FFmpegKit iOS / macOS / tvOS API  4.4
MediaInformationJsonParser.m
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1 /*
2  * Copyright (c) 2018-2021 Taner Sener
3  *
4  * This file is part of FFmpegKit.
5  *
6  * FFmpegKit is free software: you can redistribute it and/or modify
7  * it under the terms of the GNU Lesser General Public License as published by
8  * the Free Software Foundation, either version 3 of the License, or
9  * (at your option) any later version.
10  *
11  * FFmpegKit is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public License
17  * along with FFmpegKit. If not, see <http://www.gnu.org/licenses/>.
18  */
19 
21 
22 @implementation MediaInformationJsonParser
23 
24 + (MediaInformation*)from:(NSString*)ffprobeJsonOutput {
25  NSError *error;
26 
27  MediaInformation* mediaInformation = [self from: ffprobeJsonOutput with: error];
28 
29  if (error != nil) {
30  NSLog(@"MediaInformation parsing failed: %@.\n", error);
31  }
32 
33  return mediaInformation;
34 }
35 
36 + (MediaInformation*)from:(NSString*)ffprobeJsonOutput with:(NSError*)error {
37  NSData *jsonData = [ffprobeJsonOutput dataUsingEncoding:NSUTF8StringEncoding];
38  NSDictionary *jsonDictionary = [NSJSONSerialization JSONObjectWithData:jsonData options:kNilOptions error:&error];
39  if (error != nil || jsonDictionary == nil) {
40  return nil;
41  }
42 
43  NSArray* array = [jsonDictionary objectForKey:@"streams"];
44  NSMutableArray *streamArray = [[NSMutableArray alloc] init];
45  for(int i = 0; i<array.count; i++) {
46  NSDictionary *streamDictionary = [array objectAtIndex:i];
47  [streamArray addObject:[[StreamInformation alloc] init: streamDictionary]];
48  }
49 
50  return [[MediaInformation alloc] init:jsonDictionary withStreams:streamArray];
51 }
52 
53 @end
NSArray * streamArray
MediaInformation * from:with:(NSString *ffprobeJsonOutput,[with] NSError *error)