9
Czy ktoś wie, jak wykryć, że plik wideo jest filmem 3D?Jak wykryć, że film jest 3D?
Próbowałem używać narzędzia ffmpeg, ale nie udało mi się znaleźć sposobu.
A
Odpowiedz
6
To zależy od formatu.
Na poziomie strumienia: W przypadku AVC można wyszukać komunikaty SEI dotyczące rozmieszczenia ramek. Dla MVC możesz szukać NAL-ów dla przedłużenia plasterek (typ = 20).
http://www.merl.com/reports/docs/TR2011-022.pdf
Spojrzałem na pliku. Jest to AVC 3D z ramą typu pakowania 3 (obok siebie - L jest po lewej, R po prawej). Wyodrębniłem strumień H.264 i znalazłem przy przesunięciu bajtu 0x23: 00 00 00 01 06 2D jest to komunikat SEI (06) układu pakowania ramek typu (2D). Rzeczywiście plik zawiera informacje wskazujące 3D
Comannd narzędzie do wykrywania linii 3D
- Extract strumień H.264 przy użyciu mp4box -Surowe 1 82-3D-LHelEIJVxiE.mp4 (http://gpac.wp.mines-telecom.fr/mp4box/)
podjąć elementarny strumień H.264 82-3D-LHelEIJVxiE_track1.h264 i uruchomić go przechadzkę kod followin:
#include <iostream>
#include <fstream>
typedef unsigned char uint8_t;
enum ResultCode
{
E_Error = -1,
E_OK = 0,
E_No3D = 2,
E_Found3D = 3,
};
enum NALType
{
NALType_Unknown = 0,
NALType_Slice = 1,
NALType_Slice_DPA = 2,
NALType_Slice_DPB = 3,
NALType_Slice_DPC = 4,
NALType_Slice_IDR = 5,
NALType_SEI = 6,
NALType_SPS = 7,
NALType_PPS = 8,
NALType_AU_Delimiter = 9,
NALType_SequenceEnd = 10,
NALType_StreamEnd = 11,
NALType_FillerData = 12,
NALType_CodedSliceExtension = 20,
NALType_MAX = 0x1f
};
enum SEIType
{
SEIType_FramePackingArrangement = 0x2D
};
enum StartCodeState
{
StartCodeState_none,
StartCodeState_0,
StartCodeState_0_0,
StartCodeState_0_0_1
};
int Is3D(std::ifstream & inputFile)
{
int nResult = E_OK;
StartCodeState eStartCodeState = StartCodeState_none;
while((E_OK == nResult) && (! inputFile.eof()))
{
uint8_t byte = inputFile.get();
switch(eStartCodeState)
{
case StartCodeState_none :
eStartCodeState = (byte == 0) ? StartCodeState_0 : StartCodeState_none;
break;
case StartCodeState_0 :
eStartCodeState = (byte == 0) ? StartCodeState_0_0 : StartCodeState_none;
break;
case StartCodeState_0_0 :
switch(byte)
{
case 0 : eStartCodeState = StartCodeState_0_0; break;
case 1 : eStartCodeState = StartCodeState_0_0_1; break;
default : eStartCodeState = StartCodeState_none;
}
default:
;
}
if( eStartCodeState == StartCodeState_0_0_1)
{
uint8_t cNALType = inputFile.get();
cNALType &= NALType_MAX;
switch(cNALType)
{
case NALType_CodedSliceExtension :
nResult = E_Found3D;
break;
case NALType_SEI :
{
uint8_t cSEIType = inputFile.get();
if(cSEIType == SEIType_FramePackingArrangement)
{
nResult = E_Found3D;
}
break;
}
default:
;
}
eStartCodeState = StartCodeState_none;
}
}
return nResult;
}
int main(int argc, char * argv[])
{
int nResult = E_OK;
if(argc != 2)
{
nResult = E_Error;
std::cerr << "Usage: "
<< argv[0]
<< " <H.264 elementary stream input file>"
<< std::endl;
}
if(E_OK == nResult)
{
std::ifstream inputFile(argv[1], std::ios::binary);
if(inputFile.is_open())
{
if(E_Found3D == Is3D(inputFile))
{
std::cout << "File: "
<< argv[1]
<< " contains 3D."
<< std::endl;
nResult = E_Found3D;
}
else
{
std::cout << "No 3D found" << std::endl;
nResult = E_No3D;
}
}
else
{
std::cerr << "Error opening input file: "
<< argv[1]
<< std::endl;
nResult = E_Error;
}
}
return nResult;
}
+0
Czy możesz uruchomić mp4box + kawałek mojego kodu? Czy potrzebujesz kodu źródłowego lub plików binarnych? Jaka platforma? –
0
narzędzia Comannd linia wykryć 3D:
- Ekstrakt strumienia h.264 pomocą mp4box -Surowe 1 82-3D-LHelEIJVxiE.mp4 (http://gpac.wp.mines-telecom.fr/mp4box/)
się elementarny strumień H.264 82-3D-LHelEIJVxiE_track1.h264 i uruchom go za pomocą następującego kodu:
#include <iostream>
#include <fstream>
typedef unsigned char uint8_t;
enum ResultCode
{
E_Error = -1,
E_OK = 0,
E_No3D = 2,
E_Found3D = 3,
};
enum NALType
{
NALType_Unknown = 0,
NALType_Slice = 1,
NALType_Slice_DPA = 2,
NALType_Slice_DPB = 3,
NALType_Slice_DPC = 4,
NALType_Slice_IDR = 5,
NALType_SEI = 6,
NALType_SPS = 7,
NALType_PPS = 8,
NALType_AU_Delimiter = 9,
NALType_SequenceEnd = 10,
NALType_StreamEnd = 11,
NALType_FillerData = 12,
NALType_CodedSliceExtension = 20,
NALType_MAX = 0x1f
};
enum SEIType
{
SEIType_FramePackingArrangement = 0x2D
};
enum StartCodeState
{
StartCodeState_none,
StartCodeState_0,
StartCodeState_0_0,
StartCodeState_0_0_1
};
int Is3D(std::ifstream & inputFile)
{
int nResult = E_OK;
StartCodeState eStartCodeState = StartCodeState_none;
while((E_OK == nResult) && (! inputFile.eof()))
{
uint8_t byte = inputFile.get();
switch(eStartCodeState)
{
case StartCodeState_none :
eStartCodeState = (byte == 0) ? StartCodeState_0 : StartCodeState_none;
break;
case StartCodeState_0 :
eStartCodeState = (byte == 0) ? StartCodeState_0_0 : StartCodeState_none;
break;
case StartCodeState_0_0 :
switch(byte)
{
case 0 : eStartCodeState = StartCodeState_0_0; break;
case 1 : eStartCodeState = StartCodeState_0_0_1; break;
default : eStartCodeState = StartCodeState_none;
}
default:
;
}
if( eStartCodeState == StartCodeState_0_0_1)
{
uint8_t cNALType = inputFile.get();
cNALType &= NALType_MAX;
switch(cNALType)
{
case NALType_CodedSliceExtension :
nResult = E_Found3D;
break;
case NALType_SEI :
{
uint8_t cSEIType = inputFile.get();
if(cSEIType == SEIType_FramePackingArrangement)
{
nResult = E_Found3D;
}
break;
}
default:
;
}
eStartCodeState = StartCodeState_none;
}
}
return nResult;
}
int main(int argc, char * argv[])
{
int nResult = E_OK;
if(argc != 2)
{
nResult = E_Error;
std::cerr << "Usage: "
<< argv[0]
<< " <H.264 elementary stream input file>"
<< std::endl;
}
if(E_OK == nResult)
{
std::ifstream inputFile(argv[1], std::ios::binary);
if(inputFile.is_open())
{
if(E_Found3D == Is3D(inputFile))
{
std::cout << "File: "
<< argv[1]
<< " contains 3D."
<< std::endl;
nResult = E_Found3D;
}
else
{
std::cout << "No 3D found" << std::endl;
nResult = E_No3D;
}
}
else
{
std::cerr << "Error opening input file: "
<< argv[1]
<< std::endl;
nResult = E_Error;
}
}
return nResult;
}
Nie wiem, czy to pomaga: Wykryj współczynnik kształtu. Film 3D ma podwójną szerokość, np. 3840 x 1080 – Raptor
Co otrzymasz, gdy uruchomisz 'ffprobe 3dvideo.mp4'? – d33pika