Ticket #1039 (new defect)
Loading 5.1 FLAC produces silent audio
| Reported by: | z0rc | Owned by: | |
|---|---|---|---|
| Priority: | normal | Milestone: | |
| Component: | Audio | Version: | devel |
| Severity: | minor | Keywords: | |
| Cc: | Platform: | Windows | |
| Sub Component: | AProvider - FFMS |
Description
When trying to load 5.1 FLAC both with ffmpegsource or avisynth and different avisynth downmixers the resulting audio in Aegisub always is silent, audio spectrum also is clean. Sample audio attached.
Attachments
-
canaan.flac
(4.5 MB) -
added by z0rc 2 years ago.
- sample audio
-
error.jpg
(30.6 KB) -
added by z0rc 2 years ago.
- error screenshot
Change History
Changed 2 years ago by z0rc
-
attachment
canaan.flac
added
comment:1 Changed 2 years ago by TheFluff
The Avisynth provider always uses DirectShowSource. I don't think a dshow flac source filter exists, so what happens is probably that it falls back on FFMS2, resulting in the same behavior no matter which provider you set in the settings.
FFMS2 in turn seems to have problems with it, no idea why. It works if you remux it to MKV (or, well, MKA, strictly speaking), so it might be a libavformat bug. Who knows. I'll poke Myrsloik about it.
comment:2 Changed 2 years ago by z0rc
I've experimented with latest test build (r4089, TheFluff) and found next things. I installed madFlac dshow source filter and decoder. AVS script with single string "DirectShowSource("canaan.flac")" works and Aegisub successfully loads audio from it. But Aegisub still fails trying load it directly. MessageBox screenshot with error attached. Russian text says: "Unable to play file. Format is unsupported".
sample audio