2026-04-04 14:44:00,059 Loading Gemma text encoder...
Using a slow image processor as `use_fast` is unset and a slow processor was saved with this model. `use_fast=True` will be the default behavior in v4.52, even if the model was saved with a slow processor. This will result in minor differences in outputs. You'll still be able to use a slow processor with `use_fast=False`.
2026-04-04 14:44:06,694   Text encoder loaded in 6.6s | VRAM: 22.8GB
2026-04-04 14:44:06,695 Loading embeddings processor...
2026-04-04 14:44:07,884   Embeddings processor loaded in 1.2s | VRAM: 28.7GB
2026-04-04 14:44:07,884 Loading video encoder...
2026-04-04 14:44:08,061   Video encoder loaded in 0.2s | VRAM: 29.3GB
2026-04-04 14:44:08,061 Loading spatial upsampler...
2026-04-04 14:44:08,268   Upsampler loaded in 0.2s | VRAM: 30.2GB
2026-04-04 14:44:08,268 Loading transformer...
2026-04-04 14:44:14,229   Transformer loaded in 6.0s | VRAM: 48.3GB
2026-04-04 14:44:14,229 Loading video decoder...
2026-04-04 14:44:14,423   Video decoder loaded in 0.2s | VRAM: 49.1GB
2026-04-04 14:44:14,423 Loading audio decoder + vocoder...
2026-04-04 14:44:15,303   Audio decoder+vocoder loaded in 0.9s | VRAM: 49.4GB
2026-04-04 14:44:15,303 ALL MODELS LOADED in 15.2s
2026-04-04 14:44:15,304 Total VRAM: 49.41 GB / 79.3 GB
Warmup...

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============================================================
BURST TEST: 10 videos WITH file save
============================================================

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2026-04-04 14:44:27,340 Video saved to /home/ubuntu/ltx2_bench_output/burst_0.mp4
  [1/10] 6.66s  (denoise: 4.12s, encode: 2.05s)

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2026-04-04 14:44:33,986 Video saved to /home/ubuntu/ltx2_bench_output/burst_1.mp4
  [2/10] 6.65s  (denoise: 4.12s, encode: 2.02s)

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2026-04-04 14:44:40,614 Video saved to /home/ubuntu/ltx2_bench_output/burst_2.mp4
  [3/10] 6.63s  (denoise: 4.13s, encode: 2.00s)

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2026-04-04 14:44:47,265 Video saved to /home/ubuntu/ltx2_bench_output/burst_3.mp4
  [4/10] 6.65s  (denoise: 4.14s, encode: 2.02s)

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2026-04-04 14:44:53,900 Video saved to /home/ubuntu/ltx2_bench_output/burst_4.mp4
  [5/10] 6.64s  (denoise: 4.13s, encode: 2.01s)

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2026-04-04 14:45:00,542 Video saved to /home/ubuntu/ltx2_bench_output/burst_5.mp4
  [6/10] 6.64s  (denoise: 4.12s, encode: 2.01s)

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2026-04-04 14:45:07,212 Video saved to /home/ubuntu/ltx2_bench_output/burst_6.mp4
  [7/10] 6.67s  (denoise: 4.14s, encode: 2.02s)

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2026-04-04 14:45:13,866 Video saved to /home/ubuntu/ltx2_bench_output/burst_7.mp4
  [8/10] 6.65s  (denoise: 4.13s, encode: 2.02s)

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2026-04-04 14:45:20,505 Video saved to /home/ubuntu/ltx2_bench_output/burst_8.mp4
  [9/10] 6.64s  (denoise: 4.11s, encode: 2.03s)

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2026-04-04 14:45:27,164 Video saved to /home/ubuntu/ltx2_bench_output/burst_9.mp4
  [10/10] 6.66s  (denoise: 4.14s, encode: 2.02s)
Total: 66.5s | Rate: 9.0 videos/min

============================================================
BURST TEST: 10 videos WITHOUT file save (pure GPU)
============================================================

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  [1/10] 4.65s

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  [2/10] 4.65s

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 75%|███████▌  | 6/8 [00:01<00:00,  3.28it/s]
 88%|████████▊ | 7/8 [00:02<00:00,  3.27it/s]
100%|██████████| 8/8 [00:02<00:00,  3.28it/s]
100%|██████████| 8/8 [00:02<00:00,  3.27it/s]

  0%|          | 0/3 [00:00<?, ?it/s]
 33%|███▎      | 1/3 [00:00<00:01,  1.78it/s]
 67%|██████▋   | 2/3 [00:01<00:00,  1.78it/s]
100%|██████████| 3/3 [00:01<00:00,  1.78it/s]
100%|██████████| 3/3 [00:01<00:00,  1.78it/s]
  [3/10] 4.64s

  0%|          | 0/8 [00:00<?, ?it/s]
 12%|█▎        | 1/8 [00:00<00:02,  3.28it/s]
 25%|██▌       | 2/8 [00:00<00:01,  3.28it/s]
 38%|███▊      | 3/8 [00:00<00:01,  3.28it/s]
 50%|█████     | 4/8 [00:01<00:01,  3.28it/s]
 62%|██████▎   | 5/8 [00:01<00:00,  3.27it/s]
 75%|███████▌  | 6/8 [00:01<00:00,  3.26it/s]
 88%|████████▊ | 7/8 [00:02<00:00,  3.27it/s]
100%|██████████| 8/8 [00:02<00:00,  3.28it/s]
100%|██████████| 8/8 [00:02<00:00,  3.27it/s]

  0%|          | 0/3 [00:00<?, ?it/s]
 33%|███▎      | 1/3 [00:00<00:01,  1.78it/s]
 67%|██████▋   | 2/3 [00:01<00:00,  1.78it/s]
100%|██████████| 3/3 [00:01<00:00,  1.78it/s]
100%|██████████| 3/3 [00:01<00:00,  1.78it/s]
  [4/10] 4.64s

  0%|          | 0/8 [00:00<?, ?it/s]
 12%|█▎        | 1/8 [00:00<00:02,  3.26it/s]
 25%|██▌       | 2/8 [00:00<00:01,  3.28it/s]
 38%|███▊      | 3/8 [00:00<00:01,  3.29it/s]
 50%|█████     | 4/8 [00:01<00:01,  3.29it/s]
 62%|██████▎   | 5/8 [00:01<00:00,  3.26it/s]
 75%|███████▌  | 6/8 [00:01<00:00,  3.25it/s]
 88%|████████▊ | 7/8 [00:02<00:00,  3.26it/s]
100%|██████████| 8/8 [00:02<00:00,  3.27it/s]
100%|██████████| 8/8 [00:02<00:00,  3.27it/s]

  0%|          | 0/3 [00:00<?, ?it/s]
 33%|███▎      | 1/3 [00:00<00:01,  1.78it/s]
 67%|██████▋   | 2/3 [00:01<00:00,  1.78it/s]
100%|██████████| 3/3 [00:01<00:00,  1.78it/s]
100%|██████████| 3/3 [00:01<00:00,  1.78it/s]
  [5/10] 4.64s

  0%|          | 0/8 [00:00<?, ?it/s]
 12%|█▎        | 1/8 [00:00<00:02,  3.29it/s]
 25%|██▌       | 2/8 [00:00<00:01,  3.29it/s]
 38%|███▊      | 3/8 [00:00<00:01,  3.29it/s]
 50%|█████     | 4/8 [00:01<00:01,  3.29it/s]
 62%|██████▎   | 5/8 [00:01<00:00,  3.28it/s]
 75%|███████▌  | 6/8 [00:01<00:00,  3.29it/s]
 88%|████████▊ | 7/8 [00:02<00:00,  3.28it/s]
100%|██████████| 8/8 [00:02<00:00,  3.28it/s]
100%|██████████| 8/8 [00:02<00:00,  3.28it/s]

  0%|          | 0/3 [00:00<?, ?it/s]
 33%|███▎      | 1/3 [00:00<00:01,  1.78it/s]
 67%|██████▋   | 2/3 [00:01<00:00,  1.78it/s]
100%|██████████| 3/3 [00:01<00:00,  1.78it/s]
100%|██████████| 3/3 [00:01<00:00,  1.78it/s]
  [6/10] 4.63s

  0%|          | 0/8 [00:00<?, ?it/s]
 12%|█▎        | 1/8 [00:00<00:02,  3.28it/s]
 25%|██▌       | 2/8 [00:00<00:01,  3.28it/s]
 38%|███▊      | 3/8 [00:00<00:01,  3.28it/s]
 50%|█████     | 4/8 [00:01<00:01,  3.28it/s]
 62%|██████▎   | 5/8 [00:01<00:00,  3.28it/s]
 75%|███████▌  | 6/8 [00:01<00:00,  3.28it/s]
 88%|████████▊ | 7/8 [00:02<00:00,  3.28it/s]
100%|██████████| 8/8 [00:02<00:00,  3.28it/s]
100%|██████████| 8/8 [00:02<00:00,  3.28it/s]

  0%|          | 0/3 [00:00<?, ?it/s]
 33%|███▎      | 1/3 [00:00<00:01,  1.78it/s]
 67%|██████▋   | 2/3 [00:01<00:00,  1.78it/s]
100%|██████████| 3/3 [00:01<00:00,  1.78it/s]
100%|██████████| 3/3 [00:01<00:00,  1.78it/s]
  [7/10] 4.62s

  0%|          | 0/8 [00:00<?, ?it/s]
 12%|█▎        | 1/8 [00:00<00:02,  3.25it/s]
 25%|██▌       | 2/8 [00:00<00:01,  3.26it/s]
 38%|███▊      | 3/8 [00:00<00:01,  3.27it/s]
 50%|█████     | 4/8 [00:01<00:01,  3.28it/s]
 62%|██████▎   | 5/8 [00:01<00:00,  3.28it/s]
 75%|███████▌  | 6/8 [00:01<00:00,  3.28it/s]
 88%|████████▊ | 7/8 [00:02<00:00,  3.28it/s]
100%|██████████| 8/8 [00:02<00:00,  3.28it/s]
100%|██████████| 8/8 [00:02<00:00,  3.28it/s]

  0%|          | 0/3 [00:00<?, ?it/s]
 33%|███▎      | 1/3 [00:00<00:01,  1.78it/s]
 67%|██████▋   | 2/3 [00:01<00:00,  1.78it/s]
100%|██████████| 3/3 [00:01<00:00,  1.78it/s]
100%|██████████| 3/3 [00:01<00:00,  1.78it/s]
  [8/10] 4.63s

  0%|          | 0/8 [00:00<?, ?it/s]
 12%|█▎        | 1/8 [00:00<00:02,  3.29it/s]
 25%|██▌       | 2/8 [00:00<00:01,  3.29it/s]
 38%|███▊      | 3/8 [00:00<00:01,  3.28it/s]
 50%|█████     | 4/8 [00:01<00:01,  3.29it/s]
 62%|██████▎   | 5/8 [00:01<00:00,  3.28it/s]
 75%|███████▌  | 6/8 [00:01<00:00,  3.28it/s]
 88%|████████▊ | 7/8 [00:02<00:00,  3.28it/s]
100%|██████████| 8/8 [00:02<00:00,  3.27it/s]
100%|██████████| 8/8 [00:02<00:00,  3.28it/s]

  0%|          | 0/3 [00:00<?, ?it/s]
 33%|███▎      | 1/3 [00:00<00:01,  1.78it/s]
 67%|██████▋   | 2/3 [00:01<00:00,  1.78it/s]
100%|██████████| 3/3 [00:01<00:00,  1.78it/s]
100%|██████████| 3/3 [00:01<00:00,  1.78it/s]
  [9/10] 4.63s

  0%|          | 0/8 [00:00<?, ?it/s]
 12%|█▎        | 1/8 [00:00<00:02,  3.29it/s]
 25%|██▌       | 2/8 [00:00<00:01,  3.29it/s]
 38%|███▊      | 3/8 [00:00<00:01,  3.30it/s]
 50%|█████     | 4/8 [00:01<00:01,  3.30it/s]
 62%|██████▎   | 5/8 [00:01<00:00,  3.29it/s]
 75%|███████▌  | 6/8 [00:01<00:00,  3.29it/s]
 88%|████████▊ | 7/8 [00:02<00:00,  3.29it/s]
100%|██████████| 8/8 [00:02<00:00,  3.29it/s]
100%|██████████| 8/8 [00:02<00:00,  3.29it/s]

  0%|          | 0/3 [00:00<?, ?it/s]
 33%|███▎      | 1/3 [00:00<00:01,  1.78it/s]
 67%|██████▋   | 2/3 [00:01<00:00,  1.78it/s]
100%|██████████| 3/3 [00:01<00:00,  1.78it/s]
100%|██████████| 3/3 [00:01<00:00,  1.78it/s]
  [10/10] 4.61s
Total: 46.3s | Rate: 13.0 videos/min

============================================================
SUMMARY
============================================================
With file save:    9.0 videos/min  (6.65s each)
Without file save: 13.0 videos/min  (4.63s each)
Peak VRAM: 53.52 GB


## Results: LTX-2 Throughput on A100 80GB

| Mode | Per video | Videos/min |
|---|---|---|
| **With MP4 save** | **6.65s** | **9/min** |
| **Pure GPU (no file I/O)** | **4.63s** | **13/min** |

Breakdown per video (no file save):
- Prompt encode: 0.24s
- Stage 1 (8 steps): 2.44s
- Upsample: 0.16s
- Stage 2 (3 steps): 1.69s
- VAE decode: 0.11s

**VRAM: 49.4 GB resident, 53.5 GB peak** — ~30GB headroom left. Config: 512x768, 41 frames (1.7s at 24fps), FP8 distilled.