bugGnash - The GNU Flash player - Bugs: bug #24686, Apparent sound-related bug in...


bug #24686: Apparent sound-related bug in audio slideshow

Submitter:  Benjamin Wolsey <bwy>
Submitted:  Wed 29 Oct 2008 10:55:33 AM UTC
Category:  sound Severity:  3 - Normal
Release:  None Status:  None
Privacy:  Public Assigned to:  strk
Open/Closed:  Open
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Thu 27 Nov 2008 01:25:56 PM UTC, comment #14: 

As of revno 10365 the slides work, and seem to be synchronized with the audio.

Stop and start work for the slides, not for the audio (also seems to cover the problem of the audio starting automatically). Seek doesn't work for either.

Benjamin Wolsey <bwy>
Group Member
Thu 27 Nov 2008 08:37:10 AM UTC, comment #13: 

At time of ::stop() call, no SoundInputStream is plugged yet
(as sound isn't realized yet) so ::stop() is a no-op.

I guess we may use the PlayHead class in Sound too..

Sandro Santilli <strk>
Group Member
Thu 27 Nov 2008 08:33:32 AM UTC, comment #12: 

Ah, now I see.
There's a Sound.stop() call.
Then Sound.start(0) is called again when you click the play button.

Sandro Santilli <strk>
Group Member
Thu 27 Nov 2008 08:29:15 AM UTC, comment #11: 

The sound that starts is:

It is loaded using Sound.loadSound(<url>, 1).
Second argument means 'streaming'.
When streaming, the sound starts while being loaded as per documentation. Might need some buffering, but we saw _soundbuftime is set to zero.

Sandro Santilli <strk>
Group Member
Thu 27 Nov 2008 08:27:51 AM UTC, comment #10: 

UNIMPLEMENTED: MovieClip._soundbuftime=[number:0]

.. doesn't seem related to the start then

Sandro Santilli <strk>
Group Member
Thu 27 Nov 2008 08:24:27 AM UTC, comment #9: 

UNIMPLEMENTED: MovieClip._soundbuftime setting

^^ could be related to the premature start

Sandro Santilli <strk>
Group Member
Thu 27 Nov 2008 08:09:15 AM UTC, comment #8: 

in Gnash, sound starts immediately on load, with pp it takes an hit of 'play' button for that to happen.

Sandro Santilli <strk>
Group Member
Thu 27 Nov 2008 07:46:49 AM UTC, comment #7: 

That number was AV_NOPTS_VALUE, now taken as zero (still not correct, but reduces frames container management)

Sandro Santilli <strk>
Group Member
Thu 27 Nov 2008 07:22:56 AM UTC, comment #6: 

This is interesting:

 DEBUG: 0-to-last element has timestamp 18344262162188942992 > 51878

That's with FFMPEG parsing the mp3.
The firsit timestamp is that huge number:
FFMPEG packet dts:-9223372036854775808, pts:-9223372036854775808

Sandro Santilli <strk>
Group Member
Wed 26 Nov 2008 09:11:29 PM UTC, comment #5: 

The movie contains traces, traces from pp and gnash don't match.
In Gnash, we get more 'loading ##' traces, pp stops at 6, gnash keeps going, no idea why.
Also, there's a mismatch in order between 'loading 4' and 'PRE-LOADED SECTION' (could be one of those action execution order things)

Sandro Santilli <strk>
Group Member
Tue 18 Nov 2008 04:20:43 PM UTC, comment #4: 

No more a blocker, as we handle the exception now...

Sandro Santilli <strk>
Group Member
Wed 29 Oct 2008 11:19:10 AM UTC, comment #3: 

marking to blocker for the unhandled exception

Sandro Santilli <strk>
Group Member
Wed 29 Oct 2008 11:09:45 AM UTC, comment #2: 

Implementing Sound.getBytesTotal() and Sound.getBytesLoaded() does make the SWF get off the loading screen.

The sound should not start playing immediately (it does), but rather wait for the play button to be pressed.

The slider at the bottom doesn't show the correct position (getPosition?), and the slideshow images don't change.

Benjamin Wolsey <bwy>
Group Member
Wed 29 Oct 2008 10:59:50 AM UTC, comment #1: 

And I get

terminate called after throwing an instance of 'gnash::SoundException'
  what():  Kann Aux-SDL-Audioausgabe nicht starten: No available audio device

when the audio device isn't available.

Benjamin Wolsey <bwy>
Group Member
Wed 29 Oct 2008 10:55:33 AM UTC, original submission:  

The BBC slideshow SWF, an example here:


gets stuck on the loading frame, though the sound plays.

There are three UNIMPLEMENTEDs: Sound.getBytesLoaded(), Sound.getBytesTotal() and MovieClip._soundbuftime. The first two seem to be implemented in the Gnash Sound class, but not passed on to actionscript. MovieClip._soundbuftime just isn't implemented. "Fixing" the first two unfortunately doesn't fix the movie.

(this SWF is used a lot on the BBC site)

Benjamin Wolsey <bwy>
Group Member


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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2008-11-18 strk Severity5 - Blocker 3 - Normal
    2008-10-29 strk CategoryNone sound
        Severity3 - Normal 5 - Blocker

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