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• Révision 73219 : Reparer l’affichage du detail d’un plugin : il faut faire un ajaxReload sur tout...

  3 juin 2013, par cedric@yterium.com

  On utilise jQuery.on() pour faire de la delegation d’event au passage

• FFmpeg add #EXT-X-START to HLS m3u8 file

  25 octobre 2017, par bosboy

  I am creating a HLS live streaming event playlist (m3u8 file and the ts segments) via FFmpeg. The segments at the beginning must not be removed from the playlist (it should contain all the segments). The HTML5 video element should start playing the video at the very beginning (by default it starts somewhere in the middle if the playlist contains several segments and the end tag is not contained at the end of the playlist file). To achieve that the video starts playing at the very beginning I need to add #EXT-X-START:TIME-OFFSET=0 to the playlist file.

  Currently my FFmpeg command is the following :
  ffmpeg -i videoSrc -map 0 -f hls -hls_time 10 -hls_list_size 0 -hls_playlist_type event -hls_allow_cache 0 -hls_segment_filename testSegmented%03d.ts testSegmentedHls.m3u8.

  So my question is : How do I add #EXT-X-START:TIME-OFFSET=0 to my HLS m3u8 playlist file using FFmpeg ?

• 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))
}