Split Motion-JPEG (MJPEG) Stream into JPEG files; for Syma X5SW WiFi FPV Camera. ; also included realtime streaming shell script which is using VLC.

separate.c

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define MAX_FRAME_SIZE 256*1024 // KB
#define CONTENT_LENGTH "Content-Length: "
#define PAYLOAD "\r\n"

int main()
{
    char buf[MAX_FRAME_SIZE];
    //size_t rs = fread(buf, MAX_FRAME_SIZE, 1, stdin);
    // parse content-length
    int length;
    int seq = 0;
    while (1) {
        while( fgets(buf, MAX_FRAME_SIZE, stdin) != NULL )
        {
            char *length_start = strstr(buf,CONTENT_LENGTH);
            if (length_start == NULL) continue;
            char *length_end = strstr(length_start,"\r\n");
            int tmp = *length_end;
            *length_end = 0;
            length_start += strlen(CONTENT_LENGTH);
            *length_end = tmp;
            length = atoi(length_start);
            break;
        }

        while( fgets(buf, MAX_FRAME_SIZE, stdin) != NULL )
        {
            // parse body
            char *payload = strstr(buf,PAYLOAD);
            if (payload != buf) continue; // if not start with "\r\n"
            break;
        }
        if (fread(buf,length,1,stdin) == 0) break;
        fwrite(buf,length,1,stdout);

        char fname[16];
        snprintf(fname,15,"%05d.jpg",seq++);
        FILE *out = fopen(fname,"w");
        fwrite(buf,length,1,out);
        fclose(out);
    }
}

syma.sh

PARSER="$HOME/hgfs/Dropbox/symafpv/a.out"
HOST="http://192.168.1.1:80"
DATE=`date +%F_%T`
mkdir -p $DATE
cd $DATE
ID=`wget -q -O - "$HOST/request_av.cgi?User=admin&pwd=" | grep "var id=" | grep -o -P "[0-9]+"`
wget -q -O - "$HOST/Videostream.cgi?User=admin&pwd=&id=$ID" | $PARSER | vlc /dev/stdin
avconv -framerate 15 -i %05d.jpg -codec copy encoded15.mov
rm *.jpg