Linux - Audio Mixdown - flac audio isnt created correctly #52488

New Issue

Carlo Andreacchio · 2017-08-22T07:53:43+02:00

Carlo Andreacchio commented

2017-08-22 07:53:43 +02:00

System Information
Linux x64
Blender Version
Broken: b94a433ca3

Short description of error
flac audio generation isnt generated cleanly

Exact steps for others to reproduce the error

Open attached blend file
export audio flac
add this flac file back into blender
notice how it is 0 frames long
repeat on windows
flac file is correct length and read correctly.
bug.blend

**System Information** Linux x64 **Blender Version** Broken: b94a433ca34 **Short description of error** flac audio generation isnt generated cleanly **Exact steps for others to reproduce the error** 1. Open attached blend file 2. export audio flac 3. add this flac file back into blender 4. notice how it is 0 frames long 5. repeat on windows 6. flac file is correct length and read correctly. [bug.blend](https://archive.blender.org/developer/F721054/bug.blend)

Carlo Andreacchio commented

2017-08-22 07:53:43 +02:00

Changed status to: 'Open'

Carlo Andreacchio commented

2017-08-22 07:53:43 +02:00

Added subscriber: @candreacchio

Bastien Montagne commented

2017-08-26 15:49:18 +02:00

Added subscribers: @neXyon, @mont29

Joerg Mueller was assigned by Bastien Montagne

2017-08-26 15:49:18 +02:00

Bastien Montagne commented

2017-08-26 15:49:18 +02:00

The export seems to be working OK, it’s the import back into Blender that is broken somehow. Note that reading generated .flac in player (like default gnome one) does work.

@neXyon this is probably one for you?

The export seems to be working OK, it’s the import back into Blender that is broken somehow. Note that reading generated .flac in player (like default gnome one) does work. @neXyon this is probably one for you?

Carlo Andreacchio commented

2017-08-27 00:31:59 +02:00

Loading windows created flacs back in on Linux blender are correct length

There's also another bug which may or may not be related that FLAC creation stops early on long sequences (20-30k frames). Will report it as a separate bug if it's not related

Loading windows created flacs back in on Linux blender are correct length There's also another bug which may or may not be related that FLAC creation stops early on long sequences (20-30k frames). Will report it as a separate bug if it's not related

Joerg Mueller commented

2017-09-01 12:24:19 +02:00

I can't reproduce this bug. Can you tell me which distribution and version you are on and how you get blender? Official builds, distribution builds or self built? I guess it's a faulty ffmpeg version that causes this, probably not much we can do.

Carlo Andreacchio commented

2017-09-02 02:24:23 +02:00

Ubuntu 17,04
Official build bot - b94a433ca3
Self built - e476298084 (this just reports an error loading the flac, not same error as above)

Ubuntu 17,04 Official build bot - b94a433ca3 Self built - e476298084 (this just reports an error loading the flac, not same error as above)

Joerg Mueller commented

2017-09-05 15:51:09 +02:00

Added subscriber: @Sergey

Joerg Mueller commented

2017-09-05 15:51:09 +02:00

Ok I can reproduce the bug with a buildbot build, but it's not a debug build, so it's hard to track down the error. @Sergey can you help? Which linux is the buildbot running and which ffmpeg/libsndfile version? Is it a self built one? Can I get it somehow?

Joerg Mueller commented

2017-09-05 16:03:29 +02:00

I just saw that the buildbots build without libsndfile, so the cause could/should be ffmpeg. Do you build with libsndfile @candreacchio ?

Sergey Sharybin commented

2017-09-05 16:13:09 +02:00

@neXyon, buildbot/release environment was silently ignoring sndfile. Making tweaks now to enable it back (as per blender_full.cmake).

Buildbot is based on Debian Jessie, with sndfile installed from repository, ffmpeg is 3.2.1. if enabling sndfile doesn't solve the issue i can share all self-compiled libraries from /opt/lib if you'd like.

@neXyon, buildbot/release environment was silently ignoring sndfile. Making tweaks now to enable it back (as per blender_full.cmake). Buildbot is based on Debian Jessie, with sndfile installed from repository, ffmpeg is 3.2.1. if enabling sndfile doesn't solve the issue i can share all self-compiled libraries from /opt/lib if you'd like.

Joerg Mueller commented

2017-09-05 16:42:16 +02:00

Thanks @Sergey ! With libsndfile disabled I can reproduce the error with ffmpeg.

Then I tried blender2.8 where everything works, since the new audaspace uses newer ffmpeg API. Now we have a few options:

We do nothing since it will be fixed with 2.8 and 2.79 official should be working since it uses libsndfile.
I can backport from 2.8 and we drop the old ffmpeg code, releasing the new one with 2.79 (would drop support for older ffmpeg versions, don't know how old though... so far nobody reported problems with building the 2.8 ffmpeg audaspace code).
I shoot myself, because ffmpeg...

What's your suggestion @Sergey ?

Thanks @Sergey ! With libsndfile disabled I can reproduce the error with ffmpeg. Then I tried blender2.8 where everything works, since the new audaspace uses newer ffmpeg API. Now we have a few options: 1. We do nothing since it will be fixed with 2.8 and 2.79 official should be working since it uses libsndfile. 2. I can backport from 2.8 and we drop the old ffmpeg code, releasing the new one with 2.79 (would drop support for older ffmpeg versions, don't know how old though... so far nobody reported problems with building the 2.8 ffmpeg audaspace code). 3. I shoot myself, because ffmpeg... What's your suggestion @Sergey ?

Sergey Sharybin commented

2017-09-05 16:46:43 +02:00

@neXyon, let me finish getting buildbot up and running again (stupid nvcc crashes on sm20/sm21 kernels, keeps time to get past that to get fresh builds). If the new buildbot will work, i think we can consider the issue as resolved.

We definitely don't want you to shoot yourself!

@neXyon, let me finish getting buildbot up and running again (stupid nvcc crashes on sm20/sm21 kernels, keeps time to get past that to get fresh builds). If the new buildbot will work, i think we can consider the issue as resolved. We definitely don't want you to shoot yourself!

Joerg Mueller commented

2017-09-08 12:52:31 +02:00

Hey @Sergey I just checked the build bots, while the 64 bit linux builds still fail, I checked both 32 and 64 bit and they now both have WITH_CODEC_SNDFILE as ON. So we can consider this resolved?

Sergey Sharybin commented

2017-09-08 13:04:28 +02:00

@neXyon, think so. Will try to get buildsbots running later today.

Sergey Sharybin commented

2017-09-14 16:58:28 +02:00

Changed status from 'Open' to: 'Resolved'

Sergey Sharybin closed this issue

2017-09-14 16:58:28 +02:00

Sergey Sharybin commented

2017-09-14 16:58:28 +02:00

@neXyon, all buildbots should be up, and both 2.79 and latest buildbots are supposed to have sndfile enabled. So think the issue can be considered fully resolved now.

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Linux - Audio Mixdown - flac audio isnt created correctly #52488