Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: Very slow x264 encoding using Avidemux in 10.04

  1. #1
    Join Date
    Jul 2009
    Beans
    13

    Unhappy Very slow x264 encoding using Avidemux in 10.04

    I have been using Avidemux to encode edited video using x264 and the mp4 container for most of my videos. My PCs are not new, using single-core AMD Athlon processors.

    In 9.04 and 9.10 (Linux Mint), encoding speeds ranged from 7 to 10 frames per second. In 10.04 these dropped down to less than 2 frames per second.

    I booted back into Linux Mint 8 (9.10) and the same video encoded at the previous 7 to 10 fps.

    I tried with other videos in different formats (mpeg2 and VOB). The results were the same - 10.04 was extremely slow encoding x264 but Mint 8 was "normal" at 7 to 10 fps.

    With a dual-core notebook, however, the encoding speeds ran at 8 to 14 fps in 10.04.

    Anyone had the same problem? Was 10.04 optimized for dual and multi-core at the expense of single-core? If so, is there a way to restore "single-core optimization"?

    Thanks in advance for any suggestions or ideas.

  2. #2
    Join Date
    Sep 2009
    Beans
    2,330

    Re: Very slow x264 encoding using Avidemux in 10.04

    as long as you have 264
    try tragtor
    read and install what the page tells you to do

    http://mein-neues-blog.de/tragtor-gui-for-ffmpeg/

    hope you can install it

    and enjoy a faster speed

  3. #3
    Join Date
    Jul 2009
    Beans
    13

    Re: Very slow x264 encoding using Avidemux in 10.04

    Thanks for the reply. I tried Tragtor. The encoding is faster but to get a smaller file size the video becomes very blocky especially when there is fast motion.

    Avidemux was faster in 9.04 and 9.10 but in 10.04 it became very slow. Something has changed in 10.04 and Avidemux is not behaving as it used to and the speed for encoding x264 has dropped from about 8 or 9 fps to as low as 1 fps.

  4. #4
    Join Date
    Sep 2009
    Beans
    2,330

    Re: Very slow x264 encoding using Avidemux in 10.04

    dont know if changing the plugin in gstreamer-properties may help

    you should have cheese loaded
    in sound&video open it look in its help file faq's

    it tells you how to change it

  5. #5
    Join Date
    Nov 2008
    Beans
    19

    Re: Very slow x264 encoding using Avidemux in 10.04

    Do u have "Yasm" ?

  6. #6
    Join Date
    Sep 2006
    Beans
    3,530

    Re: Very slow x264 encoding using Avidemux in 10.04

    Quote Originally Posted by orionds View Post
    Anyone had the same problem?
    I can't duplicate the slowness. I tried 32-bit Karmic and 64-bit Lucid (both virtual machines) on an Intel i7-860. Avidemux took 1:15 minutes in Karmic and Lucid took 1:32 with both using the same clip and both exporting to MPEG-4 AVC (x264)/Audio copy in MP4.

    As for x264 itself. I opened two terminals and in one:
    Code:
    wget http://mirror05.x264.nl/Dark/x264clips/IronMan.mkv
    sudo apt-get install mplayer
    mkfifo video.y4m
    mplayer input.foo -vo yuv4mpeg:file=video.y4m -nosound -ao null -noframedrop -ni
    In the other terminal:
    Code:
    time x264 --threads auto --crf 26 video.y4m -o output.264
    Karmic took 1:48 minutes and Lucid took 1:54 minutes to encode. I guess that the time difference is due to Karmic's x264 being older and the default settings between the two x264 versions probably vary.

    Update: More numbers, but this time comparing today's x264 that I compiled. Karmic 2:19 minutes and Lucid 1:56 minutes.
    Last edited by FakeOutdoorsman; May 10th, 2010 at 08:04 PM.

  7. #7
    Join Date
    Jul 2009
    Beans
    13

    Re: Very slow x264 encoding using Avidemux in 10.04

    I tried using Arista transcoder on the Ironman mkv clip on a dual core notebook.

    The encoding speed in 10.04 has half that of 9.10.

    I have posted this as a bug in Launchpad. Hope they can fix it or provide a solution.

    Thanks for the suggestions but they haven't worked so far.

  8. #8
    Join Date
    Sep 2006
    Beans
    3,530

    Re: Very slow x264 encoding using Avidemux in 10.04

    Are you experiencing slowness in Avidemux, x264, or Arista? Did you test x264 as I did in my previous post? What is the link to your bug report?

  9. #9
    Join Date
    Sep 2006
    Location
    Southern Indiana, USA
    Beans
    1,644
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Very slow x264 encoding using Avidemux in 10.04

    Also, another Avidemux issue with more recent updates of it, in Karmic and Lucid - may be related?
    http://ubuntu-ky.ubuntuforums.org/sh....php?p=9327772
    Ubuntu 12.04 LTS (& Windows XP-SP3 for Flight Sim only) - (1) 3.4 G/3G RAM/NVIDIA GT630, 2048VRAM/SB AudigySE Audio (2) 2.9 G/2G RAM/NVIDIA 9500GT,1024VRAM/SB Audio (3) 2.3 G/2G RAM/NVIDIA FX1500M,256VRAM/Sigmatel Audio

  10. #10
    Join Date
    Jan 2008
    Beans
    60

    Re: Very slow x264 encoding using Avidemux in 10.04

    Think I'm having this problem also. x264 encoding ridiculously long - 20x slower than Xvid for example!

Page 1 of 2 12 LastLast

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •