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• Our release signature has changed

  8 mars 2022, par justin — Security

  We have been cryptographically signing Matomo releases since 2014, so you can verify the signature of the release you downloaded. Up until Matomo 4.8.0 releases were signed with Matthieu Aubry’s personal signature. In Matomo 4.8.0 we made some improvements to our release systems including automating the release builds. As part of these improvements it makes sense to now use a Matomo signature, which means a few changes are required for verifying releases. There is no security issue around the previous key, which can still be used to verify older release builds.

  There is a new signature here : builds.matomo.org/signature.asc. You can use this signature according to our updated instructions to verify releases for Matomo version 4.8.0 and newer. You will need to import this signature to verify new releases.

  If you want to verify the signature of a release prior to Matomo 4.8.0 you can now find Matthieu’s signature here : builds.matomo.org/signature-pre-4.8.0.asc, and the same instructions apply. If you already imported Matthieu’s signature, you won’t need to do this again.

• ffmpeg Padding & Delay to Audio File Accurately

  14 avril 2022, par Ry-

  Recently I've been doing a personal project which does entail a little bit of
audio handling but I have noticed that the commands that I am using to modify
don't have a 1:1 correlation in the resulting file leading to it being fairly
offbeat (Note that this program is error sensitive).

  


  All I need to do is accurately add Padding to the start of an audio file, or
jumpforward to some point in the song using an Offset/Delay value. The values
are strictly accurate such as 0.13149s however accuracy passed the third radix
is pretty redundant since 'nobody' should be able to notice it.

  


  Here is an example of one issue:

    [Input File Info] // This is a test case/correct values
    Supposed to start at : 0.875
    Originally started at: 1.190
    Offset Value         : -0.315
    Difference           : 1.190 - 0.875 = 0.315


  


      // Audio file offset attempt (FAIL)
    FFMPEG Command:  
        ffmpeg -y -i "..." -ss 0.315 -c copy -map 0 "..."
        
    [Output File Info]
    Start Time Beat         : 0.766 
    Start Time Beat Audacity: 0.766
    Resulting Error         : 0.106


  


  What I want to know is if someone knows a better way to get 1:1 accuracy from
the command or atleast as close to it as possible. I don't often use ffmpeg so
I probably am missing vital information (I did my best googling ok :) but to
this I also wouldn't abstain from using a dedicated audio library for the
language I'm writing the program in (Java).

  


  I probably should mention that I have been using:
    ffmpeg -y -i "..." -af "adelay=DELAY" "..."

to add the padding but I haven't really gotten around to testing audio files
that require this yet so I don't know if its broken/inaccurate.


  


• PHP passthru with proper child process closing

  6 juin 2022, par Bluchip Studio

  I am currently using the code below to try and restream a hls live stream via php the reason for this is php is all i have access to on the system i am using i can not use or install anything else and i like to watch my home tv in my current location my hls streams come direct from my own tbs octo encoder at my home so i know thats all good.

  


  my issue is that the stream randomly stops after around 30-50 seconds of playing it can be restarted no problem so i know the reading of the stream is not the issue.

  


  also when i disconnect and stop watching the stream the ffmpeg / streamlink processes do not stop and stay running in the back ground this has led to me getting some rather frustrating emails from the owner of the system i am using

  


  does anyone know if this is the best way to handel this task and how to possibly close the child processes created by passthru ?

  


  PS : I know all caps is not the correct way to code in production but as this is my personal code and it does not effect the way in witch the code is run it makes it so much easier for me to read being dyslexic !

  


  <?php

ini_set('output_buffering', '0');
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

set_time_limit(0);
ob_implicit_flush();

include './core/functions.php';

$PROCESS_URL = 'HTTP STREM URL GOES HERE';
    
$ENCODING_TYPE = 'mpegts';
    
$ENCODING_SETTINGS = 'streamlink '. $PROCESS_URL . ' best -O | '. FFMPEG .
    ' -threads 0' .
    ' -re' .
    ' -probesize 9000000'.
    ' -analyzeduration 9000000'.
    ' -i pipe:0' .
    ' -c:v copy -c:a copy' .
    ' -tune zerolatency' .
    ' -preset ultrafast' .
    ' -fflags +genpts' .
    ' -mpegts_flags initial_discontinuity' .
    ' -f ' . $ENCODING_TYPE . 
    ' pipe:1 2>' . LOG_DIRECTORY . '/' . MD5($PROCESS_URL) . '_ffmpeg.txt';

header('Content-type: application/octet-stream');
header('X-Accel-Buffering: no');

@passthru($ENCODING_SETTINGS);

?>