英文:
Mix multiple audios into one with FFmpeg
问题
我有许多音频文件，我想将它们混合成一个音频文件，然后听起来就好像所有的音频都在同一时间播放。
我尝试使用最后一个命令中的 amix 滤镜，但出现错误 "在过滤器 Parsed_amix_0 上找不到匹配的未标记输入面板 1".
> inputs.txt
n=0
for file in *.mp3; do
echo "file '$file'" >> inputs.txt
((n++))
done
ffmpeg -f concat -i inputs.txt -filter_complex amix=inputs=$n output.mp3
如果我手动解析输入文件（例如 2 个文件），如下所示
ffmpeg -i file1.mp3 -i file2.mp3 -filter_complex amix=inputs=2 output.mp3
该命令按预期工作。但我需要它能够处理任意数量的输入。
英文:
I have a lot of audio files I want to mix down into one audio file, that then should sound like as if all audios would play at the same time.
I tried to use the amix filter in the last command, but it fails with "Cannot find a matching stream for unlabeled input pad 1 on filter Parsed_amix_0".
> inputs.txt
n=0
for file in *.mp3; do
echo "file '$file'" >> inputs.txt
((n++))
done
ffmpeg -f concat -i inputs.txt -filter_complex amix=inputs=$n output.mp3
If I manually parse the inputs files (e.g. 2 files) as follows
ffmpeg -i file1.mp3 -i file2.mp3 -filter_complex amix=inputs=2 output.mp3
the command works as intended. But I need it to work with an arbitrary amount of inputs.
答案1
得分: 0
看起来一些命令行工具更适合处理大量输入文件。
使用 sox，命令相当简单：
sox -m *.wav outputsox.wav
这里有一个使用 ffmpeg 的 Bash 脚本，它以音频/视频文件作为输入参数，将它们转换为 .wav 文件并与 amix 混合。
inputs=()
for f in "$@"; do
ffmpeg -i "$f" -vn -acodec pcm_s16le "${f%.*}.wav"
inputs+=("-i" "${f%.*}.wav")
done
ffmpeg "${inputs[@]}" -filter_complex amix=inputs=$# output.mp3
英文:
It seems some command line tools are easier for dealing with a large amount of input files.
Using sox, the command is rather simple:
sox -m *.wav outputsox.wav
And here is a Bash script using ffmpeg, that takes audio-/video-files as input arguments, converts them to .wav-files and mixes them with amix.
inputs=()
for f in "$@"; do
ffmpeg -i "$f" -vn -acodec pcm_s16le "${f%.*}.wav"
inputs+=("-i" "${f%.*}.wav")
done
ffmpeg "${inputs[@]}" -filter_complex amix=inputs=$# output.mp3
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