how to merge video file one by one

Question

Possible Duplicate:
Merge Two Video files in iPhone Application

I have download 40mb video file from server in multiple split(2mb). i'm using NSURLConnection i want to make that 20 split as a single video file. how to do that is there any API in iphone framework can some one explain me with code. here is my connectionDidFinishLoading method

 - (void)connectionDidFinishLoading:(NSURLConnection *)connection {

NSString *fileName = [NSString stringWithFormat:@"%@",
                                      filePath];
[contentData writeToFile:fileName atomically:YES];

}

if i write like this i got only last split file. i mean 2mb data only some one guide me how to do that?

@Abizern There they have used AVAsset, but this user is trying to merge using File handler, so two different scenario — KingofBliss, Sep 10 '12 at 11:55
@KingofBliss Regardless of the method that he's shown here - the solution is in the other SO post. — Abizern, Sep 10 '12 at 12:03
@Abizern i tried file handler. file will download fully but its showing "the movie's file format isn't recognized" — Gurumoorthy Arumugam, Sep 10 '12 at 12:03
I think this may be useful to you http://stackoverflow.com/questions/4002979/downloading-a-large-file-iphone-sdk — HarshIT, Sep 10 '12 at 12:18

KingofBliss · Accepted Answer · 2012-09-10T12:07:06.507

1

Im not sure whether writeToFile works in this scenario,

But to add a file in appending mode use the following code,

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *documentTXTPath = [documentsDirectory stringByAppendingPathComponent:@"Notes.txt"];
NSString *savedString = textview.text;
NSFileHandle *myHandle = [NSFileHandle fileHandleForWritingAtPath:logPath];
[myHandle seekToEndOfFile];
[myHandle writeData:[savedString dataUsingEncoding:NSUTF8StringEncoding]];

Remove the code,

[contentData writeToFile:fileName atomically:YES];

edited Sep 10 '12 at 12:07

answered Sep 10 '12 at 11:54

KingofBliss

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this is not a string file bro – Gurumoorthy Arumugam Sep 10 '12 at 11:58
1

Thats what i mentioned that Im not sure it will work in this scenario for video – KingofBliss Sep 10 '12 at 12:03
My code is for creating a text file in appending mode. – KingofBliss Sep 10 '12 at 12:05

score -1 · Answer 2 · answered Sep 10 '12 at 12:28

- (void) mergeVideos{
///... after getting hold or your assets....firstAsset, secondAsset

AVMutableComposition* mixComposition = [AVMutableComposition composition];

AVMutableCompositionTrack *firstTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo 
                                                                  preferredTracfirst:kCMPersistentTracfirst_Invalid];
[firstTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, firstAsset.duration) 
                    ofTrack:[[firstAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] 
                     atTime:kCMTimeZero error:nil];

AVMutableCompositionTrack *secondTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo 
                                                                   preferredTracfirst:kCMPersistentTracfirst_Invalid];

[secondTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, secondAsset.duration)
                     ofTrack:[[secondAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] 
                      atTime:kCMTimeZero error:nil];    

[secondTrack setPreferredTransform:CGAffineTransformMakeScale(0.25f,0.25f)]; 
}

how to merge video file one by one

2 Answers2