[Misc] Add online audio_in_video test (#36775)

Signed-off-by: Isotr0py <mozf@mail2.sysu.edu.cn>

requirements/test.in

@@ -10,6 +10,7 @@ pytest-cov
 
 # testing utils
 albumentations # required for Nemotron Parse in test_common.py
+av  # required for audio_in_video tests
 backoff # required for phi4mm test
 blobfile # required for kimi-vl test
 einops # required for MPT, qwen-vl

requirements/test.txt

@@ -62,6 +62,8 @@ attrs==24.2.0
     #   referencing
 audioread==3.0.1
     # via librosa
+av==16.1.0
+    # via -r requirements/test.in
 backoff==2.2.1
     # via
     #   -r requirements/test.in