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Stereo master soundtrack
17 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Audio
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Elephants Dream - Cover of the soundtrack
17 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Image
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#7 Ambience
16 octobre 2011, par
Mis à jour : Juin 2015
Langue : English
Type : Audio
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#6 Teaser Music
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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#5 End Title
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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#3 The Safest Place
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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Autres articles (36)
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Sur d’autres sites (6869)
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Video duration is the double of what it should be
12 juin 2019, par lulasI was trying to record my computer screen, for that I am using Accord.
I had everything working fine with the Accord version 3.8.0.0, but when I upgraded to the version 3.8.2.0-alpha my recording videos are slow down, and they take approximately the double to finish.
So a 10 second video actually takes 20 seconds to play (in the video player the duration of the video is also 10 seconds).
I searched in google and didn’t managed to find anything usefull. Probably due to the alpha version of the release.
I managed to find a project from one of the maintainers of the Accord project that uses this 3.8.2.0-alpha version : https://github.com/cesarsouza/screencast-capture
I downloaded the zip file, extracted the project, built the project, fixed a compilation error (change a
Dispose()toStop()) and then ran the application, but the problem still exists... the generated video files are still slow down...The main methods of my code with the 3.8.2.0-alpha version are these (they were taken from the previous project I downloaded) :
public void StartRecording()
{
if (IsRecording || !IsPlaying)
return;
int height = area.Height;
int width = area.Width;
Rational framerate = new Rational(1000, screenStream.FrameInterval);
int videoBitRate = 1200 * 1000;
OutputPath = Path.Combine(main.CurrentDirectory, fileName);
RecordingStartTime = DateTime.MinValue;
videoWriter = new VideoFileWriter();
videoWriter.BitRate = videoBitRate;
videoWriter.FrameRate = framerate;
videoWriter.Width = width;
videoWriter.Height = height;
videoWriter.VideoCodec = VideoCodec.H264;
videoWriter.VideoOptions["crf"] = "18";
videoWriter.VideoOptions["preset"] = "veryfast";
videoWriter.VideoOptions["tune"] = "zerolatency";
videoWriter.VideoOptions["x264opts"] = "no-mbtree:sliced-threads:sync-lookahead=0";
videoWriter.Open(OutputPath);
HasRecorded = false;
IsRecording = true;
}
void VideoPlayer_NewFrameReceived(object sender, Accord.Video.NewFrameEventArgs eventArgs)
{
DateTime currentFrameTime = eventArgs.CaptureFinished;
// Encode the last frame at the same time we prepare the new one
Task.WaitAll(
Task.Run(() =>
{
lock (syncObj) // Save the frame to the video file.
{
if (IsRecording)
{
if (RecordingStartTime == DateTime.MinValue)
RecordingStartTime = DateTime.Now;
TimeSpan timestamp = currentFrameTime - RecordingStartTime;
if (timestamp > TimeSpan.Zero)
videoWriter.WriteVideoFrame(this.lastFrame, timestamp, this.lastFrameRegion);
}
}
}),
Task.Run(() =>
{
// Adjust the window according to the current capture
// mode. Also adjusts to keep even widths and heights.
CaptureRegion = AdjustWindow();
// Crop the image if the mode requires it
if (CaptureMode == CaptureRegionOption.Fixed ||
CaptureMode == CaptureRegionOption.Window)
{
crop.Rectangle = CaptureRegion;
eventArgs.Frame = croppedImage = crop.Apply(eventArgs.Frame, croppedImage);
eventArgs.FrameSize = crop.Rectangle.Size;
}
//// Draw extra information on the screen
bool captureMouse = Settings.Default.CaptureMouse;
bool captureClick = Settings.Default.CaptureClick;
bool captureKeys = Settings.Default.CaptureKeys;
if (captureMouse || captureClick || captureKeys)
{
cursorCapture.CaptureRegion = CaptureRegion;
clickCapture.CaptureRegion = CaptureRegion;
keyCapture.Font = Settings.Default.KeyboardFont;
using (Graphics g = Graphics.FromImage(eventArgs.Frame))
{
g.CompositingQuality = CompositingQuality.HighSpeed;
g.SmoothingMode = SmoothingMode.HighSpeed;
float invWidth = 1; // / widthScale;
float invHeight = 1; // / heightScale;
if (captureMouse)
cursorCapture.Draw(g, invWidth, invHeight);
if (captureClick)
clickCapture.Draw(g, invWidth, invHeight);
if (captureKeys)
keyCapture.Draw(g, invWidth, invHeight);
}
}
})
);
// Save the just processed frame and mark it to be encoded in the next iteration:
lastFrame = eventArgs.Frame.Copy(lastFrame);
lastFrameRegion = new Rectangle(0, 0, eventArgs.FrameSize.Width, eventArgs.Frame.Height);
}Anyone knows what might be problem causing this slow down ?
EDIT :
I think I managed to find my problem :
pts:4.032000e+003 pts_time:0.252 dts:2.016000e+003 dts_time:0.126 duration:6.720000e+002 duration_time:0.042 stream_index:0
pts:6.720000e+003 pts_time:0.42 dts:3.360000e+003 dts_time:0.21 duration:6.720000e+002 duration_time:0.042 stream_index:0
pts:1.075200e+004 pts_time:0.672 dts:5.376000e+003 dts_time:0.336 duration:6.720000e+002 duration_time:0.042 stream_index:0
pts:1.344000e+004 pts_time:0.84 dts:6.720000e+003 dts_time:0.42 duration:6.720000e+002 duration_time:0.042 stream_index:0
pts:1.612800e+004 pts_time:1.008 dts:8.064000e+003 dts_time:0.504 duration:6.720000e+002 duration_time:0.042 stream_index:0
pts:1.881600e+004 pts_time:1.176 dts:9.408000e+003 dts_time:0.588 duration:6.720000e+002 duration_time:0.042 stream_index:0
pts:2.150400e+004 pts_time:1.344 dts:1.075200e+004 dts_time:0.672 duration:6.720000e+002 duration_time:0.042 stream_index:0
pts:2.553600e+004 pts_time:1.596 dts:1.276800e+004 dts_time:0.798 duration:6.720000e+002 duration_time:0.042 stream_index:0
pts:2.822400e+004 pts_time:1.764 dts:1.411200e+004 dts_time:0.882 duration:6.720000e+002 duration_time:0.042 stream_index:0
pts:3.091200e+004 pts_time:1.932 dts:1.545600e+004 dts_time:0.966 duration:6.720000e+002 duration_time:0.042 stream_index:0
pts:3.494400e+004 pts_time:2.184 dts:1.747200e+004 dts_time:1.092 duration:6.720000e+002 duration_time:0.042 stream_index:0
pts:3.897600e+004 pts_time:2.436 dts:1.948800e+004 dts_time:1.218 duration:6.720000e+002 duration_time:0.042 stream_index:0
pts:4.166400e+004 pts_time:2.604 dts:2.083200e+004 dts_time:1.302 duration:6.720000e+002 duration_time:0.042 stream_index:0
pts:4.704000e+004 pts_time:2.94 dts:2.352000e+004 dts_time:1.47 duration:6.720000e+002 duration_time:0.042 stream_index:0
pts:5.107200e+004 pts_time:3.192 dts:2.553600e+004 dts_time:1.596 duration:6.720000e+002 duration_time:0.042 stream_index:0The PTS is always the double of DTS, that’s why the video is presented in a slow down way.
Unfortunately I have no idea why this happens... Anyone has any clue ?
-
Not able to link ffmpeg library in cython package
12 août 2020, par Sagar DonadkarI am using cython package to call Cpp API and in my cpp code i am using ffmpeg library when i try to build my code i got and linking issue
In header file add include ffmpeg header file to call ffmpeg library function


header file
#ifndef RECTANGLE_H
#define RECTANGLE_H
#include <iostream>

extern "C"
{
 #include "libavformat/avformat.h"
 #include "libavutil/dict.h"
}

using namespace std;

namespace shapes 
{
 class Rectangle {
 public:
 int x0, y0, x1, y1;
 Rectangle();
 Rectangle(int x0, int y0, int x1, int y1);
 ~Rectangle();
 int getArea();
 int ffmpegFile();
 void getSize(int* width, int* height);
 void move(int dx, int dy);
 };
}

#endif
</iostream>

Rectangle.Cpp file in ffmpegFile() i am using ffmpeg example code to test ffmpeg my code where i call mostly ffmpeg API



#include <iostream>
#include "Rectangle.hpp"

namespace shapes {
 

 // Default constructor
 Rectangle::Rectangle () {}

 // Overloaded constructor
 Rectangle::Rectangle (int x0, int y0, int x1, int y1) {
 this->x0 = x0;
 this->y0 = y0;
 this->x1 = x1;
 this->y1 = y1;
 }

 // Destructor
 Rectangle::~Rectangle () {}

 // Return the area of the rectangle
 int Rectangle::getArea () {
 return 10;
 }

 // Get the size of the rectangle.
 // Put the size in the pointer args
 void Rectangle::getSize (int *width, int *height) {
 (*width) = x1 - x0;
 (*height) = y1 - y0;
 }

 // Move the rectangle by dx dy
 void Rectangle::move (int dx, int dy) {
 this->x0 += dx;
 this->y0 += dy;
 this->x1 += dx;
 this->y1 += dy;
 }
 int Rectangle::ffmpegFile()
 {
 AVFormatContext *fmt_ctx = NULL;
 AVDictionaryEntry *tag = NULL;
 int ret = 0;
 char* filename = "D:\\Discovery.mp4";

 if ((ret = avformat_open_input(&fmt_ctx, filename, NULL, NULL)))
 return ret;

 if ((ret = avformat_find_stream_info(fmt_ctx, NULL)) < 0) {
 av_log(NULL, AV_LOG_ERROR, "Cannot find stream information\n");
 return ret;
 }

 while ((tag = av_dict_get(fmt_ctx->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
 printf("%s=%s\n", tag->key, tag->value);

 avformat_close_input(&fmt_ctx);
 return ret;
 }
}
</iostream>

Rectangle.pxd file declaration for cpp file function and variable


cdef extern from "Rectangle.cpp":
 pass
cdef extern from "Rectangle.hpp" namespace "shapes":
 cdef cppclass Rectangle:
 Rectangle() except +
 Rectangle(int, int, int, int) except +
 int x0, y0, x1, y1
 int getArea()
 void getSize(int* width, int* height)
 void move(int, int)
 int ffmpegFile()


rect.pyx file i am calling cpp API form pyx file


# distutils: language = c++

from Rectangle cimport Rectangle

cdef class PyRectangle:
 cdef Rectangle c_rect # Hold a C++ instance which we're wrapping

 def __cinit__(self, int x0, int y0, int x1, int y1):
 self.c_rect = Rectangle(x0, y0, x1, y1)

 def get_area(self):
 return self.c_rect.getArea()

 def get_size(self):
 cdef int width, height
 self.c_rect.getSize(&width, &height)
 return width, height

 def move(self):
 print(self.c_rect.ffmpegFile())


setup.py
I provided pyx file and ffmpeg library path as well as include path


from setuptools import setup,Extension
from Cython.Build import cythonize 


directives={'linetrace':False, 'language_level':3}

setup(name = 'superfastcode', version = '1.0',
 description = 'Python Package with superfastcode C++ extension',
 ext_modules=cythonize([
 Extension(
 'demo',["rect.pyx"],
 include_dirs=['ffmpeg\\include'],)
 library_dirs=["ffmpeg\\lib"],
 libraries=["avcodec","avformat","avutil","swscale","avdevice","avfilter","postproc","swresample"]),
 
]))


getting below error


PS D:\SiVUE\Backend\Cython\demo> python setup.py build_ext --inplace
Compiling rect.pyx because it depends on .\Rectangle.pxd.
[1/1] Cythonizing rect.pyx
C:\python3.8\lib\site-packages\Cython\Compiler\Main.py:369: FutureWarning: Cython directive 'language_level' not set, using 2 for now (Py2). This will change in a later release! File: D:\SiVUE\Backend\Cython\demo\rect.pyx
 tree = Parsing.p_module(s, pxd, full_module_name)
running build_ext
building 'demo' extension
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\bin\HostX86\x86\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -I. -Iffmpeg\include -IC:\python3.8\include -IC:\python3.8\include "-IC:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\include" "-IC:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\include\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\shared" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\winrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\cppwinrt" /EHsc /Tprect.cpp /Fobuild\temp.win32-3.8\Release\rect.obj
rect.cpp
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\bin\HostX86\x86\link.exe /nologo /INCREMENTAL:NO /LTCG /DLL /MANIFEST:EMBED,ID=2 /MANIFESTUAC:NO /LIBPATH:ffmpeg\lib /LIBPATH:C:\python3.8\libs /LIBPATH:C:\python3.8\PCbuild\win32 "/LIBPATH:C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\lib\x86" "/LIBPATH:C:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\lib\um\x86" "/LIBPATH:C:\Program Files (x86)\Windows Kits\10\lib\10.0.18362.0\ucrt\x86" "/LIBPATH:C:\Program Files (x86)\Windows Kits\10\lib\10.0.18362.0\um\x86" avcodec.lib avformat.lib avutil.lib swscale.lib avdevice.lib avfilter.lib postproc.lib swresample.lib /EXPORT:PyInit_demo build\temp.win32-3.8\Release\rect.obj /OUT:build\lib.win32-3.8\demo.cp38-win32.pyd /IMPLIB:build\temp.win32-3.8\Release\demo.cp38-win32.lib
 Creating library build\temp.win32-3.8\Release\demo.cp38-win32.lib and object build\temp.win32-3.8\Release\demo.cp38-win32.exp
rect.obj : error LNK2001: unresolved external symbol _avformat_open_input
rect.obj : error LNK2001: unresolved external symbol _av_log
rect.obj : error LNK2001: unresolved external symbol _avformat_close_input
rect.obj : error LNK2001: unresolved external symbol _avformat_find_stream_info
rect.obj : error LNK2001: unresolved external symbol _av_dict_get
build\lib.win32-3.8\demo.cp38-win32.pyd : fatal error LNK1120: 5 unresolved externals
error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Community\\VC\\Tools\\MSVC\\14.26.28801\\bin\\HostX86\\x86\\link.exe' failed with exit status 1120


Thank You


-
Getting error "DLL load failed while importing rect : %1 is not a valid Win32 application" while importing package
17 août 2020, par Sagar DonadkarI am using cython package to call Cpp API and in my cpp code i am using ffmpeg library and able to build my code successfully using bellow command


python setup.py build_ext --inplace --compiler=msvc


but when i try to import generated pyd file then i get error


PS D:\SiVUE\Backend\Cython\demo> python
Python 3.8.3 (tags/v3.8.3:6f8c832, May 13 2020, 22:20:19) [MSC v.1925 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import rect
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
ImportError: DLL load failed while importing rect: %1 is not a valid Win32 application.
>>> 
</module></stdin>

My entire code is provided bellow


header file
#ifndef RECTANGLE_H
#define RECTANGLE_H
#include <iostream>

extern "C"
{
 #include "libavformat/avformat.h"
 #include "libavutil/dict.h"
}

using namespace std;

namespace shapes 
{
 class Rectangle {
 public:
 int x0, y0, x1, y1;
 Rectangle();
 Rectangle(int x0, int y0, int x1, int y1);
 ~Rectangle();
 int getArea();
 int ffmpegFile();
 void getSize(int* width, int* height);
 void move(int dx, int dy);
 };
}

#endif
</iostream>

Rectangle.Cpp file in ffmpegFile() i am calling mostly ffmpeg API



#include <iostream>
#include "Rectangle.hpp"

namespace shapes {
 

 // Default constructor
 Rectangle::Rectangle () {}

 // Overloaded constructor
 Rectangle::Rectangle (int x0, int y0, int x1, int y1) {
 this->x0 = x0;
 this->y0 = y0;
 this->x1 = x1;
 this->y1 = y1;
 }

 // Destructor
 Rectangle::~Rectangle () {}

 // Return the area of the rectangle
 int Rectangle::getArea () {
 return 10;
 }

 // Get the size of the rectangle.
 // Put the size in the pointer args
 void Rectangle::getSize (int *width, int *height) {
 (*width) = x1 - x0;
 (*height) = y1 - y0;
 }

 // Move the rectangle by dx dy
 void Rectangle::move (int dx, int dy) {
 this->x0 += dx;
 this->y0 += dy;
 this->x1 += dx;
 this->y1 += dy;
 }
 int Rectangle::ffmpegFile()
 {
 AVFormatContext *fmt_ctx = NULL;
 AVDictionaryEntry *tag = NULL;
 int ret = 0;
 char* filename = "D:\\Discovery.mp4";

 if ((ret = avformat_open_input(&fmt_ctx, filename, NULL, NULL)))
 return ret;

 if ((ret = avformat_find_stream_info(fmt_ctx, NULL)) < 0) {
 av_log(NULL, AV_LOG_ERROR, "Cannot find stream information\n");
 return ret;
 }

 while ((tag = av_dict_get(fmt_ctx->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
 printf("%s=%s\n", tag->key, tag->value);

 avformat_close_input(&fmt_ctx);
 return ret;
 }
}
</iostream>

Rectangle.pxd file declaration for cpp file function and variable


cdef extern from "Rectangle.cpp":
 pass
cdef extern from "Rectangle.hpp" namespace "shapes":
 cdef cppclass Rectangle:
 Rectangle() except +
 Rectangle(int, int, int, int) except +
 int x0, y0, x1, y1
 int getArea()
 void getSize(int* width, int* height)
 void move(int, int)
 int ffmpegFile()


rect.pyx file i am calling cpp API


# distutils: language = c++

from Rectangle cimport Rectangle

cdef class PyRectangle:
 cdef Rectangle c_rect # Hold a C++ instance which we're wrapping

 def __cinit__(self, int x0, int y0, int x1, int y1):
 self.c_rect = Rectangle(x0, y0, x1, y1)

 def get_area(self):
 return self.c_rect.getArea()

 def get_size(self):
 cdef int width, height
 self.c_rect.getSize(&width, &height)
 return width, height

 def move(self):
 print(self.c_rect.ffmpegFile())


setup.py
I provided pyx file and ffmpeg library path as well as include path


from distutils.core import setup
from setuptools import Extension
from Cython.Build import cythonize 

sfc_module = [Extension('rect', sources = ['rect.pyx'],
 include_dirs = ['D:\\SiVUE\\Backend\\Cython\\demo\\ffmpeg\\include\\'],
 library_dirs = ['D:\\SiVUE\\Backend\\Cython\\demo\\ffmpeg\\lib\\'],
 libraries = ['avcodec','avdevice','avfilter','avformat','avutil','postproc','swresample','swscale'],
 language='c++')]

setup(name = 'superfastcode', version = '1.0',
 description = 'Python Package with superfastcode C++ extension',
 ext_modules = cythonize(sfc_module),
 include_dirs = ['D:\\SiVUE\\Backend\\Cython\\demo\\ffmpeg\\include\\']
 )


Thank You


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