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(C_UDP Socket Programming) How can I convert binary file to video format ?
30 avril 2024, par user24723398I am practicing UDP socket programming. My code's functions are below.


- 

- Connect Server-Client and send "hello" message each other (it is working).
- Then Server is sending video file to client (problem).






Transfer video file to client is working. But it is written in binary so I can't open the video.


So I try to use ffmpeg to convert the video, but it doesn't work.


Is there something wrong in my code ? How can I transfer a received file to a video file ?


My environment is MacOs.


Server.c (Server Code) :


#include 
#include 
#include 
#include <arpa></arpa>inet.h>
#include 
#include <sys></sys>socket.h>

#define PORT 8888
#define BUF_SIZE 256

int main(){
 int serv_sock;
 char message[BUF_SIZE];
 char buf[BUF_SIZE];
 int str_len;
 socklen_t clnt_adr_sz;

 struct sockaddr_in serv_adr, clnt_adr;
 
 //create socket
 serv_sock=socket(PF_INET, SOCK_DGRAM, 0);
 if(serv_sock == -1){
 perror("socket() error");
 exit(1);
 }
 
 //socket address
 memset(&serv_adr, 0, sizeof(serv_adr));
 serv_adr.sin_family=AF_INET;
 serv_adr.sin_addr.s_addr=htonl(INADDR_ANY);
 serv_adr.sin_port=htons(PORT);
 //binding socket
 if(bind(serv_sock, (struct sockaddr*)&serv_adr, sizeof(serv_adr)) == -1){
 perror("bind() error");
 exit(1);
 }
 
 while(1){
 clnt_adr_sz=sizeof(clnt_adr);
 str_len=recvfrom(serv_sock, message, BUF_SIZE, 0, (struct sockaddr *)&clnt_adr, &clnt_adr_sz);
 if (str_len < 0) {
 perror("recvfrom error");
 exit(1);
 }
 
 char hello_message[] = "hello i am server";
 if (sendto(serv_sock, hello_message, strlen(hello_message), 0, (struct sockaddr *)&clnt_adr, clnt_adr_sz) < 0) {
 perror("sendto error");
 exit(1);
 }
 
 //print message
 message[str_len] = '\0';
 printf("client say: %s\n", message);
 
 char buf[BUF_SIZE];
 ssize_t bytes_read;
 // sending viedo file
 printf("sending video file...\n");
 size_t fsize;
 
 //video file
 FILE *file;
 char *filename = "video.mp4";
 // open video file
 file = fopen(filename, "rb");
 if (file == NULL) {
 perror("File opening failed");
 exit(EXIT_FAILURE);
 }
 //calculate video file memory
 fseek(file, 0, SEEK_END);
 fsize = ftell(file);
 fseek(file,0,SEEK_SET);
 
 size_t size = htonl(fsize);
 int nsize =0;
 
 while(nsize!=fsize){
 int fpsize = fread(buf,1, BUF_SIZE, file);
 nsize += fpsize;
 if (sendto(serv_sock, &size, sizeof(size), 0, (struct sockaddr *)&clnt_adr, clnt_adr_sz) < 0) {
 perror("sendto");
 exit(EXIT_FAILURE); 
 }
 fclose(file);
 /*
 while ((bytes_read = fread(buf, 1, BUF_SIZE, file)) > 0) {
 if (sendto(serv_sock, buf, bytes_read, 0,
 (struct sockaddr *)&clnt_adr, clnt_adr_sz) < 0) {
 perror("sendto");
 exit(EXIT_FAILURE);
 } 
 }
 */
 } 
 }
 close(serv_sock);
 return 0;
}


Client.c (Client code)


#include 
#include 
#include 
#include <arpa></arpa>inet.h>
#include 
#include <sys></sys>socket.h>

#define BUFSIZE 256
#define PORT 8888

int main(){
 int sock;
 char message[BUFSIZE];
 int str_len;
 socklen_t adr_sz;

 struct sockaddr_in serv_addr, client_addr; 
 
 sock = socket(PF_INET, SOCK_DGRAM, 0);
 if(sock == -1){
 printf("socket() error\n");
 exit(1);
 }

 memset(&serv_addr, 0, sizeof(serv_addr));
 serv_addr.sin_family = AF_INET;
 serv_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
 serv_addr.sin_port = htons(PORT);

 char hello_message[] = "hello i am client";
 sendto(sock, hello_message, strlen(hello_message), 0, (struct sockaddr*)&serv_addr, sizeof(serv_addr));
 adr_sz = sizeof(client_addr);
 str_len=recvfrom(sock,message,BUFSIZE,0,(struct sockaddr*)&client_addr,&adr_sz);
 
 message[str_len] = '\0';
 printf("client say: %s\n", message);
 
 /*
 char buf[BUFSIZE];
 ssize_t bytes_received;
 socklen_t serv_len = sizeof(serv_addr);
 while ((bytes_received = recvfrom(sock, buf, BUFSIZE, 0,
 (struct sockaddr *)&serv_addr, &serv_len)) > 0) {
 fwrite(buf, 1, bytes_received, file);
 }
 */
 
 FILE *file = fopen("received_test.mp4", "wb");

 int nbyte = BUFSIZE;
 while(nbyte>= BUFSIZE){
 nbyte = recvfrom(sock, message, BUFSIZE, 0, (struct sockaddr*)&serv_addr, &adr_sz);
 fwrite(message, sizeof(char), nbyte, file);
 }

 if (file == NULL) {
 perror("File opening failed");
 exit(EXIT_FAILURE);
 }

 fclose(file);
 close(sock);
 printf("File received successfully\n");
 
 return 0;
}


I try to convert the binary file to an
.mp4file using ffmpeg
but it doesn't work :

ffmpeg -i received_test.mp4 output.mp4
ffmpeg version 7.0 Copyright (c) 2000-2024 the FFmpeg developers
 built with Apple clang version 15.0.0 (clang-1500.3.9.4)
 configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/7.0 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags='-Wl,-ld_classic' --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libharfbuzz --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopenvino --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-audiotoolbox --enable-neon
 libavutil 59. 8.100 / 59. 8.100
 libavcodec 61. 3.100 / 61. 3.100
 libavformat 61. 1.100 / 61. 1.100
 libavdevice 61. 1.100 / 61. 1.100
 libavfilter 10. 1.100 / 10. 1.100
 libswscale 8. 1.100 / 8. 1.100
 libswresample 5. 1.100 / 5. 1.100
 libpostproc 58. 1.100 / 58. 1.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a62bdb0] Format mov,mp4,m4a,3gp,3g2,mj2 detected only with low score of 1, misdetection possible!
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a62bdb0] moov atom not found
[in#0 @ 0x12b0043c0] Error opening input: Invalid data found when processing input
Error opening input file received_test.mp4.
Error opening input files: Invalid data found when processing input


-
FFmpeg Could not write header (incorrect codec parameters ?) : Invalid data found when processing input [closed]
14 juillet 2024, par cookieThe command


ffmpeg -v verbose -i in.mkv -c copy -y out.mkv


produces the following error :


ffmpeg version 7.0.1-full_build-www.gyan.dev Copyright (c) 2000-2024 the FFmpeg developers
 built with gcc 13.2.0 (Rev5, Built by MSYS2 project)
 configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libaribcaption --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libxevd --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxeve --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-dxva2 --enable-d3d11va --enable-d3d12va --enable-ffnvcodec --enable-libvpl --enable-nvdec --enable-nvenc --enable-vaapi --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
 libavutil 59. 8.100 / 59. 8.100
 libavcodec 61. 3.100 / 61. 3.100
 libavformat 61. 1.100 / 61. 1.100
 libavdevice 61. 1.100 / 61. 1.100
 libavfilter 10. 1.100 / 10. 1.100
 libswscale 8. 1.100 / 8. 1.100
 libswresample 5. 1.100 / 5. 1.100
 libpostproc 58. 1.100 / 58. 1.100
[hevc @ 00000133b5bb5040] Invalid default display window
Input #0, matroska,webm, from 'in.mkv':
 Metadata:
 encoder : libebml v1.3.0 + libmatroska v1.4.1
 creation_time : 2015-03-20T14:07:27.000000Z
 Duration: 00:24:11.75, start: 0.000000, bitrate: 5185 kb/s
 Chapters:
 Chapter #0:0: start 0.000000, end 48.047000
 Metadata:
 title : Chapter 01
 Chapter #0:1: start 48.047000, end 137.846000
 Metadata:
 title : Chapter 02
 Chapter #0:2: start 137.846000, end 535.868000
 Metadata:
 title : Chapter 03
 Chapter #0:3: start 535.868000, end 1330.871000
 Metadata:
 title : Chapter 04
 Chapter #0:4: start 1330.871000, end 1420.877000
 Metadata:
 title : Chapter 05
 Chapter #0:5: start 1420.877000, end 1451.741000
 Metadata:
 title : Chapter 06
 Chapter #0:6: start 1451.741000, end 1451.745000
 Metadata:
 title : Chapter 07
 Stream #0:0: Video: hevc (Main 10), 1 reference frame, yuv420p10le(tv, left), 1920x1080, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 1k tbn (default)
 Metadata:
 _STATISTICS_WRITING_APP: mkvmerge v7.0.0 ('Where We Going') 32bit built on Jun 9 2014 15:08:34
 _STATISTICS_WRITING_APP-eng: mkvmerge v7.0.0 ('Where We Going') 32bit built on Jun 9 2014 15:08:34
 _STATISTICS_WRITING_DATE_UTC: 2015-03-20 14:07:27
 _STATISTICS_WRITING_DATE_UTC-eng: 2015-03-20 14:07:27
 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 BPS : 3754023
 BPS-eng : 3754023
 DURATION : 00:24:11.742000000
 DURATION-eng : 00:24:11.742000000
 NUMBER_OF_FRAMES: 34807
 NUMBER_OF_FRAMES-eng: 34807
 NUMBER_OF_BYTES : 681234123
 NUMBER_OF_BYTES-eng: 681234123
 Stream #0:1(jpn): Audio: flac, 48000 Hz, stereo, s32 (24 bit) (default)
 Metadata:
 _STATISTICS_WRITING_APP: mkvmerge v7.0.0 ('Where We Going') 32bit built on Jun 9 2014 15:08:34
 _STATISTICS_WRITING_APP-eng: mkvmerge v7.0.0 ('Where We Going') 32bit built on Jun 9 2014 15:08:34
 _STATISTICS_WRITING_DATE_UTC: 2015-03-20 14:07:27
 _STATISTICS_WRITING_DATE_UTC-eng: 2015-03-20 14:07:27
 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 BPS : 1429414
 BPS-eng : 1429414
 DURATION : 00:24:11.745000000
 DURATION-eng : 00:24:11.745000000
 NUMBER_OF_FRAMES: 17013
 NUMBER_OF_FRAMES-eng: 17013
 NUMBER_OF_BYTES : 259393130
 NUMBER_OF_BYTES-eng: 259393130
[out#0/matroska @ 00000133b5bb5a40] No explicit maps, mapping streams automatically...
[vost#0:0/copy @ 00000133b5c2f580] Created video stream from input stream 0:0
[aost#0:1/copy @ 00000133b5bf1680] Created audio stream from input stream 0:1
Stream mapping:
 Stream #0:0 -> #0:0 (copy)
 Stream #0:1 -> #0:1 (copy)
[out#0/matroska @ 00000133b5bb5a40] Could not write header (incorrect codec parameters ?): Invalid data found when processing input
[AVIOContext @ 00000133b5c27940] Statistics: 291 bytes written, 0 seeks, 1 writeouts
[AVIOContext @ 00000133b5b97980] Statistics: 66432 bytes read, 2 seeks
Conversion failed!


Originally, I was trying to add a subtitle to
in.mkv, but I keep encountering this error. When I add the subtitle to another MKV file, it works fine, so I believe the problem lies within.mkv.

Troubleshooting


Output only video stream produce the same error :


ffmpeg -i in.mkv -map 0:v:0 -c copy out.mkv


Output only audio stream works fine :


ffmpeg -i in.mkv -map 0:a:0 -c copy out.mkv


Output as mp4 got no error, but the output file is unplayable :


ffmpeg -i in.mkv -c copy -strict -2 out.mp4


Re-encoding works fine :


ffmpeg -i in.mkv -c:v libx265 -c:a copy out.mkv


How can I fix the video stream in
in.mkvso that I can add a subtitle stream and remux the file without re-encoding the video ? Any insights or suggestions on handling this error would be greatly appreciated.

-
FFMPEG is not working in app service post deployment
1er mars 2024, par Tushar GuptaI using the Xabe.FFmpeg package to generate clips from a video. The code is basically converting a video to multiple clips and it's working fine in my local but whenever I am uploading the code to app service the code is not working.


Stack : .net
App Service OS : Windows


Error :


2024-02-13 08:57:34.092 +00:00 [Error] Microsoft.AspNetCore.Server.IIS.Core.IISHttpServer : Connection ID "16573246629528734243", Request ID "40000a24-0000-e600-b63f-84710c7967bb" : An unhandled exception was thrown by the application.System.ComponentModel.Win32Exception (193) : An error occurred trying to start process 'C :\home\site\wwwroot\Controllers\ffmpeg\bin\ffmpeg.exe' with working directory 'C :\home\site\wwwroot'. The specified executable is not a valid application for this OS platform.at System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo)at System.Diagnostics.Process.Start()at Xabe.FFmpeg.FFmpeg.RunProcess(String args, String processPath, Nullable
1 priority, Boolean standardInput, Boolean standardOutput, Boolean standardError)at Xabe.FFmpeg.FFmpegWrapper.<>c__DisplayClass14_0.<runprocess>b__0()at System.Threading.Tasks.Task</runprocess>1.InnerInvoke()at System.Threading.Tasks.Task.<>c.<.cctor>b__281_0(Object obj)at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)--- End of stack trace from previous location ---at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)--- End of stack trace from previous location ---at Xabe.FFmpeg.Conversion.Start(String parameters, CancellationToken cancellationToken)at ExtractResponseAPI.Controllers.HomeController.PrepareVideoClips(CloudBlockBlob sourceVideoBlob, TimeSpan startTime, TimeSpan endTime) in C :\Users\tushar.h.gupta\source\repos\ExtractResponseAPI\Controllers\HomeController.cs:line 164at ExtractResponseAPI.Controllers.HomeController.GetIntervalsAsync(String query) in C :\Users\tushar.h.gupta\source\repos\ExtractResponseAPI\Controllers\HomeController.cs:line 60at ExtractResponseAPI.Controllers.HomeController.Get(String query) in C :\Users\tushar.h.gupta\source\repos\ExtractResponseAPI\Controllers\HomeController.cs:line 24at lambda_method4(Closure, Object)at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.AwaitableObjectResultExecutor.Execute(ActionContext actionContext, IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask1 actionResultValueTask)at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<invokenextactionfilterasync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<invokeinnerfilterasync>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<invokefilterpipelineasync>g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<invokeasync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<invokeasync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)at Microsoft.AspNetCore.Server.IIS.Core.IISHttpContextOfT</invokeasync></invokeasync></invokefilterpipelineasync></invokeinnerfilterasync></invokenextactionfilterasync>1.ProcessRequestAsync()

Code :


private async Task> PrepareVideoClips(CloudBlockBlob sourceVideoBlob, TimeSpan startTime, TimeSpan endTime)
{
 string tempDirectory = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());

 // Create a temporary directory to store clips locally
 Directory.CreateDirectory(tempDirectory);

 // Download the source video
 string sourceVideoPath = Path.Combine(tempDirectory, "sourceVideo.mp4");
 await sourceVideoBlob.DownloadToFileAsync(sourceVideoPath, FileMode.Create);
 FFmpeg.SetExecutablesPath("Controllers\\ffmpeg\\bin\\");
 // Use FFmpegCore to trim the video
 string outputVideoPath = Path.Combine(tempDirectory, "output.mp4");

 await FFmpeg.Conversions.New()
 .AddParameter($"-ss {startTime.TotalSeconds}") // Start time
 .AddParameter($"-i {sourceVideoPath}")
 .AddParameter($"-to {(endTime - startTime).TotalSeconds}") // Duration
 .SetOutput(outputVideoPath)
 .Start();

 // Return a list of file paths for the clips
 return new List<string> { outputVideoPath };
}
</string>

I tried deploying the app service using different OS but still facing the same issue, I also tried using different packages but the result is same.


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