In floating point, all you have to do is flip a sign bit. But with
integers, it's not so easy. There is no instruction for absolute value in
MMX, you have to use a four instruction sequence and two registers. Slower
than squaring a value, which only takes two instructions.
I finally
Gert, Robert,
Thanks very much for the LPCM feedback. It is *extremely* interesting to get
real feedback on some of these fiddly issues. Just a quick question: are the
noise problems Robert had with a hardware player or software? If hardware,
this would indicate there is a 'funny'
On Sunday 21 December 2003 20:26, Al Bogner wrote:
After every mplex from different sources I get this warning:
++ WARN: [mplex] Discarding incomplete final frame MPEG audio stream
c0!
Is this a serious problem or can I ignore this?
Hi Al,
This is harmless it simply mplex saying that the
Am Sonntag, 4. Januar 2004 16:01 schrieb Andrew Stevens:
On Sunday 21 December 2003 20:26, Al Bogner wrote:
After every mplex from different sources I get this warning:
++ WARN: [mplex] Discarding incomplete final frame MPEG audio
stream c0!
Hi Andrew!
Is this a serious problem or can I
Hello.
How do y4mscaler and yuvscaler compare
when scaling a video stream for MPEG2
encoding for SVCD, in terms of speed
and image quality?
Regards.
Romildo
--
Prof. José Romildo Malaquias[EMAIL PROTECTED]
Departamento de Computação [EMAIL PROTECTED]
Univ. Federal de Ouro Preto
Steven M. Schultz wrote:
Do you have the original source material to perform encoding from?
Alas, no.
I tried a brief experiment on a .mpg file - I used dd to cut a
section
from the middle of the file (attempting to simulate the 'hacked apart'
you mention). Then I used mplayer to dump the
I was using the software player xine. I will have an opportunity to
test with hardware in the near future. I am building up to authoring my
first DVD. I've done a lot of SVCD's but recently acquired a DVD
writer. When I get my first DVD authored to my statisfaction, I'll try
both with and
Okay, since I didn't have my original material anymore and re-encoding
the VCD is not really an option, I used a sledgehammer solution.
I created an a couple of frames long, black video sequence and put it at
the beginning of each video file.
mplex then recognizes it as video stream and although
On Sun, Jan 04, 2004 at 09:28:30AM -0800, Steven M. Schultz wrote:
On Sun, 4 Jan 2004 [EMAIL PROTECTED] wrote:
How do y4mscaler and yuvscaler compare when scaling a video stream for MPEG2
encoding for SVCD, in terms of speed and image quality?
I've found y4mscaler to be better.
I'm not sure if this is the proper channel to ask about the mencvcd script, so
let me know in whatever appropriate manner ;-)
Anyhow, I have a DivX file which I encoded to SVCD, the picture quality was
great but the sound was waay off, and I suspect it is because of my use of
incorrect
On Sun, Jan 04, 2004 at 02:51:18PM -0800, Steven M. Schultz wrote:
On Sun, 4 Jan 2004 [EMAIL PROTECTED] wrote:
[...]
yuvscaler -v 0 -O SVCD -n n
as a filter. What would be the scaling method whose resulting
quality best aproximates to the yuvscaler call above?
Hmmm, what
On Sun, 4 Jan 2004 [EMAIL PROTECTED] wrote:
I am encoding from a 672x272 AVI movie.
Ah, ok.
Ah, I see the -vf expand :504 in the mplayer command. Why is that
present? Perhaps if that was left out things would work better.
It adds black borders at the top and
On 4 Jan 2004, Florin Andrei wrote:
MPEG2 without B frames makes some DVD players choke. The default
What player is so braindamaged and standards non-compliant as to
choke on an *optional* part of the MPEG-2 specs? (B frames are
optional).
Are you sure that
On Mon, 05 Jan 2004 00:05:50 +0100, Lehmeier Michael [EMAIL PROTECTED]
wrote:
On Sat, 2004-01-03 at 18:13, Robert Kesterson wrote:
On Sat, 03 Jan 2004 16:01:28 +0100, Lehmeier Michael [EMAIL PROTECTED]
wrote:
My problem: They have been split at a later time without care, just
brutally hacked
On Sat, 2003-11-29 at 18:03, Steven M. Schultz wrote:
On 29 Nov 2003, Florin Andrei wrote:
In file included from export_yuv4mpeg.c:42:
/usr/include/mjpegtools/yuv4mpeg.h:29:25: mjpeg_types.h: No such file or
directory
/usr/include/mjpegtools/yuv4mpeg.h:33:27: mjpeg_logging.h: No such
On 4 Jan 2004, Florin Andrei wrote:
# pkg-config --cflags mjpegtools
-I/usr/local/include/mjpegtools
Which is wrong, because i installed mjpegtools in /usr not in /usr/local
Then i forced -I/usr/include/mjpegtools to the CFLAGS and all was ok.
This happened when using 1.6.1.92. Please
On Sun, 2004-01-04 at 17:23, Steven M. Schultz wrote:
On 4 Jan 2004, Florin Andrei wrote:
MPEG2 without B frames makes some DVD players choke. The default
What player is so braindamaged and standards non-compliant as to
choke on an *optional* part of the MPEG-2 specs? (B frames are
On 4 Jan 2004, Florin Andrei wrote:
Are you sure that was the cause or was it pusing the bitrate too high
and generating streams out of spec on the peaks? As I recall the
stuttering was caused by -b 9000.
Ok, i can't reproduce the problem now, and i'm using 8500 kbps, so
perhaps
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