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[cenwen <eolinwen@xxxxxxxxx>]

yes and just one precision. Don't forget to install before the dev version for exemple x264 and x264-dev. In all cases, the script ./configure tells you if something is missing.
Thanks

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White artifacts (eg dots) introduced to the video when previewed and exported, same effect in melt
https://bugs.launchpad.net/bugs/571954
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Status in OpenShot Video Editor: Won't Fix

Bug description:
1) OS: Ubuntu 10.04 ReleaseCandidate (the beta release just before LTS).
2) Installed using Ubuntu Software Centre
3) Version of OpenShot = 1.1.3

Files in a particular format (a type of mpg) that I am trying to edit all seem to have white artifacts (e.g. dots/lines) introduced around very dark/black areas of the frame when previewed in OpenShot - these artifacts also persist in the exported video from OpenShot.  I have played the (unprocessed) video in melt however, and it has the same effect there too, so looks like an issue with MLT?  These artifacts are _not_ present when the original (unedited) video is played using (e.g.) Totem.

I have attached a sample from the first 10 seconds of exported video from OpenShot that shows the white artifacts.  These artifacts can be seen in the dark areas of the frame in the lower-right 'quadrant', around the tyres and the black trousers of the woman.  I am not sure if I can add another attachment with the original video on?

Here is the info about the original full length file from FFMPEG:
$  ffmpeg -i MOV01988.MPG
FFmpeg version SVN-r0.5.1-4:0.5.1-1ubuntu1, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  configuration: --extra-version=4:0.5.1-1ubuntu1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
  libavutil     49.15. 0 / 49.15. 0
  libavcodec    52.20. 1 / 52.20. 1
  libavformat   52.31. 0 / 52.31. 0
  libavdevice   52. 1. 0 / 52. 1. 0
  libavfilter    0. 4. 0 /  0. 4. 0
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0
  built on Mar  4 2010 12:41:55, gcc: 4.4.3
[mpeg @ 0x248d480]invalid dts/pts combination
    Last message repeated 46 times
Input #0, mpeg, from 'MOV01988.MPG':
  Duration: 00:01:24.16, start: 0.110000, bitrate: 2915 kb/s
    Stream #0.0[0x1c0]: Audio: mp2, 32000 Hz, mono, s16, 64 kb/s
    Stream #0.1[0x1e0]: Video: mpeg1video, yuv420p, 640x480 [PAR 1:1 DAR 4:3], 104857 kb/s, 25 tbr, 90k tbn, 25 tbc