On Fri, 14 Nov 2003, Brian J. Murrell wrote:
> OK, I am done with dicking around with Quicktime. I really hate having
> to rebuild all software on my system simply because my distro does not
> ship any video tools with quicktime linked in.
Hmmm, I take a different approach and build the system up
from a bare distribution - i.e. don't trust the distribution's
(out of date) tools. Most of the video tools are in
development so I'd want the current versions anyhow ;)
> So, I am interested in how you all handle this multiple-AVI (because AVI
> is too stupid a container format to handle >2G files) crap efficiently
OpenDML. libquicktime, at least the cvs version - I haven't checked
on the last release tarball they made - has >2GB support in it
(at least that's what the code I was reading this morning says).
Actually I was done messing around with 2GB files eons ago. Raw DV
has no such limit and being a fixed record format (120000bytes/frame
for NTSC, 144000 for PAL) can be edited in an emergency with 'dd'.
> I have been looking at things like the avimerge but a tool like that is
> going to double my transient disk spaces needs, which with an 80G drive
> you would think would not be a big deal, but record 3 or 4 hours of TV
I can believe that - 80GB just doesn't last as long as it used to
<grin>
But with 200GB drives being $119 I stopped buying 80s ;)
Current price for a 250GB Western Digital (with a 3yr instead of 1yr
warranty) is $149 at Fry's this week.
> So here's my process, I am hoping you can help me find the right tools
> to work this process as efficiently as possilble (i.e. a pipeline with
> no or little need for intermediate disk storage would be ideal).
What type of capture hardware are you using? A DV method or
a WinTV card, or a MJPEG card?
If you're using DV then raw DV and smilutils+kino will do exactly
what you want without the need for multiple AVI files at all.
> 1. record with lavrec to multiple AVI files
> 2. create editlist with glav
> 3. transcode using edits to better compression (i.e. MPEG4) than MJPG
For the most part I haven't found MPEG4 to be better at the larger
frame (704x480) frame sizes. MPEG4 works great for creating
thumbnail'd (320x240) movies that can be sent (or uploaded) to
folks but as the image size increases so does the bitrate required
and things end up being almost the same size as MPEG2 using the
recent features from mpeg2enc.
> So given mpeg2(enc) encoding is too slow (thus the need for mencoder) and
Hmmm, I've gotten up around 14 frames/sec with mpeg2enc on
full NTSC (720x480) frames. Not real time but not all that
slow either.
> mencoder is not capable of multiple input files, but lavrec cannot
But it can read from stdin can't it? Piping into mencoder should
work ok.
> produce a single >2GB AVI file and that I don't want to double my
> transient disk space needs, how do I get from multiple AVI files to a
> single MPEG4 (or other mplayer playable format with as good a
> compression as MPEG4) file with edits in between?
>
> Open to all ideas, so try me. :-)
Ok - but remember, you did ask :-)
One word: DV
Second words: Canopus ADVC100
Then dvgrab/kino and smilutils. You can create the edit list
using kino, then smil2raw to stdout into mencoder and away you go. No
2GB limit, no multiple files, you can get as creative with the
edits and transitions/specialeffects as kino allows, and so on.
Good Luck!
Steven Schultz
-------------------------------------------------------
This SF. Net email is sponsored by: GoToMyPC
GoToMyPC is the fast, easy and secure way to access your computer from
any Web browser or wireless device. Click here to Try it Free!
https://www.gotomypc.com/tr/OSDN/AW/Q4_2003/t/g22lp?Target=mm/g22lp.tmpl
_______________________________________________
Mjpeg-users mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/mjpeg-users
