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  • MediaSPIP v0.2

    21 juin 2013, par

    MediaSPIP 0.2 est la première version de MediaSPIP stable.
    Sa date de sortie officielle est le 21 juin 2013 et est annoncée ici.
    Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
    Comme pour la version précédente, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
    Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...)

  • MediaSPIP version 0.1 Beta

    16 avril 2011, par

    MediaSPIP 0.1 beta est la première version de MediaSPIP décrétée comme "utilisable".
    Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
    Pour avoir une installation fonctionnelle, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
    Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...)

  • Gestion générale des documents

    13 mai 2011, par

    MédiaSPIP ne modifie jamais le document original mis en ligne.
    Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
    Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...)

Sur d’autres sites (13911)

  • How to show an video while converting from one format to another format using ffmpeg in php.?

    15 avril 2014, par mani

    Presently i am writing a one application in php.
    which can be able to convert one format to another format using ffmpeg.

    Example : AVI to MP4

    Here my client wants

    "while converting he want's to see the ongoing converting video file
    like shown in standard video converting softwares"

    Is it possilble in PHP or is there any options available in ffmpeg

  • Fragment shader does not show any colour when compiled with vs2013

    11 juin 2015, par 5mayfive

    When compiled with vs2010, the fragment shader works, but when I compiled and run in vs 2013, it’s grey.

    My fragment shader converts the yuv texture into rgb

    Below is my fragment code

        const char *FProgram =
    
    "uniform sampler2D Ytex;\n"
    
    "uniform sampler2D Utex;\n"
    
    "uniform sampler2D Vtex;\n"
    
    "void main(void) {\n"
    
    "  vec4 c = vec4((texture2D(Ytex, gl_TexCoord[0]).r - 16./255.) * 1.164);\n"
    
    "  vec4 U = vec4(texture2D(Utex, gl_TexCoord[0]).r - 128./255.);\n"
    
    "  vec4 V = vec4(texture2D(Vtex, gl_TexCoord[0]).r - 128./255.);\n"
    
    "  c += V * vec4(1.596, -0.813, 0, 0);\n"
    
    "  c += U * vec4(0, -0.392, 2.017, 0);\n"
    
    "  c.a = 1.0;\n"
    
    "  gl_FragColor = c;\n"
    
    "}\n";
    

    

    

    

    

    
glClearColor(0, 0, 0, 0);
    

    
PHandle = glCreateProgram();
    
FSHandle = glCreateShader(GL_FRAGMENT_SHADER);
    

    

    

    
glShaderSource(FSHandle, 1, &FProgram, NULL);
    
glCompileShader(FSHandle);
    

    
glAttachShader(PHandle, FSHandle);
    
glLinkProgram(PHandle);
    

    

    
glUseProgram(PHandle);
    
glDeleteProgram(PHandle);
    
glDeleteProgram(FSHandle);

    This is my texture code, I receive linesize and yuv frame data from ffmpeg and make into texture. Everything works fine in VS 2010 computer, but when compiled and run in vs2013 computer, it is grey (black n white), no colour

        /* Select texture unit 1 as the active unit and bind the U texture. */
    
glPixelStorei(GL_UNPACK_ROW_LENGTH, linesize1);
    
glActiveTexture(GL_TEXTURE1);
    
i = glGetUniformLocation(PHandle, "Utex");
    
glUniform1i(i, 1);  /* Bind Utex to texture unit 1 */
    
glBindTexture(GL_TEXTURE_2D, 1);
    
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, width / 2, height / 2, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, frame1);
    
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
    

    

    
/* Select texture unit 2 as the active unit and bind the V texture. */
    
glPixelStorei(GL_UNPACK_ROW_LENGTH, linesize2);
    
glActiveTexture(GL_TEXTURE2);
    
i = glGetUniformLocation(PHandle, "Vtex");
    
glUniform1i(i, 2);  /* Bind Vtext to texture unit 2 */
    
glBindTexture(GL_TEXTURE_2D, 2);
    
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, width / 2, height / 2, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, frame2);
    
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
    

    

    
/* Select texture unit 0 as the active unit and bind the Y texture. */
    

    

    

    
glPixelStorei(GL_UNPACK_ROW_LENGTH, linesize0);
    
glActiveTexture(GL_TEXTURE0);
    
i = glGetUniformLocation(PHandle, "Ytex");
    
glUniform1i(i, 0);
    
glBindTexture(GL_TEXTURE_2D, 0);
    
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, width, height, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, frame0);
    
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
    

    

    

    
glClear(GL_COLOR_BUFFER_BIT);
    

    
/* Draw image (again and again). */
    

    
glBegin(GL_QUADS);
    
glTexCoord2i(0, 0);
    
glVertex2i(-w / 2, h / 2);
    
glTexCoord2i(1, 0);
    
glVertex2i(w / 2, h / 2);
    
glTexCoord2i(1, 1);
    
glVertex2i(w / 2, -h / 2);
    
glTexCoord2i(0, 1);
    
glVertex2i(-w / 2, -h / 2);
    
glEnd();

    Need guidance here, thanks in advance !

  • Fragment shader does not show any colour when compiled with vs2013

    4 septembre 2019, par 5mayfive

    When compiled with vs2010, the fragment shader works, but when I compiled and run in vs 2013, it’s grey.

    My fragment shader converts the yuv texture into rgb

    Below is my fragment code

        const char *FProgram =
    
    "uniform sampler2D Ytex;\n"
    
    "uniform sampler2D Utex;\n"
    
    "uniform sampler2D Vtex;\n"
    
    "void main(void) {\n"
    
    "  vec4 c = vec4((texture2D(Ytex, gl_TexCoord[0]).r - 16./255.) * 1.164);\n"
    
    "  vec4 U = vec4(texture2D(Utex, gl_TexCoord[0]).r - 128./255.);\n"
    
    "  vec4 V = vec4(texture2D(Vtex, gl_TexCoord[0]).r - 128./255.);\n"
    
    "  c += V * vec4(1.596, -0.813, 0, 0);\n"
    
    "  c += U * vec4(0, -0.392, 2.017, 0);\n"
    
    "  c.a = 1.0;\n"
    
    "  gl_FragColor = c;\n"
    
    "}\n";
    

    

    

    

    

    
glClearColor(0, 0, 0, 0);
    

    
PHandle = glCreateProgram();
    
FSHandle = glCreateShader(GL_FRAGMENT_SHADER);
    

    

    

    
glShaderSource(FSHandle, 1, &FProgram, NULL);
    
glCompileShader(FSHandle);
    

    
glAttachShader(PHandle, FSHandle);
    
glLinkProgram(PHandle);
    

    

    
glUseProgram(PHandle);
    
glDeleteProgram(PHandle);
    
glDeleteProgram(FSHandle);

    This is my texture code, I receive linesize and yuv frame data from ffmpeg and make into texture. Everything works fine in VS 2010 computer, but when compiled and run in vs2013 computer, it is grey (black n white), no colour

        /* Select texture unit 1 as the active unit and bind the U texture. */
    
glPixelStorei(GL_UNPACK_ROW_LENGTH, linesize1);
    
glActiveTexture(GL_TEXTURE1);
    
i = glGetUniformLocation(PHandle, "Utex");
    
glUniform1i(i, 1);  /* Bind Utex to texture unit 1 */
    
glBindTexture(GL_TEXTURE_2D, 1);
    
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, width / 2, height / 2, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, frame1);
    
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
    

    

    
/* Select texture unit 2 as the active unit and bind the V texture. */
    
glPixelStorei(GL_UNPACK_ROW_LENGTH, linesize2);
    
glActiveTexture(GL_TEXTURE2);
    
i = glGetUniformLocation(PHandle, "Vtex");
    
glUniform1i(i, 2);  /* Bind Vtext to texture unit 2 */
    
glBindTexture(GL_TEXTURE_2D, 2);
    
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, width / 2, height / 2, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, frame2);
    
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
    

    

    
/* Select texture unit 0 as the active unit and bind the Y texture. */
    

    

    

    
glPixelStorei(GL_UNPACK_ROW_LENGTH, linesize0);
    
glActiveTexture(GL_TEXTURE0);
    
i = glGetUniformLocation(PHandle, "Ytex");
    
glUniform1i(i, 0);
    
glBindTexture(GL_TEXTURE_2D, 0);
    
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, width, height, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, frame0);
    
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
    

    

    

    
glClear(GL_COLOR_BUFFER_BIT);
    

    
/* Draw image (again and again). */
    

    
glBegin(GL_QUADS);
    
glTexCoord2i(0, 0);
    
glVertex2i(-w / 2, h / 2);
    
glTexCoord2i(1, 0);
    
glVertex2i(w / 2, h / 2);
    
glTexCoord2i(1, 1);
    
glVertex2i(w / 2, -h / 2);
    
glTexCoord2i(0, 1);
    
glVertex2i(-w / 2, -h / 2);
    
glEnd();

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