php - Must i any pre encode binary data to send it as base64 on ios? -

i send server video (. mov) devide file chunks. every chunk encode base64 , send in http post. php-server decode base64 string standard decoder. size of chunk before send more big, decoded on server. question: must additionally somehow encode binary data before encode base64?

there code:

// ...  nsfilehandle* file = [nsfilehandle filehandleforreadingatpath:path]; if( file ) {      [file seektofileoffset:[[xdrutils tonumber:[obj valueforkey:@"offset"]] longlongvalue]];       nsdata* data = [file readdataoflength:xkchuncksize];       [file closefile];         nsstring* base64 = [data tobase64string];         [post setobject: base64 forkey: @"record_segment_content"];  }  // send server // ...  // category base64 en @implementation nsdata (xdrbase64)  -(nsstring*)tobase64string {     nsstring *string;      if ([self respondstoselector:@selector(base64encodedstringwithoptions:)])     {         string = [self base64encodedstringwithoptions:kniloptions];  // ios 7+     }     else     {         string = [self base64encoding];                              // pre ios7     }      return string; }  // ...  @end 

update:

problem solved. on php-server replace space character '+' in base64-string before decode.