the Design Experience Weblog Archive

http://www.mainconcept.com/site/?id=954 (not free)

http://www.pitivi.org/wiki/Main_Page

http://en.wikipedia.org/wiki/Cinelerra

Next I tried creating an edl file which will tell mencoder to seek to an exact frame. This worked, in that I could start the clip at the right point, but the video and audio became out of sync.

Another trip to #mplayer and I learned I could use transcode to work at the frame level.

Now I just needed to learn which frame i wanted, instead of using the time in seconds. It was recommended to look at avidemux which is pretty neat in that I could skip frame by frame though the video.

I used the HOWO here http://www.dizwell.com/prod/node/52?page=0%2C1 for Ubuntu 6.06. it works fine on Ubuntu 7.04 also.

I used this image, http://www.vmware.com/vmtn/appliances/directory/972 which I do NOT recommend, as it has no X server, etc required to install Oracle. Check out the desktop image available here from the same author: http://chrysaor.info/?page=ubuntu

I had a problem with the network driver in the Guest OS so I used this: http://www.vmware.com/support/esx15/doc/esx15_install11.html

The post was good but I was particularly impressed with this comment

stephane says:

When faced with a bug or bug report, it's a known fact that there are 3 steps for a developer:

(1) it can never happen!

(2) strange, it happens...

(3) how can it even have worked before?

With some practice, you can skip step 1 and it makes you spare a lot of time.

I have gone through those three stages too many times to count.

mencoder can encode to FLV but it kept losing either the video or audio. I next tried coverting part of the RM to AVI with -ss -endpos parameters to mencoder but ffmpeg did not like them and the AVIs had missing bits of video.

Next I tried encoding the whole RM into AVI.

mencoder video1.rm -oac mp3lame -ovc xvid -xvidencopts bitrate=150 -srate 44100 -af resample=44100 -o video1.avi

This worked fine. After that I took the clips of the AVI as new AVIs.

mencoder video1.avi -ss 02:32 -endpos 03:18 -oac mp3lame -ovc xvid -xvidencopts bitrate=150 -o video1a.avi

Then I fed the AVIs into ffmpeg to generate the FLV files.

ffmpeg -i video1a.avi video1.flv

I did not attempt any sort of optimization yet.

I used SWFObject http://blog.deconcept.com/swfobject/ with JW FLV Player http://www.jeroenwijering.com/?item=Flash_video_Player (JW FLV Player comes with SWF Object.) to embed the FLV into an HTML file.


Here are some video processing links
http://en.linuxreviews.org/HOWTO_Convert_video_files
http://gentoo-wiki.com/TIP_MEncoder_Tips_and_Tricks

The link says edgy. I am trying to build it on Feisty.
I did not use the AMR patch.

I had to apt-get intstall libx264-dev

Make sure you have build tools, and enable multiverse and universe repositories.

sudo apt-get install quilt libsdl1.2-dev libogg-dev libvorbis-dev liba52-dev libdts-dev libimlib2-dev texi2html libraw1394-dev libdc1394-13-dev libtheora-dev libgsm1-dev liblame-dev libxvidcore4-dev libfaac-dev libfaad2-dev libx264-dev

cd /usr/local/src
sudo apt-get source ffmpeg
cd ffmpeg
sudo dpkg-buildpackage
cd ..
sudo dpkg -i ffmpeg_0.cvs20060823-3.1ubuntu4+medibuntu2_amd64.deb libavcodec0d_0.cvs20060823-3.1ubuntu4+medibuntu2_amd64.deb libavcodec-dev_0.cvs20060823-3.1ubuntu4+medibuntu2_amd64.deb libavformat0d_0.cvs20060823-3.1ubuntu4+medibuntu2_amd64.deb libavformat-dev_0.cvs20060823-3.1ubuntu4+medibuntu2_amd64.deb libpostproc0d_0.cvs20060823-3.1ubuntu4+medibuntu2_amd64.deb libpostproc-dev_0.cvs20060823-3.1ubuntu4+medibuntu2_amd64.deb

[Sometime later...]

It does not work with mencoder. They seem to use difference lavc codecs which means you can't encode the output from mencoder with ffmpeg.

How to convert videos http://en.linuxreviews.org/HOWTO_Convert_video_files

When I tried that I got an error message:

Package w32codecs is not available, but is referred to by another package.

This may mean that the package is missing, has been obsoleted, or

is only available from another source

E: Package w32codecs has no installation candidate

There is a w64codecs package. I installed that and it works.

Thanks Mark.