Displaying 20 results from an estimated 1000 matches similar to: "python bindings to libtheora"
2010 Jan 21
0
python-theora: some comments
Hi,
here's a list of comments on python-theora:
1) http://certik.github.com/python-theora/module_theora.html#class-theora
uses theora.test_files but setup.py does not install the test files so
using this API fails with
Traceback (most recent call last):
File "browse-video.py", line 4, in <module>
t = theora.Theora(theora.test_files[2])
File "theora.pyx",
2009 Jun 16
2
YCbCr <-> RGB conversion question
Hi,
I coded some routines for YCbCr <-> RGB conversion, both using
floating point numbers and using integer arithmetics, code is
attached.
Let's say I want to convert from RGB to YCbCr and back. First the
integer arithmetics:
In [1]: from colors import *
In [2]: a = [255, 0, 255]
In [3]: RGB2YCbCr(a)
Out[3]: (107, 202, 222)
In [4]: YCbCr2RGB(RGB2YCbCr(a))
Out[4]: array([255, 1,
2009 Jun 15
2
oggz-chop gives segmentation fault
Hi,
I am using oggz-chop in the ubuntu jaunty, am I doing something wrong?
$ oggz-chop -o yt1.ogv -s0 -e500 ondrej.ogv
Segmentation fault
gdb session doesn't reveal much, since it isn't compiled with debugging symbols:
(gdb) bt
#0 0x00007f9e5d2f0092 in memcpy () from /lib/libc.so.6
#1 0x0000000000403698 in ?? ()
#2 0x000000000040262e in ?? ()
#3 0x000000000040285d in ?? ()
#4
2008 Sep 08
1
Bad memory access in libtheora beta3
Hi,
I didn't get to the bottom of it, but Valgrind is whining
on libtheora when encoding a video to a 16 width or
16 height video. While you may think I'm weird for
encoding to such a size, I didn't care about the output
video, but I reckon it should work. The bad accesses
seemed to be of pixel data, in FilterVert__c, and in
FilterHorz__c (from memory), but I didn't investigate
2009 Aug 11
3
blocky issue here with libtheora 1.1 20090806 (Thusnelda)
this sample is very blocky, the older version seems to do much better
and less blocky video. i'm not sure if my 1.9ghz 1 gb ram is the problem
here or the encoder has hicups on this new libtheora 1.1 20090806
(Thusnelda). please advice how to fix this or should i use the older
version. this encode was 2 pass with horrible output.
http://www.megaupload.com/?d=NDGY0EAL
General
ID
2010 Apr 14
1
Cannot connect matroska splitter to theora encoder
Hi everyone,
I face a problem trying to encode a mkv file into theora using directshow
filters
I have a mkv file containing only video encoded in YUY2.
I use the DirectShowNet Lib V2.1 (
<http://sourceforge.net/projects/directshownet/files/>
http://sourceforge.net/projects/directshownet/files/)
I use the matroska splitter directshow filter v1.0.2.9 (
2009 Jun 16
1
mixing effects when joining videos
Hi,
what is the best way to go about mixing effects when joining two
videos, like crossfading?
Once I have the individual images as numpy arrays, the mixing itself
is the easy part (I'll just use numpy + scipy for that, or any other
python lib). However, it's not clear to me how (and especially when)
to handle decoding and encoding properly.
So lets say I create a video tutorial
2009 Jun 15
0
python bindings update
Hi,
here is a webpage for the Python bindings:
http://certik.github.com/python-theora/
Changes since the last time:
* tests added, e.g. there is a script that downloads some theora tests
videos and then I test the python wrappers on them
* every single method has a docstring with a doctested example
* sphinx documentation added, see the link above
* couple minor changes, like better control
2010 Apr 30
3
Ogv file only plays in VLC / Can't be used by most tools.
Hi,
I'm new here - thanks for having me. (Sorry if I'm in the wrong place or a noob.)
I downloaded the Theora encoder sample (ver 1.1.1), modified it to encode a sequence of bitmaps, and created an OGV file.
The OGV file plays fine in the latest VLC (1.0.5), but I can't do much else with it:
I tried uploading to YouTube, and the video just comes out really corrupt:
2012 Jul 01
2
can't demux with ogminfo / need to re-pac OGV to MKV
Hello,
I need to demux video files created with ffmpeg2theora 0.28+svn18147
I have ogminfo v1.5
and getting this error
(ogminfo.c) OGG stream 1 is of an unknown type (bad header?)
(ogminfo.c) OGG stream 2 is of an unknown type (bad header?)
(ogminfo.c) (a1/serial 1092562206) Vorbis audio (channels 2 rate 48000)
Is possible, that ogminfo is older then ffmpeg2theora ? Or what can be the reason?
2009 Jun 20
3
DVD NTSC video plays twice as fast when encoded with libtheora
https://roundup.ffmpeg.org/roundup/ffmpeg/issue1197
I had originally encountered this problem using ffmpeg2theora. I
switched to ffmpeg proper in an attempt to identify where the problem
was at, and found that the problem persisted. As a result I had
thought this was a problem with ffmpeg, but the ffmpeg folks seem to
indicate that this is specific to Theora (too much finger pointing I
think.) I
2009 Dec 03
2
Theora processing at server side : Removing non-needed frames
May somebody give me link for server side processing of ogg video by php or
ruby or anything else.
Let me tell my purpose,
I have made a image splitter of ogg video - You can view it at
http://jsbin.com/ihebo (basic coding )
just play the video and there is a button call "snapit", which will take
current frame.
At the end of this process, I will upload all timing info at server.
2009 Jun 16
2
Further bug discovered with the Directshow decoder
Hi good people,
Just to inform:
I finally fed FFMpeg2Theora with a .VOB input, and the .OGV output produced played back beautifully in VLC, both audio and video. However, the same output .OGV file gave clicks and pops in the audio when fed through Directshow programs. I played it through Windows Mediaplayer as well as through Winamp, with the same crackles in the audio, and this leads me to
2009 Jul 16
5
Add an intro to a theora file without re-encoding?
Hello,
I would like to add a introduction video (typically a title with fade-in
/ fade-out) at the beginning of an Ogg/Theora video. I generated this
intro video in Ogg/Theora from a sequence of png files.
I would need to do this in an automatic script, because I have many such
videos to process, and without doing any re-encoding step (which would
be very costly because my videos are huge).
I
2010 Mar 05
2
ffmpeg2theora bug: generation of a video from a series of images
Hi J.,
We are using ffmpeg2theora to produce an introduction video from a
series of images:
ffmpeg2theora-0.26.linux32.bin images/img-%03d.png -o intro.ogv
The video that we get is huge and horrible, with lots of blinking colors:
http://free-electrons.com/issues/ffmpeg2theora-mar5-2010/intro.ogv
Here's what we had in the past:
2009 Jun 29
3
oggz-merge.exe
Hi folks,I'm joining this list because I've encountered difficulties with
the ogg tools.
I'm running Windows, and can't find binaries for liboggz tools, such as
oggz-merge.exe
Can someone provide oggz-merge.exe?
So I use ffmpeg (v19289) for muxing
ffmpeg -y -i sync2.ogg -i sync.ogv -vcodec copy -acodec copy sync2.ogv
but the framerate fluctuates wildly on playback, and ogginfo
2009 Dec 10
2
Fwd: Vorbis-java wav-ogg encoder produces distorted OGG file
Hi,
I was really interested in the java version of the same since I wanted to
use it in my java application in a platform independent way.
Anybody who have managed to use the java port to encode wav to ogg, this is
only audio, can assist me to solve my problem. I have been looking at the
code and the svn but no updates seem to be available. Some guidance on what
could be the problem on the source
2010 Apr 12
7
Theora player for Nokia Series 60
I've made a start writing a Theora player for Series 60 phones (mostly Nokia phones, but some Samsung and Sony Ericsson ones too).
Download here:
http://symbianoggplay.sourceforge.net/OgvPlay/OgvPlay_010.zip
I've been using Big Buck Bunny, Elephants Dream and a few other ogv files for testing. I've uploaded 320x180 versions of those here:
2010 Jan 13
3
Live webcam stream with Theora
Hey all,
I've setup a simple page that just displays a live webcam stream of me
at work, and it supposedly falls back onto Cortado if your browser
doesn't support the <video> tag. The URL is here:
http://media.basilgohar.com/stream/
There's been a lot of talk about live streaming and low bitrate
streams. Here is my command line (I've posted this before):
time ffmpeg -f
2009 Jun 15
2
Strange results encoding with latest ffmpeg2theora-0.24 and playback on Directshow through Winamp
Hi Folks,
First, I would like to thank the eople in development who are doing so much to develope these great video and audio tools.
I use Ogg Vorbis to store most of my music projects in studio and the results are stunning. Quite frankly, in the audio file reduction game, nothing beats Ogg Vorbis and I can personally say this from my own experience. So a huge thank you to the team.
I've