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    17 mai 2013, par

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Sur d’autres sites (4201)

  • 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();

  • In my django app, celery task converts uploaded video w/ ffmpeg, but converted video won't save to s3 ?

    29 janvier 2013, par GetItDone

    I use Heroku to host my website, and Amazon s3 to store my static and media files. I have a celery task that converts the video file to flv, but the flv doesn't store anywhere. There isn't any error, just there is no file uploaded to my s3 bucket. How can I force the file to save to my s3 bucket after the conversion ? I'm still pretty new web development in general, and I have been stuck trying to get my video conversion working properly for weeks. To be honest, I'm not even sure that I'm doing the right thing with my task. Here is the code in my celery task :

    @task(name='celeryfiles.tasks.convert_flv')
    
def convert_flv(video_id):
    
    video = VideoUpload.objects.get(pk=video_id)
    
    filename = video.video_upload
    
    sourcefile = "%s%s" % (settings.MEDIA_URL, filename)
    
    vidfilename = "%s.flv" % video.id
    
    targetfile = "%svideos/flv/%s" % (settings.MEDIA_URL, vidfilename)
    
    ffmpeg = "ffmpeg -i %s -ar 22050 -f flv -s 320x240 %s" % (sourcefile, targetfile)
    
    #The next lines are code that I couldn't get to work in place of the line above, and are left commented out.
    
    #I am open to suggestions or alternatives for this also.
    
    #ffmpeg = "ffmpeg -i %s -acodec libmp3lame -ar 22050 -f flv -s 320x240 %s" % (sourcefile, targetfile)
    
    #ffmpeg = "ffmpeg -i %s -acodec mp3 -ar 22050 -f flv -s 320x240 %s" % (sourcefile, targetfile)
    
    try:
    
        ffmpegresult = commands.getoutput(ffmpeg)
    
        print "---------------FFMPEG---------------"
    
        print "FFMPEGRESULT: %s" % ffmpegresult
    
    except Exception as e:
    
        ffmpegresult = None
    
        print("Failed to convert video file %s to %s" % (sourcefile, targetfile))
    
        print(traceback.format_exc())
    
    video.flvfilename = vidfilename
    
    video.save()

    My view :

    def upload_video(request):
    
    if request.method == 'POST':
    
        form = VideoUploadForm(request.POST, request.FILES)
    
        if form.is_valid():
    
            video_upload=form.save()
    
            video_id=video_upload.id
    
            video_conversion = convert_flv.delay(video_id)
    
            return HttpResponseRedirect('/current_classes/')
    
    else:
    
    ...

    Any advice, insight, or ideas in general would be greatly appreciated. Obviously I am missing something, but I can't figure out what. I have been stuck with different aspects of getting my video conversion to work with ffmpeg using a celery task for weeks. Thanks in advance.

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