diff --git a/sleap/nn/tracking.py b/sleap/nn/tracking.py
index b6aae344b..2c1dee615 100644
--- a/sleap/nn/tracking.py
+++ b/sleap/nn/tracking.py
@@ -5,7 +5,7 @@
 import sys
 from collections import deque
 from time import time
-from typing import Callable, Deque, Dict, Iterable, List, Optional, Tuple
+from typing import Callable, Deque, Dict, Iterable, Iterator, List, Optional, Tuple
 
 import attr
 import cv2
@@ -546,6 +546,82 @@ def run_step(self, lf: LabeledFrame) -> LabeledFrame:
             instances=self.track(**track_args),
         )
 
+    def _run_tracker_json(
+        self,
+        frames: List[LabeledFrame],
+        max_length: int = 30,
+    ) -> Iterator[LabeledFrame]:
+        n_total = len(frames)
+        n_processed = 0
+        n_batch = 0
+        n_recent = deque(maxlen=max_length)
+        elapsed_recent = deque(maxlen=max_length)
+        last_report = time()
+        t0_all = time()
+        t0_batch = time()
+
+        for lf in frames:
+            new_lf = self.run_step(lf)
+
+            # Track timing and progress
+            elapsed_all = time() - t0_all
+            n_processed += 1
+            n_batch += 1
+
+            # Report
+            if time() > last_report + self.report_period:
+                elapsed_batch = time() - t0_batch
+                t0_batch = time()
+
+                # Compute recent rate
+                n_recent.append(n_batch)
+                n_batch = 0
+                elapsed_recent.append(elapsed_batch)
+                rate = sum(n_recent) / sum(elapsed_recent)
+                eta = (n_total - n_processed) / rate
+
+                print(
+                    json.dumps(
+                        {
+                            "n_processed": n_processed,
+                            "n_total": n_total,
+                            "elapsed": elapsed_all,
+                            "rate": rate,
+                            "eta": eta
+                        }
+                    ),
+                    flush=True,
+                )
+                last_report = time()
+
+            yield new_lf
+
+    def _run_tracker_rich(self, frames: List[LabeledFrame]) -> Iterator[LabeledFrame]:
+        with rich.progress.Progress(
+            "{task.description}",
+            rich.progress.BarColumn(),
+            "[progress.percentage]{task.percentage:>3.0f}%",
+            "ETA:",
+            rich.progress.TimeRemainingColumn(),
+            RateColumn(),
+            auto_refresh=False,
+            refresh_per_second=self.report_rate,
+            speed_estimate_period=5,
+        ) as progress:
+            task = progress.add_task("Tracking...", total=len(frames))
+            last_report = time()
+            for lf in frames:
+                new_lf = self.run_step(lf)
+
+                progress.update(task, advance=1)
+
+                # Handle refreshing manually to support notebooks.
+                if time() > last_report + self.report_period:
+                    progress.refresh()
+                    last_report = time()
+
+                yield new_lf
+
     def run_tracker(
         self,
         frames: List[LabeledFrame],
@@ -567,84 +643,16 @@ def run_tracker(
             return frames
 
         verbosity = verbosity or self.verbosity
-        new_lfs = []
 
         # Run tracking on every frame
         if verbosity == "rich":
-            with rich.progress.Progress(
-                "{task.description}",
-                rich.progress.BarColumn(),
-                "[progress.percentage]{task.percentage:>3.0f}%",
-                "ETA:",
-                rich.progress.TimeRemainingColumn(),
-                RateColumn(),
-                auto_refresh=False,
-                refresh_per_second=self.report_rate,
-                speed_estimate_period=5,
-            ) as progress:
-                task = progress.add_task("Tracking...", total=len(frames))
-                last_report = time()
-                for lf in frames:
-                    new_lf = self.run_step(lf)
-                    new_lfs.append(new_lf)
-
-                    progress.update(task, advance=1)
-
-                    # Handle refreshing manually to support notebooks.
-                    elapsed_since_last_report = time() - last_report
-                    if elapsed_since_last_report > self.report_period:
-                        progress.refresh()
+            new_lfs = list(self._run_tracker_rich(frames))
 
         elif verbosity == "json":
-            n_total = len(frames)
-            n_processed = 0
-            n_batch = 0
-            elapsed_all = 0
-            n_recent = deque(maxlen=30)
-            elapsed_recent = deque(maxlen=30)
-            last_report = time()
-            t0_all = time()
-            t0_batch = time()
-            for lf in frames:
-                new_lf = self.run_step(lf)
-                new_lfs.append(new_lf)
-
-                # Track timing and progress.
-                elapsed_all = time() - t0_all
-                n_processed += 1
-                n_batch += 1
-
-                # Report.
-                elapsed_since_last_report = time() - last_report
-                if elapsed_since_last_report > self.report_period:
-                    elapsed_batch = time() - t0_batch
-                    t0_batch = time()
-
-                    # Compute recent rate.
-                    n_recent.append(n_batch)
-                    n_batch = 0
-                    elapsed_recent.append(elapsed_batch)
-                    rate = sum(n_recent) / sum(elapsed_recent)
-                    eta = (n_total - n_processed) / rate
-
-                    print(
-                        json.dumps(
-                            {
-                                "n_processed": n_processed,
-                                "n_total": n_total,
-                                "elapsed": elapsed_all,
-                                "rate": rate,
-                                "eta": eta,
-                            }
-                        ),
-                        flush=True,
-                    )
-                    last_report = time()
+            new_lfs = list(self._run_tracker_json(frames))
 
         else:
-            for lf in frames:
-                new_lf = self.run_step(lf)
-                new_lfs.append(new_lf)
+            new_lfs = list(self.run_step(lf) for lf in frames)
 
         # Run final_pass
         if final_pass: