Add option for running ffmpeg_microphone_live as a background process (#32838)

* Add option for running ffmpeg_microphone_live as a background process

* Code quality checks for audio_utils

* Code clean up for audio_utils

* Fixing logic in ffmpeg_microphone calls in audio_utils

* Allowing any arbitrary arguments to be passed to ffmpeg_microphone_live

* Formatting

* Fixing last problems with adding ffmpeg_additional_args

* Fixing default arguments and formatting issues

* Fixing comments for ffmpeg_additional_args

* Adding two shorts tests for ffmpeg_microphone_live

* Fixing test bug

tests/pipelines/test_pipelines_automatic_speech_recognition.py

@@ -33,7 +33,7 @@ from transformers import (
     WhisperForConditionalGeneration,
 )
 from transformers.pipelines import AutomaticSpeechRecognitionPipeline, pipeline
-from transformers.pipelines.audio_utils import chunk_bytes_iter
+from transformers.pipelines.audio_utils import chunk_bytes_iter, ffmpeg_microphone_live
 from transformers.pipelines.automatic_speech_recognition import _find_timestamp_sequence, chunk_iter
 from transformers.testing_utils import (
     compare_pipeline_output_to_hub_spec,
@@ -1989,3 +1989,11 @@ class AudioUtilsTest(unittest.TestCase):
         )
         with self.assertRaises(StopIteration):
             next(iter_)
+
+    def test_ffmpeg_no_additional_args(self):
+        mic = ffmpeg_microphone_live(16000, 2.0)
+        mic.close()
+
+    def test_ffmpeg_additional_args(self):
+        mic = ffmpeg_microphone_live(16000, 2.0, ffmpeg_additional_args=["-nostdin"])
+        mic.close()