File avc.c ff_isom_write_avcc()
The implementation is:
--------------
avio_w8(pb, 1); /* version */
avio_w8(pb, sps[1]); /* profile */
avio_w8(pb, sps[2]); /* profile compat */
avio_w8(pb, sps[3]); /* level */
avio_w8(pb, 0xff); /* 6 bits reserved (111111) + 2 bits nal
size length - 1 (11) */
avio_w8(pb, 0xe1); /* 3 bits reserved (111) + 5 bits number of
sps (00001) */
avio_wb16(pb, sps_size);
avio_write(pb, sps, sps_size);
avio_w8(pb, 1); /* number of pps */
avio_wb16(pb, pps_size);
avio_write(pb, pps, pps_size);
--------------
But the spec ISO/IEC 14496-15, 5.3.3.1.2 says:
--------------
aligned(8) class AVCDecoderConfigurationRecord
{
unsigned int(8) configurationVersion = 1;
unsigned int(8) AVCProfileIndication;
unsigned int(8) profile_compatibility;
unsigned int(8) AVCLevelIndication;
bit(6) reserved = ‘111111’b;
unsigned int(2) lengthSizeMinusOne;
bit(3) reserved = ‘111’b;
unsigned int(5) numOfSequenceParameterSets;
for (i = 0; i< numOfSequenceParameterSets; i++)
{
unsigned int(16) sequenceParameterSetLength;
bit(8 * sequenceParameterSetLength) sequenceParameterSetNALUnit;
}
unsigned int(8) numOfPictureParameterSets;
for (i = 0; i< numOfPictureParameterSets; i++)
{
unsigned int(16) pictureParameterSetLength;
bit(8 * pictureParameterSetLength) pictureParameterSetNALUnit;
}
if (profile_idc == 100 || profile_idc == 110 ||
profile_idc == 122 || profile_idc == 144)
{
bit(6) reserved = ‘111111’b;
unsigned int(2) chroma_format;
bit(5) reserved = ‘11111’b;
unsigned int(3) bit_depth_luma_minus8;
bit(5) reserved = ‘11111’b;
unsigned int(3) bit_depth_chroma_minus8;
unsigned int(8) numOfSequenceParameterSetExt;
for (i = 0; i< numOfSequenceParameterSetExt; i++)
{
unsigned int(16) sequenceParameterSetExtLength;
bit(8 * sequenceParameterSetExtLength)
sequenceParameterSetExtNALUnit;
}
}
}
--------------
The part "if (profile_idc == 100) ..." is missing.
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