CODEWITHSUNDEEP
pythonffmpeg
DevLoverUmar
DevLoverUmar

Reputation: 14011

Unable to create audio file from mp4 file with ffmpeg

I'm unable to create single channel audio file with ffmpeg from an mp4 file, with the following python code

command_line = "ffmpeg -i "+full_file_path+" -ac 1 -ar 16000  -vn "+full_file_path[:-4]+".wav"        
args = shlex.split(command_line)

Here is the media info of my mp4 file

from pydub.utils import mediainfo
print(mediainfo(full_file_path))

Output

{'index': '0', 'codec_name': 'h264', 'codec_long_name': 'H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10', 'profile': 'High', 'codec_type': 'video', 'codec_time_base': '1/48', 'codec_tag_string': 'avc1', 'codec_tag': '0x31637661', 'width': '1920', 'height': '1080', 'coded_width': '1920', 'coded_height': '1088', 'has_b_frames': '2', 'sample_aspect_ratio': '1:1', 'display_aspect_ratio': '16:9', 'pix_fmt': 'yuv420p', 'level': '40', 'color_range': 'unknown', 'color_space': 'unknown', 'color_transfer': 'unknown', 'color_primaries': 'unknown', 'chroma_location': 'left', 'field_order': 'unknown', 'timecode': 'N/A', 'refs': '1', 'is_avc': 'true', 'nal_length_size': '4', 'id': 'N/A', 'r_frame_rate': '24/1', 'avg_frame_rate': '24/1', 'time_base': '1/12288', 'start_pts': '0', 'start_time': '0.000000', 'duration_ts': '107520', 'duration': '8.750000', 'bit_rate': '1036420', 'max_bit_rate': 'N/A', 'bits_per_raw_sample': '8', 'nb_frames': '210', 'nb_read_frames': 'N/A', 'nb_read_packets': 'N/A', 'DISPOSITION': {'default': '1', 'dub': '0', 'original': '0', 'comment': '0', 'lyrics': '0', 'karaoke': '0', 'forced': '0', 'hearing_impaired': '0', 'visual_impaired': '0', 'clean_effects': '0', 'attached_pic': '0', 'timed_thumbnails': '0'}, 'TAG': {'language': 'und', 'handler_name': 'VideoHandler', 'major_brand': 'isom', 'minor_version': '512', 'compatible_brands': 'isomiso2avc1mp41', 'encoder': 'Lavf58.26.101'}, 'filename': './sample_dataset_FaceForensic/fake/abc.mp4', 'nb_streams': '1', 'nb_programs': '0', 'format_name': 'mov,mp4,m4a,3gp,3g2,mj2', 'format_long_name': 'QuickTime / MOV', 'size': '1133585', 'probe_score': '100'}

Upvotes: 0

Views: 295

Answers (1)

llogan
llogan

Reputation: 134283

Your MP4 file has no audio, so ffmpeg can't extract any audio from it.

Upvotes: 2

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