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Sur d’autres sites (5093)

  • When using ffmpeg to compress and create in real time mpeg4 video file from bathc of images getting low quality video how can i improve quality ?

    30 juin 2015, par Brubaker Haim

    The goal here is to create a compressed mp4 video file in real time. I’m saving screenshots as bitmaps type on my hard disk. And i want to create mp4 file and compress the mp4 video file in real time.

    using System;
    
using System.Windows.Forms;
    
using System.Collections.Generic;
    
using System.Linq;
    
using System.Text;
    
using System.Threading.Tasks;
    
using System.Drawing;
    
using System.IO.Pipes;
    
using System.Runtime.InteropServices;
    
using System.Diagnostics;
    
using System.IO;
    
using DannyGeneral;
    

    
namespace Youtube_Manager
    
{
    
    class Ffmpeg
    
    {
    
        NamedPipeServerStream p;
    
        String pipename = "mytestpipe";
    
        System.Diagnostics.Process process;
    
        string ffmpegFileName = "ffmpeg.exe";
    
        string workingDirectory;
    

    
        public Ffmpeg()
    
        {
    
            workingDirectory = Path.GetDirectoryName(Application.ExecutablePath);
    
            Logger.Write("workingDirectory: " + workingDirectory);
    
            if (!Directory.Exists(workingDirectory))
    
            {
    
                Directory.CreateDirectory(workingDirectory);
    
            }
    
            ffmpegFileName = Path.Combine(workingDirectory, ffmpegFileName);
    
            Logger.Write("FfmpegFilename: " + ffmpegFileName);
    
        }
    

    
        public void Start(string pathFileName, int BitmapRate)
    
        {
    
            try
    
            {
    

    
                string outPath = pathFileName;
    
                p = new NamedPipeServerStream(pipename, PipeDirection.Out, 1, PipeTransmissionMode.Byte);
    

    
                ProcessStartInfo psi = new ProcessStartInfo();
    
                psi.WindowStyle = ProcessWindowStyle.Hidden;
    
                psi.UseShellExecute = false;
    
                psi.CreateNoWindow = false;
    
                psi.FileName = ffmpegFileName;
    
                psi.WorkingDirectory = workingDirectory;
    
                psi.Arguments = @"-f rawvideo -vcodec rawvideo -pix_fmt rgb24 -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v mpeg4 -r " + BitmapRate + " " + outPath;
    
                process = Process.Start(psi);
    
                process.EnableRaisingEvents = false;
    
                psi.RedirectStandardError = true;
    
                p.WaitForConnection();
    
            }
    
            catch (Exception err)
    
            {
    
                Logger.Write("Exception Error: " + err.ToString());
    
            }
    
        }
    

    
        public void PushFrame(Bitmap bmp)
    
        {
    
            try
    
            {
    
                int length;
    
                // Lock the bitmap's bits.
    
                //bmp = new Bitmap(1920, 1080);
    
                Rectangle rect = new Rectangle(0, 0, bmp.Width, bmp.Height);
    
                //Rectangle rect = new Rectangle(0, 0, 1280, 720);
    
                System.Drawing.Imaging.BitmapData bmpData =
    
                    bmp.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadOnly,
    
                    bmp.PixelFormat);
    

    
                int absStride = Math.Abs(bmpData.Stride);
    
                // Get the address of the first line.
    
                IntPtr ptr = bmpData.Scan0;
    

    
                // Declare an array to hold the bytes of the bitmap.
    
                //length = 3 * bmp.Width * bmp.Height;
    
                length = absStride * bmpData.Height;
    
                byte[] rgbValues = new byte[length];
    

    
                //Marshal.Copy(ptr, rgbValues, 0, length);
    
                int j = bmp.Height - 1;
    
                for (int i = 0; i < bmp.Height; i++)
    
                {
    
                    IntPtr pointer = new IntPtr(bmpData.Scan0.ToInt32() + (bmpData.Stride * j));
    
                    System.Runtime.InteropServices.Marshal.Copy(pointer, rgbValues, absStride * (bmp.Height - i - 1), absStride);
    
                    j--;
    
                }
    
                p.Write(rgbValues, 0, length);
    
                bmp.UnlockBits(bmpData);
    
            }
    
            catch(Exception err)
    
            {
    
                Logger.Write("Error: " + err.ToString());
    
            }
    

    
        }
    

    
        public void Close()
    
        {
    
            p.Close();
    
        }
    
    }
    
}

    The Bitmaps images files on my hard disk each one is 1920x1080 and Bit depth 32.

    The video file is on the hard disk at size 1.24MB

    This is a screenshot i took from the video file when playing it.
    You can see how bad the quality is.

    screenshot from video bad quality

    This is a link for 10 images of the screenshots i’m using creating from the video file. They are Bitmaps.

    Screenshots rar

    Its something with the arguments :
    This line dosen’t work when i run the program the command prompt window close at once. I can’t even see if there is any erorr/s the command prompt window close too fast.

    psi.Arguments = @"-f libx264 -vcodec libx264 -pix_fmt bgra -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v mpeg4 -r " + BitmapRate + " " + outPath;

    When i’m using this arguments it’s working but making bad quality video :

    psi.Arguments = @"-f rawvideo -pix_fmt bgra -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v mpeg4 -r " + BitmapRate + " " + outPath;

  • Why i'm getting strange video file when using ffmpeg and pipes to create video file in real time ?

    30 juin 2015, par Brubaker Haim

    The goal here is to create a compressed mp4 video file in real time.
    I’m saving screenshots as bitmaps type on my hard disk.
    And i want to create mp4 file and compress the mp4 video file in real time.

    The problem is the end the video file i get looks very strange.
    This is the result : Strange Video File

    The class that i’m using the ffmpeg with arguments.

    using System;
    
using System.Windows.Forms;
    
using System.Collections.Generic;
    
using System.Linq;
    
using System.Text;
    
using System.Threading.Tasks;
    
using System.Drawing;
    
using System.IO.Pipes;
    
using System.Runtime.InteropServices;
    
using System.Diagnostics;
    
using System.IO;
    
using DannyGeneral;
    

    
namespace Youtube_Manager
    
{
    
    class Ffmpeg
    
    {
    
        NamedPipeServerStream p;
    
        String pipename = "mytestpipe";
    
        System.Diagnostics.Process process;
    
        string ffmpegFileName = "ffmpeg.exe";
    
        string workingDirectory;
    

    
        public Ffmpeg()
    
        {
    
            workingDirectory = Path.GetDirectoryName(Application.ExecutablePath);
    
            Logger.Write("workingDirectory: " + workingDirectory);
    
            if (!Directory.Exists(workingDirectory))
    
            {
    
                Directory.CreateDirectory(workingDirectory);
    
            }
    
            ffmpegFileName = Path.Combine(workingDirectory, ffmpegFileName);
    
            Logger.Write("FfmpegFilename: " + ffmpegFileName);
    
        }
    

    
        public void Start(string pathFileName, int BitmapRate)
    
        {
    
            try
    
            {
    

    
                string outPath = pathFileName;
    
                p = new NamedPipeServerStream(pipename, PipeDirection.Out, 1, PipeTransmissionMode.Byte);
    

    
                ProcessStartInfo psi = new ProcessStartInfo();
    
                psi.WindowStyle = ProcessWindowStyle.Hidden;
    
                psi.UseShellExecute = false;
    
                psi.CreateNoWindow = false;
    
                psi.FileName = ffmpegFileName;
    
                psi.WorkingDirectory = workingDirectory;
    
                psi.Arguments = @"-f rawvideo -pix_fmt yuv420p -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v mpeg4 -r " + BitmapRate + " " + outPath;
    
                //psi.Arguments = @"-framerate 1/5 -i -c:v libx264 -r 30 -pix_fmt yuv420p \\.\pipe\mytestpipe -map 0 -c:v mpeg4 -r" + BitmapRate + " " + outPath;
    
                process = Process.Start(psi);
    
                process.EnableRaisingEvents = false;
    
                psi.RedirectStandardError = true;
    
                p.WaitForConnection();
    
            }
    
            catch (Exception err)
    
            {
    
                Logger.Write("Exception Error: " + err.ToString());
    
            }
    
        }
    

    
        public void PushFrame(Bitmap bmp)
    
        {
    
            try
    
            {
    
                int length;
    
                // Lock the bitmap's bits.
    
                //bmp = new Bitmap(1920, 1080);
    
                Rectangle rect = new Rectangle(0, 0, bmp.Width, bmp.Height);
    
                //Rectangle rect = new Rectangle(0, 0, 1280, 720);
    
                System.Drawing.Imaging.BitmapData bmpData =
    
                    bmp.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadOnly,
    
                    bmp.PixelFormat);
    

    
                int absStride = Math.Abs(bmpData.Stride);
    
                // Get the address of the first line.
    
                IntPtr ptr = bmpData.Scan0;
    

    
                // Declare an array to hold the bytes of the bitmap.
    
                //length = 3 * bmp.Width * bmp.Height;
    
                length = absStride * bmpData.Height;
    
                byte[] rgbValues = new byte[length];
    

    
                //Marshal.Copy(ptr, rgbValues, 0, length);
    
                int j = bmp.Height - 1;
    
                for (int i = 0; i < bmp.Height; i++)
    
                {
    
                    IntPtr pointer = new IntPtr(bmpData.Scan0.ToInt32() + (bmpData.Stride * j));
    
                    System.Runtime.InteropServices.Marshal.Copy(pointer, rgbValues, absStride * (bmp.Height - i - 1), absStride);
    
                    j--;
    
                }
    
                p.Write(rgbValues, 0, length);
    
                bmp.UnlockBits(bmpData);
    
            }
    
            catch(Exception err)
    
            {
    
                Logger.Write("Error: " + err.ToString());
    
            }
    

    
        }
    

    
        public void Close()
    
        {
    
            p.Close();
    
        }
    
    }
    
}

    Then i’m using the method PushFrame here in this class :

    public Bitmap GetScreenShot(string folder, string name)
    
    {
    
        _screenShot = new Bitmap(GetScreen());
    
        System.GC.Collect();
    
        System.GC.WaitForPendingFinalizers();
    
        string ingName = folder + name +  images.counter.ToString("D6") + ".bmp";
    
        _screenShot.Save(ingName,System.Drawing.Imaging.ImageFormat.Bmp);
    
        fmpeg.PushFrame(_screenShot);
    
        _screenShot.Dispose();
    

    
        return _screenShot;
    
    }

    The Bitmaps on the hard disk are fine i can edit/open see them.
    When using command prompt and manually type ffmpeg command it does compress and create a mp4 video file.

    But when using the Ffmpeg class i did with the PushFrame method it’s creating this strange video file.

    This is a link for my OneDrive with 10 screenshots images files for testing :

    screenshots rar

    Sample screenshot from the video file when playing the video file :
    Looks very choppy. The Bitmaps on the hard disk each one is 1920x1080 and Bit depth 32

    But it dosen’t look like that in the video file :

    choppy image

    This is the arguments i’m using :

    psi.Arguments = @"-f rawvideo -vcodec rawvideo -pix_fmt rgb24 -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v mpeg4 -r " + BitmapRate + " " + outPath;

    The video size is very small 1.24 MB

  • How can I compress and create mp4 video file from batch of images on hard disk using ffmpeg ?

    29 juin 2015, par Brubaker Haim

    In my directory I copied ffmpeg.exe to the same directory where all the images are.
    All images are bitmaps.

    Then in the command prompt windows I typed :

    ffmpeg -f rawvideo -pix_fmt yuv420p -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v mpeg4 -r  out.mp4

    But I get error that there is no a directory name :

    \.\pipe\mytestpipe

    So I removed it and typed the same line without the pipe part.

    ffmpeg -f rawvideo -pix_fmt yuv420p -video_size 1920x1080 -i -map 0 -c:v mpeg4 -r  out.mp4

    Now there is no a directory name -map

    So I moved the -map 0

    ffmpeg -f rawvideo -pix_fmt yuv420p -video_size 1920x1080 -i -c:v mpeg4 -r  out.mp4

    Now I’m getting error :

    -c:v : Protocol not found

    I used this line with the pipe in my c# program as arguments to ffmpeg using ProcessStartInfo but now I don’t want to use pipes only in the command prompt to type it and compress and create mp4 video file.

    Edit I tried this now :

    ffmpeg -framerate 1/5 -i screenshot%06d.bmp -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4

    And what I get is some errors :

    E:\screenshots>ffmpeg -framerate 1/5 -i screenshot%06d.bmp -c:v libx264 -r 30 -p
    
ix_fmt yuv420p out.mp4
    
ffmpeg version N-73165-gf1e1730 Copyright (c) 2000-2015 the FFmpeg developers
    
  built with gcc 4.9.2 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
    
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
    
le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
    
enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l
    
ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
    
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
    
able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena
    
ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
    
 --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
    
e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --ena
    
ble-decklink --enable-zlib
    
  libavutil      54. 27.100 / 54. 27.100
    
  libavcodec     56. 45.100 / 56. 45.100
    
  libavformat    56. 38.102 / 56. 38.102
    
  libavdevice    56.  4.100 / 56.  4.100
    
  libavfilter     5. 18.100 /  5. 18.100
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  2.100 /  1.  2.100
    
  libpostproc    53.  3.100 / 53.  3.100
    
[bmp @ 0000000002eb7f80] bad magic number
    
    Last message repeated 2 times
    
[image2 @ 0000000002eb64e0] decoding for stream 0 failed
    
[image2 @ 0000000002eb64e0] Could not find codec parameters for stream 0 (Video:
    
 bmp, none): unspecified size
    
Consider increasing the value for the 'analyzeduration' and 'probesize' options
    
screenshot%06d.bmp: could not find codec parameters
    
Input #0, image2, from 'screenshot%06d.bmp':
    
  Duration: 00:07:35.00, start: 0.000000, bitrate: N/A
    
    Stream #0:0: Video: bmp, none, 0.20 fps, 0.20 tbr, 0.20 tbn, 0.20 tbc
    
Output #0, mp4, to 'out.mp4':
    
Output file #0 does not contain any stream

    For those who can see. When i’m doing it on a single file for example : ffmpeg -framerate 1/5 -i screenshot000002.bmp -c:v libx264 -r 30 -pix_fmt yuv420p out1.mp4 or screenshot000003.bmp or screenshot000122.bmp it will work fine and create the video file. But when i’m doing this for all images i’m getting all the errors : ffmpeg -framerate 1/5 -i screenshot%06d.bmp -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4 here is the results when i did on screenshot000002.bmp and it worked fine.

    When i’m doing it on a single image file it’s working fine like screenshot000002.bmp but when doing it on all the images screenshot%06d.bmp it’s giving me all the errors i mentioned above.

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