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+ "zed_svo_probe_cache_policy": "auto"
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+ },
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+ "overall_elapsed_s": 552.4901363560002
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+ }
sessions/session_20261011_161849_867460/metadata/discovery_report.json ADDED
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1
+ {
2
+ "clock_policy": {
3
+ "auxiliary_timestamps": "ZED/RealSense/device/robot timestamps are preserved but not assumed to share a domain",
4
+ "default_sync_time": "streams/<stream_id>/timestamps.parquet for manifest recordings",
5
+ "old_robot_state_domain": "lcm_utime_or_robot_clock"
6
+ },
7
+ "known_recording_code_findings": {
8
+ "new_record_multi_camera": [
9
+ "ZED sidecar device_timestamp_ns comes from sl.TIME_REFERENCE.IMAGE after grab().",
10
+ "RealSense sidecar device_timestamp_ns comes from color_frame.get_timestamp() ms converted to ns.",
11
+ "host_timestamp_ns is time.time_ns() sampled immediately after recorder.record_frame()."
12
+ ],
13
+ "old_zed_robot_state_recording": [
14
+ "PandaStatus and PandaGripperStatus are stored as ZED SVOData custom keys.",
15
+ "SVOData timestamp is set from payload timestamp_us via set_microseconds().",
16
+ "No independent host receive timestamp is present for old embedded robot states."
17
+ ]
18
+ },
19
+ "legacy_timestamp_sidecars": {
20
+ "authoritative": false,
21
+ "files": [
22
+ "timestamps_zed_SN12933256.csv"
23
+ ],
24
+ "semantics": "compatibility/debug artifacts only; manifest Parquet sidecars are authoritative"
25
+ },
26
+ "recording_dir": "recordings/20261011_161849_867460",
27
+ "recording_manifest": {
28
+ "authoritative_timestamp_source": "streams/<stream_id>/timestamps.parquet",
29
+ "container_pts_for_synchronization": false,
30
+ "manifest_timestamp_sidecars": [
31
+ {
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+ "authoritative": true,
33
+ "path": "recordings/20261011_161849_867460/streams/zed_12933256_left_rgb/timestamps.parquet",
34
+ "recording_relative_path": "streams/zed_12933256_left_rgb/timestamps.parquet",
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+ "stream_id": "zed_12933256_left_rgb"
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+ },
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+ {
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+ "authoritative": true,
39
+ "path": "recordings/20261011_161849_867460/streams/zed_12933256_right_rgb/timestamps.parquet",
40
+ "recording_relative_path": "streams/zed_12933256_right_rgb/timestamps.parquet",
41
+ "stream_id": "zed_12933256_right_rgb"
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+ },
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+ {
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+ "authoritative": true,
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+ "path": "recordings/20261011_161849_867460/streams/zed_12933256_depth_zed_sdk_neural_plus/timestamps.parquet",
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+ "recording_relative_path": "streams/zed_12933256_depth_zed_sdk_neural_plus/timestamps.parquet",
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+ "stream_id": "zed_12933256_depth_zed_sdk_neural_plus"
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+ }
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+ ],
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+ "path": "recordings/20261011_161849_867460/recording_manifest.json",
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+ "present": true,
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+ "stream_count": 3
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+ },
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+ "recording_metadata": {
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+ "calibration": {
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+ "packaged": false,
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+ "reason": "calibration_run_dir was not provided"
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+ },
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+ "camera_close_reports": [
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+ {
61
+ "camera_lock_acquired_for_close": true,
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+ "camera_type": "zed",
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+ "close_warning_messages": [],
64
+ "read_thread_alive_after_stop": false,
65
+ "read_thread_alive_before_close": false,
66
+ "recording_enabled_after_disable": false,
67
+ "recording_enabled_before_close": true,
68
+ "recording_stop_reason": "duration_sec_limit",
69
+ "sdk_close_attempted": true,
70
+ "sdk_close_exception": null,
71
+ "sdk_close_retry_count": 0,
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+ "sdk_is_opened_after_close": false,
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+ "sdk_is_opened_before_close": true,
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+ "serial_number": "12933256"
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+ }
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+ ],
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+ "camera_image_controls": {
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+ "auto_controls_frozen_during_recording": false,
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+ "errors": [],
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+ "established_before_warmup": true,
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+ "mode": "native_auto_defaults",
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+ "per_camera": {
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+ "12933256": {
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+ "auto_exposure_gain_enabled": true,
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+ "auto_white_balance_enabled": true,
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+ "camera_type": "zed",
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+ "controls": {
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+ "AEC_AGC": {
89
+ "after": 1,
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+ "before": 1,
91
+ "status": "enabled"
92
+ },
93
+ "BRIGHTNESS": {
94
+ "after": 4,
95
+ "before": 4,
96
+ "status": "reset_to_sdk_default"
97
+ },
98
+ "CONTRAST": {
99
+ "after": 4,
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+ "before": 4,
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+ "status": "reset_to_sdk_default"
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+ },
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+ "EXPOSURE": {
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+ "after": 91,
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+ "before": 91,
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+ "status": "reset_to_sdk_default"
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+ },
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+ "GAIN": {
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+ "after": 16,
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+ "before": 16,
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+ "status": "reset_to_sdk_default"
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+ },
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+ "GAMMA": {
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+ "after": 5,
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+ "before": 5,
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+ "status": "reset_to_sdk_default"
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+ },
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+ "HUE": {
119
+ "after": 0,
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+ "before": 0,
121
+ "status": "reset_to_sdk_default"
122
+ },
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+ "SATURATION": {
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+ "after": 4,
125
+ "before": 4,
126
+ "status": "reset_to_sdk_default"
127
+ },
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+ "SHARPNESS": {
129
+ "after": 3,
130
+ "before": 3,
131
+ "status": "reset_to_sdk_default"
132
+ },
133
+ "WHITEBALANCE_AUTO": {
134
+ "after": 1,
135
+ "before": 1,
136
+ "status": "enabled"
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+ },
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+ "WHITEBALANCE_TEMPERATURE": {
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+ "after": 4700,
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+ "before": 4700,
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+ "status": "reset_to_sdk_default"
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+ }
143
+ },
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+ "errors": [],
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+ "initial_auto_exposure_gain": true,
146
+ "initial_auto_white_balance": true,
147
+ "mechanism": "sl.Camera.set_camera_settings(setting, VIDEO_SETTINGS_VALUE_AUTO=-1) for ISP + exposure/gain/white-balance, then AEC_AGC=1 and WHITEBALANCE_AUTO=1 with mode readback",
148
+ "status": "established",
149
+ "unsupported_controls": []
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+ }
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+ },
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+ "policy_replay": false,
153
+ "readback_semantics": "Per-control 'before'/'after' values are single startup readbacks taken while establishing native auto control; exposure, gain and white balance keep changing under the cameras' own automatic control for the whole recording and are never frozen into manual settings.",
154
+ "status": "established",
155
+ "unmanaged_cameras": []
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+ },
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+ "camera_rig_profile_name": "single-zed-right-of-ur10",
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+ "cameras": [
159
+ {
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+ "actual_opened_profile": {
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+ "actual_fps": 15.0,
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+ "actual_fps_source": "camera_information.camera_configuration.fps",
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+ "depth_mode": "NEURAL_PLUS",
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+ "fps": 15.0,
165
+ "image_format": "rgb8",
166
+ "requested_fps": 15.0,
167
+ "resolution": [
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+ 1242,
169
+ 2208
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+ ],
171
+ "stream_profile_name": "HD2K",
172
+ "svo_compression_mode": "H265_LOSSLESS",
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+ "svo_compression_mode_source": "requested_enum_passed_to_sl.RecordingParameters"
174
+ },
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+ "camera_metadata": {
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+ "camera_id": "right-of-ur10",
177
+ "camera_type": "zed",
178
+ "capabilities": [
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+ "color",
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+ "raw_depth",
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+ "aligned_depth_to_color",
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+ "depth",
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+ "stereo_color",
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+ "right_color"
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+ ],
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+ "color_T_depth": null,
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+ "color_T_ir_left": null,
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+ "color_T_ir_right": null,
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+ "color_camera_frame": null,
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+ "color_intrinsics": [
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+ [
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+ "depth_camera_frame": "zed_12933256_left_rgb_camera",
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+ "depth_frame_convention": "ZED sl.MEASURE.DEPTH depth maps are expressed in the left RGB camera optical frame.",
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+ "depth_intrinsics": [
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+ [
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+ 0.0,
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+ ],
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+ 608.9989013671875
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+ ],
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+ ]
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+ "depth_scale_m": null,
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+ "fps": 15.0,
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+ "ir_left_T_color": null,
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+ "ir_left_camera_frame": null,
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+ "ir_right_T_color": null,
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+ "ir_right_camera_frame": null,
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+ "left_camera_frame": "zed_12933256_left_rgb_camera",
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+ "left_rgb_camera_T_right_rgb_camera": [
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+ [
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+ 0.0,
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+ 0.06304030865430832
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+ ],
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+ ],
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+ [
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+ 1.0,
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+ 0.0
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+ ],
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+ [
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+ 0.0,
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+ 0.0,
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+ 0.0,
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+ 1.0
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+ ]
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+ ],
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+ "metadata": {
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+ "aligned_depth_target": "left_color",
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+ "color_distortion_coefficients": null,
263
+ "color_distortion_model": null,
264
+ "color_image_geometry": "zed_rectified_rgb",
265
+ "color_is_rectified": true,
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+ "color_projection_model_used": "rectified_pinhole",
267
+ "color_rectification_source": "zed_sdk_rectified_view",
268
+ "depth_units": "metres",
269
+ "input_type": "INPUT_TYPE.USB",
270
+ "invalid_depth_convention": "ZED SDK values are preserved, including non-finite invalid depth.",
271
+ "offline_recording": false,
272
+ "usb": {
273
+ "bus": "8",
274
+ "input_type_raw": "INPUT_TYPE.USB",
275
+ "is_usb3": true,
276
+ "note": null,
277
+ "pci_controller_path": "/sys/devices/pci0000:00",
278
+ "port_path": "1",
279
+ "product": "ZED-M",
280
+ "speed_mbps": 5000.0,
281
+ "sysfs_path": "/sys/devices/pci0000:00/0000:00:08.3/0000:66:00.4/usb8/8-1",
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+ "usb_type_descriptor": "3.00",
283
+ "usb_validation_source": "linux_sysfs_video_device",
284
+ "video_device_path": "/dev/video2"
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+ },
286
+ "usb_product": "ZED-M",
287
+ "usb_speed_mbps": 5000.0,
288
+ "usb_type_descriptor": "3.00"
289
+ },
290
+ "model": "ZED-M",
291
+ "resolution_hw": [
292
+ 1242,
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+ 2208
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+ ],
295
+ "right_camera_frame": "zed_12933256_right_rgb_camera",
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+ "right_rgb_camera_T_left_rgb_camera": [
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+ [
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+ 0.0,
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+ 0.0,
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+ -0.06304030865430832
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+ ],
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+ [
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+ [
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+ 1.0,
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+ 0.0
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+ [
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+ ]
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+ ],
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+ "serial_number": "12933256",
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+ "stereo_baseline_m": 0.06304030865430832,
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+ "transform_convention": "a_T_b maps points from frame b into frame a: p_a = T * p_b"
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+ },
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+ "camera_type": "zed",
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+ "converter_mapping": "official sidecar row R maps to native decoded frame index 1 + R; native frames [0, 1) were written during post-native priming after enable_recording() and are not listed in the official sidecar.",
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+ "dropped_non_monotonic_timestamp_count": 0,
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+ "dropped_stale_preofficial_timestamp_count": 0,
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+ "first_official_native_frame_index": 1,
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+ "frame_count": 1809,
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+ "name": "right-of-ur10",
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+ "native_container_includes_post_native_priming_frames": true,
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+ "native_container_includes_preroll_frames": false,
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+ "native_frame_index_origin": "zero_based_sequential_grab_after_enable_recording_including_post_native_priming",
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+ "official_frame_count": 1809,
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+ "post_native_discarded_frame_count": 0,
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+ "post_native_priming_frame_count": 1,
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+ "preroll_frame_count": 15,
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+ "recording_path": "ZED-M_SN12933256.svo2",
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+ "serial_number": "12933256",
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+ "stream_summaries": {
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+ "zed_12933256_depth_zed_sdk_neural_plus": {
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+ "camera_type": "zed",
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+ "first_inter_frame_gap_ns": 66396000,
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+ "host_timestamp_max_ns": 1791750055941798865,
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+ "host_timestamp_min_ns": 1791749935938383148,
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+ "host_timestamp_source": "time.time_ns_after_record_frame",
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+ "large_gaps": [
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+ {
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+ "gap_ns": 132896000,
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+ },
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+ {
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+ "from_row": 679,
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+ }
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+ ],
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+ "median_gap_ns": 66349000.0,
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+ "modality": "depth",
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+ "nominal_frame_period_ns": 66666667,
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+ "non_monotonic_timestamp_count": 0,
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+ "observed_fps": 15.0661378452283,
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+ "official_frame_count": 1809,
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+ "physical_camera_id": "zed_12933256",
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+ "preroll_frame_count": 15,
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+ "row_count": 1809,
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+ "sdk_frame_number_gap_count": 0,
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+ "sdk_frame_number_gaps": [],
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+ "sdk_frame_number_reportable": false,
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+ "timestamp_max_ns": 1791750055860286876,
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+ "timestamp_min_ns": 1791749935856074876,
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+ "timestamp_source": "sl.TIME_REFERENCE.IMAGE",
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+ "warnings": [
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+ "large_timestamp_gap"
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+ ]
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+ },
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+ "zed_12933256_left_rgb": {
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+ "camera_type": "zed",
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+ "default_nearest_neighbor_tolerance_ns": 66666667,
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+ "expected_fps": 15.0,
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+ "host_timestamp_max_ns": 1791750055941798865,
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+ "host_timestamp_min_ns": 1791749935938383148,
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+ "host_timestamp_source": "time.time_ns_after_record_frame",
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+ "large_gaps": [
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+ {
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+ "gap_ns": 132896000,
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+ },
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+ {
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+ "gap_ns": 132528000,
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+ "to_row": 680
411
+ }
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+ ],
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+ "median_gap_ns": 66349000.0,
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+ "modality": "left_rgb",
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+ "nominal_frame_period_ns": 66666667,
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+ "non_monotonic_timestamp_count": 0,
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+ "observed_fps": 15.0661378452283,
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+ "official_frame_count": 1809,
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+ "physical_camera_id": "zed_12933256",
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+ "preroll_frame_count": 15,
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+ "row_count": 1809,
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+ "sdk_frame_number_gap_count": 0,
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+ "sdk_frame_number_gaps": [],
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+ "sdk_frame_number_reportable": false,
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+ "serial_number": "12933256",
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+ "startup_gap_excluded_from_warnings": false,
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+ "stream_id": "zed_12933256_left_rgb",
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+ "strict_alignment_warning_tolerance_ns": 33333334,
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+ "timestamp_domain": "zed_image",
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+ "timestamp_gap_warning_threshold_ns": 100000000,
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+ "timestamp_max_ns": 1791750055860286876,
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+ "timestamp_min_ns": 1791749935856074876,
434
+ "timestamp_source": "sl.TIME_REFERENCE.IMAGE",
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+ "warnings": [
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+ "large_timestamp_gap"
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+ ]
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+ },
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+ "zed_12933256_right_rgb": {
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+ "camera_type": "zed",
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+ "default_nearest_neighbor_tolerance_ns": 66666667,
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+ "duplicate_timestamp_count": 0,
443
+ "expected_fps": 15.0,
444
+ "first_inter_frame_gap_ns": 66396000,
445
+ "host_timestamp_max_ns": 1791750055941798865,
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+ "host_timestamp_min_ns": 1791749935938383148,
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+ "host_timestamp_source": "time.time_ns_after_record_frame",
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+ "large_gaps": [
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+ "from_row": 417,
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+ "gap_ns": 132896000,
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+ },
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+ {
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+ "from_row": 679,
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+ "gap_ns": 132528000,
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+ "to_row": 680
459
+ }
460
+ ],
461
+ "max_gap_ns": 132896000,
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+ "median_gap_ns": 66349000.0,
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+ "modality": "right_rgb",
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+ "nominal_frame_period_ns": 66666667,
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+ "non_monotonic_timestamp_count": 0,
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+ "observed_fps": 15.0661378452283,
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+ "official_frame_count": 1809,
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+ "physical_camera_id": "zed_12933256",
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+ "preroll_frame_count": 15,
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+ "row_count": 1809,
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+ "sdk_frame_number_gap_count": 0,
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+ "sdk_frame_number_gaps": [],
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+ "sdk_frame_number_reportable": false,
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+ "serial_number": "12933256",
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+ "stream_id": "zed_12933256_right_rgb",
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+ "timestamp_domain": "zed_image",
479
+ "timestamp_gap_warning_threshold_ns": 100000000,
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1
+ # Recording Discovery Report
2
+
3
+ Recording directory: `recordings/20261011_161849_867460`
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+
5
+ ## Clock Policy
6
+
7
+ - Do not assume camera/device/robot timestamps share a clock domain.
8
+ - Use manifest Parquet timestamp sidecars as authoritative when `recording_manifest.json` is present.
9
+ - For explicit legacy conversion, use joined, trustworthy host timestamps as default synchronization time when available.
10
+ - Preserve acquisition/device timestamps as auxiliary columns.
11
+ - Mark old embedded robot states as `lcm_utime_or_robot_clock` when no host receive time exists.
12
+
13
+ ## Source Files
14
+
15
+ - `ZED-M_SN12933256.svo2`: 4697034827 bytes
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+
17
+ ## Timestamp Sources
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+
19
+ - Authoritative timestamp source: `streams/<stream_id>/timestamps.parquet`.
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+ - Native video/container PTS is not used for cross-stream synchronization.
21
+ - Legacy CSV timestamp sidecars, when present, are compatibility/debug artifacts only.
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+
23
+ ### Manifest Parquet Sidecars
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+ - `zed_12933256_left_rgb`: `streams/zed_12933256_left_rgb/timestamps.parquet`
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+ - `zed_12933256_right_rgb`: `streams/zed_12933256_right_rgb/timestamps.parquet`
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+ - `zed_12933256_depth_zed_sdk_neural_plus`: `streams/zed_12933256_depth_zed_sdk_neural_plus/timestamps.parquet`
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+
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+ ## Legacy CSV Timestamp Sidecars
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+
30
+ - `timestamps_zed_SN12933256.csv`: rows=1809, frame gaps=0, device duplicate timestamps=0, device non-monotonic=0
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+
32
+ ## Recording Code Findings
33
+
34
+ ### new_record_multi_camera
35
+ - ZED sidecar device_timestamp_ns comes from sl.TIME_REFERENCE.IMAGE after grab().
36
+ - RealSense sidecar device_timestamp_ns comes from color_frame.get_timestamp() ms converted to ns.
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+ - host_timestamp_ns is time.time_ns() sampled immediately after recorder.record_frame().
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+
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+ ### old_zed_robot_state_recording
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+ - PandaStatus and PandaGripperStatus are stored as ZED SVOData custom keys.
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+ - SVOData timestamp is set from payload timestamp_us via set_microseconds().
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+ - No independent host receive timestamp is present for old embedded robot states.
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+ "readback_semantics": "Per-control 'before'/'after' values are single startup readbacks taken while establishing native auto control; exposure, gain and white balance keep changing under the cameras' own automatic control for the whole recording and are never frozen into manual settings.",
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