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To realize video key clip extraction with the help of Qwen2.5-VL, you can follow the steps below:
- Environment Configuration: first install decord library to accelerate video decoding (non-Linux users need to install the source code), to ensure that the GPU video memory ≥ 16GB (7B model)
- code implementation: After processing the video file using processor.process_video(), ask questions through the following prompt template:
'Please extract the timestamps of all character dialog scenes in this video (format: start second - end second)' - parameter optimization::
- Set max_new_tokens=512 to get a more detailed output
- Add -flash-attn2 parameter to accelerate processing
- Control resolution balance speed accuracy with min_pixels=512
- Advanced Techniques: For very long videos, it can be processed in segments, first using 30s sampling to generate chapter summaries, and then analyzing the depth of the target chapters.
Typical output example: '00:12-00:35 Product Features | 02:18-02:45 Price Note | ...', which can be directly imported into the editing software timeline.
This answer comes from the articleQwen2.5-VL: an open source multimodal grand model supporting image-video document parsingThe
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