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Blender 2.6 Bug Tracker: Browse
[#25050] Outputing mpeg (audio in AC3 format) causes audio to become buggy.
Date:
2010-12-05 12:19
Priority:
3
State:
Closed
Submitted by:
A Saurus1 (
a_saurus1
)
Assigned to:
Peter Schlaile (schlaile)
Category:
Audio
Status:
Fixed / Closed
Relates to:
Duplicates:
Patches:
Summary:
Outputing mpeg (audio in AC3 format) causes audio to become buggy.
Detailed description
I tried rendering out an animation the other day and when I played the output file back in VLC, the sound was all buggy. It seems there is some problem encoding audio with FFmpeg or something, because it's all broken. In VLC, the audio was missing, replaced by electronic clicks and whistles (really weird). In WMP, it was just a constant click. No audio what so ever. I've attached an example output file, which is just an image strip and an audio strip, no animation, no anything else, rendered at the default Mpeg DVD preset settings on a Windows 7 x64 machine. I've also uploaded an Mp3 with part of the original sound file on it, so you can hear what it is supposed to sound like.
Hope you can fix this, you guys are great.
Followup
Message
Date
: 2010-12-05 16:47
Sender
:
Peter Schlaile
could you please provide the blend file?
And: you might want to play with audio bitrates, 32 kbit for an AC3 track is - very low.
384 kbit sounds like a sensible start.
Cheers,
Peter
Date
: 2010-12-05 17:16
Sender
:
Peter Schlaile
commited a fix to SVN, that makes presets a lot more sensible here.
At least on a fairly recent ffmpeg git version I had no problems on playing back mpeg files with an AC3 track (I used mplayer).
So: please, reopen, if problem still persists after changing audio bitrates.
Cheers,
Peter
Date
: 2010-12-05 18:37
Sender
:
A Saurus1
Ah. Okay, that worked. BTW, you say 384 sounds sensible for a 'start', but you can't go above that, so why would you 'start' there?
Closed.
Date
: 2010-12-05 18:42
Sender
:
Peter Schlaile
well, most of the time,
I start with a high bitrate and work my way down,
until trouble begins to start :)
Cheers,
Peter
Date
: 2010-12-05 21:07
Sender
:
A Saurus1
Ah. Okay, that worked. BTW, you say 384 sounds sensible for a 'start', but you can't go above that, so why would you 'start' there?
Closed.
Attached Files:
Name
Date
Download
Quite Room.mp3
2010-12-05 12:19
Download
audio bug.mpg
2010-12-05 12:19
Download
Changes:
Field
Old Value
Date
By
close_date
2010-12-05 18:42
2010-12-05 18:42
schlaile
Resolution
None
2010-12-05 17:16
schlaile
close_date
2010-12-05 17:16
2010-12-05 17:16
schlaile
status_id
Open
2010-12-05 17:16
schlaile
assigned_to
none
2010-12-05 16:27
schlaile
File Added
13973: audio bug.mpg
2010-12-05 12:19
a_saurus1
File Added
13972: Quite Room.mp3
2010-12-05 12:19
a_saurus1
