[英]AVAssetWriterInput append fails with error code -11800 AVErrorUnknown -12780
[英]Can't append CMSampleBuffer to AVAssertWriterInput (error -12780)
我正在使用ffmpeg手動解碼h264 RTSP流,並嘗試使用AVAssertWriter
和AVAssertWriterInput
保存未壓縮的幀。
調用AVAssetWriterInput appendBuffer
時出現以下錯誤-
錯誤域= AVFoundationErrorDomain代碼= -11800“操作無法完成” UserInfo = {NSUnderlyingError = 0x170059530 {Error Domain = NSOSStatusErrorDomain Code = -12780“(null)”},NSLocalizedFailureReason =發生未知錯誤(-12780),NSLocalizedDescription =操作無法完成}
CMSampleBuffer
包含BGRA幀,如下所示-
CMSampleBuffer 0x159d12900 retainCount: 1 allocator: 0x1b3aa3bb8
invalid = NO
dataReady = YES
makeDataReadyCallback = 0x0
makeDataReadyRefcon = 0x0
formatDescription = <CMVideoFormatDescription 0x17405bd50 [0x1b3aa3bb8]> {
mediaType:'vide'
mediaSubType:'BGRA'
mediaSpecific: {
codecType: 'BGRA'
dimensions: 720 x 1280
}
extensions: {<CFBasicHash 0x1742652c0 [0x1b3aa3bb8]>{type = immutable dict, count = 4,
entries =>
0 : <CFString 0x1addb17c8 [0x1b3aa3bb8]>{contents = "CVImageBufferYCbCrMatrix"} = <CFString 0x1addb1808 [0x1b3aa3bb8]>{contents = "ITU_R_601_4"}
1 : <CFString 0x1addb1928 [0x1b3aa3bb8]>{contents = "CVImageBufferTransferFunction"} = <CFString 0x1addb17e8 [0x1b3aa3bb8]>{contents = "ITU_R_709_2"}
2 : <CFString 0x1adde3800 [0x1b3aa3bb8]>{contents = "CVBytesPerRow"} = <CFNumber 0xb00000000000b402 [0x1b3aa3bb8]>{value = +2880, type = kCFNumberSInt32Type}
3 : <CFString 0x1adde3880 [0x1b3aa3bb8]>{contents = "Version"} = <CFNumber 0xb000000000000022 [0x1b3aa3bb8]>{value = +2, type = kCFNumberSInt32Type}
}
}
}
sbufToTrackReadiness = 0x0
numSamples = 1
sampleTimingArray[1] = {
{PTS = {3000/90000 = 0.033}, DTS = {INVALID}, duration = {INVALID}},
}
imageBuffer = 0x17413ebe0
我也查看了以下問題和答案,但似乎並不能解釋我遇到的問題(我使用的格式是受支持的像素格式): 為什么AVFoundation不接受我的平面像素緩沖區? iOS設備?
任何幫助將不勝感激!
僅供參考-保存我從iPhone相機獲得的BGRA CMSampleBuffer
它可以正常工作,如果需要,我也可以粘貼示例CMSampleBuffer。
找到問題后,我會自己回答-
CMSampleBuffer
不是由IOSurface
支持的。 我用CVPixelBufferCreateWithBytes
它創造了一個CVPixelBuffer
沒有IOSurface后盾,只要我使用CVPixelBufferCreate
並通過了kCVPixelBufferIOSurfacePropertiesKey鍵入它的工作。
https://developer.apple.com/library/content/qa/qa1781/_index.html包含有關創建IOSurface支持的CVPixelBuffers的所有信息。
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