//printf("\nflag line 1");
#include<string.h> // for strcat,strcpy,strlen,memicmp,strrev
#include<stdio.h> // for fgets,fopen,fprintf,fclose
#include<stdlib.h> // for atoi,system

char name[128],sf[128],dir[256],fp[128];//sf=subtitle file
int bbh;//bottom band height

void analyzebyffprobe()
{	FILE *fr,*fi;//fr to read g:\\fvh which we will create soon , fi to create batch file
	char cmd[512],vh[4];//vh=video height
	cmd[0]=0;
	strcat(cmd,"ffprobe  \"");
	strcat(cmd,fp);
	strcat(cmd,"\" 1> g:\\fa 2>&1 ");
	fi=fopen("g:\\a.bat","w");
	if(fi==NULL)
		printf("\ncould not open g:\\a.bat to run ffprobe & sed in batch file");
	fputs(cmd,fi);
	cmd[0]=0;
	strcat(cmd,"\nsed  -n \"s/.*\\( [0-9]\\+x\\([0-9]\\+\\)\\).*/\\2/pw g:\\fvh\" g:\\fa ");//fvh=for video height
	fputs(cmd,fi);
	fclose(fi);
	system("g:\\a.bat");
	fr=fopen("g:\\fvh","r");
	if(fr==NULL)
		printf("\ncould not open g:\\fvh to decode height of video");
	fgets(vh,4,fr);
	bbh=600-(atoi(vh));
	printf("\nvideo height is : %d",bbh);
	fclose(fr);
}

int check(char d[128])
{	int len;
	char bkup[128];
	strcpy(bkup,d);
	len=strlen(d);
	if(memicmp((strrev(d)),"trs",3))
	{	printf("\n%s!=trs",d);
		return 0;
	}
	else
	{	printf("\n%d:%s",len,bkup);
		strcpy(sf,bkup);
		return 1;
	}
}

int findsubtitlefile()
{	FILE *fr,*log;//fr=file read,fw=filw
	char fn[128];//fn=file name
	log=fopen("g:\\log","a");
	fr=fopen("g:\\list","r");
	if(fr==NULL)
		printf("\ncould not read g:\\list");
	fprintf(log,"\nwe have to search srt in following \"name-length:file-name\" pairs \n");
	while ( fgets ( fn, 125, fr ) != NULL ) 
	{	fprintf(log,"\n%d:%s",strlen(fn),fn);
		fn[strlen(fn)-1]=0;
		if(check(fn))
		{	printf("\nfound subtitle file");
			return 1;
		}
	}
	fclose(fr);
	fclose(log);
	return 0;
}

void main(int argc,char *argv[])
{	FILE *log,*list;
	int i,j,len;
	char dir[120],command[512],vh[4];
	log=fopen("g:\\log","w");
	if(log==NULL)
		printf ("\nCould not open g:\\log for writing ");
	// fp=full path : copying the full path to log followed by number of words in it
	for(i=1;i<argc;i++)
	{
		strcat(fp,argv[i]);
		strcat(fp," ");
	}
	fp[strlen(fp)-1]=0;
	fprintf(log,"\nfull path=%s\nnumber of words=%d",fp,argc-1);
//copying directory name to 'dir' variable
	len=strlen(fp);
	i=strlen(fp)-1;
	while(fp[i]!='\\')
		i=i-1;
	for(j=0;j<i;j++)
		dir[j]=fp[j];
		dir[j]=0;
	fprintf(log,"\ndirectory is %s",dir);
//copying file name to 'name' variable
	for(j=0,i++;i<len;i++,j++)
		name[j]=fp[i];
		//name[j]=0;
	printf("\nfile name:%s",name);
	fprintf(log,"\nfile name  : %s",name);
//building & executing 'dir' command to output all items in current folder to g:\list
	strcat(command,"ls -1 \"");
	strcat(command,dir);
	strcat(command,"\" > g:\\list");
	system(command);
	fprintf(log,"\nwe have executed : %s",command);
	fclose(log);
	command[0]=0;
//let us find the subtitle file
	if (findsubtitlefile())
	{	//run the file with subtitle
		analyzebyffprobe();
		strcat(command,"k -fs -vf screenshot,expand=0:-");
		vh[0]=(bbh/100)+48;
		vh[1]=(bbh/10)+48;
		vh[2]=(bbh%10)+48;
		vh[3]=0;
		printf("\nwe converted bbh to string : %s actually %c %c %c ",vh,vh[0],vh[1],vh[2]);
		strcat(command,vh);
		strcat(command,":0:0 \"");
		strcat(command,fp);
		strcat(command,"\" -sub ");
		strcat(command,"\"");
		strcat(command,dir);
		strcat(command,"\\");
		strcat(command,sf);
		strcat(command,"\"");
		printf("\nwe will run %s",command);
	}
	else
	{	//run file without subtitle
		strcat(command,"k -fs \"");
		strcat(command,fp);
		strcat(command,"\"");
	}
	system(command);
	printf("\nprogram ends");
	getchar();
}

file name:Absolute Zero.flv
43:Absolute Zero ep01-The Conquest of Cold.srt
found subtitle file
C:\SUMEET\XYPLORER>ffprobe  "I:\video\PRESER~1\serial\absolute zero\Absolute Zer
o.flv" 1> g:\fa 2>&1
FFprobe version SVN-r23607, Copyright (c) 2007-2010 the FFmpeg developers
  built on Jun 15 2010 04:09:35 with gcc 4.4.2
  configuration: --target-os=mingw32 --enable-runtime-cpudetect --enable-avisynt
h --enable-gpl --enable-version3 --enable-bzlib --enable-libgsm --enable-libfaad
 --enable-pthreads --enable-libvorbis --enable-libtheora --enable-libspeex --ena
ble-libmp3lame --enable-libopenjpeg --enable-libxvid --enable-libschroedinger --
enable-libx264 --extra-libs='-lx264 -lpthread' --enable-libopencore_amrwb --enab
le-libopencore_amrnb --enable-librtmp --extra-libs='-lrtmp -lpolarssl -lws2_32 -
lwinmm' --arch=x86 --cross-prefix=i686-mingw32- --cc='ccache i686-mingw32-gcc' -
-enable-memalign-hack
  libavutil     50.19. 0 / 50.19. 0
  libavcodec    52.76. 0 / 52.76. 0
  libavformat   52.68. 0 / 52.68. 0
  libavdevice   52. 2. 0 / 52. 2. 0
  libavfilter    1.20. 0 /  1.20. 0
  libswscale     0.11. 0 /  0.11. 0
Argument '1' provided as input filename, but 'I:\video\PRESER~1\serial\absolute
zero\Absolute Zero.flv' was already specified.

C:\SUMEET\XYPLORER>sed  -n "s/.*\( [0-9]\+x\([0-9]\+\)\).*/\2/pw g:\fvh" g:\fa
SED.EXE: can't read g:\fa: No such file or directory


video height is : 592
we converted bbh to string : 5k2 actually 5 k 2
we will run k -fs -vf screenshot,expand=0:-5k2:0:0 "I:\video\PRESER~1\serial\abs
olute zero\Absolute Zero.flv" -sub "I:\video\PRESER~1\serial\absolute zero\Absol
ute Zero ep01-The Conquest of Cold.srt"
program ends

---a.bat---
ffprobe  "I:\video\PRESER~1\serial\absolute zero\Absolute Zero.flv" 1> g:\fa 2>&1 
sed  -n "s/.*\( [0-9]\+x\([0-9]\+\)\).*/\2/pw g:\fvh" g:\fa 
--fvh-- 0 bytes
---list---
Absolute Zero ep01-The Conquest of Cold.srt
Absolute Zero ep02-The Race for Absolute Zero.srt
Absolute Zero.flv

---log---

full path=I:\video\PRESER~1\serial\absolute zero\Absolute Zero.flv
number of words=3
directory is I:\video\PRESER~1\serial\absolute zero
file name  : Absolute Zero.flv
we have executed : ls -1 "I:\video\PRESER~1\serial\absolute zero" > g:\list

C:\SUMEET\XYPLORER>ffprobe  "I:\video\PRESER~1\serial\absolute zero\Absolute Zer
o.flv" 1> g:\fa 2>&1
FFprobe version SVN-r23607, Copyright (c) 2007-2010 the FFmpeg developers
...
Argument '1' provided as input filename, but 'I:\video\PRESER~1\serial\absolute
zero\Absolute Zero.flv' was already specified.

k -subfont-text-scale 3 -fs -vf screenshot,expand=0:-40:0:0 "video_file" -sub "subtitle_file"

//printf("\nflag line 1"); used while debugging
#include<string.h> // for strcat,strcpy,strlen,memicmp,strrev
#include<stdio.h> // for fgets,fopen,fprintf,fclose
#include<stdlib.h> // for atoi,system
#include<conio.h> //for clrscr
//(3)currently we are using g:\log,list,a.bat files
char name[128],finalsf[128],sf[20][128],fp[128];//sf=subtitle file,name=only video file name
int sfnumber;//number of subtitle files found

int check(char d[128])
{	int len,cr;//cr=compare-result
	char bkup[128];
	len=strlen(d);
	d[len-1]=0;//because last character in string received is \n then 0
	strcpy(bkup,d);
	strrev(d);
	cr = memicmp(d, "trs", 3);
	if (cr==0)
	{	//printf("\n%d:%s is an srt file",len,bkup);
		strcpy(sf[sfnumber],bkup);
		return 1;
	}
	else
	{	//printf("\n%s!=trs",d);
		return 0;
	}
}

int findsubtitlefile()
{	FILE *fr,*log;//fr=read g:\\list.txt,log=write to g:\\log.txt
	char fn[128];//fn=file name
	log=fopen("g:\\log.txt","a");
	if(log==NULL)
		printf ("\nCould not append g:\\log.txt in function findsubtitlefile");
	fr=fopen("g:\\list.txt","r");
	if(fr==NULL)
		printf("\ncould not read g:\\list.txt");
	fprintf(log,"\nwe have to search srt in following \"name-length:file-name\" pairs \n");
	while ( fgets ( fn, 127, fr ) != NULL ) 
	{	fprintf(log,"%d:%s\n",strlen(fn),fn);
		if(check(fn))
		{	fprintf(log,"found subtitle file : %s\n",strrev(fn));
			sfnumber++;
		}
	}
	fclose(fr);
	fclose(log);
	if(sfnumber>0)
		return 1;
	else
		return 0;
}
void letuserdecide()
{	int i;
	printf("\nPLEASE CHOOSE SUBTITLE FILE");
	for(i=0;i<sfnumber;i++)
		printf("\n%d)%s",i+1,sf[i]);
	printf("\nEnter option:");
	scanf("%d",&i);
	strcpy(finalsf,sf[i-1]);
}

void main(int argc,char *argv[])
{	FILE *log,*action;
	int i,j,len;
	char dir[120],command[512];
	clrscr();
	log=fopen("g:\\log.txt","w");
	if(log==NULL)
		printf ("\nCould not open g:\\log.txt for writing ");
	// fp=full path 
	for(i=1;i<argc;i++)
	{
		strcat(fp,argv[i]);
		strcat(fp," ");//here sprintf will not work because we are appending to fp in each loop
	}
	fp[strlen(fp)-1]=0;
	fprintf(log,"full path=%s\nnumber of words=%d",fp,argc-1);
//copying directory name to 'dir' variable
	len=strlen(fp);
	i=strlen(fp)-1;
	while(fp[i]!='\\')
		i=i-1;
	for(j=0;j<i;j++)
		dir[j]=fp[j];
		dir[j]=0;
	fprintf(log,"\ndirectory is %s",dir);
//copying file name to 'name' variable
	for(j=0,i++;i<len;i++,j++)
		name[j]=fp[i];
	//printf("\nfile name:%s",name);
	fprintf(log,"\nfile name  : %s",name);
//executing 'dir' command to output all items in current folder to g:\list.txt
	sprintf(command,"ls -1 \"%s\" > g:\\list.txt",dir);
	system(command);
	fprintf(log,"\nwe have executed : %s",command);
	fclose(log);
	command[0]=0;
//let us find the subtitle file
	if (findsubtitlefile())
	{	//run the file with subtitle
			if(sfnumber>1)
			letuserdecide();
		else
				strcpy(finalsf,sf[0]);
		sprintf(command,"\nk -subfont-text-scale 3 -fs -vf screenshot,expand=0:-40:0:0 \"%s\" -sub \"%s\\%s\"",fp,dir,finalsf);
	}
	else
	{	//run file without subtitle
			sprintf(command,"\nk -fs \"%s\"",fp);
	}
	//printf("\nwe will run %s",command);
	action=fopen("g:\\a.bat","w");
	if(action==NULL)
		printf("\nCould not open g:\\a.bat to write kovensky play command");
	fputs(command,action);
	fclose(action);
	system("cmd /c g:\\a.bat");
	//getchar(); while debugging to read output before exiting
}