Category Archives: youtube

Two New Videos: SuperPages and NanoBSD

Thanks to Kirk McKusick, I'm happy to announce two new fully edited high quality videos from BSDCan 2011 in the BSD Conferences YouTube channel. I've also created a new playlist for the BSDCan 2011 videos.

The first talk is "Superpages in FreeBSD" by McKusick, and it describes the addition of superpage support to the FreeBSD 8 kernel on the Intel PC architecture. Superpages aggregate together standard-sized hardware pages into much larger "superpages". Each superpage requires only one entry in the page table replacing the numerous entries used by the standard-sized hardware pages.



The second talk is "Updates from NanoBSD: FreeNAS drives NanoBSD development" from Warner Losh, and it describes the basics of NanoBSD and how FreeNAS moved over to NanoBSD.



We now have 108 high-quality videos in the BSD Conferences channel. These videos have been watched in aggregate over 400,000 times, and our most popular video remains McKusick's FreeBSD Kernel Internals Lecture.

As a reminder, this channel was setup specifically for the BSD technical community and does not have the standard limitations on video size for other types of YouTube uploads. If you have additional video content from a conference, presentation, or class about BSD Unix please get in touch and I'd be happy to help you publish the content here.

MeetBSD 2010 Videos in HD on YouTube

Thanks to Tomasz Dudzisz we now have 14 videos from MeetBSD 2010 in Poland. Tomasz has created a playlist for the BSD Conferences YouTube channel, or you can select a video directly from the list below. These videos are all in HD quality and most are in English and a few are in Polish. Thanks Tomasz and the MeetBSD organizers for being so organized with the video recordings again this year.
  • Dru Lavigne - Update on BSD Certification
  • Hans Peter Selasky - The new USB stack in FreeBSD
  • Jakub Klama - FreeBSD on DaVinci DMSoC (polish)
  • Jan Srzednicki - What ideas can FreeBSD borrow from AIX?
  • Attilio Rao - The VFS/vnode interface in the FreeBSD kernel
  • Marko Zec - Network emulation using the virtualized network stack in FreeBSD
  • PaweÅ‚ Jakub Dawidek - HAST -- Highly Available storage for FreeBSD (polish)
  • PaweÅ‚ Jakub Dawidek - HAST -- Highly Available storage for FreeBSD (questions, polish)
  • Nikolay Aleksandrov - FreeBSD-based solution for Internet traffic managementSÅ‚awek Å»ak - NoSQL
  • Ramon Tancinco - meetBSD 2010 Welcome Intro
  • Martin Matuska - mfsBSD
  • Dmitri Epshtein - Advances in Embedded ARM processors, for performance driven applications
  • Warner Losh - Using FreeBSD in a Commercial Setting

    • MeetBSD 2010 Videos in HD on YouTube

    Thanks to Tomasz Dudzisz we now have 14 videos from MeetBSD 2010 in Poland. Tomasz has created a playlist for the BSD Conferences YouTube channel, or you can select a video directly from the list below. These videos are all in HD quality and most are in English and a few are in Polish. Thanks Tomasz and the MeetBSD organizers for being so organized with the video recordings again this year.

  • Dru Lavigne - Update on BSD Certification
  • Hans Peter Selasky - The new USB stack in FreeBSD
  • Jakub Klama - FreeBSD on DaVinci DMSoC (polish)
  • Jan Srzednicki - What ideas can FreeBSD borrow from AIX?
  • Attilio Rao - The VFS/vnode interface in the FreeBSD kernel
  • Marko Zec - Network emulation using the virtualized network stack in FreeBSD
  • PaweÅ‚ Jakub Dawidek - HAST -- Highly Available storage for FreeBSD (polish)
  • PaweÅ‚ Jakub Dawidek - HAST -- Highly Available storage for FreeBSD (questions, polish)
  • Nikolay Aleksandrov - FreeBSD-based solution for Internet traffic management
    Sławek Żak - NoSQL
  • Ramon Tancinco - meetBSD 2010 Welcome Intro
  • Martin Matuska - mfsBSD
  • Dmitri Epshtein - Advances in Embedded ARM processors, for performance driven applications
  • Warner Losh - Using FreeBSD in a Commercial Setting

    • AsiaBSDCon 2010 Videos

    The videos from AsiaBSDCon 2010 are now available on the BSD Conferences YouTube channel. The full list of 17 AsiaBSDCon videos includes:Thanks Hiroki Sato and the other organizers of AsiaBSDCon for running a successful conference and uploading these videos. Some of these videos were previously available on ustream but are not currently accessible there. The YouTube channel provides automatic machine generated captions in ~50 languages, fast streaming, and a total of over 90 videos from conferences over the past ~3 years.

    AsiaBSDCon 2010 Videos

    The videos from AsiaBSDCon 2010 are now available on the BSD Conferences YouTube channel. The full list of 17 AsiaBSDCon videos includes:



    Thanks Hiroki Sato and the other organizers of AsiaBSDCon for running a successful conference and uploading these videos. Some of these videos were previously available on ustream but are not currently accessible there. The YouTube channel provides automatic machine generated captions in ~50 languages, fast streaming, and a total of over 90 videos from conferences over the past ~3 years.

    FreeBSD Lectures Captioning Project Complete

    Murray Stokely has completed his captioning project, which was funded by the FreeBSD Foundation, and provides the following update:

    A pilot project to improve the machine generated captions of technical conference lectures from the BSD Conferences YouTube channel has been completed. The 73 videos in this channel have been viewed over 200,000 times since the channel launched in late 2008, and the addition of human-edited transcripts to some of our most popular videos makes this content more accessible to people around the world.

    In addition to the benefits to the hearing impaired, captions are very useful for international viewers as well as for the improved discoverability of this content by search engines. The improved quality of the English language transcripts also improves the quality of the automated translation of the captions into over 45 different languages. It is also now possible to search for words and phrases in the audio transcripts and get a link directly to videos that contain spoken content of that word or phrase.

    For example, try searching for a famous line from one of Dr. Kirk McKusick's FreeBSD Kernel Internal Lectures. The above link will take you to the Google Video Search Result page where one of Dr. McKusick's lectures containing the phrase as long as dinosaurs and mainframes is the first result, along with a snippet of the transcript from his lecture, just as you would see the snippet from text content on a web page. A dozen of our most popular videos of FreeBSD technical content are now captioned and fully indexed allowing users to search for very technical terms and get access to lecture material from BSD Conferences.

    The captions were improved by two passes of human editing paid for hire through Amazon Mechanical Turk.

    Improved Conference Captions from Amazon Mechanical Turk (2)

    After my initial experiments last month, I applied to the FreeBSD Foundation for funds to pay for additional human editing of the YouTube machine generated transcripts. The screenshot on the left shows an example HIT (Human Intelligence Task) available on Amazon Mechanical Turk.The task description on the left is based on a template I created with three variables: $VIDEO_URL, $VIDEO_TITLE, and $CAPTIONS_URL. New HITs are then created by uploading a CSV file with three columns for each of those variables, e.g.
    VIDEO_URL,VIDEO_TITLE,CAPTIONS_URLhttp://www.youtube.com/watch?v=mMmbjJI5su0,"BSD v. GPL, Jason Dixon, NYCBSDCon 2008",http://people.FreeBSD.org/~murray/improved-captions-bsdvsgpl.sbvhttp://www.youtube.com/watch?v=Pe8LdJpBGJ4,"Isolating Cluster Jobs for Performance and Predictability, Brooks Davis (DCBSDCon 2009",http://people.FreeBSD.org/~murray/improved-captions-isolatingcluster.sbv
    Using this method I created 12 HITs for the first pass of editing for which I offered between $9 and $14 per video. A slightly modified template with the same three variables was used to pay ~$7 per video for a second pass to further improve the transcripts improved in the first pass. The template has gotten more detailed over the past month in response to all of the minor ways that workers submitted less than perfect transcripts. The actual SBV file format used by YouTube captions is not formally specified anywhere as far as I can tell, but the 60 character maximum width and simple format can be verified in submitted transcripts with a few emacs macros.The transcript files have been checked into the FreeBSD Doc CVS Repository. The full list of videos with human-edited English language transcripts is:

    Improved Conference Captions from Amazon Mechanical Turk (2)


    After my initial experiments last month, I applied to the FreeBSD Foundation for funds to pay for additional human editing of the YouTube machine generated transcripts. The screenshot on the left shows an example HIT (Human Intelligence Task) available on Amazon Mechanical Turk.

    The task description on the left is based on a template I created with three variables: $VIDEO_URL, $VIDEO_TITLE, and $CAPTIONS_URL. New HITs are then created by uploading a CSV file with three columns for each of those variables, e.g.

    VIDEO_URL,VIDEO_TITLE,CAPTIONS_URL
    http://www.youtube.com/watch?v=mMmbjJI5su0,"BSD v. GPL, Jason Dixon, NYCBSDCon 2008",http://people.FreeBSD.org/~murray/improved-captions-bsdvsgpl.sbv
    http://www.youtube.com/watch?v=Pe8LdJpBGJ4,"Isolating Cluster Jobs for Performance and Predictability, Brooks Davis (DCBSDCon 2009",http://people.FreeBSD.org/~murray/improved-captions-isolatingcluster.sbv


    Using this method I created 12 HITs for the first pass of editing for which I offered between $9 and $14 per video. A slightly modified template with the same three variables was used to pay ~$7 per video for a second pass to further improve the transcripts improved in the first pass.

    The template has gotten more detailed over the past month in response to all of the minor ways that workers submitted less than perfect transcripts. The actual SBV file format used by YouTube captions is not formally specified anywhere as far as I can tell, but the 60 character maximum width and simple format can be verified in submitted transcripts with a few emacs macros.

    The transcript files have been checked into the FreeBSD Doc CVS Repository. The full list of videos with human-edited English language transcripts is:

    50th BSD Video Posted: All DCBSDCon ’09 Videos Live

    Jason Dixon has made available the last 4 videos from DCBSDCon 2009. The last video marks the 50th video uploaded to the BSDConferences YouTube channel. This channel was created less than 5 months ago and now has 924 subscribers from authenticated YouTube users, and the videos have been viewed over 76,000 times by users from around the world (includes partial views).The newest 4 videos are :The average number of daily views is around 500, with significant spikes above 1,500 in the days after a popular new video is announced:And the top 10 videos sorted by views (biased towards older videos that have been available longer) are :

    50th BSD Video Posted: All DCBSDCon ’09 Videos Live

    Jason Dixon has made available the last 4 videos from DCBSDCon 2009. The last video marks the 50th video uploaded to the BSDConferences YouTube channel. This channel was created less than 5 months ago and now has 924 subscribers from authenticated YouTube users, and the videos have been viewed over 76,000 times by users from around the world (includes partial views).

    The newest 4 videos are :
    The average number of daily views is around 500, with significant spikes above 1,500 in the days after a popular new video is announced:
    And the top 10 videos sorted by views (biased towards older videos that have been available longer) are :

    FreeBSD Kernel Internals Lecture Posted

    The first lecture from Kirk McKusick's full length FreeBSD Kernel Internals course has been posted to the BSD Conferences channel on YouTube. It's been about 10 years since I first took a shortened version of this course at FreeBSDCon 1999, and only a few years since I took the follow up kernel code reading course in Berkeley, and I highly recommend this unique resource to others.This makes the 24th video uploaded to the BSD Conferences channel since I created it just over a month ago. Thanks to Julian Elisher, Jason Dixon, Tomasz Dudzisz, and Kirk McKusick for uploading the conference videos and for contributing to our growing page of tips about video production and publishing on the FreeBSD Wiki.As of this writing we have 644 unique subscribers to the channel and approximately 400 daily views of these videos. To date the most popular videos have been Kris Kennaway speaking about the New features in FreeBSD 7 at MeetBSD 2007, and Jason Dixon's tongue-in-cheek BSD is Dying talk at NYCBSDCon 2006. Note to conference organizers: high level talks about the new features, or talks by speakers as entertaining as Jason Dixon are likely to be well received. The YouTube analytics to the right show the top 10 most popular videos from the channel as well as some demographic information.

    FreeBSD Kernel Internals Lecture Posted

    The first lecture from Kirk McKusick's full length FreeBSD Kernel Internals course has been posted to the BSD Conferences channel on YouTube. It's been about 10 years since I first took a shortened version of this course at FreeBSDCon 1999, and only a few years since I took the follow up kernel code reading course in Berkeley, and I highly recommend this unique resource to others.



    This makes the 24th video uploaded to the BSD Conferences channel since I created it just over a month ago. Thanks to Julian Elisher, Jason Dixon, Tomasz Dudzisz, and Kirk McKusick for uploading the conference videos and for contributing to our growing page of tips about video production and publishing on the FreeBSD Wiki.

    As of this writing we have 644 unique subscribers to the channel and approximately 400 daily views of these videos. To date the most popular videos have been Kris Kennaway speaking about the New features in FreeBSD 7 at MeetBSD 2007, and Jason Dixon's tongue-in-cheek BSD is Dying talk at NYCBSDCon 2006. Note to conference organizers: high level talks about the new features, or talks by speakers as entertaining as Jason Dixon are likely to be well received. The YouTube analytics to the right show the top 10 most popular videos from the channel as well as some demographic information.