AWSラムダサブプロセスOSError：[Errno 2]そのようなファイルまたはディレクトリがありません

Question

私はffmpegを使用してamazon s3のビデオからサムネイルを収集するラムダ関数を作成しようとしています。 ffmpegバイナリはfuctionパッケージに含まれています。

機能コード：それは働く私のEC2インスタンス上の同じffmpegのバイナリと

Loading function 

/tmp/ffmpeg.linux64 

ok 

[Errno 2] No such file or directory: OSError 
Traceback (most recent call last): 
File "/var/task/lambda_function.py", line 112, in lambda_handler 
filenames_list = create_thumbnails(video_url) 
File "/var/task/lambda_function.py", line 77, in create_thumbnails 
get_thumb_filename(i)]) 
File "/usr/lib64/python2.7/subprocess.py", line 522, in call 
return Popen(*popenargs, **kwargs).wait() 
File "/usr/lib64/python2.7/subprocess.py", line 710, in __init__ 
errread, errwrite) 
File "/usr/lib64/python2.7/subprocess.py", line 1335, in _execute_child 
raise child_exception 
OSError: [Errno 2] No such file or directory 

私は同じsp.callを（使用する場合）：

# -*- coding: utf-8 -*- 

import stat 
import shutil 
import boto3 
import logging 
import subprocess as sp 
import os 
import threading 

thumbnail_prefix = 'thumb_' 
thumbnail_ext = '.jpg' 
time_delta = 1 
video_frames_path = 'media/videos/frames' 

print('Loading function') 
logger = logging.getLogger() 
logger.setLevel(logging.INFO) 

lambda_tmp_dir = '/tmp' # Lambda fuction can use this directory. 

# ffmpeg is stored with this script. 
# When executing ffmpeg, execute permission is requierd. 
# But Lambda source directory do not have permission to change it. 
# So move ffmpeg binary to `/tmp` and add permission. 
ffmpeg_bin = "{0}/ffmpeg.linux64".format(lambda_tmp_dir) 
shutil.copyfile('/var/task/ffmpeg.linux64', ffmpeg_bin) 

os.chmod(ffmpeg_bin, 777) 

# tried also: 
# os.chmod(ffmpeg_bin, os.stat(ffmpeg_bin).st_mode | stat.S_IEXEC) 

s3 = boto3.client('s3') 


def get_thumb_filename(num): 
    return '{prefix}{num:03d}{ext}'.format(prefix=thumbnail_prefix, num=num, ext=thumbnail_ext) 


def create_thumbnails(video_url): 
    i = 1 
    filenames_list = [] 
    filename = None 
    while i == 1 or os.path.isfile(os.path.join(os.getcwd(), get_thumb_filename(i-1))): 
     if filename: 
      filenames_list.append(filename) 
     time = time_delta * (i - 1) 
     filename = get_thumb_filename(i) 
     print(ffmpeg_bin) 
     if os.path.isfile(ffmpeg_bin): 
      print('ok') 
     sp.call(['sudo', 
       ffmpeg_bin, 
       '-ss', 
       str(time), 
       '-i', 
       video_url, 
       '-frames:v', 
       '1', 
       get_thumb_filename(i)]) 
     i += 1 
    print(filenames_list) 
    return filenames_list 


def s3_upload_file(file_path, key, bucket, acl, content_type): 
    file = open(file_path, 'r') 
    s3.put_object(
     Bucket=bucket, 
     ACL=acl, 
     Body=file, 
     Key=key, 
     ContentType=content_type 
    ) 
    logger.info("file {0} moved to {1}/{2}".format(file_path, bucket, key)) 


def s3_upload_files_in_threads(filenames_list, dir_path, bucket, s3path, acl, content_type): 
    for filename in filenames_list: 
     if os.path.isfile(os.path.join(dir_path, filename)): 
      print(os.path.join(dir_path, filename)) 
     t = threading.Thread(target=s3_upload_file, 
          args=(os.path.join(dir_path, filename), 
            '{0}/{1}'.format(s3path, filename), 
            bucket, 
            acl, 
            content_type)).start() 


def lambda_handler(event, context): 
    bucket = event['Records'][0]['s3']['bucket']['name'] 
    video_key = event['Records'][0]['s3']['object']['key'] 
    video_name = video_key.split('/')[-1].split('.')[0] 
    video_url = 'http://{0}/{1}'.format(bucket, video_key) 
    filenames_list = create_thumbnails(video_url) 
    s3_upload_files_in_threads(filenames_list, 
           os.getcwd(), 
           bucket, 
           '{0}/{1}'.format(video_frames_path, video_name), 
           'public-read', 
           'image/jpeg') 
    return 

私は次のログを取得する実行中良い。

Answer 1

ffmpegの問題ではありません。エラーはsudoが見つかりません。ラムダのインスタンスにはsudoが付いていません。なぜsudoが必要ですか？あなたは何を渡してもsp.call()に印刷できますか？