update load_video function to allow single frame loading and adjust n…

…um_segments usage in InternVL2 class

lmms_eval/models/internvl2.py

@@ -100,7 +100,7 @@ def get_index(bound, fps, max_frame, first_idx=0, num_segments=32):
     return frame_indices
 
 
-def load_video(video_path, bound=None, input_size=448, max_num=32, num_segments=32):
+def load_video(video_path, bound=None, input_size=448, max_num=1, num_segments=32):
     vr = VideoReader(video_path, ctx=cpu(0), num_threads=1)
     max_frame = len(vr) - 1
     fps = float(vr.get_avg_fps())
@@ -135,7 +135,6 @@ def __init__(
         device_map: str = "cuda:0",
         batch_size: str = "1",
         num_frame: int = 32,
-        num_segments: int = 32,
         **kwargs,
     ):
         super().__init__()
@@ -144,7 +143,6 @@ def __init__(
         self._model = AutoModel.from_pretrained(self.path, torch_dtype=torch.bfloat16, low_cpu_mem_usage=True, trust_remote_code=True, device_map=device_map).eval()
         self._tokenizer = AutoTokenizer.from_pretrained(self.path, trust_remote_code=True, device_map=device_map)
         self.num_frame = num_frame
-        self.num_segments = num_segments
 
         batch_size = int(batch_size)
         assert batch_size == 1, f"Batch size should be 1 for InternVL2, but got {batch_size}."
@@ -273,7 +271,7 @@ def generate_until(self, requests) -> List[str]:
             elif self.modality == "video":
                 assert len(visuals) == 1, f"Only one video is supported, but got {len(visuals)} videos."
                 video_path = visuals[0]
-                pixel_values, num_patches_list = load_video(video_path, num_segments=self.num_segments, max_num=self.num_frame)
+                pixel_values, num_patches_list = load_video(video_path, num_segments=self.num_frame)
                 pixel_values = pixel_values.to(torch.bfloat16).cuda()
                 video_prefix = "".join([f"Frame{i+1}: <image>\n" for i in range(len(num_patches_list))])
                 question = video_prefix + contexts