1.000 sec: the sound of C5 note (low pitch)
1.000-1.300 sec: the sound of C7 note (high pitch)
1.300-2.300 sec: the sound of C6 note (middle pitch)

Specifying offset '1.0' sec was supposed to skip the first part (low pitch)
completely, and playing from the start of second part (high pitch) to the end
(middle pitch).

But on Gnash, you will hear the first part slipped through, which means Gnash
was seeking to about ~0.1 sec earlier than the intended position.
This is a 'correct' result from Macromedia Flash Player 7 
You will notice that sound was high pitch followed by middle pitch, and was
played only once.
This is a video result from Gnash 0.8.10
You will notice that you could hear a bit of low pitch (the first part) sound
on the start.
And sound was looped infinitely, which was a symptom of bug #35545
(zero-repeat issue), with a gap between loop which likely to be a symptom of
bug #24481 (actionscript sound loop gap).
This is my dummy flash file (created from Flash MX 2004), accompanied with
source code and the sound, also attached here.

Gnash: gnash_0.8.9-1~lenny and gnash_0.8.10-1~lenny from APT
repository (both give exactly same result) 
System: Debian GNU/Linux 5.0 Lenny on i386


File Attachments:

Date: Thu 16 Feb 2012 02:37:22 PM GMT  Name:  Size:
30kB   By: nachanon
Dummy test flash file (Flash 7)


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