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I'm using VSE to create small video clips. I create the clips using python and render everything in the background. Now I am trying to add audio to my clips. This works on my local machine. This is the line I run:

blender -b --python test.py -o //out -a

However, I am trying to run this on a google cloud machine and I get the following error: 

AL lib: (WW) alc_initconfig: Failed to initialize backend "pulse"
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4292:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4292:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4292:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4771:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM default
AL lib: (EE) ALCplaybackAlsa_open: Could not open playback device 'default': No such file or directory

I think the issue is because there is no sound card on the google cloud machine, and I don't think its possible for me to add one.

Thanks!

EDIT: I'm adding that the above are just warnings. The video is rendered fine, only there is no audio present.

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Yes, it's because you need a sound-card.

That's unfortunate!

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  • $\begingroup$ Why do I need a sound card to render the audio? I can use ffmpeg to add audio just fine. $\endgroup$ – Cole Feb 27 at 9:04
  • $\begingroup$ Blender is probably trying to find one, or something that is related. are the FFMPEG files in the correct area, double check this, and make sure that you have all of the dependencies that you would need. if you read the errors, it says "file not found" there might be something that is related to that, are there some files that you forgot - or perhaps FFMPEG didn't download the correct files, versions matter, and there are many issues with rendering without a soundcard that I wouldn't recommend. $\endgroup$ – 84v Feb 27 at 9:13
  • $\begingroup$ forum.ableton.com/viewtopic.php?t=64228 - this may help a little bit, on the issues that you might be having. $\endgroup$ – 84v Feb 27 at 9:17
  • $\begingroup$ and at the end - cannot find playback: "default" you might want to look into that. $\endgroup$ – 84v Feb 27 at 9:18
  • $\begingroup$ AL lib: (EE) ALCplaybackAlsa_open: Could not open playback device 'default': No such file or directory it's not finding somewhere to playback, whereas FFMPEG gives you that option. $\endgroup$ – 84v Feb 27 at 9:20

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