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• Virtual host compared to multiple servers

  9 septembre 2011, par josiecat

  This may be dumb but has me wondering why and I know how to setup the virtual host but need to know the why or what it is good for.

  Why do you setup virtual host for local development and why not just put sub directories ?

  What are the real world uses and how do you use virtual host ?

  (my normal set up as of now)
  I use Mamp and just put more folders (speaking dummy terms here) in the htdocs folder. Is that ok what am I missing ?

  The reason why I would like to use virtual hosting is because I would like to have a few servers to try different technologies (e.g. adding ffmpeg support for streaming video and many others ) but do I use virtual hosting to be able to have more than one server or do I need to use something like virtual machine to have multiple servers with different versions of PHP, Mysql etc...?

  I understand how to set this stuff up just don't understand the difference from virtual host to multiple servers ? could I actually set up one with php just the basic and another for php with ffmpeg-php and other stuff like zend or what ever just to have different server environments to basically mock the actual server that the project will land when done ?

• Ffmpeg I/O error

  11 septembre 2011, par David542

  I am trying to get info on a file. I can this on either a file or url on my local machine. However, when using my server, I can only get info on a file. This is what happens when I try a URL :

  [david542@web ~]$ ffmpeg -i http://url/1video.mp4
  
  FFmpeg version UNKNOWN, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  
    configuration: --enable-gpl --enable-libamr-nb --enable-libamr-wb --enable-libfaac --enable-libfaad --enable-libmp3lame --enable-nonfree
  
    libavutil     49.14. 0 / 49.14. 0
  
    libavcodec    52.15. 0 / 52.15. 0
  
    libavformat   52.28. 0 / 52.28. 0
  
    libavdevice   52. 1. 0 / 52. 1. 0
  
    built on Apr 30 2009 20:58:02, gcc: 4.1.2 20080704 (Red Hat 4.1.2-44)
  
  http://url/1video.mp4: I/O error occurred
  
  Usually that means that input file is truncated and/or corrupted.

  However, the file is not corrupted, as this works fine on my local machine. What do I need to do to fix this ? Thank you.

• Thread count option in FFmpeg for FASTEST conversion to h264 ?

  5 septembre 2013, par Saptarshi Biswas

  I need to maximize speed while converting videos using FFmpeg to h264

  • Any input format of source videos
  • User's machine can have any number of cores
  • Power and memory consumption are non-issues

  Of course, there are a whole bunch of options that can be tweaked but this question is particularly about choosing the best -thread <count></count> option. I am trying to find an ideal thread count as a function of

  • no. of cores
  • input video format
  • h264-friendly values maybe ?
  • anything else missed above ?

  I am aware the default -thread 0 follows one-thread-per-core approach which is supposed to be optimal. But I am not sure if this is time or space-optimized. Also, on certain testcases, I've seen more threads (say 4 threads on my dual core test machine) finishes quicker than the default.

  Any other direction, say configure options w.r.t. threads, worth pursuing ?