Page MenuHome

Outputing mpeg (audio in AC3 format) causes audio to become buggy.
Closed, ResolvedPublic

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.

Details

Type
Bug

Event Timeline

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

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

Peter Schlaile (schlaile) closed this task as Resolved.Dec 5 2010, 5:16 PM

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.

well, most of the time,
I start with a high bitrate and work my way down,
until trouble begins to start :)

Cheers,
Peter

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.