X-Git-Url: https://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/21be625c3409a4769003f49df156f2ca4636f47e..b3e82c9942ba7127eeab00c5f54feffd2a290c48:/blog/index.html diff --git a/blog/index.html b/blog/index.html index 49553b16ec..f9015d50ad 100644 --- a/blog/index.html +++ b/blog/index.html @@ -19,6 +19,61 @@ +
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Half the Coverity issues in Gnash fixed in the next release
+
29th April 2014
+

I've been following the Gnash +project for quite a while now. It is a free software +implementation of Adobe Flash, both a standalone player and a browser +plugin. Gnash implement support for the AVM1 format (and not the +newer AVM2 format - see +Lightspark for that one), +allowing several flash based sites to work. Thanks to the friendly +developers at Youtube, it also work with Youtube videos, because the +Javascript code at Youtube detect Gnash and serve a AVM1 player to +those users. :) Would be great if someone found time to implement AVM2 +support, but it has not happened yet. If you install both Lightspark +and Gnash, Lightspark will invoke Gnash if it find a AVM1 flash file, +so you can get both handled as free software. Unfortunately, +Lightspark so far only implement a small subset of AVM2, and many +sites do not work yet.

+ +

A few months ago, I started looking at +Coverity, the static source +checker used to find heaps and heaps of bugs in free software (thanks +to the donation of a scanning service to free software projects by the +company developing this non-free code checker), and Gnash was one of +the projects I decided to check out. Coverity is able to find lock +errors, memory errors, dead code and more. A few days ago they even +extended it to also be able to find the heartbleed bug in OpenSSL. +There are heaps of checks being done on the instrumented code, and the +amount of bogus warnings is quite low compared to the other static +code checkers I have tested over the years.

+ +

Since a few weeks ago, I've been working with the other Gnash +developers squashing bugs discovered by Coverity. I was quite happy +today when I checked the current status and saw that of the 777 issues +detected so far, 374 are marked as fixed. This make me confident that +the next Gnash release will be more stable and more dependable than +the previous one. Most of the reported issues were and are in the +test suite, but it also found a few in the rest of the code.

+ +

If you want to help out, you find us on +the +gnash-dev mailing list and on +the #gnash channel on +irc.freenode.net IRC server.

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+ + + Tags: english, multimedia, video, web. + + +
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Install hardware dependent packages using tasksel (Isenkram 0.7)
23rd April 2014
@@ -966,61 +1021,6 @@ to set up?

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Video DVD reader library / python-dvdvideo - nice free software
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21st March 2014
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Keeping your DVD collection safe from scratches and curious -children fingers while still having it available when you want to see a -movie is not straight forward. My preferred method at the moment is -to store a full copy of the ISO on a hard drive, and use VLC, Popcorn -Hour or other useful players to view the resulting file. This way the -subtitles and bonus material are still available and using the ISO is -just like inserting the original DVD record in the DVD player.

- -

Earlier I used dd for taking security copies, but it do not handle -DVDs giving read errors (which are quite a few of them). I've also -tried using -dvdbackup -and genisoimage, but these days I use the marvellous python library -and program -python-dvdvideo -written by Bastian Blank. It is -in Debian -already and the binary package name is python3-dvdvideo. Instead -of trying to read every block from the DVD, it parses the file -structure and figure out which block on the DVD is actually in used, -and only read those blocks from the DVD. This work surprisingly well, -and I have been able to almost backup my entire DVD collection using -this method.

- -

So far, python-dvdvideo have failed on between 10 and -20 DVDs, which is a small fraction of my collection. The most common -problem is -DVDs -using UTF-16 instead of UTF-8 characters, which according to -Bastian is against the DVD specification (and seem to cause some -players to fail too). A rarer problem is what seem to be inconsistent -DVD structures, as the python library -claim -there is a overlap between objects. An equally rare problem claim -some -value is out of range. No idea what is going on there. I wish I -knew enough about the DVD format to fix these, to ensure my movie -collection will stay with me in the future.

- -

So, if you need to keep your DVDs safe, back them up using -python-dvdvideo. :)

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- - - Tags: english, multimedia, opphavsrett, video. - - -
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