AVAssetWriter および AVAssetWriterInput アプローチを介して複数の動画を 1 つに連結しようとする場合。3 番目のビデオの後、AVAssetWriter.error から「エンコードできません」というエラーが表示されます。
さらに、コンソールを介してバッファへの読み取りが成功したことを確認できますが、最後に正常に読み取られたビデオのみが連結されたmovに巻き上げられます。いずれかまたは両方の問題についての洞察を歓迎します。ソースとログを以下に示します。ありがとう
+(void)doWriteWithVideoWriter:(AVAssetWriter *)videoWriter withIndex:(int)index withWriterInputArray:(NSMutableArray *)writersArray withInstance:(VideoCombinerManager *)theInstance{
if ([writersArray count] > 0)
{
int newIndex = index+1;
NSError *readerError;
NSDictionary *videoOptions = [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange] forKey:(id)kCVPixelBufferPixelFormatTypeKey];
AVAsset *sourceAsset = [theInstance.loadedAssetsForCompilationDictionary objectForKey:[theInstance.sortedKeysArray objectAtIndex:index]];
AVAssetTrack *videoTrack = [[sourceAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
AVAssetReaderTrackOutput *currentReaderTrackOutput = [[AVAssetReaderTrackOutput alloc] initWithTrack:videoTrack outputSettings:videoOptions];
AVAssetReader *currentReader = [[AVAssetReader alloc] initWithAsset:sourceAsset error:&readerError];
[currentReader addOutput:currentReaderTrackOutput];
[currentReader startReading];
AVAssetWriterInput *writerInput = [[writersArray objectAtIndex:0] retain];
dispatch_queue_t _processingQueue = dispatch_queue_create("asdf", NULL);
[writerInput requestMediaDataWhenReadyOnQueue:_processingQueue usingBlock:^{
if ([writerInput isReadyForMoreMediaData])
{
CMSampleBufferRef nextSampleBuffer;
if ([currentReader status] == AVAssetReaderStatusReading &&
(nextSampleBuffer = [currentReaderTrackOutput copyNextSampleBuffer])) {
if (nextSampleBuffer)
{
BOOL result = [writerInput appendSampleBuffer:nextSampleBuffer];
if (!result)
{
NSLog(@"videoWriter.error.userInfo: %@", videoWriter.error.userInfo);
}
CFRelease(nextSampleBuffer);
}
}
else
{
NSLog(@"writer done: %d", index);
dispatch_release(_processingQueue);
[writersArray removeObjectAtIndex:0];
[writerInput markAsFinished];
[writerInput release];
[currentReader release];
[currentReaderTrackOutput release];
[VideoCombinerManager doWriteWithVideoWriter:videoWriter withIndex:newIndex withWriterInputArray:writersArray withInstance:theInstance];
}
}
}];
}
else
[videoWriter finishWriting];
}
ライター完了: 0
ライター完了: 1
ライター完了: 2
videoWriter.error.userInfo: {
NSLocalizedDescription = "Cannot Encode";
NSLocalizedFailureReason = "The encoder required for this media is busy.";
NSLocalizedRecoverySuggestion = "Stop any other actions that encode media and try again.";
NSUnderlyingError = "Error Domain=NSOSStatusErrorDomain Code=-12915 \"The operation couldn\U2019t be completed. (OSStatus error -12915.)\"";
}
videoWriter.error.userInfo: {
NSLocalizedDescription = "Cannot Encode";
NSLocalizedFailureReason = "The encoder required for this media is busy.";
NSLocalizedRecoverySuggestion = "Stop any other actions that encode media and try again.";
NSUnderlyingError = "Error Domain=NSOSStatusErrorDomain Code=-12915 \"The operation couldn\U2019t be completed. (OSStatus error -12915.)\"";
}