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Today, I’d to update some notebook files and the build process fails like so: Step 39/52 : RUN apt-get -qq update & apt-get install -yes -no-install-recommends ffmpeg & apt-get -qq purge & apt-get -qq clean & rm -rf /var/lib/apt/lists/* The first build 6 days ago was successful. Additionally, a apt file is used to install the ffmpeg package for the OS to be used later for notebooks using mathplotlib animations.
But I want to have a flexible solution with possibly overlapping audio streams.I created a Binder repo based on a requirements file. There are again 2 beeps, at 0 and 1 second. Īnother test with another ffmpeg version 5.1 Copyright (c) 2000-2022 the FFmpeg developers built with Apple clang version 13.1.6 (clang-1316.0.21.2.5):įfmpeg -i beep.mp3 -filter_complex "adelay=1000 aevalsrc=0:d=5 amix=inputs=2:duration=longest" -codec:a libmp3lame -q:a 4 output.mp3 I added a silent stream as input as well without improvement.
I added also a silent input file from 0 to 1 seconds without any alteration of the outcome. And finally, a coded transforms it into an output mp3.Īnother short version: 2 delayed beeps, an finally there come 3 beeps out 0, 1, 2 seconds): ffmpeg -i beep.mp3 -filter_complex "adelay=1000 adelay=2000 amix=inputs=2:duration=longest" -codec:a libmp3lame -q:a 4 output.mp3įfmpeg version N-110011-gf456c192d9-tessus on a Mac M1, downloaded as binary from (01.2023). The complex filter delays the inputs by 1, 2, 3 seconds input-wise. The ffmpeg processes three input files (mp3). ffmpeg -i in0.mp3 -i in1.mp3 -i in2.mp3 -filter_complex "adelay=1000 adelay=2000 adelay=3000 amix=inputs=3:duration=longest" -codec:a libmp3lame -q:a 4 output.mp3 In the following example, the in0 is played at t=0. If there are several inputs, then it replicates one after the other (after in0 finishes with its duration duration(in0), plays another one at t=duration(in0), etc.) Ffmpeg plays audio inputs delayed to t1, t2 etc at t=0.
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