Little Stream Detector: A New Native Bitstream Analyzer

[eco-by-different]

Hi,

I have been working on a small portable Windows tool called Little Stream Detector, or LSD.

The basic idea is to provide detailed information about encoded video streams, including frame-level QP/DRF statistics, GOP structure, frame types, bitrate profiles and stream metadata.

Users familiar with AVInaptic may recognize the general direction, but LSD is an independent implementation. It performs native container and bitstream analysis and does not rely on FFmpeg, FFprobe or MediaInfo.

Supported video families currently include AVC, HEVC, VP9, AV1 and XviD, with Matroska/WebM, MP4/MOV and AVI container support.

Version 3.0 also includes a simple Current A / Reference B workflow for comparing two completed analyses.

GitHub: https://github.com/eco-by-different/Little-Stream-Detector

SourceForge: https://sourceforge.net/projects/little-stream-detector/

Feedback and unusual test samples are welcome.

[ProWo]

Tested, good work, thank you.

[mansuper]

Hi,

Supported video families currently include AVC, HEVC, VP9, AV1 and XviD, with Matroska/WebM, MP4/MOV and AVI container support.

Version 3.0 also includes a simple Current A / Reference B workflow for comparing two completed analyses.

GitHub: https://github.com/eco-by-different/Little-Stream-Detector-Snake

SourceForge: https://sourceforge.net/projects/little-stream-detector/

Feedback and unusual test samples are welcome.

Nice work. I've used tools like MediaInfo and AVInaptic for investigating video files, and having a lightweight Windows utility focused specifically on stream-level analysis is an interesting approach.

The ability to inspect GOP structure and frame-by-frame QP/DRF information should make it much easier to understand why two encodes with similar average bitrates can look noticeably different. The Current A / Reference B workflow is also a smart addition for comparing completed encodes. I’ll give LSD a try when I have some unusual AVC/HEVC samples to analyze.

[eco-by-different]

Thank you both, I appreciate the feedback. I’m glad the intended use of the native frame-level analysis and A/B comparison came across clearly. If you encounter any unusual or incorrectly parsed streams, especially AVC or HEVC samples, please let me know.

[eco-by-different]

I have added an interactive mouse-hover tooltip to the bitrate graph.
Moving the pointer across the graph now shows the time interval and the corresponding bitrate values for Current A and Reference B.

Example:

Time interval: 17:35 - 17:45
A / B bitrate: 969.779 kbps | 2.344 Mbps


[Attachment 93674 - Click to enlarge]

Please redownload LSD.exe or LSD.ps1 to get the update.

[eco-by-different]

Small update...

Added initial native support for fragmented MP4 sample indexing as an isolated MP4 sub-route using mvex/trex and moof/traf/tfhd/tfdt/trun.
The existing standard MP4 sample-table path remains unchanged.

Please redownload LSD.exe or LSD.ps1 to test the updated version.

Feedback on unusual fragmented MP4 files is welcome.

Thanks!

[eco-by-different]

A small usability improvement has been added to the QP/DRF distribution view.

You can now click the header row to toggle the A/B values between percentages and actual frame counts (% / pcs).

The attached screenshot shows both display modes.


[Attachment 93838 - Click to enlarge]

If you have already downloaded version 3.0, please download it again to get the updated build.

[eco-by-different]

Added native VVC/H.266 analysis using a two-pass Collect / Resolve / Validate / Publish processing model.
Added native VVC vvcC, SPS, PPS, Picture Header, Slice Header, and reference-picture-list traversal.
Added native VVC I/P/B frame accounting and frame-level SliceQPY distribution with complete-picture validation.

If you have already downloaded version 3.0, please download it again to get the updated build.