def test_make_text_trak():
creation_time = utils.to_mp4_time(datetime(2019, 9, 15, 0, 0, 0))
modification_time = utils.to_mp4_time(datetime(2019, 9, 16, 0, 0, 0))
samples_sizes = [198297, 127477, 192476]
samples_offset = 10
trak = utils.make_text_trak(creation_time, modification_time, b"bzna_fnames\0",
samples_sizes, samples_offset)
# MOOV.TRAK.MDIA.HDLR
hdlr = trak.boxes[-1].boxes[1]
hdlr.refresh_box_size()
assert hdlr.header.type == b"hdlr"
assert hdlr.header.box_size == 44
assert hdlr.handler_type == b"text"
# TODO: validate the use of the name
assert hdlr.name == b"bzna_fnames\0"
assert bytes(hdlr) == \
pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:32, bytes:4, bits:32, bits:32, bits:32, "
"bytes:12",
44, b"hdlr", 0, b"\x00\x00\x00",
0, b"text", b"\x00" * 4, b"\x00" * 4, b"\x00" * 4,
b"bzna_fnames\0")
# MOOV.TRAK.MDIA.MINF.NMHD
nmhd = trak.boxes[-1].boxes[-1].boxes[0]
nmhd.refresh_box_size()
assert nmhd.header.type == b"nmhd"
assert nmhd.header.box_size == 12
assert nmhd.header.version == 0
assert nmhd.header.flags == b"\x00\x00\x00"
assert bytes(nmhd) == pack("uintbe:32, bytes:4, uintbe:8, bits:24",
12, b"nmhd", 0, b"\x00\x00\x00")
# MOOV.TRAK.MDIA.MINF.STBL.STSD
stsd = trak.boxes[-1].boxes[-1].boxes[-1].boxes[0]
assert stsd.header.type == b"stsd"
assert len(stsd.boxes) == 1
# MOOV.TRAK.MDIA.MINF.STBL.STSD.STXT
stxt = stsd.boxes[0]
stxt.refresh_box_size()
assert stxt.header.type == b"stxt"
assert stxt.header.box_size == 28
assert stxt.data_reference_index == 1
assert stxt.content_encoding == b'\0'
assert stxt.mime_format == b'text/plain\0'
assert len(stxt.boxes) == 0
def test_make_trak_co64_explicit_offset():
creation_time = utils.to_mp4_time(datetime(2019, 9, 15, 0, 0, 0))
modification_time = utils.to_mp4_time(datetime(2019, 9, 16, 0, 0, 0))
samples_sizes = [198297, 127477, 192476]
samples_offsets = [utils.MAX_UINT_32,
utils.MAX_UINT_32 + 300000,
utils.MAX_UINT_32 + 2 * 300000]
trak = utils.make_trak(creation_time, modification_time,
samples_sizes, samples_offsets)
# MOOV.TRAK.MDIA
mdia = trak.boxes[1]
# MOOV.TRAK.MDIA.MINF
minf = mdia.boxes[2]
# MOOV.TRAK.MDIA.MINF.STBL
stbl = minf.boxes[2]
# MOOV.TRAK.MDIA.MINF.STBL.CO64
stco = stbl.boxes[4]
stco.refresh_box_size()
assert stco.header.type == b"co64"
assert stco.header.box_size == 40
assert stco.header.version == 0
assert stco.header.flags == b"\x00\x00\x00"
assert stco.entry_count == 3
assert len(stco.entries) == 3
assert stco.entries[0].chunk_offset == utils.MAX_UINT_32
assert stco.entries[1].chunk_offset == utils.MAX_UINT_32 + 300000
assert stco.entries[2].chunk_offset == utils.MAX_UINT_32 + 2 * 300000
assert bytes(stco) == pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:32, "
"uintbe:64, uintbe:64, uintbe:64",
40, b"co64", 0, b"\x00\x00\x00",
3,
utils.MAX_UINT_32,
utils.MAX_UINT_32 + 300000,
utils.MAX_UINT_32 + 2 * 300000)
def test_make_mvhd():
creation_time = utils.to_mp4_time(datetime(2019, 9, 15, 0, 0, 0))
modification_time = utils.to_mp4_time(datetime(2019, 9, 16, 0, 0, 0))
mvhd = utils.make_mvhd(creation_time, modification_time, 3)
mvhd.refresh_box_size()
assert mvhd.header.type == b"mvhd"
assert mvhd.header.box_size == 120
assert mvhd.header.version == 1
assert mvhd.header.flags == b"\x00\x00\x00"
assert mvhd.creation_time == creation_time
assert mvhd.modification_time == modification_time
assert mvhd.timescale == 20
assert mvhd.duration == 60
assert mvhd.rate == [1, 0]
assert mvhd.volume == [0, 0]
assert mvhd.matrix == [65536, 0, 0, 0, 65536, 0, 0, 0, 1073741824]
assert mvhd.pre_defined == [b"\x00" * 4] * 6
assert mvhd.next_track_id == 1
assert bytes(mvhd) == \
pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:64, uintbe:64, uintbe:32, uintbe:64, "
"uintbe:16, uintbe:16, uintbe:8, uintbe:8, "
"bits:16, bits:32, bits:32, "
"uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, "
"bits:32, bits:32, bits:32, bits:32, bits:32, bits:32, "
"uintbe:32",
120, b"mvhd", 1, b"\x00\x00\x00",
creation_time, modification_time, 20, 60,
1, 0, 0, 0,
b"\x00" * 2, b"\x00" * 4, b"\x00" * 4,
65536, 0, 0, 0, 65536, 0, 0, 0, 1073741824,
b"\x00" * 4, b"\x00" * 4, b"\x00" * 4, b"\x00" * 4, b"\x00" * 4, b"\x00" * 4,
1)
def test_to_mp4_date():
assert utils.to_mp4_time(datetime(2017, 12, 15, 16, 24, 10)) == 3596199850
assert utils.to_mp4_time(datetime(1904, 1, 1, 0, 0)) == 0
def test_make_trak():
creation_time = utils.to_mp4_time(datetime(2019, 9, 15, 0, 0, 0))
modification_time = utils.to_mp4_time(datetime(2019, 9, 16, 0, 0, 0))
samples_sizes = [198297, 127477, 192476]
samples_offset = 10
trak = utils.make_trak(creation_time, modification_time,
samples_sizes, samples_offset)
assert trak.header.type == b"trak"
assert len(trak.boxes) == 2
# MOOV.TRAK.TKHD
tkhd = trak.boxes[0]
assert tkhd.header.type == b"tkhd"
assert tkhd.header.version == 1
assert tkhd.header.flags == b"\x00\x00\x00"
assert tkhd.creation_time == creation_time
assert tkhd.modification_time == modification_time
assert tkhd.track_id == -1
assert tkhd.duration == 60
assert tkhd.layer == 0
assert tkhd.alternate_group == 0
assert tkhd.volume == [0, 0]
assert tkhd.matrix == [65536, 0, 0, 0, 65536, 0, 0, 0, 1073741824]
assert tkhd.width == -1
assert tkhd.height == -1
assert tkhd.is_audio is False
# MOOV.TRAK.MDIA
mdia = trak.boxes[1]
assert mdia.header.type == b"mdia"
assert len(mdia.boxes) == 3
# MOOV.TRAK.MDIA.MDHD
mdhd = mdia.boxes[0]
mdhd.refresh_box_size()
assert mdhd.header.type == b"mdhd"
assert mdhd.header.box_size == 44
assert mdhd.header.version == 1
assert mdhd.header.flags == b"\x00\x00\x00"
assert mdhd.creation_time == creation_time
assert mdhd.modification_time == modification_time
assert mdhd.timescale == 20
assert mdhd.duration == 60
assert mdhd.language == [21, 14, 4]
assert mdhd.pre_defined == 0
assert bytes(mdhd) == \
pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:64, uintbe:64, uintbe:32, uintbe:64, "
"bits:1, uint:5, uint:5, uint:5, "
"bits:16",
44, b"mdhd", 1, b"\x00\x00\x00",
creation_time, modification_time, 20, 60,
0x1, 21, 14, 4,
b"\x00" * 2)
# MOOV.TRAK.MDIA.HDLR
hdlr = mdia.boxes[1]
hdlr.refresh_box_size()
assert hdlr.header.type == b"hdlr"
assert hdlr.header.box_size == 33
assert hdlr.header.version == 0
assert hdlr.header.flags == b"\x00\x00\x00"
assert hdlr.pre_defined == 0
assert hdlr.handler_type == b"____"
# TODO: validate the use of the name
assert hdlr.name == b"\0"
assert bytes(hdlr) == pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:32, bytes:4, "
"bits:32, bits:32, bits:32, "
"bytes:1",
33, b"hdlr", 0, b"\x00\x00\x00",
0, b"____",
b"\x00" * 4, b"\x00" * 4, b"\x00" * 4,
b"\0")
# MOOV.TRAK.MDIA.MINF
minf = mdia.boxes[2]
assert minf.header.type == b"minf"
assert len(minf.boxes) == 3
# MOOV.TRAK.MDIA.MINF._MHD (placeholder)
_mhd = minf.boxes[0]
_mhd.refresh_box_size()
assert _mhd.header.type == b"_mhd"
assert _mhd.header.box_size == 8
assert bytes(_mhd) == pack("uintbe:32, bytes:4", 8, b"_mhd")
# MOOV.TRAK.MDIA.MINF.DINF
dinf = minf.boxes[1]
assert dinf.header.type == b"dinf"
assert len(dinf.boxes) == 1
# MOOV.TRAK.MDIA.MINF.DINF.DREF
dref = dinf.boxes[0]
assert dref.header.type == b"dref"
assert dref.header.version == 0
assert dref.header.flags == b"\x00\x00\x00"
assert dref.entry_count == 1
assert len(dref.boxes) == 1
# MOOV.TRAK.MDIA.MINF.DINF.DREF.URL_
url_ = dref.boxes[0]
url_.refresh_box_size()
assert url_.header.type == b"url "
assert url_.header.box_size == 12
assert url_.header.version == 0
assert url_.header.flags == b"\x00\x00\x01"
assert url_.location is None
assert bytes(url_) == pack("uintbe:32, bytes:4, uintbe:8, bits:24",
12, b"url ", 0, b"\x00\x00\x01")
# MOOV.TRAK.MDIA.MINF.STBL
stbl = minf.boxes[2]
assert stbl.header.type == b"stbl"
assert len(stbl.boxes) == 5
# MOOV.TRAK.MDIA.MINF.STBL.STSD
stsd = stbl.boxes[0]
stsd.refresh_box_size()
assert stsd.header.type == b"stsd"
assert stsd.header.box_size == 16
assert stsd.header.version == 0
assert stsd.header.flags == b"\x00\x00\x00"
assert stsd.entry_count == 0
assert bytes(stsd) == pack("uintbe:32, bytes:4, uintbe:8, bits:24, uintbe:32",
16, b"stsd", 0, b"\x00\x00\x00", 0)
# MOOV.TRAK.MDIA.MINF.STBL.STTS
stts = stbl.boxes[1]
stts.refresh_box_size()
assert stts.header.type == b"stts"
assert stts.header.box_size == 24
assert stts.header.version == 0
assert stts.header.flags == b"\x00\x00\x00"
assert stts.entry_count == 1
assert len(stts.entries) == 1
assert stts.entries[0].sample_count == 3
assert stts.entries[0].sample_delta == 20
assert bytes(stts) == pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:32, uintbe:32, uintbe:32",
24, b"stts", 0, b"\x00\x00\x00",
1, 3, 20)
# MOOV.TRAK.MDIA.MINF.STBL.STSZ
stsz = stbl.boxes[2]
stsz.refresh_box_size()
assert stsz.header.type == b"stsz"
assert stsz.header.box_size == 32
assert stsz.header.version == 0
assert stsz.header.flags == b"\x00\x00\x00"
assert stsz.sample_size == 0
assert stsz.sample_count == 3
assert len(stsz.samples) == 3
assert stsz.samples[0].entry_size == samples_sizes[0]
assert stsz.samples[1].entry_size == samples_sizes[1]
assert stsz.samples[2].entry_size == samples_sizes[2]
assert bytes(stsz) == pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32",
32, b"stsz", 0, b"\x00\x00\x00",
0, 3,
samples_sizes[0], samples_sizes[1], samples_sizes[2])
# MOOV.TRAK.MDIA.MINF.STBL.STSC
stsc = stbl.boxes[3]
stsc.refresh_box_size()
assert stsc.header.type == b"stsc"
assert stsc.header.box_size == 28
assert stsc.header.version == 0
assert stsc.header.flags == b"\x00\x00\x00"
assert stsc.entry_count == 1
assert len(stsc.entries) == 1
assert stsc.entries[0].first_chunk == 1
assert stsc.entries[0].samples_per_chunk == 1
assert stsc.entries[0].sample_description_index == 1
assert bytes(stsc) == pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:32, "
"uintbe:32, uintbe:32, uintbe:32",
28, b"stsc", 0, b"\x00\x00\x00",
1,
1, 1, 1)
# MOOV.TRAK.MDIA.MINF.STBL.STCO
stco = stbl.boxes[4]
stco.refresh_box_size()
assert stco.header.type == b"stco"
assert stco.header.box_size == 28
assert stco.header.version == 0
assert stco.header.flags == b"\x00\x00\x00"
assert stco.entry_count == 3
assert len(stco.entries) == 3
assert stco.entries[0].chunk_offset == samples_offset
assert stco.entries[1].chunk_offset == samples_offset + sum(samples_sizes[0:1])
assert stco.entries[2].chunk_offset == samples_offset + sum(samples_sizes[0:2])
assert bytes(stco) == pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:32, "
"uintbe:32, uintbe:32, uintbe:32",
28, b"stco", 0, b"\x00\x00\x00",
3,
samples_offset,
samples_offset + sum(samples_sizes[0:1]),
samples_offset + sum(samples_sizes[0:2]))
def test_make_vide_trak():
creation_time = utils.to_mp4_time(datetime(2019, 9, 15, 0, 0, 0))
modification_time = utils.to_mp4_time(datetime(2019, 9, 16, 0, 0, 0))
samples_sizes = [198297, 127477, 192476]
samples_offset = 10
trak = utils.make_vide_trak(creation_time, modification_time, b"VideoHandler\0",
samples_sizes, samples_offset)
# MOOV.TRAK.MDIA.HDLR
hdlr = trak.boxes[-1].boxes[1]
hdlr.refresh_box_size()
assert hdlr.header.type == b"hdlr"
assert hdlr.header.box_size == 45
assert hdlr.handler_type == b"vide"
# TODO: validate the use of the name
assert hdlr.name == b"VideoHandler\0"
assert bytes(hdlr) == \
pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:32, bytes:4, bits:32, bits:32, bits:32, "
"bytes:13",
45, b"hdlr", 0, b"\x00\x00\x00",
0, b"vide", b"\x00" * 4, b"\x00" * 4, b"\x00" * 4,
b"VideoHandler\0")
# MOOV.TRAK.MDIA.MINF.VMHD
vmhd = trak.boxes[-1].boxes[-1].boxes[0]
vmhd.refresh_box_size()
assert vmhd.header.type == b"vmhd"
assert vmhd.header.box_size == 20
assert vmhd.header.version == 0
assert vmhd.header.flags == b"\x00\x00\x01"
assert vmhd.graphicsmode == 0
assert vmhd.opcolor == [0, 0, 0]
assert bytes(vmhd) == pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:16, uintbe:16, uintbe:16, uintbe:16",
20, b"vmhd", 0, b"\x00\x00\x01",
0, 0, 0, 0)
# MOOV.TRAK.MDIA.MINF.STBL.STSD
stsd = trak.boxes[-1].boxes[-1].boxes[-1].boxes[0]
assert stsd.header.type == b"stsd"
assert len(stsd.boxes) == 1
# MOOV.TRAK.MDIA.MINF.STBL.STSD.AVC1
avc1 = stsd.boxes[0]
assert avc1.header.type == b"avc1"
assert avc1.data_reference_index == 1
assert avc1.width == -1
assert avc1.height == -1
assert avc1.horizresolution == [72, 0]
assert avc1.vertresolution == [72, 0]
assert avc1.frame_count == 1
assert avc1.compressorname == b'\0' * 32
assert avc1.depth == 24
assert len(avc1.boxes) == 2
# MOOV.TRAK.MDIA.MINF.STBL.STSD.AVC1.AVCC
avcC = avc1.boxes[0]
avcC.refresh_box_size()
assert avcC.header.type == b"avcC"
assert avcC.header.box_size == 53
assert avcC.payload == b'\x01d\x10\x16\xff\xe1\x00\x1bgd\x10\x16\xac\xb8' \
b'\x10\x02\r\xff\x80K\x00N\xb6\xa5\x00\x00\x03\x00' \
b'\x01\x00\x00\x03\x00\x02\x04\x01\x00\x07h\xee\x01' \
b'\x9cL\x84\xc0'
# MOOV.TRAK.MDIA.MINF.STBL.STSD.AVC1.PASP
pasp = avc1.boxes[1]
pasp.refresh_box_size()
assert pasp.header.type == b"pasp"
assert pasp.header.box_size == 16
assert pasp.h_spacing == 1
assert pasp.v_spacing == 1
def test_mp4_small_vid():
creation_time = to_mp4_time(datetime(2019, 9, 15, 0, 0, 0))
modification_time = to_mp4_time(datetime(2019, 9, 16, 0, 0, 0))
# FTYP
ftyp = bx_def.FTYP(BoxHeader())
ftyp.header.type = b"ftyp"
ftyp.major_brand = 1836069937 # b"mp41"
ftyp.minor_version = 0
ftyp.compatible_brands = [1836069937] # b'mp41'
ftyp.refresh_box_size()
assert ftyp.header.type == b"ftyp"
assert ftyp.header.box_size == 20
assert ftyp.major_brand == 1836069937 # b"mp41"
assert ftyp.minor_version == 0
assert ftyp.compatible_brands == [1836069937] # b'mp41'
assert bytes(ftyp) == pack("uintbe:32, bytes:4, "
"bytes:4, uintbe:32, bytes:4",
20, b"ftyp",
b"mp41", 0, b'mp41')
# MDAT
mdat = bx_def.MDAT(BoxHeader())
mdat.header.type = b"mdat"
data = []
with open("tests/data/small_vid_mdat_im0", "rb") as f:
data.append(f.read())
with open("tests/data/small_vid_mdat_im1", "rb") as f:
data.append(f.read())
with open("tests/data/small_vid_mdat_im2", "rb") as f:
data.append(f.read())
mdat.data = b''.join(data)
mdat.refresh_box_size()
assert mdat.header.type == b"mdat"
assert mdat.header.box_size == 518258
# MOOV
moov = bx_def.MOOV(BoxHeader())
moov.header.type = b"moov"
# MOOV.MVHD
mvhd = make_mvhd(creation_time, modification_time, 3)
# == total number of tracks
mvhd.next_track_id = 2
assert mvhd.next_track_id == 2
moov.append(mvhd)
# MOOV.TRAK
offset = ftyp.header.box_size + mdat.header.header_size
sizes = [198297, 127477, 192476]
trak = make_vide_trak(creation_time, modification_time, b"VideoHandler\0",
sizes, offset)
# MOOV.TRAK.TKHD
tkhd = trak.boxes[0]
# "\x00\x00\x01" trak is enabled
# "\x00\x00\x02" trak is used in the presentation
# "\x00\x00\x04" trak is used in the preview
# "\x00\x00\x08" trak size in not in pixel but in aspect ratio
tkhd.header.flags = b"\x00\x00\x03"
tkhd.track_id = 1
# TODO: make sure that this is the canvas size
tkhd.width = [512, 0]
tkhd.height = [512, 0]
tkhd.refresh_box_size()
assert tkhd.header.type == b"tkhd"
assert tkhd.header.box_size == 104
assert tkhd.header.flags == b"\x00\x00\x03"
assert tkhd.track_id == 1
assert tkhd.width == 512
assert tkhd.height == 512
assert bytes(tkhd) == \
pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:64, uintbe:64, uintbe:32, "
"bits:32, "
"uintbe:64, "
"bits:32, bits:32, "
"uintbe:16, uintbe:16, uintbe:8, uintbe:8, "
"bits:16, "
"uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, "
"uintbe:16, uintbe:16, uintbe:16, uintbe:16",
104, b"tkhd", 1, b"\x00\x00\x03",
creation_time, modification_time, 1,
b"\x00" * 4,
60,
b"\x00" * 4, b"\x00" * 4,
0, 0, 0, 0,
b"\x00" * 2,
65536, 0, 0, 0, 65536, 0, 0, 0, 1073741824,
512, 0, 512, 0)
# MOOV.TRAK.MDIA.MDHD
mdhd = trak.boxes[-1].boxes[0]
mdhd.timescale = 20
mdhd.duration = 60
mdhd.refresh_box_size()
assert mdhd.header.type == b"mdhd"
assert mdhd.header.box_size == 44
assert mdhd.timescale == 20
assert mdhd.duration == 60
assert bytes(mdhd) == \
pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:64, uintbe:64, uintbe:32, uintbe:64, "
"bits:1, uint:5, uint:5, uint:5, "
"bits:16",
44, b"mdhd", 1, b"\x00\x00\x00",
creation_time, modification_time, 20, 60,
0x1, 21, 14, 4,
b"\x00" * 2)
# MOOV.TRAK.MDIA.MINF.STBL.STSD
stsd = trak.boxes[-1].boxes[-1].boxes[-1].boxes[0]
assert stsd.header.type == b"stsd"
assert len(stsd.boxes) == 1
# MOOV.TRAK.MDIA.MINF.STBL.STSD.AVC1
avc1 = stsd.boxes[0]
avc1.width = 512
avc1.height = 512
assert avc1.header.type == b"avc1"
assert avc1.width == 512
assert avc1.height == 512
moov.append(trak)
moov.refresh_box_size()
assert mvhd.next_track_id == len(moov.boxes)
assert moov.header.type == b"moov"
assert len(moov.boxes) == 2
mp4_bytes = b''.join([bytes(ftyp), bytes(mdat), bytes(moov)])
with open("tests/data/small_vid.out.mp4", "rb") as f:
assert mp4_bytes == f.read()
def test_mp4_dataset():
creation_time = to_mp4_time(datetime(2019, 9, 15, 0, 0, 0))
modification_time = to_mp4_time(datetime(2019, 9, 16, 0, 0, 0))
# FTYP
ftyp = bx_def.FTYP(BoxHeader())
ftyp.header.type = b"ftyp"
ftyp.major_brand = 1769172845 # b"isom"
ftyp.minor_version = 0
ftyp.compatible_brands = [1652190817, # b"bzna"
1769172845] # b"isom"
ftyp.refresh_box_size()
assert ftyp.header.type == b"ftyp"
assert ftyp.header.box_size == 24
assert ftyp.major_brand == 1769172845 # b"isom"
assert ftyp.minor_version == 0
assert ftyp.compatible_brands == [1652190817, # b"bzna"
1769172845] # b"isom"
assert bytes(ftyp) == pack("uintbe:32, bytes:4, bytes:4, uintbe:32, "
"bytes:8",
24, b"ftyp", b"isom", 0,
b"bznaisom")
# MDAT
mdat = bx_def.MDAT(BoxHeader())
mdat.header.type = b"mdat"
data = []
with open("tests/data/small_vid_mdat_im0", "rb") as f:
data.append(f.read())
with open("tests/data/small_vid_mdat_im1", "rb") as f:
data.append(f.read())
with open("tests/data/small_vid_mdat_im2", "rb") as f:
data.append(f.read())
data.append(b"/path/image_1_name.JPEG")
data.append(b"/path/image_2_name.JPEG")
data.append(b"/path/image_3_name.JPEG")
data.append((0).to_bytes(8, byteorder="little"))
data.append((1).to_bytes(8, byteorder="little"))
data.append((0).to_bytes(8, byteorder="little"))
mdat.data = b''.join(data)
mdat.refresh_box_size()
assert mdat.header.type == b"mdat"
assert mdat.header.box_size == 8 + sum(len(entry) for entry in data)
# MOOV
moov = bx_def.MOOV(BoxHeader())
moov.header.type = b"moov"
# MOOV.MVHD
mvhd = make_mvhd(creation_time, modification_time, 3)
# == total number of tracks
mvhd.next_track_id = 5
assert mvhd.next_track_id == 5
moov.append(mvhd)
# MOOV.TRAK
offset = ftyp.header.box_size + mdat.header.header_size
sizes = [198297, 127477, 192476]
trak = make_vide_trak(creation_time, modification_time, b"VideoHandler\0",
sizes, offset)
# MOOV.TRAK.TKHD
tkhd = trak.boxes[0]
# "\x00\x00\x01" trak is enabled
# "\x00\x00\x02" trak is used in the presentation
# "\x00\x00\x04" trak is used in the preview
# "\x00\x00\x08" trak size in not in pixel but in aspect ratio
tkhd.header.flags = b"\x00\x00\x03"
tkhd.track_id = 1
# TODO: make sure that this is the canvas size
tkhd.width = [512, 0]
tkhd.height = [512, 0]
tkhd.refresh_box_size()
assert tkhd.header.type == b"tkhd"
assert tkhd.header.box_size == 104
assert tkhd.header.flags == b"\x00\x00\x03"
assert tkhd.track_id == 1
assert tkhd.width == 512
assert tkhd.height == 512
assert bytes(tkhd) == \
pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:64, uintbe:64, uintbe:32, "
"bits:32, "
"uintbe:64, "
"bits:32, bits:32, "
"uintbe:16, uintbe:16, uintbe:8, uintbe:8, "
"bits:16, "
"uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, "
"uintbe:16, uintbe:16, uintbe:16, uintbe:16",
104, b"tkhd", 1, b"\x00\x00\x03",
creation_time, modification_time, 1,
b"\x00" * 4,
60,
b"\x00" * 4, b"\x00" * 4,
0, 0, 0, 0,
b"\x00" * 2,
65536, 0, 0, 0, 65536, 0, 0, 0, 1073741824,
512, 0, 512, 0)
# MOOV.TRAK.MDIA.MINF.STBL.STSD.AVC1
avc1 = trak.boxes[-1].boxes[-1].boxes[-1].boxes[0].boxes[0]
avc1.width = 512
avc1.height = 512
assert avc1.header.type == b"avc1"
assert avc1.width == 512
assert avc1.height == 512
moov.append(trak)
# MOOV.TRAK
trak = make_meta_trak(creation_time, modification_time, b"bzna_inputs\0",
sizes, offset)
# MOOV.TRAK.TKHD
tkhd = trak.boxes[0]
# "\x00\x00\x01" trak is enabled
# "\x00\x00\x02" trak is used in the presentation
# "\x00\x00\x04" trak is used in the preview
# "\x00\x00\x08" trak size in not in pixel but in aspect ratio
tkhd.header.flags = b"\x00\x00\x00"
tkhd.track_id = 2
# TODO: make sure that this is the canvas size
tkhd.width = [0, 0]
tkhd.height = [0, 0]
tkhd.refresh_box_size()
assert tkhd.header.type == b"tkhd"
assert tkhd.header.box_size == 104
assert tkhd.header.flags == b"\x00\x00\x00"
assert tkhd.track_id == 2
assert tkhd.width == 0
assert tkhd.height == 0
assert bytes(tkhd) == \
pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:64, uintbe:64, uintbe:32, "
"bits:32, "
"uintbe:64, "
"bits:32, bits:32, "
"uintbe:16, uintbe:16, uintbe:8, uintbe:8, "
"bits:16, "
"uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, "
"uintbe:16, uintbe:16, uintbe:16, uintbe:16",
104, b"tkhd", 1, b"\x00\x00\x00",
creation_time, modification_time, 2,
b"\x00" * 4,
60,
b"\x00" * 4, b"\x00" * 4,
0, 0, 0, 0,
b"\x00" * 2,
65536, 0, 0, 0, 65536, 0, 0, 0, 1073741824,
0, 0, 0, 0)
# MOOV.TRAK.MDIA.MDHD
mdhd = trak.boxes[-1].boxes[0]
mdhd.timescale = 20
mdhd.duration = 60
mdhd.refresh_box_size()
assert mdhd.header.type == b"mdhd"
assert mdhd.header.box_size == 44
assert mdhd.timescale == 20
assert mdhd.duration == 60
assert bytes(mdhd) == \
pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:64, uintbe:64, uintbe:32, uintbe:64, "
"bits:1, uint:5, uint:5, uint:5, "
"bits:16",
44, b"mdhd", 1, b"\x00\x00\x00",
creation_time, modification_time, 20, 60,
0x1, 21, 14, 4,
b"\x00" * 2)
# MOOV.TRAK.MDIA.MINF.STBL.STSD.METT
mett = trak.boxes[-1].boxes[-1].boxes[-1].boxes[0].boxes[0]
mett.mime_format = b'video/h264\0'
mett.refresh_box_size()
assert mett.header.type == b"mett"
assert mett.header.box_size == 28
assert mett.mime_format == b'video/h264\0'
moov.append(trak)
# MOOV.TRAK
offset += sum(sizes)
sizes = [23, 23, 23]
trak = make_text_trak(creation_time, modification_time, b"bzna_fnames\0",
sizes, offset)
# MOOV.TRAK.TKHD
tkhd = trak.boxes[0]
# "\x00\x00\x01" trak is enabled
# "\x00\x00\x02" trak is used in the presentation
# "\x00\x00\x04" trak is used in the preview
# "\x00\x00\x08" trak size in not in pixel but in aspect ratio
tkhd.header.flags = b"\x00\x00\x00"
tkhd.track_id = 3
# TODO: make sure that this is the canvas size
tkhd.width = [0, 0]
tkhd.height = [0, 0]
tkhd.refresh_box_size()
assert tkhd.header.type == b"tkhd"
assert tkhd.header.box_size == 104
assert tkhd.header.flags == b"\x00\x00\x00"
assert tkhd.track_id == 3
assert tkhd.width == 0
assert tkhd.height == 0
assert bytes(tkhd) == \
pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:64, uintbe:64, uintbe:32, "
"bits:32, "
"uintbe:64, "
"bits:32, bits:32, "
"uintbe:16, uintbe:16, uintbe:8, uintbe:8, "
"bits:16, "
"uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, "
"uintbe:16, uintbe:16, uintbe:16, uintbe:16",
104, b"tkhd", 1, b"\x00\x00\x00",
creation_time, modification_time, 3,
b"\x00" * 4,
60,
b"\x00" * 4, b"\x00" * 4,
0, 0, 0, 0,
b"\x00" * 2,
65536, 0, 0, 0, 65536, 0, 0, 0, 1073741824,
0, 0, 0, 0)
# MOOV.TRAK.MDIA.MDHD
mdhd = trak.boxes[-1].boxes[0]
mdhd.timescale = 20
mdhd.duration = 60
mdhd.refresh_box_size()
assert mdhd.header.type == b"mdhd"
assert mdhd.header.box_size == 44
assert mdhd.timescale == 20
assert mdhd.duration == 60
assert bytes(mdhd) == \
pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:64, uintbe:64, uintbe:32, uintbe:64, "
"bits:1, uint:5, uint:5, uint:5, "
"bits:16",
44, b"mdhd", 1, b"\x00\x00\x00",
creation_time, modification_time, 20, 60,
0x1, 21, 14, 4,
b"\x00" * 2)
moov.append(trak)
# MOOV.TRAK
offset += sum(sizes)
sizes = [8, 8, 8]
trak = make_text_trak(creation_time, modification_time, b"bzna_targets\0",
sizes, offset)
# MOOV.TRAK.TKHD
tkhd = trak.boxes[0]
# "\x00\x00\x01" trak is enabled
# "\x00\x00\x02" trak is used in the presentation
# "\x00\x00\x04" trak is used in the preview
# "\x00\x00\x08" trak size in not in pixel but in aspect ratio
tkhd.header.flags = b"\x00\x00\x00"
tkhd.track_id = 4
# TODO: make sure that this is the canvas size
tkhd.width = [0, 0]
tkhd.height = [0, 0]
tkhd.refresh_box_size()
assert tkhd.header.type == b"tkhd"
assert tkhd.header.box_size == 104
assert tkhd.header.flags == b"\x00\x00\x00"
assert tkhd.track_id == 4
assert tkhd.width == 0
assert tkhd.height == 0
assert bytes(tkhd) == \
pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:64, uintbe:64, uintbe:32, "
"bits:32, "
"uintbe:64, "
"bits:32, bits:32, "
"uintbe:16, uintbe:16, uintbe:8, uintbe:8, "
"bits:16, "
"uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32, "
"uintbe:16, uintbe:16, uintbe:16, uintbe:16",
104, b"tkhd", 1, b"\x00\x00\x00",
creation_time, modification_time, 4,
b"\x00" * 4,
60,
b"\x00" * 4, b"\x00" * 4,
0, 0, 0, 0,
b"\x00" * 2,
65536, 0, 0, 0, 65536, 0, 0, 0, 1073741824,
0, 0, 0, 0)
# MOOV.TRAK.MDIA.MDHD
mdhd = trak.boxes[-1].boxes[0]
mdhd.timescale = 20
mdhd.duration = 60
mdhd.refresh_box_size()
assert mdhd.header.type == b"mdhd"
assert mdhd.header.box_size == 44
assert mdhd.timescale == 20
assert mdhd.duration == 60
assert bytes(mdhd) == \
pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:64, uintbe:64, uintbe:32, uintbe:64, "
"bits:1, uint:5, uint:5, uint:5, "
"bits:16",
44, b"mdhd", 1, b"\x00\x00\x00",
creation_time, modification_time, 20, 60,
0x1, 21, 14, 4,
b"\x00" * 2)
moov.append(trak)
moov.refresh_box_size()
assert mvhd.next_track_id == len(moov.boxes)
assert moov.header.type == b"moov"
assert len(moov.boxes) == 5
mp4_bytes = b''.join([bytes(ftyp), bytes(mdat), bytes(moov)])
for box in moov.boxes:
if isinstance(box, bx_def.TRAK):
mdia = box.boxes[1]
else:
continue
# trak.mdia.tkhd.name == b"bzna_inputs\0"
if mdia.boxes[1].name == b"bzna_inputs\0":
pass
# trak.mdia.tkhd.name == b"bzna_names\0"
elif mdia.boxes[1].name == b"bzna_fnames\0":
# trak.mdia.minf.stbl.stsz
stsz = mdia.boxes[2].boxes[2].boxes[2]
# trak.mdia.minf.stbl.stco
stco = mdia.boxes[2].boxes[2].boxes[4]
for i, (sample, entry) in enumerate(zip(stsz.samples, stco.entries)):
sample_end = entry.chunk_offset + sample.entry_size
if i == 0:
assert mp4_bytes[entry.chunk_offset:sample_end] == \
b"/path/image_1_name.JPEG"
elif i == 1:
assert mp4_bytes[entry.chunk_offset:sample_end] == \
b"/path/image_2_name.JPEG"
elif i == 2:
assert mp4_bytes[entry.chunk_offset:sample_end] == \
b"/path/image_3_name.JPEG"
# trak.mdia.tkhd.name == b"bzna_targets\0"
elif mdia.boxes[1].name == b"bzna_targets\0":
# trak.mdia.minf.stbl.stsz
stsz = mdia.boxes[2].boxes[2].boxes[2]
# trak.mdia.minf.stbl.stco
stco = mdia.boxes[2].boxes[2].boxes[4]
for i, (sample, entry) in enumerate(zip(stsz.samples, stco.entries)):
sample_end = entry.chunk_offset + sample.entry_size
if i == 0:
assert mp4_bytes[entry.chunk_offset:sample_end] == \
(0).to_bytes(8, byteorder="little")
elif i == 1:
assert mp4_bytes[entry.chunk_offset:sample_end] == \
(1).to_bytes(8, byteorder="little")
elif i == 2:
assert mp4_bytes[entry.chunk_offset:sample_end] == \
(0).to_bytes(8, byteorder="little")
with open("tests/data/small_dataset.out.mp4", "rb") as f:
assert mp4_bytes == f.read()