10 Jun
2011
10 Jun
'11
7:25 p.m.
On Fri, 2011-06-10 at 18:57 +0200, Renato wrote:
On Fri, 10 Jun 2011 17:58:46 +0200
Philipp <hollunder(a)lavabit.com> wrote:
I don't think so, assumed you can display the video without side effects
in a way, that you could 'record your desktop', than you only would be
able to record video, but AFAIK not audio.
An app like Cinelerra can separate the container's audio and video, but
using video apps on Linux can become a PITA ...
21.9 Improving performance
For the moment GNU/Linux is not an excellent desktop. It is more
of a server. Most of what you will find on modern GNU/Linux
distributions are faceless, network-only programs strategically
designed to counteract one Microsoft server feature or another
and not to perform very well at user interaction. There are a
number of parameters on GNU/Linux, which ordinary people can
adjust to make it behave more like a thoroughbred in desktop
usage.
21.9.1 Disabling swap space
21.9.2 Enlarging sound buffers
21.9.3 Freeing more shared memory
21.9.4 Speeding up the hard drive
21.9.5 Disabling cron
21.9.6 Reducing USB mouse sensitivity
21.9.7 Assorted X tweeks
21.9.8 Speeding up the file system
http://cinelerra.org/docs/cinelerra_cv_manual_en.html
... if the app after editing should make a container again, it can
happen that the old man became a voice like Mickey Mouse or the
beautiful woman is transformed to a Conehead. After 12 hours using all
resources of your computer you will know if the video is ok or not. I
nearly have forgotten to mention, that it also can happen that audio and
video get out of sync during this process ;). YMMV.
On my machine Cinelerra always 'worked' OOTB! On Philipp's it doesn't
run.
Regards,
Ralf
Hi,
sorry for abusing this list for a mostly video editing question, but I
didn't find a proper list and knew that we have some video people on
this list.
I'd like to fix some videos that have partially out of sync video and
audio, meaning that beginning at a certain point in the video the
audio is suddenly out of sync by a couple of seconds. There's no
constant change, the delay seems fixed once it's there.
I wonder how to fix such a thing. The files are xvid encoded videos
and vbr mp3 audio inside avi containers. I thought it should be
reasonably easy to cut and move the audio (re-encode if unavoidable,
but I know it's in principle possible without) and put it back in a
container, but I didn't manage.
Can someone recommend a program/workflow that would allow this?
I tried:
- Avidemux: seems like actual editing is not what this program was
written for, couldn't figure it out, but it seems close
- openshot: couldn't figure out how to separate video/audio
- kino: seems to only work with DV-files, apparently takes ages to
decode the file, doesn't seem to be what I need
- openmovieeditor: I figured it might work by dragging the file to
both a video and an audio track, but I got extremely garbled audio
output, no idea what's wrong
- cinelerra-cv: Doesn't start. No error message, it simply shows no
window, nothing. Well, it does something with the screen, but it
shows nothing.
- pitivi: Doesn't seem like it can play back the video. I can drag the
video to the tracks and it starts to draw a waveform, I guess no
video thumbnails because of: gst.ElementNotFoundError: pngenc
Doesn't seem to be able to play the video.
- kdenlive: would require me to install 30 additional packages, total
about 200MB, no thanks.
I thought it would be a simple task, really nothing fancy. Seems like
I was wrong.
Regards,
Philipp
Hi, unfortunately can't give you a full solution, but only a hint: in
mplayer with "-" and "+" you can adjust audio/video syncronization
by
multiples of 100ms (maybe you cand do finer, but I'm not sure).
maybe you could then somehow record the output to a new file?