Newest 'ffmpeg' Questions - Stack Overflow

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  • Output FFMPEG progress via Node

    14 juin 2016, par ErraticFox

    I am building a desktop app with Node.js and Electron. This app is only client side, there is no servers and uses FFMPEG. I've seen there's a way to display the progress via PHP, but I was wondering if I was able to do this via Node.

    I found this, but I can't seem to get it to output progress. The code below is what I am using for that Node Module and the console only logs [] after conversion is complete.

    var inputDir = uploadFile.files[0].path
        var spawn = require('child_process').spawn
        var ffmpegBin = require('ffmpeg-static'),
            progressStream = require('ffmpeg-progress-stream')
        var params = [
            '-y',
            '-i',
            inputDir,
            "C:\\Users\\ErraticFox\\Desktop\\output.mp3"
        ]

        ffmpeg = spawn(ffmpegBin.path, params);
        ffmpeg.stderr
            .pipe(progressStream(120))
            .pipe(concat(function(data) {
                results = data;
                console.log(data)
            }))

  • Reading images from AXIS ip camera using OpenCV

    14 juin 2016, par batuman

    I am trying to access AXIS IP camera from my program using OpenCV. My OpenCV version is 3.1. I follow this tutorial link.

    I have all libraries installed. My following program can load mp4 video successfully. That means ffmpeg and necessary libraries are working fine.

    #include 
#include opencv.hpp>

using namespace std;
int main() {
    cv::VideoCapture vcap("test.mp4");
    cv::Mat image;
//    const string address = "rtsp://root:pass@192.168.0.90/axis-media/media.amp?camera=1";
//    if(!vcap.open(address)){
//      std::cout << "Error opening video stream or file " << std::endl;
//      return -1;
//    }
    for(;;){
        if(!vcap.read(image)){
            std::cout << "No frame" << std::endl;
            cv::waitKey(0);
        }
        cv::imshow("Display", image);
        cv::waitKey(1);
    }
    return 0;
}

    When I tried to access the IP Camera as follow

    cv::VideoCapture vcap("rtsp://root:pass@192.168.0.90/axis-media/media.amp?camera=1");

    I have the following error

    GStreamer Plugin: Embedded video playback halted; module source reported: Could 
not open resource for reading and writing.
OpenCV Error: Unspecified error (GStreamer: unable to start pipeline
) in cvCaptureFromCAM_GStreamer, file /home/Softwares/opencv/opencv/modules
/videoio/src/cap_gstreamer.cpp, line 818
terminate called after throwing an instance of 'cv::Exception'
  what():  /home/Softwares/opencv/opencv/modules/videoio/src/cap_gstreamer.
cpp:818: error: (-2) GStreamer: unable to start pipeline
 in function cvCaptureFromCAM_GStreamer

    User is root and password is pass and ip 192.168.0.90 are all defaults.

    My if config gave me

    ifconfig
eth0      Link encap:Ethernet  HWaddr b8:2a:72:c6:b8:13  
          inet6 addr: fe80::ba2a:72ff:fec6:b813/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:723959 errors:0 dropped:0 overruns:0 frame:0
          TX packets:116637 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:199422245 (199.4 MB)  TX bytes:13701699 (13.7 MB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:24829 errors:0 dropped:0 overruns:0 frame:0
          TX packets:24829 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:2502903 (2.5 MB)  TX bytes:2502903 (2.5 MB)

wlan0     Link encap:Ethernet  HWaddr a0:a8:cd:99:92:60  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

    What could be the problem for this access to the camera?

    Thanks

  • Is there a Mac OS X equivalent of Windows' named pipe

    14 juin 2016, par Mike Versteeg

    In windows I use named pipes to interface to a console program (ffmpeg). Thought I had a try rewriting this for the Mac, but I cannot find named pipe support in either FireMonkey or even native OS X code. Does it exist at all?

  • Possible to output FFMPEG progress via Node ?

    14 juin 2016, par ErraticFox

    I am building a desktop app with Node.js and Electron. This app is only client side, there is no servers and uses FFMPEG. I've seen there's a way to display the progress via PHP, but I was wondering if I was able to do this via Node.

    I found this, but I can't seem to get it to output progress. The code below is what I am using for that Node Module and the console only logs [] after conversion is complete.

    var inputDir = uploadFile.files[0].path
        var spawn = require('child_process').spawn
        var ffmpegBin = require('ffmpeg-static'),
            progressStream = require('ffmpeg-progress-stream')
        var params = [
            '-y',
            '-i',
            inputDir,
            "C:\\Users\\ErraticFox\\Desktop\\output.mp3"
        ]

        ffmpeg = spawn(ffmpegBin.path, params);
        ffmpeg.stderr
            .pipe(progressStream(120))
            .pipe(concat(function(data) {
                results = data;
                console.log(data)
            }))

  • JavaCV FFmpegFrameRecorder Video output reddish color

    14 juin 2016, par Diego Perozo

    I am trying to make a video .mp4 file out of a group of images using FFmpegFrameRecorder as a part of a bigger program, so I set up a test project in which I try to make a video out of 100 instances of the same frame at 25fps. The program seems to work. However, every time I run it the image seems to be reddish. As if a red filter had been applied to it.

    Here's the code snippet:

    public static void main(String[] args) {
    File file = new File("C:/Users/Diego/Desktop/tc-images/image0.jpg");
    BufferedImage img = null;
    try {
        img = ImageIO.read(file);
    } catch (IOException e1) {
        e1.printStackTrace();
    }
    IplImage image = IplImage.createFrom(img); 
    FFmpegFrameRecorder recorder = new FFmpegFrameRecorder("C:/Users/Diego/Desktop/tc-images/test.mp4",1920,1080); 
    try { 
    recorder.setVideoCodec(13);
    recorder.setFormat("mp4");
    recorder.setPixelFormat(0);
    recorder.setFrameRate(25);
    recorder.start(); 
    for (int i=0;i<100;i++){ 
    recorder.record(image); 
    } 
    recorder.stop(); 
    } 
    catch (Exception e){ 
    e.printStackTrace(); 
    } 
}

    I'd appreciate it if anybody told me what's wrong. Thanks in advance for any help.

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