Difference between revisions of "Flash DRM content"

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(some style tweaks, it is expected that the user knows how to check if a package is already installed)
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[[Category:Player]]
 
[[Category:Player]]
If you try to watch Amazon Instant Video, you may see the following error: '''''an error occurred and your player could not be updated'''''. This likely indicates that the video is protected with DRM and that the Flash Player could not perform some of the functions required to securely deliver the protected content.
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DRM content on Flash still requires HAL to play. This is apparent for example with Google Play Movies or Amazon Instant Video. If you attempt to play a DRM-protected content without HAL, you may see the following error: {{ic|an error occurred and your player could not be updated}}.
  
To deliver DRM-protected content, Flash calls several functions provided by the HAL daemon and its libraries. While Flash-based players remain popular, HAL has been deprecated and is not commonly installed on newer systems. To provide the necessary HAL functionality on such systems, you can either install the full HAL package and run the HAL daemon or install a modified HAL library 'stub' that uses the modern UDisks daemon instead.
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To deliver DRM-protected content, Flash calls several functions provided by the HAL daemon and its libraries. While Flash-based players remain popular, HAL has been deprecated and is not commonly installed on newer systems. To provide the necessary HAL functionality on such systems, you can either install the full HAL package and run the HAL daemon or install a modified HAL library "stub" that uses the modern UDisks daemon instead.
  
 
== Using the HAL package ==
 
== Using the HAL package ==
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=== Running the HAL daemon ===
 
=== Running the HAL daemon ===
  
Once you have confirmed that hal is installed (as above), start the daemon.
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The HAL daemon is managed by {{ic|hal.service}}, which can be controlled by [[systemd#Using units|systemctl]].
  
'''sysvinit:'''
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Alternatively, one can use the following script, which also takes care of [[#Remove Flash Player cached files|cleaning the cache]].
# /etc/rc.d/hal start
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'''systemd:'''
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{{bc|<nowiki>
# systemctl start hal.service
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#!/bin/bash
  
You may also wish to enable the daemon at boot, either by adding '''hal''' to your '''DAEMONS''' array in /etc/rc.conf (if using sysvinit), or by running '''systemctl enable hal.service''' as root (if running systemd).
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## written by Mark Lee <bluerider>
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## using information from <https://wiki.archlinux.org/index.php/Chromium#Google_Play_.26_Flash>
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## Start and stop Hal service on command for Google Play Movie service
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function main () {  ## run the main insertion function
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    clear-cache;  ## remove adobe cache
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    start-hal;  ## start the hal daemon
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    read -p "Press 'enter' to stop hal";  ## pause the command line with a read line
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    stop-hal;  ## stop the hal daemon
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}
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function clear-cache () {  ## remove adobe cache
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    cd ~/.adobe/Flash_Player;  ## go to Flash player user directory
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    rm -rf NativeCache AssetCache APSPrivateData2;  ## remove cache
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}
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function start-hal () {  ## start the hal daemon
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    sudo systemctl start hal.service && ( ## systemd : start hal daemon
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          echo "Started hal service..."
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) || (
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          echo "Failed to start hal service!")
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}
 +
 
 +
function stop-hal () {  ## stop the hal daemon
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sudo systemctl stop hal.service && (  ## systemd : stop hal daemon
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          echo "Stopped hal service..."
 +
    ) || (
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          echo "Failed to stop hal service!"
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    )
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}
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main;  ## run the main insertion function
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</nowiki>}}
  
 
== Using the modified libhal stub ==
 
== Using the modified libhal stub ==
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=== Running UDisks ===
 
=== Running UDisks ===
  
Since the libhal stub passes its calls to UDisks, UDisks should be running before you attempt to play DRM-protected Flash videos. To verify udisks is running using systemd:
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Since the libhal stub passes its calls to UDisks, UDisks should be running before you attempt to play DRM-protected Flash videos.
$ systemctl status udisks
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If it isn't running, run these commands to start UDisks now and enable it on future restarts:
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Make sure that {{ic|udisks.service}} is started, see [[systemd#Using units]] for details.
# systemctl start udisks
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# systemctl enable udisks
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== Remove Flash Player cached files ==
 
== Remove Flash Player cached files ==
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  $ rm -rf NativeCache AssetCache APSPrivateData2
 
  $ rm -rf NativeCache AssetCache APSPrivateData2
  
== See Also ==
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== See also ==
  
* [[udev#Running_HAL]]
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* [http://isenmann.blogspot.gr/2012/08/watching-movies-from-google-play-with.html Watching movies from Google Play on Arch Linux]

Revision as of 11:27, 29 December 2013

DRM content on Flash still requires HAL to play. This is apparent for example with Google Play Movies or Amazon Instant Video. If you attempt to play a DRM-protected content without HAL, you may see the following error: an error occurred and your player could not be updated.

To deliver DRM-protected content, Flash calls several functions provided by the HAL daemon and its libraries. While Flash-based players remain popular, HAL has been deprecated and is not commonly installed on newer systems. To provide the necessary HAL functionality on such systems, you can either install the full HAL package and run the HAL daemon or install a modified HAL library "stub" that uses the modern UDisks daemon instead.

Using the HAL package

Install the halAUR package from the AUR. You will need to install hal-infoAUR first as it is a dependency for halAUR.

Running the HAL daemon

The HAL daemon is managed by hal.service, which can be controlled by systemctl.

Alternatively, one can use the following script, which also takes care of cleaning the cache.

#!/bin/bash

## written by Mark Lee <bluerider>
## using information from <https://wiki.archlinux.org/index.php/Chromium#Google_Play_.26_Flash>

## Start and stop Hal service on command for Google Play Movie service

function main () {  ## run the main insertion function
     clear-cache;  ## remove adobe cache
     start-hal;  ## start the hal daemon
     read -p "Press 'enter' to stop hal";  ## pause the command line with a read line
     stop-hal;  ## stop the hal daemon
}

function clear-cache () {  ## remove adobe cache
     cd ~/.adobe/Flash_Player;  ## go to Flash player user directory
     rm -rf NativeCache AssetCache APSPrivateData2;  ## remove cache
}

function start-hal () {  ## start the hal daemon
     sudo systemctl start hal.service && ( ## systemd : start hal daemon
          echo "Started hal service..."
) || (
          echo "Failed to start hal service!") 
}

function stop-hal () {  ## stop the hal daemon
sudo systemctl stop hal.service && (  ## systemd : stop hal daemon
          echo "Stopped hal service..."
     ) || (
          echo "Failed to stop hal service!"
     )
}

main;  ## run the main insertion function

Using the modified libhal stub

As an alternative to installing all of HAL, you can install a modified version of the libhal library from the AUR that uses the modern UDisks daemon instead of the deprecated HAL. Note that this libhal provides just enough of the HAL functionality to meet Flash's needs for copy-protected delivery: if you have other programs that require HAL, this stub probably won't satisfy them and you should use the full hal package instead.

Installing UDisks and hal-flash

You will need to install hal-flashAUR from the AUR, which relies on UDisks.

Running UDisks

Since the libhal stub passes its calls to UDisks, UDisks should be running before you attempt to play DRM-protected Flash videos.

Make sure that udisks.service is started, see systemd#Using units for details.

Remove Flash Player cached files

To get a fresh start after installing the package(s), remove some Flash Player cached files:

$ cd ~/.adobe/Flash_Player
$ rm -rf NativeCache AssetCache APSPrivateData2

See also