Re: putting a movie onto an SD card to play in camcorder
- From: sunita.malpani@xxxxxxxxx
- Date: Fri, 22 Jun 2007 16:52:00 -0700
On Jun 21, 2:11 am, Frank <f...@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
On Wed, 20 Jun 2007 17:23:50 +0100, in 'rec.video.desktop',
in article <putting a movie onto an SD card to play in camcorder>,
"tg" <t...@xxxxxxxxxxxxxxxxxxxxxx> wrote:
I have a canon TX-1 pocket camcorder - it's a great little camera but
it will only record a video from through the lens and not from a video
source. I want to put my own little movie (from my PC) onto an SD card
so I can play the movie on the camcorder. So far I've had no luck, the
camera keeps saying 'unidentified image'. I've noticed that when the
camera records a movie it saves it on the SD card as an avi file, but
each avi file also has a corresponding .THM file of the same name. I
don't know whether I need to create a dummy .THM file for the avi or
not. Obviously there is some kind of encoding that the camera does as
it saves the video onto the SD card but I don't know what it is, thus
I can't reproduce it when I'm trying to export my movie from the PC to
the SD card. Thanks for any help.
I don't use pocket camcorders, but maybe I can offer a couple of
suggestions.
If you want the TX-1 to play back files that you've encoded yourself,
then you'll most likely have to encode the files into the specific
format or formats that the TX-1 can accept. If you can't locate this
information in the product's documentation, then you need to copy one
of the camcorder-created .avi files onto your local hard disk drive
and take a look at it in a program such as GSpot.
http://www.headbands.com/gspot/
This program, and others like it, will tell you the technical
characteristics of the .avi file -- items such as frame size, frame
rate, codec, etc. Then you need to take one of your own files and try
to transcode it into an .avi file which exactly matches the
characteristics of the files that the camcorder itself creates. Then
copy this file to the SD card and see if the camcorder will play it.
As to the .THM (thumbnail) files, if it works like the Sony PSP
(PlayStation Portable) -- and it may or may not, I'm just guessing
here -- the .THM file is just a small JPEG image file with a .THM
extension instead of the usual .jpg or .jpeg extension. You can easily
confirm or disprove this by looking at one of the .THM files in a hex
editor. If you don't have a hex editor program handy, then just use
WordPad. What you're looking for is the ASCII character string "JFIF"
(without the quotes) up toward the beginning of the file. If you see
"JFIF", then it's a JPEG file and you can easily create your own .THM
files just by renaming the file extension on an existing .jpg or .jpeg
file.
Note that the dimensions of acceptable .THM files are probably
limited, however. 160 by 120, or even 320 by 240, might work, but
something that's 1000 pixels by 1000 pixels probably will not work.
The file size (as measured in bytes) may also be limited. Try to
create .THM files which are close in size to the ones that you find on
the SD card.
The usual purpose of the .THM file is simply to present a frame grab
from the associated video file for identification purposes when you
browse the list of video files on the SD card.
Good luck!
--
Frank, Independent Consultant, New York, NY
[Please remove 'nojunkmail.' from address to reply via e-mail.]
Read Frank's thoughts on HDV athttp://www.humanvalues.net/hdv/
Hi Frank,
I really admire your work so much. Yesterday i read through "Frank's
throught on HDV" (of course its impossible to read through it in one
day...i read only what was relevant to me...but i saved it as
"Favorites"). Wonderful work and so generous..... for the past few
days i have been getting all very confused on HDV and thinking about
which camera i should buy and all that.. i am not a professional
yet... but i think i can become at least a semi professional if i try
my hand at a camera for some time.....first i thought Sony's HDR-
SR7... but somehow i get a feeling that this won't make me a
professional..... I am getting a camera (4-months old)....which is
Sony's HVR-FX1E(PAL).... but i am also attracted to external hard
drives for example HVR-DR60.....or CITIDISK..(want to get rid of
digitization process....also want freedom from tapes whenever i decide
to and besides i think that is the way to future)..... now i am
wondering if HVR-DR60 would it be compatible with this camera or not
and whether PAL is a hindrance....should my camera be necessarily NTSC
for me to be able to use this external hard drive..... and how good is
the performance of this hard disk.....,..and what about edit....which
softwares are compatible if i do store on the hard drive in HD
mode....and are there any other external hard drive with good capacity
like 60,80 gb which could suit me better? Really i would appreciate
some help here so that i could make a right decision.... putting in
real sweat money.....
.
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