On 05/15/2011 12:31 PM, andy baxter wrote:
On 15/05/11 11:18, Jeremy Jongepier wrote:
Hello Heikki,
The tapes have been captured and I've started editing. So far kdenlive
doesn't like a system without PulseAudio or the avi files sitting on a
NTFS drive apparently so I didn't get very far yet. I'll continue
tomorrow.
I've just been editing the raw file of my talk from the website in
kdenlive (just to clip it, adjust the volume and add an introductory
slide).
Hi Andy,
Clip/cut can be done easily using oggz-chop. It's a loss-less way to
edit ogg files.
However pre-pending an intro slide is more complicated than it ought to
be. OGG files with an ogg-skeleton track can simply be concatenated but
most video-players won't recognize that and some [ffmpeg] transcoding
magic is needed to make it compatible :(
It had trouble using alsa until I worked out that you
need to
install 'libsdl1.2debian-alsa'. (in ubuntu, probably the same in debian).
Another gotcha that took me a while to work out is that the version of
ffmpeg on ubuntu lucid won't read ogg theora videos properly, so you
need to either use a newer distro, or compile your own ffmpeg from the
website. (if you compile your own you need to add --enable-libtheora
--enable-libvorbis to the configure flags to be able to export to ogg
theora).
One question I have is whether you have captured the screenshot and
camera streams separately on disk to edit later? The raw video of my
talk spends a lot of time faded to the screenshot.
Alas, no. We only had one DV scan converter and captured the output
after the video-mixer.
We do have raw DV files (better quality than the encoded OGG/Theora) for
each presentation. But they're in the order of 8-10 GB per presentation.
If you like to have those, get in touch with John Lato
via lac(a)linuxaudio.org.
best,
robin