Node.js中的FFMPEG:转换失败

我有一个小的node.js web应用程序。我在get请求中这样使用:

app.get('/api/voice/:gender/:voice/:pitch', function(req, res){
        if(req.params.pitch == "1" || req.params.pitch == "1.0") {
            const file = "./voices/" + req.params.gender.toLowerCase() + "/" + req.params.voice + ".mp3"
            res.download(file);
            return
        }

        const inputFile = "./voices/" + req.params.gender.toLowerCase() + "/" + req.params.voice + ".mp3"
        const output_file = "./Audio/Temp/" + req.params.voice + ".mp3"
        ffmpeg()
                .input(inputFile)
                .audioCodec('pcm_s16le') // Set the audio codec to PCM with 16-bit depth
                .audioFrequency(44100) // Set the sample rate
                .on('error', function(err) {
                    console.error('Error while converting:', err);
                })
                .on('end', function() {
                    // res.download(output_file)
                })
                .save(output_file);

    });

它给 Conversion Failed 错误:

[2024-07-11T18:11:22.880Z] Error while converting: Error: ffmpeg exited with code 1: Conversion failed!

    at ChildProcess.<anonymous> (d:\Dev\Anima\Client\node_modules\fluent-ffmpeg\lib\processor.js:180:22)
    at ChildProcess.emit (d:\Dev\Anima\Client\lib\events.js:519:28)
    at ChildProcess._handle.onexit (d:\Dev\Anima\Client\lib\internal\child_process.js:294:12)
    at Process.callbackTrampoline (node:internal/async_hooks:130:17) {stack: 'Error: ffmpeg exited with code 1: Conversion …Trampoline (node:internal/async_hooks:130:17)', message: 'ffmpeg exited with code 1: Conversion failed!
'}

当我在node.js桌面(.exe)应用程序中使用相同的代码时,它成功运行。当我在express.js应用程序中使用它时,它失败了。错误消息不清楚。问题是什么?