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Questions tagged [ogg-theora]

Questions related to Theora video codec, encapsulated in Ogg Container format. Theora is a free lossy video compression format. It is developed by the Xiph.Org Foundation and distributed without licensing fees alongside their other free and open media projects, including the Vorbis audio format and the Ogg container.

Theora is a free lossy video compression format. It is developed by the Xiph.Org Foundation and distributed without licensing fees alongside their other free and open media projects, including the Vorbis audio format and the Ogg container.

More details at

  1. http://www.theora.org/
  2. http://en.wikipedia.org/wiki/Theora
33 questions
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HTML5 video (mp4 and ogv) problems in Safari and Firefox - but Chrome is all good

I have the following code:
37
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2 answers

WebM vs. Ogg Theora

How would one compare Ogg Theora and WebM against the following parameters:- Efficiency of compression Efficiency of computation Issues in Wider adaptability (why wouldn't someone make a hardward chip that does Ogg or WebM transcoding; like it is…
caleb531
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3 answers

Best video format for HTML5?

I've got a set of videos that are going to be posted on a new site I'm developing, using our new html5 player. I know Firefox only supports .ogg format, whereas most others (including eventually IE9) support h264. I'm looking to tap into the…
CodeMoose
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6
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2 answers

HTML5 Video OGV conversion on Mac

When I try recording a screencast with Quicktime or Screenflow and then converting to .ogv for use on the web, I get this error many times: $ ffmpeg2theora test.mov [audioresample @ 0x7fa903800ee0] Audio sample format conversion failed The…
Loren
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5 answers

Best way to implement HTML5 video

I understand that HTML5 video is way more complicated than its proponents would like us to believe. Safari uses the proprietary H.264 codec, whereas Firefox, Chrome and Opera all support the open-source Theora. Internet Explorer doesn't support…
Chuck Le Butt
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5
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2 answers

How to write bitmaps as frames to Ogg Theora in C\C++?

How to write bitmaps as frames to Ogg Theora in C\C++? Some Examples with source would be grate!)
Rella
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4
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2 answers

Opera and HTML5 video

On my website, I have video in mp4 and ogv formats. mp4 plays in webkit browsers. ogv plays in Firefox, but don't want in Opera. There is a trivial HTML:
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1 answer

How to multiplex Vorbis and Theora streams using libogg

I am currently writing a simple Theora video encoder, which uses libogg, libvorbis and libtheora. Currently, I can submit frames to the Theora encoder, and PCM samples to the Vorbis encoder, pass the resulting packets to Ogg streams (one for Theora…
Thalex
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C# Theora encoder?

I want to live stream images I receive from a third party service to a HTML5 video. Looks like the best option is to encode the images in the theora format. Anyone knows a good theora encoder for c#
Anders
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Understanding (and reencoding) duration and seeking in .ogv files?

I use recordMyDesktop v0.3.8.1 on Ubuntu 11.04 to capture an .ogv of my session. After I'm done, I open the .ogv in VLC media player 1.1.9 The Luggage; this is how it looks like: ... notably, there is no lenght - and additionally, seeking is…
sdaau
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Playing Video in SDL 2.0.4 (Theora)

I'm using: UBUNTU 14.04 + SDL 2.0.4 + Code::Blocks 13.12 - (C++) - linked to libtheora.a (v.1.1.1) TARGET: To be able to play (decode) Ogg Theora video in an SDL2 application. I could use ffmpeg library. But there are licences issues because they…
Jorge Rosa
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1 answer

Automatic YUV -> RGB in DirectShow for custom decoder

after hours of searching on the net I'm quite desperate to find solution for this. I've up & running OGG Theora decoder in DirectShow which ouputs YV12 and YUY2 color models. Now, I want to make a RGB pixel manipulation filter for this output and…
Miro Kropacek
3
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1 answer

Multi core theora encoding

We convert uploaded video to MP4 and OGV, but while trying to speed up the process we've hit a wall. We found the bottleneck is the OGV encoding, While it might take 5 minutes to convert a 350mb AVI to MP4, it takes roughly 25-30 minutes to convert…
Jamie Taylor
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1 answer

Improving the visual quality of Theora when using Xuggler

I'm looking for fellow users, who are using Xuggler to produce video encoded with Theora. I've tried a lot of different options to get "good" quality using presets to no avail. I would love to get quality anywhere close to what I can produce with…
Paul Gregoire
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How do I split an OGX (video) file?

I'm trying to make a PHP script that will deliver a given .ogx file based on a seek position (transmited as a parameter to the script). The purpose is to make a HTML5 video player with server-side seeking functions. I have studied the container…
Andrei
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