Implementation of custom bytetrack demo for real time stream analysis [GSoC'2026] - #4420
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Vishwa2684 wants to merge 11 commits into
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Implementation of custom bytetrack demo for real time stream analysis [GSoC'2026]#4420Vishwa2684 wants to merge 11 commits into
Vishwa2684 wants to merge 11 commits into
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Pull request overview
This PR adds a new MediaPipe ByteTrack demo that integrates OVMS + the existing real-time stream analysis Python client to run object detection + multi-object tracking on RTSP streams. It also updates the MediaPipe build integration and adjusts streaming timestamp handling in the KFS graph executor.
Changes:
- Adds a new
demos/mediapipe/bytetrackdemo (graph, OVMS config, and setup README). - Extends the real-time stream analysis Python demo CLI to pass FFmpeg output dimensions through to
StreamClient. - Updates MediaPipe/Bazel integration (new ByteTrack calculators dependency; changes MediaPipe git_repository source) and adds stricter timestamp monotonicity checks for streaming.
Reviewed changes
Copilot reviewed 7 out of 7 changed files in this pull request and generated 8 comments.
Show a summary per file
| File | Description |
|---|---|
WORKSPACE |
Switches the MediaPipe repository source (currently to a fork/branch). |
third_party/mediapipe_calculators/BUILD |
Adds ByteTrack calculators target to the OVMS MediaPipe calculators aggregation library. |
src/kfs_frontend/kfs_graph_executor_impl.cpp |
Changes timestamp deserialization/defaulting and adds stream-level monotonic timestamp enforcement. |
demos/real_time_stream_analysis/python/client.py |
Adds CLI args for FFmpeg output width/height and forwards them to StreamClient. |
demos/mediapipe/bytetrack/README.md |
Introduces demo setup/run instructions for ByteTrack RTSP streaming demo. |
demos/mediapipe/bytetrack/config.json |
Adds OVMS config for the YOLOX model + ByteTrack MediaPipe graph. |
demos/mediapipe/bytetrack/bytetrack_ovms.pbtxt |
Adds the MediaPipe graph wiring OpenVINO/OVMS inference + ByteTrack tracking + overlay. |
Suppressed comments (1)
src/kfs_frontend/kfs_graph_executor_impl.cpp:1147
- The inline comment "// this method" is not descriptive. Either remove it or replace with a comment that explains what the function does.
// this method
Status createAndPushPacketsImpl(
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| // steady_clock never jumps backward; system_clock can | ||
| auto now = std::chrono::steady_clock::now().time_since_epoch(); | ||
| int64_t candidate = std::chrono::duration_cast<std::chrono::microseconds>(now).count(); | ||
| timestamp = ::mediapipe::Timestamp::CreateNoErrorChecking(candidate); | ||
| } | ||
|
|
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| // Enforce strict monotonicity regardless of source | ||
| if (lastPushedTimestamp != ::mediapipe::Timestamp::Unset() && timestamp <= lastPushedTimestamp) { | ||
| SPDLOG_DEBUG("Non-monotonic timestamp detected: new={} <= last={}; for request to: {}", | ||
| timestamp.DebugString(), lastPushedTimestamp.DebugString(), request.model_name()); | ||
| return Status(StatusCode::MEDIAPIPE_INVALID_TIMESTAMP, "Timestamp did not increase relative to previous packet in stream"); | ||
| } |
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| // this method | ||
| static Status deserializeTimestampIfAvailable( |
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| // Enforce strict monotonicity regardless of source | ||
| if (lastPushedTimestamp != ::mediapipe::Timestamp::Unset() && timestamp <= lastPushedTimestamp) { | ||
| SPDLOG_DEBUG("Non-monotonic timestamp detected: new={} <= last={}; for request to: {}", | ||
| timestamp.DebugString(), lastPushedTimestamp.DebugString(), request.model_name()); | ||
| return Status(StatusCode::MEDIAPIPE_INVALID_TIMESTAMP, "Timestamp did not increase relative to previous packet in stream"); |
dtrawins
reviewed
Aug 11, 2026
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Collaborator
|
make sdl-check is failing with error: |
Author
|
@atobiszei @dtrawins I've written code for custom calculator |
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@dtrawins Why is the ci failing? Could you share the logs? |
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@atobiszei @dtrawins
Summary
This PR adds a ByteTrack Real-Time Stream Analysis demo for OpenVINO Model Server (OVMS).
The demo reuses the MediaPipe ByteTrack graph from
demos/mediapipe/bytetrackwith theyolox_tinymodel and integrates it with thereal_time_stream_analysisPython client. This enables object detection and multi-object tracking on RTSP streams using OVMS.Key Changes
Implementation of custom bytetrack graph [GSoC'26] mediapipe#131
OVYoloXTensorsToDetectionsCalculatorto process YOLOX output tensors from the YOLOX-Tiny model hosted on Hugging Face.Directory Structure
demos/mediapipe/bytetracksrc/bytetracksrc/yoloxWhat's Included
demos/mediapipe/bytetrack.client.pyexample for running inference with: