Bug#783983: blender: VSE stretches video segments and uses incorrect video starting point

[sudoman at ninthfloor.org]

Package: blender
Version: 2.72.b+dfsg0-3
Severity: important

Dear Maintainer,

this was not an issue in wheezy but it is in jessie and experimental.
the 2.74 binaries from blender.org do work.

to reproduce the first aspect of this bug, select the video editing mode
and add a long movie. increase the end point of playback range to 300000
at the bottom of the screen. (this is the maximum.) then zoom out on the
clips using the middle scroll wheel. then drag the green line over the
clips and watch the playback in the upper right hand corner.

what i expected to see was the full movie playing at a fast pace. what i
saw was a shorter clip playing back (rather quickly) instead. if you
click the play button, the video continues from that point at normal
speed, which makes sense i guess. i'm not sure what happens when
rendering from this state.

the other bug occurs when opening a blender file from the wheezy or
blender.org version of blender in the jessie (or experimental) version
of blender. opening the file in blender.org's version works.

in those files, i see the same issue as above, however i also see that
the soft cuts points (i haven't tested hard cuts) seem to be ignored.
even if a clip started from the middle of a movie in wheezy, it
incorrectly starts from the beginning in the VSE when using jessie's
version of blender. if i render that video, the starting point of the
video clip is incorrect. audio seems to be unaffected.

thanks for all of your hard work, dear maintainer!
-Andrew


-- System Information:
Debian Release: 8.0
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable'), (350, 'experimental'), (350, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages blender depends on:
ii  blender-data                      2.72.b+dfsg0-3
ii  fonts-droid                       1:4.4.4r2-6
ii  libavcodec56                      6:11.3-1
ii  libavdevice55                     6:11.3-1
ii  libavformat56                     6:11.3-1
ii  libavutil54                       6:11.3-1
ii  libboost-date-time1.55.0          1.55.0+dfsg-3
ii  libboost-filesystem1.55.0         1.55.0+dfsg-3
ii  libboost-locale1.55.0             1.55.0+dfsg-3
ii  libboost-regex1.55.0              1.55.0+dfsg-3
ii  libboost-system1.55.0             1.55.0+dfsg-3
ii  libboost-thread1.55.0             1.55.0+dfsg-3
ii  libc6                             2.19-18
ii  libfftw3-double3                  3.3.4-2
ii  libfreetype6                      2.5.2-3
ii  libgcc1                           1:4.9.2-10
ii  libgl1-mesa-glx [libgl1]          10.3.2-1
ii  libglew1.10                       1.10.0-3
ii  libglu1-mesa [libglu1]            9.0.0-2
ii  libgomp1                          4.9.2-10
ii  libilmbase6                       1.0.1-6.1
ii  libjack-jackd2-0 [libjack-0.116]  1.9.10+20140719git3eb0ae6a~dfsg-2
ii  libjpeg62-turbo                   1:1.3.1-12
ii  libjs-jquery                      1.7.2+dfsg-3.2
ii  libjs-jquery-ui                   1.10.1+dfsg-1
ii  libopenal1                        1:1.15.1-5
ii  libopencolorio1                   1.0.9~dfsg0-3
ii  libopenexr6                       1.6.1-8
ii  libopenimageio1.4                 1.4.14~dfsg0-1
ii  libopenjpeg5                      1:1.5.2-3
ii  libpng12-0                        1.2.50-2+b2
ii  libpython3.4                      3.4.2-1
ii  libsdl1.2debian                   1.2.15-10+b1
ii  libsndfile1                       1.0.25-9.1
ii  libspnav0                         0.2.2-1
ii  libstdc++6                        4.9.2-10
ii  libswscale3                       6:11.3-1
ii  libtiff5                          4.0.3-12.3
ii  libx11-6                          2:1.6.2-3
ii  libxi6                            2:1.7.4-1+b2
ii  libxxf86vm1                       1:1.1.3-1+b1
ii  zlib1g                            1:1.2.8.dfsg-2+b1

blender recommends no packages.

blender suggests no packages.

-- no debconf information