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Médias (1)
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Richard Stallman et le logiciel libre
19 octobre 2011, par
Mis à jour : Mai 2013
Langue : français
Type : Texte
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Sur d’autres sites (9125)
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exe file not executing from deployed ASP.NET MVC app in TAS (Tanzu /PCF)
24 juin, par Darshan AdakaneI am facing an issue for my ASP.NET MVC web application on .NET 4 being deployed to TAS.


I am trying to do image compression using
ffmpeg.exe.

While it is working on my local machine, I get an "500 internal server error" when deployed to TAS (tanzu application server). I am using
hwc_buildpackand storing the file inPath.GetTemp()folder for testing.

applications:
- name: MyApp-Dev
 memory: 1G
 instances: 1
 stack: windows
 buildpacks:
 - hwc_buildpack
 path: \MyAppnew\obj\Release\Package\PackageTmp
 env:
 services:
 routes:
 - route: myapp-dev.apps.company.com
 - route: myapp-dev.company.com


I also see that the
.exeis being published when app I deployed. I am assuming if TAS has NO permission to read exe or read exe 'not allowed' policy.

This is my code :


[HttpPost]
[Route("uploadimage")]
public async Task<ihttpactionresult> UploadImage()
{
 try
 {
 if (!Request.Content.IsMimeMultipartContent())
 return BadRequest("Unsupported media type.");

 Console.WriteLine("UploadImage method started.");

 var provider = new MultipartMemoryStreamProvider();
 await Request.Content.ReadAsMultipartAsync(provider);

 Console.WriteLine($"Total Files available: {provider.Contents.Count}, {provider.Contents}");

 foreach (var file in provider.Contents)
 {
 try
 {
 var imageFile = await file.ReadAsByteArrayAsync();
 Console.WriteLine($"imageFile, { imageFile.Length }");
 var rawFileName = file.Headers.ContentDisposition.FileName.Trim('"');
 Console.WriteLine($"rawFileName, {rawFileName}");
 var fileName = Path.GetFileName(rawFileName); // Sanitize filename
 Console.WriteLine($"fileName, {fileName}");

 // Check file size limit (300MB)
 if (imageFile.Length > 300 * 1024 * 1024) // 300MB limit
 {
 Console.WriteLine("File size exceeds 300MB limit.");
 return BadRequest("File size exceeds 300MB limit.");
 }

 var inputFilePath = Path.Combine(_uploadFolder, fileName);
 Console.WriteLine($"inputFilePath, {inputFilePath}");

 var outputFilePath = Path.Combine(_uploadFolder, "compressed_" + fileName);
 Console.WriteLine($"outputFilePath, {outputFilePath}");

 // Save uploaded file to disk
 File.WriteAllBytes(inputFilePath, imageFile);

 // Check if the input file exists
 if (!File.Exists(inputFilePath))
 {
 Console.WriteLine($"Input file does not exist: {inputFilePath}");
 return InternalServerError(new Exception($"❌ Input file does not exist: {inputFilePath}"));
 }

 //Console.WriteLine($"✅ FFmpeg found at path: {ffmpegFullPath}");

 await FFMpegArguments
 .FromFileInput(inputFilePath)
 .OutputToFile(outputFilePath, overwrite: true, options => options
 .WithCustomArgument("-vf scale=800:-1")
 .WithCustomArgument("-q:v 10")
 )
 .ProcessAsynchronously();

 Console.WriteLine($"outputFilePath, {outputFilePath}");

 // Check if the output file was created
 if (File.Exists(outputFilePath))
 {
 var fileInfo = new FileInfo(outputFilePath); // Get file info

 Console.WriteLine($"outputFileInfoPropsFullName, {fileInfo.FullName}");
 Console.WriteLine($"outputFileInfoPropsLength, {fileInfo.Length}");

 var compressedFileBytes = File.ReadAllBytes(outputFilePath);
 var compressedFileBase64 = Convert.ToBase64String(compressedFileBytes);

 return Ok(new
 {
 Message = "Image uploaded and compressed successfully.",
 CompressedImagePath = outputFilePath,
 CompressedFileSize = fileInfo.Length, // Size in bytes
 CompressedFileBase64 = compressedFileBase64
 });
 }
 else
 {
 Console.WriteLine("OutputFilePath File not exists.");
 return InternalServerError(new Exception($"❌ Failed to create compressed file: {outputFilePath}"));
 });
 }
 catch (Exception ex)
 {
 Console.WriteLine($"File TRYCATCH:{ex}");
 return InternalServerError(new Exception("Image compression failed: " + ex.Message));
 }
 }
 }
 catch (Exception ex)
 {
 Console.WriteLine($"Method TRYCATCH:{ex}");
 throw;
 }

 return BadRequest("No image file uploaded.");
}
</ihttpactionresult>

I'm getting this error in my tanzu environment logs from the code when I execute :


await FFMpegArguments


This is the exception log :


FFMpegCore.Exceptions.FFMpegException: ffmpeg was not found on your system


I also see that the
.exefiles do exist in TAS in these logs :

2025-06-13T16:07:55.878+05:30 [APP/PROC/WEB/0] [OUT] PATH of FFmpeg Executable: C:\Users\vcap\app\ffmpeg-bin\ffmpeg.exe
2025-06-13T16:07:55.878+05:30 [APP/PROC/WEB/0] [OUT] PATH of ffmpegPath: C:\Users\vcap\app\ffmpeg-bin
2025-06-13T16:07:55.878+05:30 [APP/PROC/WEB/0] [OUT] PATH of BaseDirectory: C:\Users\vcap\app\
2025-06-13T16:07:55.881+05:30 [APP/PROC/WEB/0] [OUT] TempPath: C:\Users\vcap\AppData\Local\Temp\ 
 2025-06-24T18:39:50.684+05:30 [APP/PROC/WEB/0] [OUT] at MCANew.Controllers.Api.MessagesController.<uploadimage>d__6.MoveNext() in I:\Agents\Agent-Win-B\_work\3033\s\MCANew\Controllers\Api\MessagesController.cs:line 133
2025-06-24T18:39:50.684+05:30 [APP/PROC/WEB/0] [OUT] at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
2025-06-24T18:39:50.684+05:30 [APP/PROC/WEB/0] [OUT] --- End of stack trace from previous location where exception was thrown ---
2025-06-24T18:39:50.684+05:30 [APP/PROC/WEB/0] [OUT] at FFMpegCore.FFMpegArgumentProcessor.<processasynchronously>d__24.MoveNext()
2025-06-24T18:39:50.684+05:30 [APP/PROC/WEB/0] [OUT] at FFMpegCore.FFMpegArgumentProcessor.PrepareProcessArguments(FFOptions ffOptions, CancellationTokenSource& cancellationTokenSource)
2025-06-24T18:39:50.684+05:30 [APP/PROC/WEB/0] [OUT] at FFMpegCore.Helpers.FFMpegHelper.VerifyFFMpegExists(FFOptions ffMpegOptions)
2025-06-24T18:39:50.684+05:30 [APP/PROC/WEB/0] [OUT] File TRYCATCH:FFMpegCore.Exceptions.FFMpegException: ffmpeg was not found on your system
</processasynchronously></uploadimage>

My objective is to run successfully exe on TAS and image compression to happen.


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How to make FFmpeg download only the required segments [closed]
25 juillet, par daniil_I'm developing a tool, that create timelapse. For this purpose I use ffmpeg 7.1.1 verion.
I have a playlist file called index.m3u8 (inside it there are URLs to TS segments—typically around 5,000 of them). Here’s a small excerpt :


#EXTM3U
#EXT-X-TARGETDURATION:12
#EXT-X-VERSION:6
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-PLAYLIST-TYPE:EVENT
#EXT-X-START:TIME-OFFSET=8,PRECISE=YES
#EXT-X-PROGRAM-DATE-TIME:2025-07-22T07:59:51.173Z
#EXTINF:10.080,
https://my-storage.io/receiver/archives/3a1b162d-392d-d45a-089a-dc93fb842a35/files/2025-07-22/07/59/1753171191173_aa_00000_00000_10080.ts?exp=1753543086&signature=MEYCIQCx_hDnFVwk7WJyQG5QujV5ZGhLoBqkD5uoQFebha1knQIhAMJm1KA5DLEuqD4_5zS5QlzTGIuj5q9TCUcML7MEPMl7
#EXT-X-PROGRAM-DATE-TIME:2025-07-22T08:00:01.253Z
#EXTINF:10.080,
https://my-storage.io/receiver/archives/3a1b162d-392d-d45a-089a-dc93fb842a35/files/2025-07-22/08/00/1753171201253_aa_00000_00000_10080.ts?exp=1753543086&signature=MEYCIQCx_hDnFVwk7WJyQG5QujV5ZGhLoBqkD5uoQFebha1knQIhAMJm1KA5DLEuqD4_5zS5QlzTGIuj5q9TCUcML7MEPMl7
#EXT-X-PROGRAM-DATE-TIME:2025-07-22T08:00:11.333Z
#EXTINF:10.021,
https://my-storage.io/receiver/archives/3a1b162d-392d-d45a-089a-dc93fb842a35/files/2025-07-22/08/00/1753171211333_aa_00000_00000_10021.ts?exp=1753543086&signature=MEYCIQCx_hDnFVwk7WJyQG5QujV5ZGhLoBqkD5uoQFebha1knQIhAMJm1KA5DLEuqD4_5zS5QlzTGIuj5q9TCUcML7MEPMl7
#EXT-X-PROGRAM-DATE-TIME:2025-07-22T08:00:21.354Z
#EXTINF:10.079,
https://my-storage.io/receiver/archives/3a1b162d-392d-d45a-089a-dc93fb842a35/files/2025-07-22/08/00/1753171221354_aa_00000_00000_10079.ts?exp=1753543086&signature=MEYCIQCx_hDnFVwk7WJyQG5QujV5ZGhLoBqkD5uoQFebha1knQIhAMJm1KA5DLEuqD4_5zS5QlzTGIuj5q9TCUcML7MEPMl7
#EXT-X-PROGRAM-DATE-TIME:2025-07-22T08:00:31.433Z
...


I’m trying to extract still images from the stream at specific moments.


When I run a command like :


ffmpeg \
 -analyzeduration 5000000 \
 -probesize 5000000 \
 -err_detect ignore_err \
 -protocol_whitelist file,http,https,tcp,tls \
 -allowed_extensions ALL \
 -f hls \
 -y \
 -ss 11316.719 \
 -i /Users/daniil/Desktop/test/exports/.../index.m3u8 \
 -frames:v 1 \
 -q:v 2 \
 /Users/daniil/Desktop/test/exports/.../frames/frame_00100.png


ffmpeg downloads segments 1 and 2 (presumably to probe the format), and then it downloads two more TS files around the target timestamp.


But as soon as I push the -ss value beyond a certain point—in my case -ss 8487.54—it starts downloading every TS segment from the very start of the playlist up to the one I need. That can easily be 1,000 TS files or more. In other words, when -ss is between 0 and 8374.372, everything works fine, but beyond that it exhibits this strange behavior.


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Preserving alpha when re-encoding VP8/VP9 WebM in FFmpeg without specifying input codec
29 août, par mstyuraI'm trying to understand why re-encoding a
VP8orVP9WebMwith alpha channel produces black pixels instead of preserving transparency.

I simplified the problem to re-encoding
VP8with alpha toVP9with alpha :

ffmpeg -i video-vp8-with-alpha.webm -c:v libvpx-vp9 video-vp8-with-alpha-bad.webm


The output loses the alpha channel.
ffprobeshows :

Input #0, matroska,webm, from 'video-vp8-with-alpha-bad.webm':
 Metadata:
 ENCODER : Lavf62.1.103
 Duration: 00:00:03.07, start: 0.017000, bitrate: 152 kb/s
 Stream #0:0: Video: vp9 (Profile 0), yuv420p(tv, bt470bg/bt709/bt709, progressive), 720x1560, SAR 1:1 DAR 6:13, 30 fps, 30 tbr, 1k tbn, start 0.067000
 Metadata:
 ENCODER : Lavc62.8.101 libvpx-vp9
 ALPHA_MODE : 1
 DURATION : 00:00:03.066000000
 Stream #0:1: Audio: opus, 48000 Hz, stereo, fltp, start 0.017000
 Metadata:
 ENCODER : Lavc62.8.101 libopus
 DURATION : 00:00:03.049000000


However, if I explicitly force the input codec :


ffmpeg -c:v libvpx -i video-vp8-with-alpha.webm -c:v libvpx-vp9 video-vp8-with-alpha-good.webm


The alpha channel is preserved.
ffprobeshows :

Input #0, matroska,webm, from 'video-vp8-with-alpha-good.webm':
 Metadata:
 ENCODER : Lavf62.1.103
 Duration: 00:00:03.07, start: 0.017000, bitrate: 400 kb/s
 Stream #0:0: Video: vp9 (Profile 0), yuv420p(tv, unknown/bt709/bt709, progressive), 720x1560, SAR 1:1 DAR 6:13, 30 fps, 30 tbr, 1k tbn, start 0.067000
 Metadata:
 ENCODER : Lavc62.8.101 libvpx-vp9
 ALPHA_MODE : 1
 DURATION : 00:00:03.066000000
 Stream #0:1: Audio: opus, 48000 Hz, stereo, fltp, start 0.017000
 Metadata:
 ENCODER : Lavc62.8.101 libopus
 DURATION : 00:00:03.049000000


I don't know in advance whether the input is VP8 or VP9, and I don't want to run
ffprobebeforeffmpeg.

How can I make ffmpeg automatically preserve the alpha channel from the input file without explicitly specifying the decoder ?


The
ffmpegfrom commit 0828a3b636 ;

Build of
ffmpegdownload from BtbN/FFmpeg-Builds

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