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• I want to print HLS files using ffmpeg in aws lambda (python)

  14 avril 2021, par 최우선

  I implemented it through the link(https://aws.amazon.com/ko/blogs/media/processing-user-generated-content-using-aws-lambda-and-ffmpeg/) here, and it works well.

  


  s3_source_bucket = event['Records'][0]['s3']['bucket']['name']
s3_source_key = event['Records'][0]['s3']['object']['key']

s3_source_basename = os.path.splitext(os.path.basename(s3_source_key))[0]
s3_destination_filename = s3_source_basename + ".m3u8"

s3_client = boto3.client('s3')
s3_source_signed_url = s3_client.generate_presigned_url('get_object',
    Params={'Bucket': s3_source_bucket, 'Key': s3_source_key},
    ExpiresIn=SIGNED_URL_TIMEOUT)


ffmpeg_cmd = "/opt/bin/ffmpeg -i \"" + s3_source_signed_url + "\" -codec: copy -start_number 0 -hls_time 10 -hls_list_size 0 -f hls -"
command1 = shlex.split(ffmpeg_cmd)
p1 = subprocess.run(command1, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

resp = s3_client.put_object(Body=p1.stdout, Bucket=S3_DESTINATION_BUCKET, Key=s3_destination_filename)


  


  However, the actual output through ffmpeg is multiple files. For example test.m3u8, test0.ts, test1.ts .....

  


  But when I print p1.stdout, it looks like multiple files (test.m3u8,test0.ts....) are merged into one file.

  


  Is there a way to get the actual output multiple files (test.m3u8,test0.ts......) from p1.stdout ? Please help.

  


• ffprobe only shows a single stream

  19 novembre 2018, par marchaos

  I’ve got a webcam that is capable of 1080p. Under windows I can choose a 1080p 2mbps and all works well. When using ffprobe, it only shows a single 640x480 stream. If you use ffmpeg copy, it only records at 640x480.

  Is there a way to get it to record at the full 1080p ?

• AWS Lambda - FFmpeg to extract frames doesn't write anything

  7 avril 2024, par Stormsson

  I have a lambda with a ffmpeg layer on it.

  


  The command i want to use is basically

  


  ffmpeg -i video.mp4 -qscale:v 2 -vf fps=8 '%04d.jpg'


  


  so it has an input file, and creates 8 frames per second in the same folder

  


  This code seems to do everything except writing the files, what am I missing ?

  


  import ...
SIGNED_URL_TIMEOUT = 60
FPS_SAMPLES = 8

def lambda_handler(event, context):
    # Set up logging.
    logger = logging.getLogger(__name__)

    s3_client = boto3.client('s3')

    s3_source_bucket = event['Records'][0]['s3']['bucket']['name']
    s3_source_key = event['Records'][0]['s3']['object']['key']

    s3_source_basename = os.path.splitext(os.path.basename(s3_source_key))[0]

    logger.info( "bucket: %s, key: %s, basename: %s",s3_source_bucket, s3_source_key, s3_source_basename)

    s3_source_signed_url = s3_client.generate_presigned_url('get_object',
    Params={'Bucket': s3_source_bucket, 'Key': s3_source_key},
    ExpiresIn=SIGNED_URL_TIMEOUT)

    with tempfile.TemporaryDirectory() as tmpdir:
        os.chdir(tmpdir) # change the current folder to that one (current one is in     os.getcwd())
        cwd = os.getcwd()
        ffmpeg_cmd = "/opt/bin/ffmpeg -i \"" + s3_source_signed_url + "\" -qscale:v 2 -vf fps="+str(FPS_SAMPLES)+" "+ cwd + "/'%04d.jpg'"
    print("COMMAND: "+ffmpeg_cmd)
    
        command1 = shlex.split(ffmpeg_cmd)
        p1 = subprocess.run(command1, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

        # List all files and directories in the current directory
        contents = os.listdir(cwd)
    
        # Print the contents
        print(f"Contents of {cwd}:")
        for item in contents:
            print(item) # <--- NOthing here...

   
return {
    'statusCode': 200,
    'body': json.dumps("bucket: %s, key: %s, basename: %s" % (s3_source_bucket, s3_source_key, s3_source_basename))
}