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GstCameraPlugin: fix queue backlog latency and nvh264enc pipeline - #170

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Arda78484 wants to merge 4 commits into
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GstCameraPlugin: fix queue backlog latency and nvh264enc pipeline#170
Arda78484 wants to merge 4 commits into
ArduPilot:mainfrom
ayaztechteam:main

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Add leaky queue limits to prevent frame backlog buildup in all pipelines. Without limits the default 200-frame queue causes hundreds of ms of latency when the encoder cannot keep pace with the camera frame rate.

Add h264parse between nvh264enc and rtph264pay in the generic pipeline to fix caps negotiation that caused the CUDA path to fail silently.

Update nvh264enc to use low-latency-hp preset and set gop-size to match the key-int-max used by the x264enc path.

Tested on Ubuntu 22.04, Gazebo Harmonic, NVIDIA RTX 3050 (driver 550, GStreamer 1.20.3). Both CPU (x264enc) and CUDA (nvh264enc) paths build and run without errors.

Arda78484 added 4 commits June 7, 2026 18:31
Add leaky queue limits to prevent frame backlog buildup in all pipelines.
Without limits the default 200-frame queue causes hundreds of ms of latency
when the encoder cannot keep pace with the camera frame rate.

Add h264parse between nvh264enc and rtph264pay in the generic pipeline to
fix caps negotiation that caused the CUDA path to fail silently.

Update nvh264enc to use low-latency-hp preset and set gop-size to match
the key-int-max used by the x264enc path.
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