- The most accurate translation of ISO/IEC 14496-12 specification into C++, based on unique declarative bitstream processing technics;
- Totally use-case agnostic. Provides pure bitstream parsing/composing abilities without superfluous functionality;
- Properly layered and hidden bitstream processing complexity allows to focus on use-case specifics at very high-level without sacrificing access to the low-level bitstream data;
- Asynchronous, event-driven design with focus to process network streams not just files off the drive;
- Fine-grained control over parsing process;
- Leverages zero-copy technics and ultrasmart-pointers to process only required/requested bits of data what gives a huge performance boost when processing Big Endian format on Little Endian machines;
- Doesn't allocate heap memory during bitstream processing;
- Zero level of debug overhead when processing bitstream in production mode;
- Builtin capabilities to debug processed stream in development mode;
- Relies only on pure C++ and C++ Standard Library.
All that leads to bitstream processing with extremely high-performance, low latency, small footprint and speed close to the transferring speed of data between volume (network or drive) and memory;
It's not a full featured media stream processing solution which does profiling or repackaging. Nevertheless, it's very easy to build such solutions based on MPEG-ISOBASE library. For example: https://github.com/DicomJ/mpeg-profiler https://github.com/DicomJ/mpeg-packager
The code is mostly based on very generic C++ and some trivial C++11 features with a few places which incorporate C++17. Consequently it requires modern C++ compiler. For instance:
- GCC >=7.1.0
- Clang >= 8.0
If you would like to check out and build MPEG-ISOBASE library, the procedure is as follows:
-
Consider setting up appropriate compiler with support of C++17 standard, if it's not installed as default one: (optional)
export CXX=/opt/gcc-7.1/bin/g++ # for example
-
Check out MPEG-ISOBASE
git clone [email protected]:DicomJ/mpeg-isobase.git mpeg-isobase
-
Build MPEG-ISOBASE
mkdir mpeg-isobase/build cd mpeg-isobase/build cmake -DCMAKE_BUILD_TYPE=Release -DCXX_STD=c++17 -DCMAKE_INSTALL_PREFIX=$(pwd)/install $(pwd)/../../mpeg-isobase make install
// TBD
-
Checkout an example:
At first the
Streamobject is created for the "sample.mp4" file. Thenisobase::Parserobject is instanciated by thatStreamobject and anObserverobject. At the last line theparse.parse()method is called which traverses all the boxes off theStream, parses all known ones and yields them viaObserverobject in form of events. TheObserverobject in the current example handles just a single 'ftyp' box.cat ../../mpeg-isobase/demo/ftyp.cc
struct: bitstream::Parser::Observer { virtual void event(const bitstream::Parser::Event::Header &event) { auto box = dynamic_cast<const mpeg::isobase::FileTypeBox *>(&event.header); if (box != nullptr) { assert(box->type() == 'ftyp'); std::cout << "Found 'ftyp' box of " << box->size() << " bytes size." << std::endl; } } } observer; bitstream::input::file::Stream stream("sample.mp4"); mpeg::isobase::Parser parser(stream, observer); parser.parse();
-
Consider setting up right path to the stdlib if it's not installed in the system by default: (optional)
export LD_LIBRARY_PATH=/opt/gcc-7.1/lib64 # for example
-
Build and run it:
it's assumed that the current working directory is still
mpeg-isobase/buildg++ \ -o ftyp \ -std=c++17 -Wno-multichar \ -I install/include \ -Wl,-rpath,$(pwd)/install/lib64 install/lib64/*.so \ ../../mpeg-isobase/demo/ftyp.cc time ./ftyp sample.mp4Found 'ftyp' box of 28 bytes size. real 0m0.007s user 0m0.003s sys 0m0.003s
Parser::parse method yields just a few parsing events defined by the Observer's interface.
struct Parser::Observer {
virtual void event(const Event::Header &) {}
virtual void event(const Event::Payload::Boundary::Begin &) {}
virtual void event(const Event::Payload::Data &) {}
virtual void event(const Event::Payload::Boundary::End &) {}
virtual void event(const Event::Exception &) {}
};
It might look like Parser::parse method and Observer interface with a such short list of methods is not enough. So let's instantiate Parser object with an Observer instance (bitstream::output::print::to_stdout) which prints all the events into stdout.
-
Checkout an example:
cat ../../mpeg-isobase/demo/dump.cc
bitstream::input::file::Stream stream("sample.mp4"); mpeg::isobase::Parser parser(stream, bitstream::output::print::to_stdout); parser.parse();
-
Build and run it:
g++ \ -o dump \ -std=c++17 -Wno-multichar \ -I install/include \ -Wl,-rpath,$(pwd)/install/lib64 install/lib64/*.so \ ../../mpeg-isobase/demo/dump.cc time ./dump sample.mp4 -
Check out the output
+- FileTypeBox { // [28 bytes] @0 | uint32 size : 28 | uint32 type : ftyp | uint32 major_brand : mp42 | uint32 minor_version : 0 | uint32[3] compatible_brands : [mp42, isom, avc1] | } +- FreeSpaceBox('free') { // [8 bytes] @28 | uint32 size : 132 | uint32 type : free | } | | <Payload>[124 bytes] +- MediaDataBox { // [8 bytes] @160 | uint32 size : 379880 | uint32 type : mdat | } | | <Payload>[379872 bytes] +- MovieBox { // [8 bytes] @380040 | uint32 size : 3459 | uint32 type : moov | } | +- MovieHeaderBox { // [108 bytes] @380048 | | uint32 size : 108 | | uint32 type : mvhd | | uint8 version : 0 | | uint24 flags : 0 | | uint32 creation_time : Sat Mar 20 21:29:11 2010 | | uint32 modification_time : Sat Mar 20 21:29:12 2010 | | uint32 timescale : 90000 | | uint32 duration : 501120 | | int32 rate : 1 | | int16 volume : 1 | | uint16 reserved : 0 | | uint32[2] reserved : [0, 0] | | int32[9] matrix : [65536, 0, 0, 0, 65536, 0, 0, 0, 1073741824] | | uint32[6] pre_defined : [0, 0, 0, 0, 0, 0] | | uint32 next_track_ID : 3 | | } | +- <undeclared>::Box('iods') { // [8 bytes] @380156 | | uint32 size : 24 | | uint32 type : iods | | } | | | <Payload>[16 bytes] | +- TrackBox { // [8 bytes] @380180 | | uint32 size : 1546 | | uint32 type : trak | | } | | +- TrackHeaderBox { // [92 bytes] @380188 | | | uint32 size : 92 | | | uint32 type : tkhd | | | uint8 version : 0 | | | uint24 flags : 1 | | | uint32 creation_time : Sat Mar 20 21:29:11 2010 | | | uint32 modification_time : Sat Mar 20 21:29:12 2010 | | | uint32 track_ID : 1 | | | uint32 reserved : 0 | | | uint32 duration : 498000 | | | uint32[2] reserved : [0, 0] | | | int16 layer : 0 | | | int16 alternate_group : 0 | | | int16 volume : 0 | | | uint16 reserved : 0 | | | int32[9] matrix : [65536, 0, 0, 0, 65536, 0, 0, 0, 1073741824] | | | uint32 width : 560 | | | uint32 height : 320 | | | } | | +- MediaBox { // [8 bytes] @380280 | | | uint32 size : 1446 | | | uint32 type : mdia | | | } | | | +- MediaHeaderBox { // [32 bytes] @380288 | | | | uint32 size : 32 | | | | uint32 type : mdhd | | | | uint8 version : 0 | | | | uint24 flags : 0 | | | | uint32 creation_time : Sat Mar 20 21:29:11 2010 | | | | uint32 modification_time : Sat Mar 20 21:29:12 2010 | | | | uint32 timescale : 90000 | | | | uint32 duration : 498000 | | | | uint1 pad : 0 | | | | uint5[3] language : und (Undetermined) | | | | uint16 pre_defined : 0 | | | | } | | | +- HandlerBox { // [21 bytes] @380320 | | | | uint32 size : 33 | | | | uint32 type : hdlr | | | | uint8 version : 0 | | | | uint24 flags : 0 | | | | uint32 pre_defined : 0 | | | | uint32 handler_type : vide | | | | uint32[3] reserved : [0, 0, 0] | | | | string name : "vide?" | | | | } | | | | | <Payload>[12 bytes] | | | +- MediaInformationBox { // [8 bytes] @380353 | | | | uint32 size : 1373 | | | | uint32 type : minf | | | | } | | | | +- VideoMediaHeaderBox { // [20 bytes] @380361 | | | | | uint32 size : 20 | | | | | uint32 type : vmhd | | | | | uint8 version : 0 | | | | | uint24 flags : 1 | | | | | uint16 graphicsmode : 0 | | | | | uint16[3] opcolor : [0, 0, 0] | | | | | } | | | | +- DataInformationBox { // [8 bytes] @380381 | | | | | uint32 size : 36 | | | | | uint32 type : dinf | | | | | } | | | | | +- DataReferenceBox { // [16 bytes] @380389 | | | | | | uint32 size : 28 | | | | | | uint32 type : dref | | | | | | uint8 version : 0 | | | | | | uint24 flags : 0 | | | | | | uint32 entry_count : 1 | | | | | | } | | | | | | +- DataEntryUrlBox { // [12 bytes] @380405 | | | | | | | uint32 size : 12 | | | | | | | uint32 type : url | | | | | | | uint8 version : 0 | | | | | | | uint24 flags : 1 | | | | | | | string location : "" | | | | | | | } | | | | +- SampleTableBox { // [8 bytes] @380417 | | | | | uint32 size : 1309 | | | | | uint32 type : stbl | | | | | } | | | | | +- SampleDescriptionBox { // [16 bytes] @380425 | | | | | | uint32 size : 171 | | | | | | uint32 type : stsd | | | | | | uint8 version : 0 | | | | | | uint24 flags : 0 | | | | | | uint32 entry_count : 1 | | | | | | } | | | | | | +- VisualSampleEntry { // [86 bytes] @380441 | | | | | | | uint32 size : 155 | | | | | | | uint32 type : avc1 | | | | | | | uint8[6] reserved : [0, 0, 0, 0, 0, 0] | | | | | | | uint16 data_reference_index: 1 | | | | | | | uint16 pre_defined : 0 | | | | | | | uint16 reserved : 0 | | | | | | | uint32[3] pre_defined : [0, 0, 0] | | | | | | | uint16 width : 560 | | | | | | | uint16 height : 320 | | | | | | | uint32 horizresolution : 72 | | | | | | | uint32 vertresolution : 72 | | | | | | | uint32 reserved : 0 | | | | | | | uint16 frame_count : 1 | | | | | | | string compressorname : "JVT/AVC Coding" | | | | | | | uint16 depth : 24 | | | | | | | int16 pre_defined : -1 | | | | | | | } | | | | | | | | <Payload>[69 bytes] | | | | | +- TimeToSampleBox { // [16 bytes] @380596 | | | | | | uint32 size : 24 | | | | | | uint32 type : stts | | | | | | uint8 version : 0 | | | | | | uint24 flags : 0 | | | | | | uint32 entry_count : 1 | | | | | | } | | | | | | +- Entry #0 { // [8 bytes] @380612 | | | | | | | uint32 sample_count : 166 | | | | | | | uint32 sample_delta : 3000 | | | | | | | } | | | | | +- SampleSizeBox { // [20 bytes] @380620 | | | | | | uint32 size : 684 | | | | | | uint32 type : stsz | | | | | | uint8 version : 0 | | | | | | uint24 flags : 0 | | | | | | uint32 sample_size : 0 | | | | | | uint32 sample_count : 166 | | | | | | } | | | | | | +- Entry #0 { // [4 bytes] @380640 | | | | | | | uint32 entry_size : 22055 | | | | | | | } | | | | | | +- Entry #1 { // [4 bytes] @380644 | | | | | | | uint32 entry_size : 2848 | | | | | | | } | | | | | | +- Entry #2 { // [4 bytes] @380648 | | | | | | | uint32 entry_size : 1468 | | | | | | | } | | | | | | +- Entry #3 { // [4 bytes] @380652 | | | | | | | uint32 entry_size : 1506 | | | | | | | } | | | | | | +- Entry #4 { // [4 bytes] @380656 | | | | | | | uint32 entry_size : 1473 | | | | | | | } | | | | | | | | | | | | | | ... | | | | | | | | | | | | | +- Entry #161 { // [4 bytes] @381284 | | | | | | | uint32 entry_size : 994 | | | | | | | } | | | | | | +- Entry #162 { // [4 bytes] @381288 | | | | | | | uint32 entry_size : 1030 | | | | | | | } | | | | | | +- Entry #163 { // [4 bytes] @381292 | | | | | | | uint32 entry_size : 742 | | | | | | | } | | | | | | +- Entry #164 { // [4 bytes] @381296 | | | | | | | uint32 entry_size : 619 | | | | | | | } | | | | | | +- Entry #165 { // [4 bytes] @381300 | | | | | | | uint32 entry_size : 629 | | | | | | | } | | | | | +- SampleToChunkBox { // [16 bytes] @381304 | | | | | | uint32 size : 40 | | | | | | uint32 type : stsc | | | | | | uint8 version : 0 | | | | | | uint24 flags : 0 | | | | | | uint32 entry_count : 2 | | | | | | } | | | | | | +- Entry #0 { // [12 bytes] @381320 | | | | | | | uint32 first_chunk : 1 | | | | | | | uint32 samples_per_chunk : 4 | | | | | | | uint32 sample_description_index: 1 | | | | | | | } | | | | | | +- Entry #1 { // [12 bytes] @381332 | | | | | | | uint32 first_chunk : 42 | | | | | | | uint32 samples_per_chunk : 2 | | | | | | | uint32 sample_description_index: 1 | | | | | | | } | | | | | +- ChunkOffsetBox { // [16 bytes] @381344 | | | | | | uint32 size : 184 | | | | | | uint32 type : stco | | | | | | uint8 version : 0 | | | | | | uint24 flags : 0 | | | | | | uint32 entry_count : 42 | | | | | | } | | | | | | +- Entry #0 { // [4 bytes] @381360 | | | | | | | uint32 chunk_offset : 168 | | | | | | | } | | | | | | +- Entry #1 { // [4 bytes] @381364 | | | | | | | uint32 chunk_offset : 29670 | | | | | | | } | | | | | | +- Entry #2 { // [4 bytes] @381368 | | | | | | | uint32 chunk_offset : 35828 | | | | | | | } | | | | | | +- Entry #3 { // [4 bytes] @381372 | | | | | | | uint32 chunk_offset : 41992 | | | | | | | } | | | | | | +- Entry #4 { // [4 bytes] @381376 | | | | | | | uint32 chunk_offset : 46948 | | | | | | | } | | | | | | | | | | | | | | ... | | | | | | | | | | | | | +- Entry #37 { // [4 bytes] @381508 | | | | | | | uint32 chunk_offset : 350704 | | | | | | | } | | | | | | +- Entry #38 { // [4 bytes] @381512 | | | | | | | uint32 chunk_offset : 359298 | | | | | | | } | | | | | | +- Entry #39 { // [4 bytes] @381516 | | | | | | | uint32 chunk_offset : 365867 | | | | | | | } | | | | | | +- Entry #40 { // [4 bytes] @381520 | | | | | | | uint32 chunk_offset : 373722 | | | | | | | } | | | | | | +- Entry #41 { // [4 bytes] @381524 | | | | | | | uint32 chunk_offset : 378471 | | | | | | | } | | | | | +- SyncSampleBox { // [16 bytes] @381528 | | | | | | uint32 size : 20 | | | | | | uint32 type : stss | | | | | | uint8 version : 0 | | | | | | uint24 flags : 0 | | | | | | uint32 entry_count : 1 | | | | | | } | | | | | | +- Entry #0 { // [4 bytes] @381544 | | | | | | | uint32 sample_number : 1 | | | | | | | } | | | | | +- SampleDependencyTypeBox { // [12 bytes] @381548 | | | | | | uint32 size : 178 | | | | | | uint32 type : sdtp | | | | | | uint8 version : 0 | | | | | | uint24 flags : 0 | | | | | | } | | | | | | +- Entry #0 { // [1 bytes] @381560 | | | | | | | uint2 is_leading : 0 | | | | | | | uint2 sample_depends_on : 0 | | | | | | | uint2 sample_is_depended_on: 1 | | | | | | | uint2 sample_has_redundancy: 0 | | | | | | | } | | | | | | +- Entry #1 { // [1 bytes] @381561 | | | | | | | uint2 is_leading : 1 | | | | | | | uint2 sample_depends_on : 0 | | | | | | | uint2 sample_is_depended_on: 1 | | | | | | | uint2 sample_has_redundancy: 0 | | | | | | | } | | | | | | +- Entry #2 { // [1 bytes] @381562 | | | | | | | uint2 is_leading : 1 | | | | | | | uint2 sample_depends_on : 0 | | | | | | | uint2 sample_is_depended_on: 1 | | | | | | | uint2 sample_has_redundancy: 0 | | | | | | | } | | | | | | +- Entry #3 { // [1 bytes] @381563 | | | | | | | uint2 is_leading : 1 | | | | | | | uint2 sample_depends_on : 0 | | | | | | | uint2 sample_is_depended_on: 1 | | | | | | | uint2 sample_has_redundancy: 0 | | | | | | | } | | | | | | +- Entry #4 { // [1 bytes] @381564 | | | | | | | uint2 is_leading : 1 | | | | | | | uint2 sample_depends_on : 0 | | | | | | | uint2 sample_is_depended_on: 1 | | | | | | | uint2 sample_has_redundancy: 0 | | | | | | | } | | | | | | | | | | | | | | ... | | | | | | | | | | | | | +- Entry #161 { // [1 bytes] @381721 | | | | | | | uint2 is_leading : 1 | | | | | | | uint2 sample_depends_on : 0 | | | | | | | uint2 sample_is_depended_on: 1 | | | | | | | uint2 sample_has_redundancy: 0 | | | | | | | } | | | | | | +- Entry #162 { // [1 bytes] @381722 | | | | | | | uint2 is_leading : 1 | | | | | | | uint2 sample_depends_on : 0 | | | | | | | uint2 sample_is_depended_on: 1 | | | | | | | uint2 sample_has_redundancy: 0 | | | | | | | } | | | | | | +- Entry #163 { // [1 bytes] @381723 | | | | | | | uint2 is_leading : 1 | | | | | | | uint2 sample_depends_on : 0 | | | | | | | uint2 sample_is_depended_on: 1 | | | | | | | uint2 sample_has_redundancy: 0 | | | | | | | } | | | | | | +- Entry #164 { // [1 bytes] @381724 | | | | | | | uint2 is_leading : 1 | | | | | | | uint2 sample_depends_on : 0 | | | | | | | uint2 sample_is_depended_on: 1 | | | | | | | uint2 sample_has_redundancy: 0 | | | | | | | } | | | | | | +- Entry #165 { // [1 bytes] @381725 | | | | | | | uint2 is_leading : 1 | | | | | | | uint2 sample_depends_on : 0 | | | | | | | uint2 sample_is_depended_on: 1 | | | | | | | uint2 sample_has_redundancy: 0 | | | | | | | } | +- TrackBox { // [8 bytes] @381726 | | uint32 size : 1662 | | uint32 type : trak | | } | | +- TrackHeaderBox { // [92 bytes] @381734 | | | uint32 size : 92 | | | uint32 type : tkhd | | | uint8 version : 0 | | | uint24 flags : 3 | | | uint32 creation_time : Sat Mar 20 21:29:11 2010 | | | uint32 modification_time : Sat Mar 20 21:29:12 2010 | | | uint32 track_ID : 2 | | | uint32 reserved : 0 | | | uint32 duration : 501120 | | | uint32[2] reserved : [0, 0] | | | int16 layer : 0 | | | int16 alternate_group : 0 | | | int16 volume : 1 | | | uint16 reserved : 0 | | | int32[9] matrix : [65536, 0, 0, 0, 65536, 0, 0, 0, 1073741824] | | | uint32 width : 0 | | | uint32 height : 0 | | | } | | +- MediaBox { // [8 bytes] @381826 | | | uint32 size : 1540 | | | uint32 type : mdia | | | } | | | +- MediaHeaderBox { // [32 bytes] @381834 | | | | uint32 size : 32 | | | | uint32 type : mdhd | | | | uint8 version : 0 | | | | uint24 flags : 0 | | | | uint32 creation_time : Sat Mar 20 21:29:11 2010 | | | | uint32 modification_time : Sat Mar 20 21:29:12 2010 | | | | uint32 timescale : 48000 | | | | uint32 duration : 267264 | | | | uint1 pad : 0 | | | | uint5[3] language : eng (English) | | | | uint16 pre_defined : 0 | | | | } | | | +- HandlerBox { // [21 bytes] @381866 | | | | uint32 size : 33 | | | | uint32 type : hdlr | | | | uint8 version : 0 | | | | uint24 flags : 0 | | | | uint32 pre_defined : 0 | | | | uint32 handler_type : soun | | | | uint32[3] reserved : [0, 0, 0] | | | | string name : "soun?" | | | | } | | | | | <Payload>[12 bytes] | | | +- MediaInformationBox { // [8 bytes] @381899 | | | | uint32 size : 1467 | | | | uint32 type : minf | | | | } | | | | +- SoundMediaHeaderBox { // [16 bytes] @381907 | | | | | uint32 size : 16 | | | | | uint32 type : smhd | | | | | uint8 version : 0 | | | | | uint24 flags : 0 | | | | | int16 balance : 0 | | | | | uint16 reserved : 0 | | | | | } | | | | +- DataInformationBox { // [8 bytes] @381923 | | | | | uint32 size : 36 | | | | | uint32 type : dinf | | | | | } | | | | | +- DataReferenceBox { // [16 bytes] @381931 | | | | | | uint32 size : 28 | | | | | | uint32 type : dref | | | | | | uint8 version : 0 | | | | | | uint24 flags : 0 | | | | | | uint32 entry_count : 1 | | | | | | } | | | | | | +- DataEntryUrlBox { // [12 bytes] @381947 | | | | | | | uint32 size : 12 | | | | | | | uint32 type : url | | | | | | | uint8 version : 0 | | | | | | | uint24 flags : 1 | | | | | | | string location : "" | | | | | | | } | | | | +- SampleTableBox { // [8 bytes] @381959 | | | | | uint32 size : 1407 | | | | | uint32 type : stbl | | | | | } | | | | | +- SampleDescriptionBox { // [16 bytes] @381967 | | | | | | uint32 size : 103 | | | | | | uint32 type : stsd | | | | | | uint8 version : 0 | | | | | | uint24 flags : 0 | | | | | | uint32 entry_count : 1 | | | | | | } | | | | | | +- AudioSampleEntry { // [36 bytes] @381983 | | | | | | | uint32 size : 87 | | | | | | | uint32 type : mp4a | | | | | | | uint8[6] reserved : [0, 0, 0, 0, 0, 0] | | | | | | | uint16 data_reference_index: 1 | | | | | | | uint32[2] reserved : [0, 0] | | | | | | | uint16 channelcount : 1 | | | | | | | uint16 samplesize : 16 | | | | | | | uint16 pre_defined : 0 | | | | | | | uint16 reserverd : 0 | | | | | | | uint32 samplerate : 48000 | | | | | | | } | | | | | | | | <Payload>[51 bytes] | | | | | +- TimeToSampleBox { // [16 bytes] @382070 | | | | | | uint32 size : 24 | | | | | | uint32 type : stts | | | | | | uint8 version : 0 | | | | | | uint24 flags : 0 | | | | | | uint32 entry_count : 1 | | | | | | } | | | | | | +- Entry #0 { // [8 bytes] @382086 | | | | | | | uint32 sample_count : 261 | | | | | | | uint32 sample_delta : 1024 | | | | | | | } | | | | | +- SampleSizeBox { // [20 bytes] @382094 | | | | | | uint32 size : 1064 | | | | | | uint32 type : stsz | | | | | | uint8 version : 0 | | | | | | uint24 flags : 0 | | | | | | uint32 sample_size : 0 | | | | | | uint32 sample_count : 261 | | | | | | } | | | | | | +- Entry #0 { // [4 bytes] @382114 | | | | | | | uint32 entry_size : 247 | | | | | | | } | | | | | | +- Entry #1 { // [4 bytes] @382118 | | | | | | | uint32 entry_size : 219 | | | | | | | } | | | | | | +- Entry #2 { // [4 bytes] @382122 | | | | | | | uint32 entry_size : 225 | | | | | | | } | | | | | | +- Entry #3 { // [4 bytes] @382126 | | | | | | | uint32 entry_size : 229 | | | | | | | } | | | | | | +- Entry #4 { // [4 bytes] @382130 | | | | | | | uint32 entry_size : 233 | | | | | | | } | | | | | | | | | | | | | | ... | | | | | | | | | | | | | +- Entry #256 { // [4 bytes] @383138 | | | | | | | uint32 entry_size : 222 | | | | | | | } | | | | | | +- Entry #257 { // [4 bytes] @383142 | | | | | | | uint32 entry_size : 203 | | | | | | | } | | | | | | +- Entry #258 { // [4 bytes] @383146 | | | | | | | uint32 entry_size : 205 | | | | | | | } | | | | | | +- Entry #259 { // [4 bytes] @383150 | | | | | | | uint32 entry_size : 212 | | | | | | | } | | | | | | +- Entry #260 { // [4 bytes] @383154 | | | | | | | uint32 entry_size : 109 | | | | | | | } | | | | | +- SampleToChunkBox { // [16 bytes] @383158 | | | | | | uint32 size : 40 | | | | | | uint32 type : stsc | | | | | | uint8 version : 0 | | | | | | uint24 flags : 0 | | | | | | uint32 entry_count : 2 | | | | | | } | | | | | | +- Entry #0 { // [12 bytes] @383174 | | | | | | | uint32 first_chunk : 1 | | | | | | | uint32 samples_per_chunk : 7 | | | | | | | uint32 sample_description_index: 1 | | | | | | | } | | | | | | +- Entry #1 { // [12 bytes] @383186 | | | | | | | uint32 first_chunk : 38 | | | | | | | uint32 samples_per_chunk : 2 | | | | | | | uint32 sample_description_index: 1 | | | | | | | } | | | | | +- ChunkOffsetBox { // [16 bytes] @383198 | | | | | | uint32 size : 168 | | | | | | uint32 type : stco | | | | | | uint8 version : 0 | | | | | | uint24 flags : 0 | | | | | | uint32 entry_count : 38 | | | | | | } | | | | | | +- Entry #0 { // [4 bytes] @383214 | | | | | | | uint32 chunk_offset : 28045 | | | | | | | } | | | | | | +- Entry #1 { // [4 bytes] @383218 | | | | | | | uint32 chunk_offset : 34203 | | | | | | | } | | | | | | +- Entry #2 { // [4 bytes] @383222 | | | | | | | uint32 chunk_offset : 40420 | | | | | | | } | | | | | | +- Entry #3 { // [4 bytes] @383226 | | | | | | | uint32 chunk_offset : 45345 | | | | | | | } | | | | | | +- Entry #4 { // [4 bytes] @383230 | | | | | | | uint32 chunk_offset : 49831 | | | | | | | } | | | | | | | | | | | | | | ... | | | | | | | | | | | | | +- Entry #33 { // [4 bytes] @383346 | | | | | | | uint32 chunk_offset : 357564 | | | | | | | } | | | | | | +- Entry #34 { // [4 bytes] @383350 | | | | | | | uint32 chunk_offset : 364185 | | | | | | | } | | | | | | +- Entry #35 { // [4 bytes] @383354 | | | | | | | uint32 chunk_offset : 372249 | | | | | | | } | | | | | | +- Entry #36 { // [4 bytes] @383358 | | | | | | | uint32 chunk_offset : 377067 | | | | | | | } | | | | | | +- Entry #37 { // [4 bytes] @383362 | | | | | | | uint32 chunk_offset : 379719 | | | | | | | } | | +- UserDataBox { // [8 bytes] @383366 | | | uint32 size : 22 | | | uint32 type : udta | | | } | | | +- <undeclared>::Box('name') { // [8 bytes] @383374 | | | | uint32 size : 14 | | | | uint32 type : name | | | | } | | | | | <Payload>[6 bytes] | +- UserDataBox { // [8 bytes] @383388 | | uint32 size : 111 | | uint32 type : udta | | } | | +- MetaBox { // [12 bytes] @383396 | | | uint32 size : 103 | | | uint32 type : meta | | | uint8 version : 0 | | | uint24 flags : 0 | | | } | | | +- HandlerBox { // [21 bytes] @383408 | | | | uint32 size : 33 | | | | uint32 type : hdlr | | | | uint8 version : 0 | | | | uint24 flags : 0 | | | | uint32 pre_defined : 0 | | | | uint32 handler_type : mdir | | | | uint32[3] reserved : [0, 0, 0] | | | | string name : "mdir?" | | | | } | | | | | <Payload>[12 bytes] | | | +- <undeclared>::Box('ilst') { // [8 bytes] @383441 | | | | uint32 size : 58 | | | | uint32 type : ilst | | | | } | | | | | <Payload>[50 bytes] +- FreeSpaceBox('free') { // [8 bytes] @383499 | uint32 size : 132 | uint32 type : free | } | | <Payload>[124 bytes] real 0m0.012s user 0m0.010s sys 0m0.001s