Displaying 20 results from an estimated 400 matches similar to: "How to encode with frame offset ?"
2010 Jun 14
4
Live Stream Encoding
Hi There,
i want to stream some pictures out of my application using the Theora
codec. I can stream to a socket or a file. The current work based on the
png2theora example. Something while enconding went wrong: I can see the
whole video in VLC, but the complete duration of the file will not be
displayed. If i play the video in Firefox, the first 2 seconds will not
be played. I think the
2010 Oct 18
3
File size comparisons
Hi all,
I just did a brief test with 3 different codec combinations:
1) ffmpeg sorenson/flv, mp3 audio in flv container
2) ffmpeg h264/vorbis audio/matroska
3) ogg/theora/vorbis using encoder_example
Here are the results:
10721201 2010-10-16 14:46 origem1.flv
20731108 2010-09-13 23:04 origem1.mkv
33101703 2010-10-03 11:24 origem1.ogv
as you can see, flv wins hands down, and it doesn't look
2008 Nov 03
0
No subject
<br>
4) Subtract 1 from the keyframe, then repeat step 3).<br>
<br>
5) Begin reading from the frame discovered in step 4. Drop any packets<br>
which are output on the first page. Count down until we reach the<br>
keyframe, dropping packets until then.<br>
<br>
6) Continue counting down until we reach the target frame, we are now<br>
decoding each
2008 Nov 03
0
No subject
4) Subtract 1 from the keyframe, then repeat step 3).
5) Begin reading from the frame discovered in step 4. Drop any packets
which are output on the first page. Count down until we reach the
keyframe, dropping packets until then.
6) Continue counting down until we reach the target frame, we are now
decoding each frame/packet. At the target frame produce the YUV
output.
Steps 4 and 5 are
2007 Dec 19
1
some questions about swfdec
Hi there,
I am salsaman, main developer of LiVES (http://lives.sf.net), videojack, etc.
I am looking into swfdec with a view to making it accessible to more
projects (for example feeding the output into videojack to allow streaming
over a local lan video network; mixing the swfdec output with other video
sources/effects to allow vjing/capturing the stream, etc).
I have a couple of questions:
2010 Sep 23
2
Ptalarbvorm is now in trunk
We're about ready to do a 1.2 alpha release from the ptalarbvorm tree,
and as such it's no longer experimental. I've replaced the theora svn
trunk with a copy of derf's experimental tree; please do subsequent
development toward the release there.
The old 1.1.x trunk is available as
http://svn.xiph.org/branches/theora-1.1 if you need it.
-r
2009 Jun 20
1
links in videos ?
Hi folks,
I was just looking at this page:
http://www.techcrunch.com/2009/06/09/demo-firefox-35-treats-videos-like-web-pages-why-cant-flash-do-that/
It says there:
"links and other interactive elements can easily be placed inside videos."
I was wondering how this placement of links and other elements was
achieved. Is it something embedded in the ogg/theora stream, or is it
done at
2007 Dec 20
2
Lots of problems playing back !
Hi all,
I got swfdec compiled and running, however there are a lot of problems
running it !
As a test I tried:
swfplay http://www.youtube.com/v/lUR6laFLk0A
First of all I see:
SWFDEC: ERROR: swfdec_codec_gst.c(231): swfdec_gst_decoder_init: failed to
create decoder
SWFDEC: ERROR: swfdec_codec_audio.c(192): swfdec_audio_decoder_new: no
suitable decoder for audio codec 2
SWFDEC: ERROR:
2010 Mar 11
4
Seek issue in cortado player
One of the issues I've consistently run into with the cortado player app is seek behavior, so I was curious to see how cortado handles video encoded with the latest ffmpeg2theora (0.26) and the new -seek-index option, so I tried converting an h.264 video:
ffmpeg2theora tronlegacy-tsr1_480p.mov --seek-index
This output the following advisory messages:
> Allocated 372 bytes for theora
2009 Jul 07
1
Estimate bytes per second from th_info-settings
Hi
Is there a way to estimate the number of bytes per second from the information passed in the th_info-struct to the Theora encoder's th_encode_alloc()? I'm trying to be able to give users a rough estimate of the file size needed to encode with the setting provided to th_info-struct (frame width/height, fps_numerator/fps_denominator, target_bitrate and quality).
-- Bjoern
2008 Nov 11
5
further debugging of my ogg/theora decoder
Hi,
I am continuing to try to debug my ogg/theora decoder.
The issue seems to be that not enough packets are being pulled from the
bitstream, here is some sample output from my player with some debugging
comments put in:
(playback began at first frame, this is from the middle of the clip)
get page at 1765027
got packet
frame++, skip is 0
frame decoded
page processed, kframe=414 : offs=442
get
2010 Jun 04
2
OGGZ Seeking in Theora
Dear all
I'm aware that there have been several discussions about the seeking
issue and I'm sorry to bring this up again.
To solve the problem with Inter-Frame garbage, a seek to the previous
keyframe has to be made. The keyframe number should be extracted from
the granulepos of the frame where we want to seek to. I hope I
understood the theory - unfortunately a few questions have
2009 Oct 19
0
Ohloh think's we're all XML now ...
Bizarre uptick in the amount of XML reported by Ohloh here:
http://www.ohloh.net/p/libguestfs/analyses/latest
Which in one sense is true. We added some example XML output from
virt-inspector to the repository:
$ find -name '*.xml'|xargs wc -l
6822 ./inspector/example1.xml
7323 ./inspector/example2.xml
577 ./inspector/example3.xml
17 ./inspector/example4.xml
2009 Nov 25
2
encoding image from a webcam
I'm trying to encode a picture from my webcam using the theora
codec. The final "product"
must encode a frame, send it over the network and decode it on "the
other side".
For now, it must only work locally so we don't care about the transmission.
This is what I've understood till now: I have a char * buffer from the
camera RG24,I convert it to
YCbCr 4:4:4, I
2009 Jun 11
3
Response to your questions about my suggestions i sent in yesterday
I sent in some suggestions regarding Theora yesterday and I got some
questions from you guys so I'll answer them.?i said this:Theora should
have a feature that disables print screen and video recording software
from capturing Theora videos.?Alot of you asked me about the Fair Use
law. My answer is this. i do know about fair use.?The?problem is, alot of
people don't obey the fair use law as
2009 Dec 15
1
S4 dispatch and S3 "connection" objects
Hello,
I'm trying to get S4 dispatch on S3 "connection" objects.
So I do :
setOldClass( "connection" )
and then :
setGeneric( "bling", function(object) standardGeneric( "bling" ) )
setMethod( "bling", "connection", function(object) cat( "gotcha ",
as.integer(object), "\n" ) )
but I get :
f <- file(
2009 Dec 15
2
split.data.frame
Hello,
I very much enjoy "with" and "subset" semantics for data frames and was
wondering if we could have something similar with split, basically by
evaluating the second argument "with" the data frame :
split.data.frame
function(x, f, drop = FALSE, ...){
call <- match.call( )
fcall <- call( "with", data = call[["x"]],
2010 Aug 15
2
Beginner Hurdles
Hey everyone, I just got Theora running on my Mac, and ran across
several hurdles, that I was wondering if someone could help me with.
I do a lot of tech support at work, and get the same questions over
and over, so I tried skimming the archives but couldn't find the
answers. Maybe these could go in a FAQ of some sort? These are
fairly unavoidable issues that should probably be
2009 Feb 16
2
Theora packets with granulepos of -1
Hello,
I'm just totally confused. In my theora streams encoded using ffmpeg2theora (but also when using my own encoder) I have packets with a granulepos of -1 so I can't identify the packet during a seeking operation correctly. I can also see those strange value when I just print the packet granulepos before sending it to the Theora decoder.
I know why there are PAGES with granularpos of
2009 Jul 08
5
HTML 5 drops open-source video codec
Link here http://news.zdnet.com/2100-9595_22-318208.html
Will H264 become web standard in the future?