How to convert uploaded video and get a screenshot from this file?

Question

Hi, I'm building a cms and I want users to be able to upload videos but I'm not familiar with video upload & conversion. Is there an example or has anybody coded a solution like this? I heard about ffmpeg but I don't know how to integrate it with asp.net.

As simple solution I can make my clients upload flv files but then I would still need to get a screenshot from that fvl.

Thanks

Answer 1

I've used ffmpeg, but I found it easier to just use the pre-compiled .exe version. So in the backend, I would just launch ffmpeg.exe with the required command-line arguments to do the conversion, let it run and when it was finished the completed file was all ready to go.

Answer 2

Answering author's question:

Does ffmpeg requires to be installed server side or just exe is enough?

ffmpeg.exe will be enough, no installation is required.

The code below gets a screenshot on captureTime on video specified by videoFilename variable, and saves it to the imageFilename path.

Process ffmpeg = new Process();
ffmpeg.EnableRaisingEvents = true;
ffmpeg.StartInfo = new ProcessStartInfo
{
    FileName = this.ffmpegPath,
    Arguments = string.Format(
        "-i \"{0}\" -an -y -s 320x240 -ss {1} -vframes 1 -f image2 \"{2}\"",
        this.videoFilename,
        DateTime.MinValue.Add(this.captureTime).ToString("HH:mm:ss:ff", CultureInfo.InvariantCulture),
        this.imageFilename
    ),
    WorkingDirectory = this.workingDirectory,
    UseShellExecute = false,
    RedirectStandardError = true,
    RedirectStandardOutput = true,
    WindowStyle = ProcessWindowStyle.Hidden
};

ffmpeg.Start();
ffmpeg.WaitForExit(this.timeout);