Permission denied for /tmp directory using ffmpeg

[Dan_L]

Hi all,

I’m attempting to use pydub to convert an uploaded mp3 to a wav file.
All packages and dependencies are installed (via requirements.txt and packages.txt)

Under the hood pydub uses ffmpeg, so when this line is called:

sound = AudioSegment.from_mp3(uploaded_file)

Seems ffmpeg attempts to create a tempfile and is getting denied:

[cache @ 0x55a98290f980] [TEMPFILE @ 0x7ffd9fbf6320] ff_tempfile: Cannot open temporary file /tmp/ffcache6vBwsa
[cache @ 0x55a98290f980] Failed to create tempfile
cache:pipe:0: Permission denied

App is here:
https://share.streamlit.io/dlasusa/2022-03-16_speech_to_text/main_code_file.py

[Franky1]

Please provide a link to your github repo, your streamlit app is not accessible.

[Dan_L]

Should be public now. Sorry, first time working with streamlit, hadn’t notice the share and permissions thing.

[Franky1]

Anyway, please give us the link to the github repo. The linked github repo seems to be different.

[Franky1]

I think the reason for this error is that pydub makes some strange things with Temporaryfile, which I do not understand at first glance.

A quick fix ist to use libav instead of ffmpeg and the error is gone.
Pydub prefers libav over ffmpeg if it is installed.
Just add to your packages.txt file:

libav-tools
libavcodec-extra

[Dan_L]

Oh nice! I fought most of the night with pydub and the tempfile issue and couldn’t figure out a way around. I think the Temporaryfile is actually coming from ffmpeg, so by switching to libav like you suggested, it all works now! Thanks so much! Sorry for the late reply.