"File Already Exists" error

[jeff-hykin]

(This project is awesome BTW)

Even when randomly generating a unique output file, there is the error:

File '/data/output0.20456638176621045.mp4' already exists. Overwrite ? [y/N] Not overwriting - exiting

Output file argument: `/data/output${Math.random()}.mp4`

Here's the full code:

let ffmpegFunc = require("ffmpeg.js/ffmpeg-mp4.js")
let ffmpeg = (...args)=>ffmpegFunc({
    mounts: [{ type: "NODEFS", opts: {root: "."}, mountpoint: "/data" }],
    arguments: [
        "-noaccurate_seek", "-ss", "00:00:05.0",
        "-i", "/data/test.mp4",
        "-to", "00:00:15.0", "-c", "copy",
        `/data/output${Math.random()}.mp4`
    ],
    print: data=>console.log(data),
    printErr: data=>console.error(data),
    onExit: exitCode=>console.log(`FFMPEG exited with code ${exitCode}`),
})

[Kagami]

Yes, it's a problem with NODEFS, I haven't find the reason yet. Use -y option as a workaround.

[jeff-hykin]

I was actually going to post the workaround, but you responded faster than I could type it! haha.

Adding "-y" does successfully creates the output video for me. Here's the code for reference for anyone else looking.

let ffmpegFunc = require("ffmpeg.js/ffmpeg-mp4.js")
let ffmpeg = (...args)=>ffmpegFunc({
    mounts: [{ type: "NODEFS", opts: {root: "."}, mountpoint: "/data" }],
    arguments: [
        "-y",
        "-noaccurate_seek", "-ss", "00:00:05.0",
        "-i", "/data/test.mp4",
        "-to", "00:00:15.0", "-c", "copy",
        `/data/output${Math.random()}.mp4`
    ],
    print: data=>console.log(data),
    printErr: data=>console.error(data),
    onExit: exitCode=>console.log(`FFMPEG exited with code ${exitCode}`),
})