Is it possible to send video file over TCP/IP sockets?

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Hi,

I would like to know is there any possibility to send video file using TCP/IP sockets, if so can you share your idea on it.

Posted 9-Feb-15 18:04pm

venkat28vk

Updated 10-Feb-15 18:58pm

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Mehdi Gholam 10-Feb-15 0:57am

Yes you can, if it you couldn't then the internet would not exist.

venkat28vk 10-Feb-15 1:01am

could you share any links or some kind of references

Mehdi Gholam 10-Feb-15 1:07am

Google : c ubuntu send files tcp

Richard MacCutchan 10-Feb-15 4:54am

A video file is the same as any other file: a stream of bytes. So sending it via TCP/IP is exactly the same as sending a text file.

venkat28vk 10-Feb-15 6:15am

ok... do i need to serialize the data into streams for the required output?

Richard MacCutchan 10-Feb-15 7:09am

No, you just need to read it in blocks and transmit it. Google for "sockets" and you will find many samples showing how to send a file between two systems. It is just the same as reading and writing a file.

venkat28vk 11-Feb-15 0:00am

i have developed the code for client and server, and i like to share with you, could you just skim through it and give your feedback

Richard MacCutchan 11-Feb-15 3:24am

Sorry no. You can do it yourself quite easily by running some tests.

venkat28vk 11-Feb-15 23:30pm

I have tried for sending audio between client and server but i am not able to get the proper result...can you suggest me few links for further references.

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Frankie-C · Accepted Answer · 2015-02-12T01:35:00

Solution 1

The problems you had by simply packetizing and sendind data are related to the dispatch time and network latency that are not relevanto for static data transmission as files.
You may want have a look to RTP (real time protocol) for transmission of real time data as audio and video.
This page from Gary Mc Gath give some starting points about some diffused protocols.

Posted 12-Feb-15 1:35am

Frankie-C

Updated 12-Feb-15 1:36am

v2

Comments

venkat28vk 8-Jun-15 5:55am

Hi Frank in the latest code i have posted

printf("Enter Filename:\n");
gets(filename);
filename2 = open("/home/sosdt009/Desktop", && filename);
printf("Filename2: %s \n", filename2);
gets(a);
text = fopen(filename2, "w");

I have edited all the changes as per you said, but there are two errors caused while running the program

1)error: expected expression before ‘)’ token
for(i=0; i<max_path>)
2) error: variable-sized object may not be initialized
char FullFilename[MAX_PATH] = "/home/sosdt009/Desktop";

i have tried by various means ,but i could not solve this.How to resolve this issue.

Frankie-C 8-Jun-15 6:38am

Under linux use PATH_MAX instead of MAX_PATH.
In the for loop I thing that is missing the ++ after the i:
for (i=0; some condition; i++)

venkat28vk 8-Jun-15 7:12am

can i have the source code you have given early , because the question for the above code is closed.

venkat28vk 8-Jun-15 7:28am

I have resolved the first error by assigning a condition. Only the second error is left out.

Frankie-C 8-Jun-15 7:35am

I don't remember the code.
Something like this:
char FullPath[PATH_MAX] = "/home/sosdt009/Desktop/";
char filename2[PATH_MAX];
printf("Enter Filename:\n");
scanf("%s%*c", FullPath+strlen(FullPath));
FILE *fp = fopen(FullPath, "r");
fgets(filename2, PATH_MAX, fp);
int i;
for (int i=0; filename2[i]; i++)
if (filename2[i] == '\n')
{
filename2[i] = '\0';
break;
}
printf("Filename2: %s \n", filename2);
getchar();
FILE *text = fopen(filename2, "w");

venkat28vk 9-Jun-15 0:43am

error: variable-sized object may not be initialized
char Filename[MAX_PATH] = "/home/sosdt009/Desktop";

This is the only error i am getting.

Frankie-C 9-Jun-15 2:58am

use:
char Filename[PATH_MAX] = "/home/sosdt009/Desktop";

venkat28vk 9-Jun-15 3:00am

char Filename[MAX_PATH] = "/home/sosdt009/Desktop";

It is already like that only

Frankie-C 9-Jun-15 3:02am

MAX_PATH is not PATH_MAX

venkat28vk 9-Jun-15 3:08am

still i am getting the same error

venkat28vk 9-Jun-15 3:09am

I have given the code for reference
void CleanInput(char *p)
{
int i;
char MAX_PATH;
for(i=0;i<=(MAX_PATH);i++)
{
if (!p[i] || p[i]=='\n')
{
p[i] = '\0';
break;
}
}
}

int receive_text(int new_socket)
{
long int buffersize = 0, recv_size = 0, size = 0, read_size, write_size;
int errno;
FILE *text;
char *pBuf,*filename;
char a[50];
char PATH_MAX;
char Fullfilename[PATH_MAX];
FILE *fp;
printf("Enter Filename:\n");
fgets(Fullfilename, PATH_MAX, fp); //Read filename from user
CleanInput(Fullfilename); //Remove \n and close string

//Build a full filename with path

char Filename[PATH_MAX] = "/home/sosdt009/Desktop";
strcat( Fullfilename,Filename);

//Open file with fully qualified name and read the first line

fp=fopen(Fullfilename, "r");
char filename2[PATH_MAX];
fgets(filename2,PATH_MAX-1, fp);
fclose(fp);
CleanInput(Filename); //Remove \n and close string

//Print filename2, then open and read file2

printf("Filename2: %s \n", filename2);
fgets(filename2, PATH_MAX-1, fp);
CleanInput(Filename); //Remove \n and close string
text = fopen(filename2, "w");

venkat28vk 9-Jun-15 4:57am

Frank the reason for the error is i cant assign a file path to a character it has to be assigned to a file pointer and using fopen with specified mode.

Frankie-C 9-Jun-15 5:27am

A file path is a string, and you can assign to whatever is a character array. The problem is that the compiler refuses to init a char array with a string constant. Modify this way:

//Build a full filename with path
char Filename[PATH_MAX];
strcpy(filename, "/home/sosdt009/Desktop");
strcat( Fullfilename,Filename);

venkat28vk 9-Jun-15 7:36am

I am getting error, once the code is compiled.

Enter Filename:
Segmentation fault (core dumped)

Frankie-C 9-Jun-15 8:22am

What a fantasy! What was supposed to do this piece of code?
char MAX_PATH;
for(i=0;i<=(MAX_PATH);i++)

The correct code is the following:
void CleanInput(char *p)
{
int i;
for (i = 0; i < PATH_MAX; i++)
{
if (!p[i] || p[i] == '\n')
{
p[i] = '\0';
break;
}
}
}

venkat28vk 9-Jun-15 8:37am

void CleanInput(char *p)
{
int i;
char PATH_MAX;
for (i = 0; i < PATH_MAX; i++)
{
if (!p[i] || p[i] == '\n')
{
p[i] = '\0';
break;
}
}
}

int receive_text(int new_socket)
{
long int buffersize = 0, recv_size = 0, size = 0, read_size, write_size;
int errno;
FILE *text;
char *pBuf,*filename;
char a[50];
char PATH_MAX;
char Fullfilename[PATH_MAX];
FILE *fp;
printf("Enter Filename: %s \n",filename);
fgets(filename, PATH_MAX, fp); //Read filename from user
CleanInput(filename); //Remove \n and close string

//Build a full filename with path

char Filename[PATH_MAX];
strcpy(filename, "/home/sosdt009/Desktop/received.txt,r");
strcat( Fullfilename,Filename);

//Open file with fully qualified name and read the first line

fp=fopen(Fullfilename, "r");
char filename2[PATH_MAX];
fgets(filename2,PATH_MAX-1, fp);
fclose(fp);
CleanInput(Filename); //Remove \n and close string

//Print filename2, then open and read file2

printf("Filename2: %s \n", filename2);
fgets(filename2, PATH_MAX-1, fp);
CleanInput(Filename); //Remove \n and close string
text = fopen(filename2, "w");
if (text == NULL)
{
puts("Error has occurred. Text file could not be opened \n");
fgets(filename2, PATH_MAX-1, fp);
return -1;
}

//Loop while we have not received the entire file yet

while (1)
{

ioctl(new_socket, FIONREAD, &buffersize);//We check to see if there is data to be read from the socket
printf("Buffersize ioctl value is: %ld \n",buffersize);
fgets(filename, PATH_MAX, fp);
if (buffersize > 0)
{
printf("Buffersize value is: %ld \n", buffersize);
fgets(filename, PATH_MAX, fp);
pBuf = malloc(buffersize);
if (!pBuf)
{
fprintf(stderr, "Memory Error. Cannot allocate!\n");
fgets(filename, PATH_MAX, fp);
exit(-1);
}
read_size = recv(new_socket, pBuf, buffersize, 0);
printf("Read size value is: %li \n", read_size);
fgets(filename, PATH_MAX, fp);
if (read_size < 1)
{
printf("%s", strerror(errno));
fgets(filename, PATH_MAX, fp);
goto free;
}

//Write the currently read data into our text file

write_size = fwrite(pBuf, 1, read_size, text);
free(pBuf);
printf("Writesize value is: %li \n", write_size);
fgets(filename, PATH_MAX, fp);

//Increment the total number of bytes read

recv_size += read_size;
printf("Receivedsize value is: %li \n", recv_size);
fgets(filename, PATH_MAX, fp);
}
if((buffersize == 0) && (recv_size != 0))
{
goto free;
}
}
free:

close(new_socket);
fclose(text);
printf("Text successfully received: \n");
fgets(filename, PATH_MAX, fp);
return 0;

}

this is the entire source code, and when android is sending some data the connection is opened and after that enter file name and segmentation fault error is shown.

Frankie-C 9-Jun-15 8:53am

#ifndef PATH_MAX
#define PATH_MAX 4096 /* # chars in a path name including nul */
#endif

void CleanInput(char *p)
{
int i;
for (i = 0; i < PATH_MAX; i++)
{
if (!p[i] || p[i] == '\n')
{
p[i] = '\0';
break;
}
}
}

int receive_text(int new_socket)
{
long int buffersize = 0, recv_size = 0, size = 0, read_size, write_size;
int errno;
FILE *text;
char *pBuf, *filename;
char a[50];
char Fullfilename[PATH_MAX];
FILE *fp;
printf("Enter Filename: %s \n", filename);
fgets(filename, PATH_MAX, fp); //Read filename from user
CleanInput(filename); //Remove \n and close string

//Build a full filename with path

char Filename[PATH_MAX];
strcpy(filename, "/home/sosdt009/Desktop/received.txt,r");
strcat(Fullfilename, Filename);

//Open file with fully qualified name and read the first line

fp = fopen(Fullfilename, "r");
char filename2[PATH_MAX];
fgets(filename2, PATH_MAX - 1, fp);
fclose(fp);
CleanInput(Filename); //Remove \n and close string

//Print filename2, then open and read file2

printf("Filename2: %s \n", filename2);
fgets(filename2, PATH_MAX - 1, fp);
CleanInput(Filename); //Remove \n and close string
text = fopen(filename2, "w");
if (text == NULL)
{
puts("Error has occurred. Text file could not be opened \n");
fgets(filename2, PATH_MAX - 1, fp);
return -1;
}

//Loop while we have not received the entire file yet

while (1)
{

ioctl(new_socket, FIONREAD, &buffersize); //We check to see if there is data to be read from the socket
printf("Buffersize ioctl value is: %ld \n", buffersize);
fgets(filename, PATH_MAX, fp);
if (buffersize > 0)
{
printf("Buffersize value is: %ld \n", buffersize);
fgets(filename, PATH_MAX, fp);
pBuf = malloc(buffersize);
if (!pBuf)
{
fprintf(stderr, "Memory Error. Cannot allocate!\n");
fgets(filename, PATH_MAX, fp);
exit(-1);
}
read_size = recv(new_socket, pBuf, buffersize, 0);
printf("Read size value is: %li \n", read_size);
fgets(filename, PATH_MAX, fp);
if (read_size < 1)
{
printf("%s", strerror(errno));
fgets(filename, PATH_MAX, fp);
goto free;
}

//Write the currently read data into our text file

write_size = fwrite(pBuf, 1, read_size, text);
free(pBuf);
printf("Writesize value is: %li \n", write_size);
fgets(filename, PATH_MAX, fp);

//Increment the total number of bytes read

recv_size += read_size;
printf("Receivedsize value is: %li \n", recv_size);
fgets(filename, PATH_MAX, fp);
}
if ((buffersize == 0) && (recv_size != 0))
{
goto free;
}
}
free:

close(new_socket);
fclose(text);
printf("Text successfully received: \n");
getchar();
return 0;

}

venkat28vk 10-Jun-15 0:29am

Hi Frank, still i am getting the same error as segmentation fault(core dumped)

Frankie-C 10-Jun-15 2:55am

Sorry I don't know.
You have to debug it

venkat28vk 10-Jun-15 4:41am

ok. Thanks a lot for helping me, through the way.