rtsp to mp4 stream, could not write header

[mStirner]

Version information

• fluent-ffmpeg version: 2.1.2
• ffmpeg version: 2.8.15
• OS: Ubuntu 16.04 LTS

Code to reproduce

    app.get("/dmax", (req, res) => {

        res.type('mp4');

        let command = ffmpeg();


        command.input("rtsp://192.168.2.1:554/?freq=466&bw=8&msys=dvbc&mtype=256qam&sr=6900&specinv=1&pids=0,16,17,18,20,115,2291,2292,2294,2296");

        command.outputOptions('-c:v libx264');
        command.outputOptions("-c:a mp3");
        command.outputOptions("-movflags faststart");

        command.outputOptions('-f mp4');

        command.pipe(res, {
            end: true
        });

        command.on('start', function (cli) {
            console.log('Spawned Ffmpeg with command: %s', cli);
        });

        command.on('error', function (err) {
            console.log('An error occurred: ' + err.message);
        });

        command.on('end', function () {
            console.log('Processing finished !');
        });

        //command.run();

    });

Expected results

Converting the RTSP stream from the fritz.box router to h265/mp4 http stream

Observed results

An error occurred: ffmpeg exited with code 1: Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument

---

I'm trying to convert the RTSP stream that my firtz.box router publish in my local network to a http mp4/h264 stream.

Working CLI: ffmpeg -i 'rtsp://192.168.2.1:554/?freq=466&bw=8&msys=dvbc&mtype=256qam&sr=6900&specinv=1&pids=0,16,17,18,20,115,2291,2292,2294,2296' -c:v libx264 -c:a mp3 -movflags faststart -f mp4 video.mp4
With code changes to:

command.input("'rtsp://192.168.2.1:554/?freq=466&bw=8&msys=dvbc&mtype=256qam&sr=6900&specinv=1&pids=0,16,17,18,20,115,2291,2292,2294,2296'");

it get the error: No such file or directory