Questions tagged [theora]

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How to convert h.264 (MP4) to Theora (FFmpeg)

How to convert h.264 to Theora using FFmpeg. I generally use all the -qscale commands etc, but the quality is hopeless anyway. The point is that the movie freezes after a few seconds and only ...
Eqsz's user avatar
  • 31
2 votes
2 answers
2k views

Remove video / Extract audio from Ogg Theora Video to Ogg Vorbis

I have some songs that are in .ogg format but they also contain video (which just shows the album cover the whole song, if played in a video player). How can I losslessly remove the video part of the ...
ZN13's user avatar
  • 860
0 votes
1 answer
1k views

How do I check the video bitrate of an Ogg Theora (ogv) video file?

I've been sent an .ogv file by a video company that's 4 times the file size of the equivalent MP4 file. I suspect they've encoded it at way too high a bitrate, but I'd like to check for sure. I'm on ...
moloko's user avatar
  • 103
0 votes
0 answers
112 views

Encoding to WebM and OggVorbis without changing original dimensions?

Trying to convert original Quicktime.movs to both WEbM and OggVorbis-Theora formats. Was using the free Miro video converter but when it converts it always uses preset sizes. Is there any way of ...
Bachalo's user avatar
  • 2,527
0 votes
0 answers
866 views

A way to stream from a v4l2 device?

I have a Arch Linux server and I'm currently using the mjpeg format to stream a security camera. The problem is that mjpeg is a bad format in terms of compression. It compress frames individually so ...
tomm89's user avatar
  • 239
4 votes
2 answers
3k views

Is there a way to enable H.264 video in Firefox?

I know that Mozilla has taken an ideological stance against H.264 video, but I don't agree with it. (And I think I paid for a hardware decoder inside my graphics card anyway?) Is there any way I can ...
endolith's user avatar
  • 7,517
1 vote
0 answers
285 views

Export iMovie 09/10 Project to Theora with 720p resolution

I select "export with QuickTime" Choose - OGG "Xiph Theora" is selected as codec. Actually, it's alone in the list of codecs. That's what i need. I can adjust quality, FPS ... but resolution ...
AntonAL's user avatar
  • 713
0 votes
2 answers
193 views

What kind of OpenSource solution to do video streaming? [closed]

I am looking for a solution to do streaming of 5 videos streams (with audio) on the Internet. What kind of OpenSource can I use ? I heard about Red5 but we need Flash Player. Is it yet possible do to ...
Natim's user avatar
  • 1,659
0 votes
1 answer
637 views

Does Theora Decoder in libavcodec (FFMPEG V0.5) support YUV422 YUV444 modes?

I am working on theora decoder in ffmpeg V0.5. When i try to decode a 422 or 444 ogg/ogv bit stream using ffmpeg, the output yuv is junk. When i checked the ffmpeg source code, i saw that a pixel ...
goldenmean's user avatar
  • 2,447
1 vote
1 answer
735 views

Does ffmpeg version 0.5 configured on linux support encoding using Theora codec?

I have configured, compiled a ffmpeg source code version 0.5 with versions as below: FFmpeg version 0.5, Copyright (c) 2000-2009 Fabrice Bellard, et al. configuration: --enable-memalign-hack ...
goldenmean's user avatar
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