Displaying 20 results from an estimated 5000 matches similar to: "Legalese. What is stride?"
2003 Jul 23
1
Aspect ratio question
Hi,
despite the warnings on the website ;-) I played with the current CVS
source of theora on Windows 2000 w/ Microsoft Visual C++. The codec and
the "experimental" example programs compiled fine. I also encoded a 33
MB MPEG2 (?) video (3 minute trailer) to a 14 MB .OGG using "mplayer -vo
yuv4mpeg -ao pcm" and the "encoderwin" sample program, and play it with
the
2004 Dec 20
2
frame_height, height, y_height etc...
I'd previously been working on the assumption that the frame_height was the
height of the inner picture region... and height was the height of the outer
frame.
Then upon readnig the spec... where it calls the outer part the frame and
the inner part the picture region... i assumed i'd made a mistake and that
frame_width is actually >= width in the theorainfo structure... ie
2003 Jul 16
1
Too early to switch aspect scaling on?
Hello all.
I've implemented aspect scaling in xine, but have it turned off by
default, because it appears it isn't absolutely clear if the fields in
theora should mean pixel or frame aspect yet.
In a recent IRC discussion, it appears most felt that pixel aspect
should be it. Would it be acceptable to turn this on in xine, or should
I wait until you make some official decision about it?
2004 Dec 08
3
yuv2rgb
hi all,
i'm trying to code a tool to get some images from a ogg/theora file ....
so basically i need to get a frame and convert to rgb ... and here is my
question (sorry, i'm newbe here) ...
how to convert a yuv_buffer to a rgb matrix ?
i tryied diferent ways but my mistakes are bassically cause i don't
understant how yuv_buffer structure works ...
anybody can help? thanks a lot.
2004 Aug 02
1
Theroa Guess Confirmation
Hi there, is there any document giving a high-level overview of how to
use "libtheora"? As it stands, I'm scrounging through headers and
example code, and doing a whole lot of guessing. In the meantime,
could you either confirm or deny the following guesses?
1) Before compressing with Theora, I must unpack my YUY2 data into
three separate arrays (Y, U, and V respectively), and
2004 Jun 29
6
Encoding theora...
Just trying to debug my theora encoder... just wondering if someone could
give me some insight on a few thigns...
In the yuv_buffer i'm sending in... i am just setting
y_stride = y_width = videoWidth
uv_stride = videoWidth/2
y_height = videoHeight
uv_height = videoHeight/2
Making the y buffer (width*height) and each of u and v (width*height/4)
Am i correct in doing this ? I knwo stride
2005 Sep 27
4
problems understanding yuv_buffer format
hi folks!
once again i am trying to decode a yuv_buffer to a 24 bit RGB buffer.
last time nobody seemed willing to tell me how to do this, so i am
trying again.
i try to make my questions more simple. what i need to know is:
how many bytes are in each y, u, v array?
what for are these strides?
what exactly is a "plane" in a frame, and what does it do?
what i want to achieve is
2004 Apr 01
1
YUV Format
I posted this the other day... but it didn't get delivered...
-------------------------------------------------------------------
I'm getting stuck into a theora decoder for directshow... i was just wondering if someone could give me some info.
What output format does theora use ?
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwmt/html/YUVFormats.asp
2002 Aug 06
1
VP3 Patch For xine
Hi,
Since a number of people are eager to try out the native VP3
decoder in xine, I have made a patch available, bz2-compressed:
http://www.pcisys.net/~melanson/codecs/xine-vp3-decoder-patch.bz2
To work with this patch:
1) Get the latest xine-lib from CVS. Visit this page for more details:
http://sourceforge.net/cvs/?group_id=9655
The module name is xine-lib, but you will also need
2007 Aug 31
1
yuv_buffer strides
Hi,
is there any place where the possible values for the strides in the
yuv_buffer structure is specified? or just in the source code? ;)
I could compress a video with, lets say, yuvbuf.y_stride =
yuvbuf.y_width, so the yuvbuf.y[0] really started in the start of the
y channel data. I watched the video in several players, and
everythings' ok. But, when programming the decompress process, the
2006 Aug 20
1
Simple RGB->YUV Stuff...
I've spent the weekend or so trying to get my head around Theora and I'm
just not having any luck. First of all, I really don't have any interest
in immersing myself in video encoding--I just have one simple thing I'd
like to do--so I haven't spent any time reading about the theory or
specs or anything like that.
I'm attempting to write a "render-to-theora"
2008 Feb 11
2
[LLVMdev] "make check" failures: leaq in fold-mul-lohi.ll, stride-nine-with-base-reg.ll, stride-reuse.ll
I'm seeing the following failures with "make check" (x86-32 linux):
FAIL: test/CodeGen/X86/fold-mul-lohi.ll
Failed with exit(1) at line 2
while running: llvm-as < test/CodeGen/X86/fold-mul-lohi.ll | llc -march=x86-64 | not grep lea
leaq B, %rsi
leaq A, %r8
leaq P, %rsi
child process exited abnormally
FAIL:
2007 Jan 06
7
FFmpeg Theora encoding patch
Hi,
Attached is my patch to add theora encoding to ffmpeg's libavcodec (by
using libtheora). I am requesting help to fix the bug I mention below
and am seeking general comments before I submit the patch properly.
Files encoded using this encoder have a problem playing in VLC. The
files will not play unless "Drop late frames" has been unticked in the
advanced video settings.
2008 Feb 12
0
[LLVMdev] "make check" failures: leaq in fold-mul-lohi.ll, stride-nine-with-base-reg.ll, stride-reuse.ll
Fixed. Thanks.
Evan
On Feb 11, 2008, at 2:35 AM, Duncan Sands wrote:
> I'm seeing the following failures with "make check" (x86-32 linux):
>
> FAIL: test/CodeGen/X86/fold-mul-lohi.ll
> Failed with exit(1) at line 2
> while running: llvm-as < test/CodeGen/X86/fold-mul-lohi.ll | llc -
> march=x86-64 | not grep lea
> leaq B, %rsi
> leaq
2008 Feb 12
2
[LLVMdev] "make check" failures: leaq in fold-mul-lohi.ll, stride-nine-with-base-reg.ll, stride-reuse.ll
Hi Evan,
In -relocation-model=static mode, those tests are now getting
code like this
leaq A, %rsi
movss %xmm0, (%rsi,%rdx,4)
instead of this:
movss %xmm0, A(,%rdx,4)
This is specifically what these tests were written to catch :-).
Running them with -relocation-model=pic is hiding the real bug.
Dan
On Feb 11, 2008, at 11:22 PM, Evan Cheng wrote:
> Fixed.
2011 Mar 15
1
Using stride on non-RAID
Hello,
I understand the need for a proper stride setting when formatting a filesystem on a RAID device. However, is there any problem in using a stride setting when formatting a filesystem on a regular non-RAID, non-SSD, just plain-vanilla-single-disk block device? I'm sure there isn't any benefit to it, but I'm curious if there is any harm.
The reason I ask is I'm looking at
2007 Jun 05
1
Calculating stride values?
All,
I have a question about calculating the value for the -E stride option
to mke2fs.
The mke2fs man page says
stride=stripe-size
Configure the filesystem for a RAID array with stripe-size filesystem blocks per stripe.
So stride = size of stripe/blocksize.
The size of a stripe is the RAID chunk size * the number of drives in the RAID.
My question: are parity disks
2012 Oct 04
1
[PATCH] gallium/nouveau: use pre-calculated stride for resource_get_handle
Fixes FDO#55294.
---
src/gallium/drivers/nv30/nv30_miptree.c | 3 +--
src/gallium/drivers/nv50/nv50_miptree.c | 3 +--
2 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/src/gallium/drivers/nv30/nv30_miptree.c b/src/gallium/drivers/nv30/nv30_miptree.c
index 5a9a63b..9700fa8 100644
--- a/src/gallium/drivers/nv30/nv30_miptree.c
+++ b/src/gallium/drivers/nv30/nv30_miptree.c
@@ -56,8
2008 Feb 12
0
[LLVMdev] "make check" failures: leaq in fold-mul-lohi.ll, stride-nine-with-base-reg.ll, stride-reuse.ll
Fixed. However, I wonder if we are doing the right / smart codegen for
static codegen. AMD64 ABI document seems to indicate rip relative
addressing should be used even in this case (see page 38). You know
about about Linux addressing mode than I do. Please check.
Thanks,
Evan
On Feb 12, 2008, at 10:10 AM, Dan Gohman wrote:
> Hi Evan,
>
> In -relocation-model=static mode, those
2005 Aug 05
3
decoder init/clear
Enabling the following function in tests/noop.c:
noop_test_decode ()
{
theora_info ti;
theora_state th;
theora_info_init (&ti);
theora_decode_init (&th, &ti);
theora_clear (&th);
theora_info_clear (&ti);
}
segfaults.
The cause is that theora_decode_init() expects a theora_info structure
which was previously initialized by passing actual bitstream data
through