Can the Read MagickImageCollection method be faster?

[manuel-collab]

Hello Dirk,

First of all, thank you for the great effort involved in maintaining these bookstores that help the community.

I'm fairly new to implementing this library and would need help on increasing the imaging performance of a document. Are threads used internally to extract them?

How could the images be extracted in parallel effectively without having to read the document completely?

Thank you very much for your help.

Best regards

[dlemstra]

You are reading a document?

[manuel-collab]

Yes, I am reading the pdf document, which is also about 200 pages long. How could rendering these pages be implemented faster? The minimum DPI I need to use is 150

[dlemstra]

With 200 pages your are might be using a lot of memory. You could speed this up by reading it page per page. With PdfInfo.Create( you can get the page count and then do a for loop and only read that scene.

[manuel-collab]

I attach a large file with which I am testing. How could you get good image extraction time?

Thank you
document.pdf

[manuel-collab]

This is the code I use, it takes about 5 minutes could it be improved in time?:

[Fact]
public void Test1()
{
ResourceLimits.LimitMemory(new Percentage(5));

bool result = false;
int totalPages = 0;

try
{
    MagickImageCollection magickImages = new MagickImageCollection();

    MagickReadSettings settings1 = new MagickReadSettings()
    {
        ColorSpace = ColorSpace.sRGB,
        ColorType = ColorType.TrueColor,
        Compression = CompressionMethod.JPEG,
        Density = new Density(300, 300)
    };

    magickImages.Read(@"C:\temp\document.pdf", settings1);

    Parallel.ForEach(magickImages, new ParallelOptions { MaxDegreeOfParallelism = System.Environment.ProcessorCount }, (image, state, index) =>
    {
        try
        {
            image.Quality = 50;
            image.Format = MagickFormat.Jpg;
            image.Alpha(AlphaOption.Remove);

            image.Write(System.IO.Path.Combine(@"C:\temp\Pruebas\", (index + 1) + ".jpg"));

        }
        catch (Exception)
        {
        }
        finally 
        {
            if (image.IsDisposed == false)
            {
                image.Dispose();
            }
        }
    });

    magickImages.Dispose();

    result = true;
}
catch (Exception)
{
    throw;
}

Assert.True(result);

}

[manuel-collab]

With FrameIndex from MagickReadSettings? Un saludo, Manuel Quero Delgado El El dom, 8 sept 2024 a las 20:00, Dirk Lemstra ***@***.***> escribió:

…

With 200 pages your are might be using a lot of memory. You could speed this up by reading it page per page. With PdfInfo.Create( you can get the page count and then do a for loop and only read that scene. — Reply to this email directly, view it on GitHub <#1710 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/APJ2PESSR72AYKXPEYDRMFTZVSGFJAVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANJYGM3DQMQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[dlemstra]

You should not use the MagickImageCollection but read a MagickImage and specify the FrameIndex in the MagickReadSettings inside a Parallel.For loop that use the information that was acquired with PdfInfo.

[manuel-collab]

Thanks Kirk, but how can you automatically delete the temporary files to generate the reading of each of the images? magick-* El lun, 9 sept 2024 a las 21:15, Dirk Lemstra ***@***.***>) escribió:

…

You should not use the MagickImageCollection but read a MagickImage and specify the FrameIndex in the MagickReadSettings inside a Parallel.For loop that use the information that was acquired with PdfInfo. — Reply to this email directly, view it on GitHub <#1710 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/APJ2PEWWQOUVVOGHQ3YSWZDZVXXV5AVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANJZGQ4DOMQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>

-- Un saludo, Manuel Quero Delgado

[dlemstra]

It sounds like you are missing a using and not disposing an image correctly.

[manuel-collab]

In a Parallel.For loop, how do I successfully release MagickImage instances?

[manuel-collab]

This is my source code: [Fact] public void GetImageFrameToFrame() { ResourceLimits.LimitMemory(new Percentage(5)); bool result = false; uint totalPages = 0; byte[]? data = null; try { MagickImageCollection magickImages = new MagickImageCollection(); totalPages = (uint)PdfInfo.Create(@"C:\temp\Libro.pdf").PageCount; data = File.ReadAllBytes(@"C:\temp\Libro.pdf"); Parallel.For(0, (int)totalPages, new ParallelOptions { MaxDegreeOfParallelism = Environment.ProcessorCount }, index => { MagickReadSettings settings = new MagickReadSettings() { FrameIndex = (uint)index, ColorSpace = ColorSpace.sRGB, ColorType = ColorType.TrueColor, Compression = CompressionMethod.JPEG, Density = new Density(150, 150) }; try { MagickImage image = new MagickImage(data, settings); image.Write(System.IO.Path.Combine(@"C:\temp\Pruebas\", "Page_" + (index + 1) + ".jpg"), MagickFormat.Jpg); image.Dispose(); } catch (Exception exc) { } finally { } }); data = null; result = true; } catch (Exception) { throw; } Assert.True(result); } El mar, 10 sept 2024 a las 6:54, Dirk Lemstra ***@***.***>) escribió:

…

It sounds like you are missing a using and not disposing an image correctly. — Reply to this email directly, view it on GitHub <#1710 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/APJ2PETNGAJ7OMITN7MPD4LZVZ3PNAVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANJZG44TQOI> . You are receiving this because you authored the thread.Message ID: ***@***.***>

-- Un saludo, Manuel Quero Delgado

[manuel-collab]

Hi Kirk, how can I correctly release image objects with the Dispose Method? Thanks El mar, 10 sept 2024 a las 7:14, Manuel Quero Delgado (< ***@***.***>) escribió:

…

This is my source code: [Fact] public void GetImageFrameToFrame() { ResourceLimits.LimitMemory(new Percentage(5)); bool result = false; uint totalPages = 0; byte[]? data = null; try { MagickImageCollection magickImages = new MagickImageCollection(); totalPages = (uint)PdfInfo.Create(@"C:\temp\Libro.pdf").PageCount; data = File.ReadAllBytes(@"C:\temp\Libro.pdf"); Parallel.For(0, (int)totalPages, new ParallelOptions { MaxDegreeOfParallelism = Environment.ProcessorCount }, index => { MagickReadSettings settings = new MagickReadSettings() { FrameIndex = (uint)index, ColorSpace = ColorSpace.sRGB, ColorType = ColorType.TrueColor, Compression = CompressionMethod.JPEG, Density = new Density(150, 150) }; try { MagickImage image = new MagickImage(data, settings); image.Write(System.IO.Path.Combine(@"C:\temp\Pruebas\", "Page_" + (index + 1) + ".jpg"), MagickFormat.Jpg); image.Dispose(); } catch (Exception exc) { } finally { } }); data = null; result = true; } catch (Exception) { throw; } Assert.True(result); } El mar, 10 sept 2024 a las 6:54, Dirk Lemstra ***@***.***>) escribió: > It sounds like you are missing a using and not disposing an image > correctly. > > — > Reply to this email directly, view it on GitHub > <#1710 (comment)>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/APJ2PETNGAJ7OMITN7MPD4LZVZ3PNAVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANJZG44TQOI> > . > You are receiving this because you authored the thread.Message ID: > ***@***.***> > -- Un saludo, Manuel Quero Delgado

-- Un saludo, Manuel Quero Delgado

[manuel-collab]

Sorry Dirk!!! Un saludo, Manuel Quero Delgado El El mar, 10 sept 2024 a las 22:57, Manuel Quero Delgado < ***@***.***> escribió:

…

Hi Kirk, how can I correctly release image objects with the Dispose Method? Thanks El mar, 10 sept 2024 a las 7:14, Manuel Quero Delgado (< ***@***.***>) escribió: > This is my source code: > > [Fact] > public void GetImageFrameToFrame() > { > ResourceLimits.LimitMemory(new Percentage(5)); > > bool result = false; > uint totalPages = 0; > > byte[]? data = null; > > try > { > MagickImageCollection magickImages = new MagickImageCollection(); > > totalPages = (uint)PdfInfo.Create(@"C:\temp\Libro.pdf").PageCount; > > data = File.ReadAllBytes(@"C:\temp\Libro.pdf"); > > Parallel.For(0, (int)totalPages, new ParallelOptions { > MaxDegreeOfParallelism = Environment.ProcessorCount }, index => > { > MagickReadSettings settings = new MagickReadSettings() > { > FrameIndex = (uint)index, > ColorSpace = ColorSpace.sRGB, > ColorType = ColorType.TrueColor, > Compression = CompressionMethod.JPEG, > Density = new Density(150, 150) > }; > > try > { > MagickImage image = new MagickImage(data, settings); > > image.Write(System.IO.Path.Combine(@"C:\temp\Pruebas\", > "Page_" + (index + 1) + ".jpg"), MagickFormat.Jpg); > > image.Dispose(); > } > catch (Exception exc) > { > } > finally > { > > } > }); > > data = null; > result = true; > } > catch (Exception) > { > throw; > } > > Assert.True(result); > > } > > El mar, 10 sept 2024 a las 6:54, Dirk Lemstra ***@***.***>) > escribió: > >> It sounds like you are missing a using and not disposing an image >> correctly. >> >> — >> Reply to this email directly, view it on GitHub >> <#1710 (comment)>, >> or unsubscribe >> <https://github.com/notifications/unsubscribe-auth/APJ2PETNGAJ7OMITN7MPD4LZVZ3PNAVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANJZG44TQOI> >> . >> You are receiving this because you authored the thread.Message ID: >> ***@***.***> >> > > > -- > Un saludo, > > Manuel Quero Delgado > -- Un saludo, Manuel Quero Delgado

[dlemstra]

I just noticed that your code contains ResourceLimits.LimitMemory(new Percentage(5)); and that will probably cause ImageMagick to create those temporary files. I don't know why you added this but your performance will improve when you remove this statement.

You also no longer need the MagickImageCollection.

And instead of calling .Dispose() I would advise you to use a using statement instead.

[manuel-collab]

Thanks Dirk, but even if I make the changes you have recommended, they still generate temporary when I run it inside a parallel loop for, I show you my code: [Fact] public void GetImageFrameToFrame() { bool result = false; uint totalPages = 0; byte[]? data = null; data = File.ReadAllBytes(@"C:\temp\Libro.pdf"); try { totalPages = PdfInfo.Create(@"C:\temp\Libro.pdf").PageCount; Parallel.For(0, totalPages, new ParallelOptions { MaxDegreeOfParallelism = Environment.ProcessorCount }, index => { MagickReadSettings settings = new MagickReadSettings() { FrameIndex = (uint?)index, ColorSpace = ColorSpace.sRGB, ColorType = ColorType.TrueColor, Compression = CompressionMethod.JPEG, Density = new Density(150, 150) }; using (MagickImage image = new MagickImage(data, settings)) { image.Quality = 100; image.Write(Path.Combine(@"C:\temp\Pruebas\", "Page_" + (index + 1) + ".jpg"), MagickFormat.Jpg); } }); data = null; result = true; } catch (Exception) { throw; } Assert.True(result); } El vie, 13 sept 2024 a las 10:55, Dirk Lemstra ***@***.***>) escribió:

…

I just noticed that your code contains ResourceLimits.LimitMemory(new Percentage(5)); and that will probably cause ImageMagick to create those temporary files. I don't know why you added this but your performance will improve when you remove this statement. You also no longer need the MagickImageCollection. And instead of calling .Dispose() I would advise you to use a using statement instead. — Reply to this email directly, view it on GitHub <#1710 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/APJ2PESR7KEXMX5FYMSEIF3ZWKR67AVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANRTGUZTMNI> . You are receiving this because you authored the thread.Message ID: ***@***.***>

-- Un saludo, Manuel Quero Delgado

[dlemstra]

This temp files are used by Ghostscript because when Ghostscript reads a frame it writes it to a temporary output file. But those files should be removed once the images have been read. I thought this was coming from you limiting the memory but I forgot that Ghostscript requires temporary files.

[manuel-collab]

Is there any kind of solution to identify the temporary image file name and delete it after performing the operation? In this case the Dispose method does not work Thanks Manuel Quero Delgado El El dom, 15 sept 2024 a las 19:24, Dirk Lemstra ***@***.***> escribió:

…

This temp files are used by Ghostscript because when Ghostscript reads a frame it writes it to a temporary output file. But those files should be removed once the images have been read. I thought this was coming from you limiting the memory but I forgot that Ghostscript requires temporary files. — Reply to this email directly, view it on GitHub <#1710 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/APJ2PEXTR6QQ6FF6YXPBF33ZWW7DTAVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANRVGMYTONY> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[dlemstra]

Those files should be removed automatically. Are any files left behind?

[manuel-collab]

When I run the parallel for loop half of the temp files are not deleted Un saludo, Manuel Quero Delgado El El lun, 16 sept 2024 a las 7:05, Dirk Lemstra ***@***.***> escribió:

…

Those files should be removed automatically. Are any files left behind? — Reply to this email directly, view it on GitHub <#1710 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/APJ2PESTN3M5RU324TBK5ILZWZRIPAVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANRVGU2DIMA> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[dlemstra]

Which version of Magick.NET are you using?

[manuel-collab]

13.10.0 Un saludo, Manuel Quero Delgado El El lun, 16 sept 2024 a las 11:42, Dirk Lemstra ***@***.***> escribió:

…

Which version of Magick.NET are you using? — Reply to this email directly, view it on GitHub <#1710 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/APJ2PEURV52RMA5CJWGTGO3ZW2RZBAVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANRVG42DSNI> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[dlemstra]

Please first upgrade to the most recent version and check if the problem still reproduces.

[manuel-collab]

The problem still occurs when using the parallel loop Un saludo, Manuel Quero Delgado El El lun, 16 sept 2024 a las 14:59, Dirk Lemstra ***@***.***> escribió:

…

Please first upgrade to the most recent version and check if the problem still reproduces. — Reply to this email directly, view it on GitHub <#1710 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/APJ2PEVGKR2KE6CEW6N4CZLZW3I3HAVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANRVHE2DGMQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[dlemstra]

On my machine your test completes in 38 seconds and I have no temp files left behind. Are you testing with the same document? And are you also using the latest version of Ghostscript?

One reason for tempfiles being left behind would be an abort of the test run. This kills the process and the temporary files are then not cleaned up.

[manuel-collab]

Thanks Dirk, I've followed your advice, I've updated version 14 of Magick.NET, I've updated the version of Ghostscript to the latest version, plus I'm passing you the latest implementation of my code, but it still keeps leaving temporary files. public static async void Task1(byte[] data, uint totalPages) { try { object _SyncRoot = new object(); Parallel.For(0, totalPages, index => { MagickReadSettings settings = new MagickReadSettings() { FrameIndex = (uint)index, Density = new Density(150, 150) }; using (MagickImage image = new MagickImage(data, settings)) { image.Alpha(AlphaOption.Remove); image.Quality = 100; image.Write(Path.Combine(@"C:\temp\Pruebas\Libro1", "Libro_" + (index + 1) + ".png"), MagickFormat.Png); image.Dispose(); } }); DirectoryInfo directory = new DirectoryInfo(Environment.GetEnvironmentVariable("TEMP", EnvironmentVariableTarget.User)); foreach (var file in directory.EnumerateFiles("magick-*")) { file.Delete(); } } catch (Exception exc) { } finally { } } El lun, 16 sept 2024 a las 21:26, Dirk Lemstra ***@***.***>) escribió:

…

On my machine your test completes in 38 seconds and I have no temp files left behind. Are you testing with the same document? And are you also using the latest version of Ghostscript? One reason for tempfiles being left behind would be an abort of the test run. This kills the process and the temporary files are then not cleaned up. — Reply to this email directly, view it on GitHub <#1710 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/APJ2PETIHP5JBX6KZHHCMTDZW4WGJAVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANRWGMZTMNI> . You are receiving this because you authored the thread.Message ID: ***@***.***>

-- Un saludo, Manuel Quero Delgado

[manuel-collab]

private static void Task2(byte[] data, uint totalPages) { try { object _SyncRoot = new object(); Parallel.For(0, totalPages, index => { lock (_SyncRoot) { MagickReadSettings settings = new MagickReadSettings() { FrameIndex = (uint)index, Density = new Density(150, 150) }; using (MagickImage image = new MagickImage(data, settings)) { image.Alpha(AlphaOption.Remove); image.Quality = 100; image.WriteAsync(Path.Combine(@"C:\temp\Pruebas\Libro2", "Libro2_" + (index + 1) + ".png"), MagickFormat.Png); image.Dispose(); } } }); } catch (Exception exc) { } finally { } } I don't get temporary files here, but it runs slower El lun, 16 sept 2024 a las 21:37, Manuel Quero Delgado (< ***@***.***>) escribió:

…

Thanks Dirk, I've followed your advice, I've updated version 14 of Magick.NET, I've updated the version of Ghostscript to the latest version, plus I'm passing you the latest implementation of my code, but it still keeps leaving temporary files. public static async void Task1(byte[] data, uint totalPages) { try { object _SyncRoot = new object(); Parallel.For(0, totalPages, index => { MagickReadSettings settings = new MagickReadSettings() { FrameIndex = (uint)index, Density = new Density(150, 150) }; using (MagickImage image = new MagickImage(data, settings)) { image.Alpha(AlphaOption.Remove); image.Quality = 100; image.Write(Path.Combine(@"C:\temp\Pruebas\Libro1", "Libro_" + (index + 1) + ".png"), MagickFormat.Png); image.Dispose(); } }); DirectoryInfo directory = new DirectoryInfo(Environment.GetEnvironmentVariable("TEMP", EnvironmentVariableTarget.User)); foreach (var file in directory.EnumerateFiles("magick-*")) { file.Delete(); } } catch (Exception exc) { } finally { } } El lun, 16 sept 2024 a las 21:26, Dirk Lemstra ***@***.***>) escribió: > On my machine your test completes in 38 seconds and I have no temp files > left behind. Are you testing with the same document? And are you also using > the latest version of Ghostscript? > > One reason for tempfiles being left behind would be an abort of the test > run. This kills the process and the temporary files are then not cleaned up. > > — > Reply to this email directly, view it on GitHub > <#1710 (comment)>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/APJ2PETIHP5JBX6KZHHCMTDZW4WGJAVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANRWGMZTMNI> > . > You are receiving this because you authored the thread.Message ID: > ***@***.***> > -- Un saludo, Manuel Quero Delgado

-- Un saludo, Manuel Quero Delgado

[dlemstra]

What happens when you don't put your test file in the c:\temp folder? That is the only difference from what I am doing.

p.s. With that lock you are just writing a complex for loop.

[manuel-collab]

Same problem. It does not delete temporary files. I don't know what else to do!! Un saludo, Manuel Quero Delgado El El lun, 16 sept 2024 a las 21:46, Dirk Lemstra ***@***.***> escribió:

…

What happens when you don't put your test file in the c:\temp folder? That is the only difference from what I am doing. p.s. With that lock you are just writing a complex for loop. — Reply to this email directly, view it on GitHub <#1710 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/APJ2PEVMYZ5V4TPXWZW3AV3ZW4YQRAVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANRWGM2TGMI> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[manuel-collab]

Can you send me a small implementation to see what I might be doing wrong? Thanks Dirk El lun, 16 sept 2024 a las 21:52, Manuel Quero Delgado (< ***@***.***>) escribió:

…

Same problem. It does not delete temporary files. I don't know what else to do!! Un saludo, Manuel Quero Delgado El El lun, 16 sept 2024 a las 21:46, Dirk Lemstra < ***@***.***> escribió: > What happens when you don't put your test file in the c:\temp folder? > That is the only difference from what I am doing. > > p.s. With that lock you are just writing a complex for loop. > > — > Reply to this email directly, view it on GitHub > <#1710 (reply in thread)>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/APJ2PEVMYZ5V4TPXWZW3AV3ZW4YQRAVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANRWGM2TGMI> > . > You are receiving this because you authored the thread.Message ID: > ***@***.***> >

-- Un saludo, Manuel Quero Delgado

[dlemstra]

I just copy pasted your implementation so I have no idea why those files are left behind. This can only happen when a process is aborted. I cannot reproduce your issue. Can you reproduce the issue in a small application?

[manuel-collab]

[Fact] public void GetImageFrameToFrame() { bool result = false; uint totalPages = 0; try { totalPages = PdfInfo.Create(@"C:\Proyectos\Libro.pdf").PageCount; Parallel.For(0, totalPages, index => { MagickReadSettings settings = new MagickReadSettings() { FrameIndex = (uint)index, Density = new Density(150, 150) }; using (MagickImage image = new MagickImage(@"C:\Proyectos\Libro.pdf", settings)) { image.Alpha(AlphaOption.Remove); image.Quality = 100; image.Write(Path.Combine(@"C:\Proyectos\Pruebas\Libro1", "Libro_" + (index + 1) + ".png"), MagickFormat.Png); } }); } catch (Exception) { throw; } Assert.True(result); } With this example 715 pages and 269 temporary files are not deleted Un saludo, Manuel Quero Delgado El El lun, 16 sept 2024 a las 22:10, Manuel Quero Delgado < ***@***.***> escribió:

…

[Fact] public void GetImageFrameToFrame() { bool result = false; uint totalPages = 0; try { totalPages = PdfInfo.Create(@"C:\Proyectos\Libro.pdf").PageCount; Parallel.For(0, totalPages, index => { MagickReadSettings settings = new MagickReadSettings() { FrameIndex = (uint)index, Density = new Density(150, 150) }; using (MagickImage image = new MagickImage(@"C:\Proyectos\Libro.pdf", settings)) { image.Alpha(AlphaOption.Remove); image.Quality = 100; image.Write(Path.Combine(@"C:\Proyectos\Pruebas\Libro1", "Libro_" + (index + 1) + ".png"), MagickFormat.Png); } }); } catch (Exception) { throw; } Assert.True(result); } With this example 715 pages and 269 temporary files are not deleted El lun, 16 sept 2024 a las 21:53, Manuel Quero Delgado (< ***@***.***>) escribió: > Can you send me a small implementation to see what I might be doing wrong? > > Thanks Dirk > > El lun, 16 sept 2024 a las 21:52, Manuel Quero Delgado (< > ***@***.***>) escribió: > >> Same problem. It does not delete temporary files. I don't know what else >> to do!! >> >> Un saludo, >> >> Manuel Quero Delgado >> >> >> El El lun, 16 sept 2024 a las 21:46, Dirk Lemstra < >> ***@***.***> escribió: >> >>> What happens when you don't put your test file in the c:\temp folder? >>> That is the only difference from what I am doing. >>> >>> p.s. With that lock you are just writing a complex for loop. >>> >>> — >>> Reply to this email directly, view it on GitHub >>> <#1710 (reply in thread)>, >>> or unsubscribe >>> <https://github.com/notifications/unsubscribe-auth/APJ2PEVMYZ5V4TPXWZW3AV3ZW4YQRAVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANRWGM2TGMI> >>> . >>> You are receiving this because you authored the thread.Message ID: >>> ***@***.*** >>> com> >>> >> > > -- > Un saludo, > > Manuel Quero Delgado > -- Un saludo, Manuel Quero Delgado

[dlemstra]

Are you testing with a different file than what you uploaded earlier?

[manuel-collab]

No, I always use the same one Un saludo, Manuel Quero Delgado El El lun, 16 sept 2024 a las 22:31, Dirk Lemstra ***@***.***> escribió:

…

Are you testing with a different file than what you uploaded earlier? — Reply to this email directly, view it on GitHub <#1710 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/APJ2PEV5UQT3C7BUXL7FKVDZW452LAVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANRWGM4DIMQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[dlemstra]

Your document.pdf file only contains 333 pages and not 715.

[manuel-collab]

I also tried it with a 333-page document and it continues to generate temporary files. Un saludo, Manuel Quero Delgado El El mar, 17 sept 2024 a las 6:36, Dirk Lemstra ***@***.***> escribió:

…

Your document.pdf file only contains 333 pages and not 715. — Reply to this email directly, view it on GitHub <#1710 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/APJ2PEWC5USHFLPRRQ3NAHLZW6WVXAVCNFSM6AAAAABN25F25SVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTANRWGYYTONQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>