mcap-ros1-support
ROS1 support for the Python MCAP library
Decision gist · record as of 2026-08-14
Yes. The package is actively maintained, has no known vulnerabilities, uses a permissive MIT license, and carries low install friction. Install it if you need to work with ROS1 data in MCAP format; skip it if you have no ROS1 integration requirement.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Low friction install with only two runtime dependencies (mcap and pyyaml).
- Package is actively maintained with recent commits and no known vulnerabilities.
License · maintenance · safety
permissive license (permissive) — MIT license permits commercial and private use with minimal restrictions; you may use, modify, and distribute this package freely provided you include the license notice.
last release 2025-12-24 (233 days) · last repo commit 2026-08-13 · 1,041 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 93,709 downloads/mo, #13,369 on PyPI
Alternatives
Verify before relying
pip install mcap-ros1-support
from mcap_ros1.reader import read_ros1_messages
for msg in read_ros1_messages("my_data.mcap"):
print(f"{msg.topic}: {msg.ros_msg}")- Whether ROS1 message definitions must be pre-installed or discoverable on the system for reading to work
- Performance characteristics when handling large MCAP files or high-frequency message streams
What it is and what it does
mcap-ros1-support bridges ROS1 and the MCAP file format by providing Python APIs to read and write ROS1 messages in MCAP files. MCAP is a container format for time-series data, and this package adds the ROS1-specific serialization layer needed to work with ROS1 message types within that container.
The package is built on top of the mcap library and depends on pyyaml for configuration handling. It exposes a reader interface for iterating over ROS1 messages stored in MCAP files and a writer interface for serializing ROS1 messages into new MCAP files. This is useful for robotics workflows where you need to log, replay, or analyze ROS1 sensor and control data in a standardized, language-agnostic format.
Use it for
- Log ROS1 sensor data (camera, lidar, IMU) to MCAP files for offline analysis and replay
- Convert ROS1 bag files or live topics to MCAP format for interoperability with non-ROS tools
- Read and deserialize ROS1 messages from MCAP files in Python for data processing pipelines
- Archive robot telemetry and control messages in a portable, timestamped format
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
The package is actively maintained, has no known vulnerabilities, uses a permissive MIT license, and carries low install friction. Install it if you need to work with ROS1 data in MCAP format; skip it if you have no ROS1 integration requirement.
Install
mcap-ros1-support on PyPI
Before you install
Low friction install with only two runtime dependencies (mcap and pyyaml). Package is actively maintained with recent commits and no known vulnerabilities.
License in practice
MIT license permits commercial and private use with minimal restrictions; you may use, modify, and distribute this package freely provided you include the license notice.
Quickstart
pip install mcap-ros1-support
from mcap_ros1.reader import read_ros1_messages
for msg in read_ros1_messages("my_data.mcap"):
print(f"{msg.topic}: {msg.ros_msg}")Verify before relying
- Whether ROS1 message definitions must be pre-installed or discoverable on the system for reading to work
- Performance characteristics when handling large MCAP files or high-frequency message streams
Package facts
| License | permissive license permissive |
| Python support | Supports the current Python release >=3.7 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 2 packagesmcappyyaml |
| Maintenance | Actively maintained 233 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 93,709 / month, #13,369 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | License :: OSI Approved :: MIT LicenseOperating System :: OS IndependentProgramming Language :: Python :: 3 |
Evidence: mcap_ros1_support-0.7.4-py3-none-any.whl
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See also mcap-ros2-support · mcap · mcap-protobuf-support · rosbags · aiorwlock · foxglove-sdk · pyros-genmsg · edn-format · colcon-ros