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• ffmpeg file conversion AWS Lamda

  10 avril 2021, par eartoolbox

  I want a .webm file to be converted to a .wav file after it hits my S3 bucket. I followed this tutorial and tried to adapt it from my use case using the .webm -> .wav ffmpeg command described here.

  


  My AWS Lambda function generally works, in that when my .webm file hits the source bucket, it is converted to .wav and ends up in the destination bucket. However, the resulting file .wav is always 0 bytes (though the .webm not, including the appropriate audio). Did I adapt the code wrong ? I only changed the ffmpeg_cmd line from the first link.

  


  import json
import os
import subprocess
import shlex
import boto3

S3_DESTINATION_BUCKET = "hmtm-out"
SIGNED_URL_TIMEOUT = 60

def lambda_handler(event, context):

    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 + ".wav"

    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 + "\" -c:a pcm_f32le " + s3_destination_filename + " -"
    
    
    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)

    return {
        'statusCode': 200,
        'body': json.dumps('Processing complete successfully')
    }
 


  


• Evolution #4080 : Raccourci puce : se débarasser de l’image

  1er octobre 2018

  Je vote pour le caractère
  https://unicode-table.com/fr/2023/

  Voici un test chez moi en local sur SPIP 3.2, la dist et Firefox Windows (bref 100% vanille)

• Cannot stream video from VLC docker

  4 avril 2023, par Snake Eyes

  I have Dockerfile :

  


  FROM fedora:34

ARG VLC_UID="1000"
ARG VLC_GID="1000"

ENV HOME="/data"


RUN groupadd -g "${VLC_GID}" vlc && \
    useradd -m -d /data -s /bin/sh -u "${VLC_UID}" -g "${VLC_GID}" vlc && \
    dnf upgrade -y && \
    rpm -ivh "https://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-34.noarch.rpm" && \
    dnf upgrade -y && \
    dnf install -y vlc && \
    dnf install -y libaacs libbdplus && \
    dnf install -y libbluray-bdj && \
    dnf clean all

USER "vlc"

WORKDIR "/data"

VOLUME ["/data"]

ENTRYPOINT ["/usr/bin/cvlc"]


  


  And then run :

  


  docker run -d -v "d:\path":/data -p 8787:8787 myrepo/myvlc:v1 file:///data/Sample.mkv --sout '#transcode {vcodec=h264,acodec=mp3,samplerate=44100}:std{access=http,mux=ffmpeg{mux=flv},dst=0.0.0.0:8787/stream.flv}'


  


  I get error :

  


  2023-04-04 12:19:11 [000055933c090060] vlcpulse audio output error: PulseAudio server connection failure: Connection refused
2023-04-04 12:19:11 [000055933c09d680] dbus interface error: Failed to connect to the D-Bus session daemon: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11
2023-04-04 12:19:11 [000055933c09d680] main interface error: no suitable interface module
2023-04-04 12:19:11 [000055933bf26ad0] main libvlc error: interface "dbus,none" initialization failed
2023-04-04 12:19:11 [000055933c08d7a0] main interface error: no suitable interface module
2023-04-04 12:19:11 [000055933bf26ad0] main libvlc error: interface "globalhotkeys,none" initialization failed
2023-04-04 12:19:11 [000055933c08d7a0] dummy interface: using the dummy interface module...
2023-04-04 12:19:11 [00007f3b84001250] stream_out_standard stream out error: no mux specified or found by extension
2023-04-04 12:19:11 [00007f3b84000f30] main stream output error: stream chain failed for `standard{mux="",access="",dst="'#transcode"}'
2023-04-04 12:19:11 [00007f3b90000c80] main input error: cannot start stream output instance, aborting
2023-04-04 12:19:11 [00007f3b7c001990] stream_out_standard stream out error: no mux specified or found by extension
2023-04-04 12:19:11 [00007f3b7c001690] main stream output error: stream chain failed for `standard{mux="",access="",dst="'#transcode"}'
2023-04-04 12:19:11 [00007f3b90000c80] main input error: cannot start stream output instance, aborting


  


  I mention that I'm using cvlc and I can't stream that mkv file.

  


  I tried as well --sout '#transcode{scodec=none}:http{mux=ffmpeg{mux=flv},dst=:8787/}' but same errors.

  


  How can I solve it ?