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• fatal Error Issues - jhotovy's version of android-ffmpeg-x264 - github.com/jhotovy/android-ffmpeg.git

  3 août 2012, par user1545779

  The following is the output for issuing init-submodules.sh. I keep receiving this

  error:fatal error:
  
      Unable to checkout '15e02184e136e47ecff01bf56aca
  
      The49d8e2646fb4&#39; in submodule path &#39;Project/jni/ffmpeg&#39;<br />

  Has anyone run jhotovy's version of halfninja's code successfully so far ? Any help in resolving this issue will be greatly appreciated
  

  My screen output :

      gipsyblues@android-general:~/android-ffmpeg$ ./init-submodules.sh <br />
  
      ls: cannot access ./jni/ffmpeg/*: No such file or directory<br />
  
      Submodule &#39;ffmpeg&#39; (git://git.videolan.org/ffmpeg.git) registered for path   Project/jni     /ffmpeg&#39;<br />
  
      Submodule &#39;x264&#39; (git://git.videolan.org/x264.git) registered for path &#39;Project/jni    /x264&#39;<br />
  
      user.name=xxxxxxx <br />
  
      user.email=yyyyyyy <br />
  
      core.repositoryformatversion=0<br />
  
      core.filemode=true<br />
  
      core.bare=false<br />
  
      core.logallrefupdates=true<br />
  
      remote.origin.fetch=+refs/heads/*:refs/remotes/origin/*<br />
  
      remote.origin.url=git://github.com/jhotovy/android-ffmpeg.git
  
      branch.master.remote=origin<br />
  
      branch.master.merge=refs/heads/master<br />
  
      submodule.ffmpeg.url=git://git.videolan.org/ffmpeg.git<br />
  
      submodule.x264.url=git://git.videolan.org/x264.git<br />
  
      Initialized empty Git repository in /home/gipsyblues/android-ffmpeg/Project/jni/ffmpeg  /.git/<br />
  
      remote: Counting objects: 237417, done.<br />
  
      remote: Compressing objects: 100% (57251/57251), done.<br />
  
      remote: Total 237417 (delta 186957), reused 228690 (delta 179782)<br />
  
      Receiving objects: 100% (237417/237417), 59.89 MiB | 5.22 MiB/s, done.<br />
  
      Resolving deltas: 100% (186957/186957), done.<br />
  
      fatal: reference is not a tree: 15e02184e136e47ecff01bf56aca49d8e2646fb4<br />
  
      Unable to checkout &#39;15e02184e136e47ecff01bf56aca49d8e2646fb4&#39; in submodule path    &#39;Project/jni/ffmpeg&#39;<br />
  
     gipsyblues@android-general:~/android-ffmpeg$ <br />

  I have successfully run the original halfninja version which is also at githuib.com/halfninja/android-ffmpeg-x264.<br> I have searched all over the Internet and i am not finding any reference to this issue. Anyone had any success with that implementation

• Strange error [adding watermark to flv video with ffmpeg on linux centos 6]

  20 juillet 2012, par igor

  I have tried to do the job with following code :

  ffmpeg -i /home/igordr/video.flv -vf "movie=/home/igordr/wm.jpg [watermark]; [in][watermark] overlay=main_w/2-overlay_w/2:main_h/2-overlay_h/2 [out]" /home/igordr/outputvideo.flv

  Also tried :

  ffmpeg -i /home/igordr/video.flv -b:a 300k -ar 22050 -t 10 -f flv -s 352x288 -vf "movie = /home/igordr/wm.png [watermark]; [in][watermark] overlay =0:0 [out]" /home/igordr/out.flv

  I get errors :

  Unrecognized option 'vf'
  
  
  
  Unrecognized option 'b:a'

  Also, I am interested, how I can add just one big image, before video starts, without watermark, and does it possible ?

  How can i check ffmpeg version, and install new one if it's old ?

• Winamp and the March of GUI

  1er juillet 2012, par Multimedia Mike — General, ars technica, gui, user interface, winamp

  Ars Technica recently published a 15-year retrospective on the venerable Winamp multimedia player, prompting bouts of nostalgia and revelations of "Huh ? That program is still around ?" from many readers. I was among them.

  
  
  

  I remember first using Winamp in 1997. I remember finding a few of these new files called MP3s online and being able to play the first 20 seconds using the official Fraunhofer Windows player— full playback required the fully licensed version. Then I searched for another player and came up with Winamp. The first version I ever used was v1.05 in the summer of 1997. I remember checking the website often for updates and trying out every single one. I can’t imagine doing that nowadays— programs need to auto-update themselves (which Winamp probably does now ; I can’t recall the last time I used the program).

  Video Underdog
  The last time Winamp came up on my radar was early in 2003 when a new version came with support for a custom, proprietary multimedia audio/video format called Nullsoft Video (NSV). I remember the timeframe because the date is indicated in the earliest revision of my NSV spec document (back when I was maintaining such docs in a series of plaintext files). This was cobbled together from details I and others in the open source multimedia community sorted out from sample files. It was missing quite a few details, though.

  Then, Winamp founder Justin Frankel — introduced through a colleague on the xine team — emailed me his official NSV format and told me I was free to incorporate details into my document just as long as it wasn’t obvious that I had the official spec. This put me in an obnoxious position of trying to incorporate details which would have been very difficult to reverse engineer without the official doc. I think I coped with the situation by never really getting around to updating my doc in any meaningful way. Then, one day, the official spec was released to the world anyway, and it is now mirrored here at multimedia.cx.

  I don’t think the format ever really caught on in any meaningful way, so not a big deal. (Anytime I say that about a format, I always learn it saw huge adoption is some small but vocal community.)

  What’s Wrong With This Picture ?
  What I really wanted to discuss in this post was the matter of graphical user interfaces and how they have changed in the last 15 years.
  
  I still remember when I first downloaded Winamp v1.05 and tried it on my Windows machine at the time. Indignantly, the first thought I had was, "What makes this program think it’s so special that it’s allowed to violate the user interface conventions put forth by the rest of the desktop ?" All of the Windows programs followed a standard set of user interface patterns and had a consistent look and feel... and then Winamp came along and felt it could violate all those conventions.

  I guess I let the program get away with it because it was either that or only play 20-second clips from the unregistered Fraunhofer player. Though incredibly sterile by comparison, the Fraunhofer player, it should be noted, followed Windows UI guidelines to the letter.

  As the summer of 1997 progressed and more Winamp versions were released, eventually one came out (I think it was v1.6 or so) that supported skins. I was excited because there was a skin that made the program look like a proper Windows program— at least if you used the default Windows color scheme, and had all of your fonts a certain type and size.

  Skins were implemented by packaging together a set of BMP images to overlay on various UI elements. I immediately saw a number of shortcomings with this skinning approach. A big one was UI lock-in. Ironically, if you skin an app and wish to maintain backwards compatibility with the thousands of skins selflessly authored by your vibrant community (seriously, I couldn’t believe how prolific these things were), then you were effectively locked into the primary UI. Forget about adding a new button anywhere.

  Another big problem was resolution-independence. Basing your UI on static bitmaps doesn’t scale well with various resolutions. Winamp had its normal mode and it also had double-sized mode.

  Skins proliferated among many types of programs in the late 1990s. I always treasured this Suck.com (remember them ? that’s a whole other nostalgia trip) essay from April, 2000 entitled Skin Cancer. Still, Winamp was basically the standard, and the best, and I put away my righteous nerd rage and even dug through the vast troves of skins. I remember settling on Swankamp for a good part of 1998, probably due to the neo-swing revival at the time.

  
  
  

  Then again, if Winamp irked me, imagine my reaction when I was first exposed to the Sonique Music Player in 1998 :

  
  
  

  The New UI Order
  Upon reflection, I realize now that I had a really myopic view of what a computer GUI should be. I thought the GUIs were necessarily supposed to follow the WIMP (windows, icons, mouse, pointer) paradigm and couldn’t conceive of anything different. For a long time, I couldn’t envision a useful GUI on a small device (like a phone) because WIMP didn’t fit well on such a small interface (even though I saw various ill-fated attempts to make it work). This thinking seriously crippled me when I was trying to craft a GUI for a custom console media player I was developing as a hobby many years ago.

  I’m looking around at what I have open on my Windows 7 desktop right now. Google Chrome browser, Apple iTunes, Adobe Photoshop Elements, and VMware Player are 4 programs which all seem to have their own skins. Maybe Winamp doesn’t look so out of place these days.