Spleeter: [Discussion] It's possible to use pipe with Spleeter?

[Slidix99]

I'm on Ubuntu and i've videos files.
I will know if it's possible to use the pipes with Spleeter because i want, firstly, convert my video files in wav format and after that use the pipeline with Spleeter and re-use a pipe to create waveforms.
For the moment, i'm trying that :

ffmpeg -i myFile.mp4 -f wav - | spleeter separate -i - -p spleeter:2stems -o separated

but i've errors like that:

Traceback (most recent call last):
File "/home/l2-rd4/workspace/anaconda3/lib/python3.7/multiprocessing/pool.py", line 121, in worker
result = (True, func(args, *kwds))
File "/home/l2-rd4/workspace/anaconda3/lib/python3.7/site-packages/spleeter/audio/ffmpeg.py", line 108, in save
os.makedirs(directory)
File "/home/l2-rd4/workspace/anaconda3/lib/python3.7/os.py", line 221, in makedirs
mkdir(name, mode)
FileExistsError: [Errno 17] File exists: 'separated/-'
"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/home/l2-rd4/workspace/anaconda3/bin/spleeter", line 8, in
sys.exit(entrypoint())
File "/home/l2-rd4/workspace/anaconda3/lib/python3.7/site-packages/spleeter/__main__.py", line 54, in entrypoint
main(sys.argv)
File "/home/l2-rd4/workspace/anaconda3/lib/python3.7/site-packages/spleeter/__main__.py", line 46, in main
entrypoint(arguments, params)
File "/home/l2-rd4/workspace/anaconda3/lib/python3.7/site-packages/spleeter/commands/separate.py", line 45, in entrypoint
separator.join()
File "/home/l2-rd4/workspace/anaconda3/lib/python3.7/site-packages/spleeter/separator.py", line 68, in join
task.get()
File "/home/l2-rd4/workspace/anaconda3/lib/python3.7/multiprocessing/pool.py", line 657, in get
raise self._value
File "/home/l2-rd4/workspace/anaconda3/lib/python3.7/multiprocessing/pool.py", line 121, in worker
result = (True, func(args, *kwds))
File "/home/l2-rd4/workspace/anaconda3/lib/python3.7/site-packages/spleeter/audio/ffmpeg.py", line 108, in save
os.makedirs(directory)
File "/home/l2-rd4/workspace/anaconda3/lib/python3.7/os.py", line 221, in makedirs
mkdir(name, mode)
FileExistsError: [Errno 17] File exists: 'separated/-'
av_interleaved_write_frame(): Broken pipe
Error writing trailer of pipe:: Broken pipe
size= 1304kB time=00:00:06.93 bitrate=1540.9kbits/s speed=0.204x
video:0kB audio:1308kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Conversion failed!

I can do the commands separately but with pipes I've problems . So if you have solutions, I'm listening.
Thanks!

[Faylixe]

Hello and thank you for your suggestion.

Indeed, pipe are not supported as we do not read data from stdin but from file only. One solution for your problem would be to use an intermediate file.

Although I feel like this would be indeed a nice feature to add (through a --stdin parameter). So we will probably consider it in the future.

[Slidix99]

Nice,
Thank you for your reply