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• avformat/aviobuf : Add ffio_init_(read|write)_context()

  2 septembre 2023, par Andreas Rheinhardt

  avformat/aviobuf : Add ffio_init_(read|write)_context()
  Most users of ffio_init_context() simply want to wrap
  
  a buffer into an AVIOContext ; they do not provide
  
  function pointers at all.
  Therefore this commit adds shortcuts for these two common
  
  operations. This also allows to accept const data when reading
  
  (i.e. the const is now cast away at a central place in
  
  ffio_init_read_context() instead of at several callers).
  
  This also allows to constify the data in ff_text_init_buf().
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavformat/aacdec.c
  • [DH] libavformat/asfenc.c
  • [DH] libavformat/av1.c
  • [DH] libavformat/av1dec.c
  • [DH] libavformat/avio_internal.h
  • [DH] libavformat/aviobuf.c
  • [DH] libavformat/hls.c
  • [DH] libavformat/id3v2.c
  • [DH] libavformat/matroskadec.c
  • [DH] libavformat/mmst.c
  • [DH] libavformat/mov.c
  • [DH] libavformat/mpegts.c
  • [DH] libavformat/mpjpegdec.c
  • [DH] libavformat/oggenc.c
  • [DH] libavformat/rdt.c
  • [DH] libavformat/rtpdec_asf.c
  • [DH] libavformat/rtpdec_qt.c
  • [DH] libavformat/rtsp.c
  • [DH] libavformat/sapdec.c
  • [DH] libavformat/subtitles.c
  • [DH] libavformat/subtitles.h
  • [DH] libavformat/vividas.c

• compiling ffmpeg with decklink fails on debian

  16 avril 2019, par derhottevomdorf

  Following FFmpeg Wiki : Ubuntu. All dependencies, gcc, nasm, etc. should be up to date. I compiled ffmpeg successfully without Decklink library.

  Now adding --enable-decklink and the required includes from Decklink SDK I get the errors below.

  Any ideas ?

  CXX     libavdevice/decklink_common.o
  
  cc1plus: warning: command line option ‘-Wdeclaration-after-statement’ is valid for C/ObjC but not for C++
  
  cc1plus: warning: command line option ‘-Wmissing-prototypes’ is valid for C/ObjC but not for C++
  
  cc1plus: warning: command line option ‘-Wno-pointer-to-int-cast’ is valid for C/ObjC but not for C++
  
  cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++
  
  cc1plus: warning: command line option ‘-Wno-pointer-sign’ is valid for C/ObjC but not for C++
  
  cc1plus: warning: command line option ‘-std=c11’ is valid for C/ObjC but not for C++
  
  In file included from libavdevice/decklink_common.cpp:54:0:
  
  libavdevice/decklink_common.h:90:5: error: ‘IDeckLinkAttributes’ does not name a type
  
       IDeckLinkAttributes *attr;
  
       ^~~~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp: In function ‘int decklink_get_attr_string(IDeckLink*, BMDDeckLinkAttributeID, const char**)’:
  
  libavdevice/decklink_common.cpp:84:5: error: ‘IDeckLinkAttributes’ was not declared in this scope
  
       IDeckLinkAttributes *attr;
  
       ^~~~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp:84:26: error: ‘attr’ was not declared in this scope
  
       IDeckLinkAttributes *attr;
  
                            ^~~~
  
  libavdevice/decklink_common.cpp:86:28: error: ‘IID_IDeckLinkAttributes’ was not declared in this scope
  
       if (dl->QueryInterface(IID_IDeckLinkAttributes, (void **)&attr) != S_OK)
  
                              ^~~~~~~~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp: In function ‘int decklink_select_input(AVFormatContext*, BMDDeckLinkConfigurationID)’:
  
  libavdevice/decklink_common.cpp:112:20: error: ‘struct decklink_ctx’ has no member named ‘attr’
  
           res = ctx->attr->GetInt(attr_id, &supported_connections);
  
                      ^~~~
  
  libavdevice/decklink_common.cpp: In function ‘int ff_decklink_set_configs(AVFormatContext*, decklink_direction_t)’:
  
  libavdevice/decklink_common.cpp:152:18: error: ‘struct decklink_ctx’ has no member named ‘attr’
  
           if (ctx->attr->GetFlag(BMDDeckLinkSupportsDuplexModeConfiguration, &duplex_supported) != S_OK)
  
                    ^~~~
  
  libavdevice/decklink_common.cpp:152:32: error: ‘BMDDeckLinkSupportsDuplexModeConfiguration’ was not declared in this scope
  
           if (ctx->attr->GetFlag(BMDDeckLinkSupportsDuplexModeConfiguration, &duplex_supported) != S_OK)
  
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp:156:36: error: ‘bmdDeckLinkConfigDuplexMode’ was not declared in this scope
  
               res = ctx->cfg->SetInt(bmdDeckLinkConfigDuplexMode, ctx->duplex_mode == 2 ? bmdDuplexModeFull : bmdDuplexModeHalf);
  
                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp:156:89: error: ‘bmdDuplexModeFull’ was not declared in this scope
  
               res = ctx->cfg->SetInt(bmdDeckLinkConfigDuplexMode, ctx->duplex_mode == 2 ? bmdDuplexModeFull : bmdDuplexModeHalf);
  
                                                                                           ^~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp:156:109: error: ‘bmdDuplexModeHalf’ was not declared in this scope
  
               res = ctx->cfg->SetInt(bmdDeckLinkConfigDuplexMode, ctx->duplex_mode == 2 ? bmdDuplexModeFull : bmdDuplexModeHalf);
  
                                                                                                               ^~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp: In function ‘int ff_decklink_set_format(AVFormatContext*, int, int, int, int, AVFieldOrder, decklink_direction_t, int)’:
  
  libavdevice/decklink_common.cpp:190:5: error: ‘BMDDisplayModeSupport’ was not declared in this scope
  
       BMDDisplayModeSupport support;
  
       ^~~~~~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp:254:45: error: ‘support’ was not declared in this scope
  
                                              &support, NULL) != S_OK)
  
                                               ^~~~~~~
  
  libavdevice/decklink_common.cpp:259:68: error: ‘support’ was not declared in this scope
  
                                                                     &support, NULL) != S_OK) {
  
                                                                      ^~~~~~~
  
  libavdevice/decklink_common.cpp:270:9: error: ‘support’ was not declared in this scope
  
       if (support == bmdDisplayModeSupported)
  
           ^~~~~~~
  
  libavdevice/decklink_common.cpp:270:20: error: ‘bmdDisplayModeSupported’ was not declared in this scope
  
       if (support == bmdDisplayModeSupported)
  
                      ^~~~~~~~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp: In function ‘void ff_decklink_cleanup(AVFormatContext*)’:
  
  libavdevice/decklink_common.cpp:434:14: error: ‘struct decklink_ctx’ has no member named ‘attr’
  
       if (ctx->attr)
  
                ^~~~
  
  libavdevice/decklink_common.cpp:435:14: error: ‘struct decklink_ctx’ has no member named ‘attr’
  
           ctx->attr->Release();
  
                ^~~~
  
  libavdevice/decklink_common.cpp: In function ‘int ff_decklink_init_device(AVFormatContext*, const char*)’:
  
  libavdevice/decklink_common.cpp:476:33: error: ‘IID_IDeckLinkAttributes’ was not declared in this scope
  
       if (ctx->dl->QueryInterface(IID_IDeckLinkAttributes, (void **)&ctx->attr) != S_OK) {
  
                                   ^~~~~~~~~~~~~~~~~~~~~~~
  
  libavdevice/decklink_common.cpp:476:73: error: ‘struct decklink_ctx’ has no member named ‘attr’
  
       if (ctx->dl->QueryInterface(IID_IDeckLinkAttributes, (void **)&ctx->attr) != S_OK) {
  
                                                                           ^~~~
  
  ffbuild/common.mak:63: recipe for target 'libavdevice/decklink_common.o' failed
  
  make: *** [libavdevice/decklink_common.o] Error 1

• Using ffmpeg.exe making the computer slow in task manager it takes over 1GB of memory how can i fix it ?

  29 mai 2013, par Revuen Ben Dror

  In mt Form1 i have this code :

  private void StartRecording_Click(object sender, EventArgs e)
  
          {
  
  
  
              ffmp.Start("test.avi", 25);
  
              timer1.Enabled = true;
  
          }

  ffmp is a variable of my class : Ffmpeg
  In this class i add frames to a pipe and create an avi file.

  using System;
  
  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;
  
  
  
  namespace ScreenVideoRecorder
  
  {
  
      class Ffmpeg
  
      {
  
          NamedPipeServerStream p;
  
          String pipename = "mytestpipe";
  
          byte[] b;
  
          System.Diagnostics.Process process;
  
  
  
          public Ffmpeg()
  
          {
  
  
  
          }
  
  
  
          public void Start(string FileName, int BitmapRate)
  
          {
  
              p = new NamedPipeServerStream(pipename, PipeDirection.Out, 1, PipeTransmissionMode.Byte);
  
              b = new byte[1920 * 1080 * 3]; // some buffer for the r g and b of pixels of an image of size 720p 
  
              process = new System.Diagnostics.Process();
  
              process.StartInfo.FileName = @"D:\pipetest\pipetest\ffmpegx86\ffmpeg.exe";
  
              process.EnableRaisingEvents = false;
  
              process.StartInfo.WorkingDirectory = @"D:\pipetest\pipetest\ffmpegx86";
  
              process.StartInfo.Arguments = @"-f rawvideo -pix_fmt bgr0 -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v libx264 -r " + BitmapRate + " " + FileName;
  
              process.Start();
  
  
  
              process.StartInfo.UseShellExecute = false;
  
              process.StartInfo.CreateNoWindow = false;
  
  
  
              p.WaitForConnection();
  
          }
  
  
  
          public void PushFrame(Bitmap bmp)
  
          {
  
  
  
              int length;
  
              // Lock the bitmap's bits.
  
              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];
  
  
  
              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);
  
  
  
          public void Close()
  
          {
  
              p.Close();
  
          }
  
      }
  
  }

  The problem is when i'm running my application in this from my visual studio 2012 pro and click the button it's openning a console window and start the processing .

  I tracked over it through the task manager on ffmpeg.exe and saw that it started from 996mb and very quick jumped ot 1040mb memory usage. The cpu usage was only 16%

  Once i close ended this task the ffmpeg.exe everything was back to move smooth.
  When it's working and i tried to drag my Form around the screen for example it was moving slow and also with some stuttering .

  Closed the ffmpeg.exe and i could drag the Form around smooth and quick like in regular way as it should be.

  I tried to google for it and found some others with the same problem i think but i'm not sure where is the problem and how to fix it.

  I'm not sure what version of ffmpeg.exe i have i'm using now but i read in some places that it's not working better with new versions but maybe i mistake here .

  My windows is 8 with 6gb of ram .