Expanding split_on_silence with minimum length / file size?

[hclivess]

Would it be easy/possible to combine minimum chunk length or minimum file size with splitting on silence? I would like to split large files in the silence gaps, but I want the files to be no less than x minutes.

[jiaaro]

@hclivess My advice is to use pydub.silence.split_on_silence() and then recombine the segments as needed so that you have files that are roughly the size you're targeting.

something like

from pydub import AudioSegment
from pydub.silence import split_on_silence

sound = AudioSegment.from_file("/path/to/file.mp3", format="mp3")
chunks = split_on_silence(
    sound,

    # split on silences longer than 1000ms (1 sec)
    min_silence_len=1000,

    # anything under -16 dBFS is considered silence
    silence_thresh=-16, 

    # keep 200 ms of leading/trailing silence
    keep_silence=200
)

# now recombine the chunks so that the parts are at least 90 sec long
target_length = 90 * 1000
output_chunks = [chunks[0]]
for chunk in chunks[1:]:
    if len(output_chunks[-1]) < target_length:
        output_chunks[-1] += chunk
    else:
        # if the last output chunk is longer than the target length,
        # we can start a new one
        output_chunks.append(chunk)

# now your have chunks that are bigger than 90 seconds (except, possibly the last one)

Alternatively, you can use pydub.silence.detect_nonsilent() to find the ranges and make your own decisions about where to slice the original audio

[hclivess]

Awesome, thank you very much. I will repost this code to StackExchange if you don't mind

[jiaaro]

@hclivess oh, I see the question - will post it there too :)