VP3 to Theora - Revision history

Pmsyyz: cleanup

2008-07-06T21:59:32Z

cleanup

← Older revision		Revision as of 21:59, 6 July 2008
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	~~== About ==~~		This is a quick guide to show how to transcode [[VP3]] (usually with [[MP3]] audio) to [[Theora]].


	This is a quick ~~guid~~ to show how to transcode VP3 (usually with MP3) to Theora.

	Now, this quick guide involves a lot of tools which are either experimental or are known to be buggy. Beware. Use with caution.		Now, this quick guide involves a lot of tools which are either experimental or are known to be buggy. Beware. Use with caution.
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	== NSV ==		== NSV ==

	If your video is encapsulated in NSV you first need to remux it to AVI:		If your video is encapsulated in [[NSV]] you first need to remux it to [[AVI]]:

	mencoder -oac copy -ovc copy -fafmttag 0x55 -o vp31.avi input.nsv		mencoder -oac copy -ovc copy -fafmttag 0x55 -o vp31.avi input.nsv
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	== Get the Theora code ==		== Get the Theora code ==

	Download the Theora source code (svn co http://svn.xiph.org/trunk/theora).		Download the Theora source code: <tt>svn co http://svn.xiph.org/trunk/theora</tt>

	== Build the avi2vp3 tool ==		== Build the avi2vp3 tool ==
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	Copy theora/win32/experimental/transcoder/transcoder_example.c to theora/examples/encoder_example.c - this will replace the usual Theora encoder example with the application creating a Theora stream from the raw VP3 data.		Copy theora/win32/experimental/transcoder/transcoder_example.c to theora/examples/encoder_example.c - this will replace the usual Theora encoder example with the application creating a Theora stream from the raw VP3 data.


	Configure your copy of Theora (run autogen.sh). This has a few dependencies. The configuration process will guide you. Be patient. Once configuration didn't complain because of missing dependencies: Invoke make.		Configure your copy of Theora (run autogen.sh). This has a few dependencies. The configuration process will guide you. Be patient. Once configuration didn't complain because of missing dependencies: Invoke make.

Pmsyyz: Vp3toTheora moved to VP3 to Theora

2008-07-06T21:57:44Z

Vp3toTheora moved to VP3 to Theora

← Older revision		Revision as of 21:57, 6 July 2008
(No difference)

Saoshyant at 23:00, 3 February 2008

2008-02-03T23:00:54Z

← Older revision		Revision as of 23:00, 3 February 2008
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	If the VP3 video input has dropped frames (this is common on broadcasted videos with narrow bandwidth constraints) you may notice that the created Theora file is distorted in affected parts of the video (apparently because the information that frames were dropped is lost, thus some video frames predict from the wrong predecessors).		If the VP3 video input has dropped frames (this is common on broadcasted videos with narrow bandwidth constraints) you may notice that the created Theora file is distorted in affected parts of the video (apparently because the information that frames were dropped is lost, thus some video frames predict from the wrong predecessors).

			[[Category:Theora]]

Maikmerten at 11:48, 27 January 2008

2008-01-27T11:48:32Z

← Older revision		Revision as of 11:48, 27 January 2008
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	== About ==		== About ==

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	== NSV ==		== NSV ==

	If your ~~Video~~ is encapsulated in NSV you first need to remux it to AVI:		If your video is encapsulated in NSV you first need to remux it to AVI:

	mencoder -oac copy -ovc copy -fafmttag 0x55 -o vp31.avi input.nsv		mencoder -oac copy -ovc copy -fafmttag 0x55 -o vp31.avi input.nsv

			You can skip this step if your input file already is an AVI.

	== Get the Theora code ==		== Get the Theora code ==
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	theora.ogg now should be a valid Theora + Vorbis Ogg file. Congratulations!		theora.ogg now should be a valid Theora + Vorbis Ogg file. Congratulations!

			== Bugs ==

			If the VP3 video input has dropped frames (this is common on broadcasted videos with narrow bandwidth constraints) you may notice that the created Theora file is distorted in affected parts of the video (apparently because the information that frames were dropped is lost, thus some video frames predict from the wrong predecessors).

Maikmerten: /* Process your videos */

2008-01-27T11:31:30Z

Process your videos

← Older revision		Revision as of 11:31, 27 January 2008
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	== Process your videos ==		== Process your videos ==

	* Use avi2vp3 to convert your VP3 AVI. The input file must be named vp31.avi, the output file will always be ~~output~~.vp3		* Use avi2vp3 to convert your VP3 AVI. The input file must be named vp31.avi, the output file will always be outfile.vp3
	* Use transcoder_example to create an Ogg Theora stream: transcoder_example ~~output~~.vp3 > video.ogg		* Use transcoder_example to create an Ogg Theora stream: transcoder_example outfile.vp3 > video.ogg
	* Use e.g. mplayer to decode the audio in the AVI file: mplayer -vo null -ao pcm vp31.avi		* Use e.g. mplayer to decode the audio in the AVI file: mplayer -vo null -ao pcm vp31.avi
	* The audio will be in audiodump.wav. Encode it with e.g. oggenc: oggenc -q 1 audiodump.wav		* The audio will be in audiodump.wav. Encode it with e.g. oggenc: oggenc -q 1 audiodump.wav

Maikmerten: /* Process your videos */ grammar

2008-01-26T16:51:44Z

Process your videos: grammar

← Older revision		Revision as of 16:51, 26 January 2008
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	== Process your videos ==		== Process your videos ==

	* Use avi2vp3 to ~~converter~~ your VP3 AVI. The input file must be named vp31.avi, the output file will always be output.vp3		* Use avi2vp3 to convert your VP3 AVI. The input file must be named vp31.avi, the output file will always be output.vp3
	* Use transcoder_example to create an Ogg Theora stream: transcoder_example output.vp3 > video.ogg		* Use transcoder_example to create an Ogg Theora stream: transcoder_example output.vp3 > video.ogg
	* Use e.g. mplayer to decode the audio in the AVI file: mplayer -vo null -ao pcm vp31.avi		* Use e.g. mplayer to decode the audio in the AVI file: mplayer -vo null -ao pcm vp31.avi

Maikmerten: slight wikify

2008-01-26T16:50:07Z

slight wikify

← Older revision		Revision as of 16:50, 26 January 2008
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			== About ==


	This is a quick guid to show how to transcode VP3 (usually with MP3) to Theora.		This is a quick guid to show how to transcode VP3 (usually with MP3) to Theora.

	Now, this quick guide involves a lot of tools which are either experimental or are known to be buggy. Beware. Use with caution.		Now, this quick guide involves a lot of tools which are either experimental or are known to be buggy. Beware. Use with caution.

			== NSV ==

	If your Video is encapsulated in NSV you first need to remux it to AVI:		If your Video is encapsulated in NSV you first need to remux it to AVI:

	mencoder -oac copy -ovc copy -fafmttag 0x55 -o vp31.avi input.nsv		mencoder -oac copy -ovc copy -fafmttag 0x55 -o vp31.avi input.nsv

			== Get the Theora code ==

	Download the Theora source code (svn co http://svn.xiph.org/trunk/theora).		Download the Theora source code (svn co http://svn.xiph.org/trunk/theora).

			== Build the avi2vp3 tool ==

	Go to theora/win32/experimental/transcoder/avi2vp3/		Go to theora/win32/experimental/transcoder/avi2vp3/
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	Compile the tool which will extract the VP3 data out of your AVI file: gcc *.c -o avi2vp3		Compile the tool which will extract the VP3 data out of your AVI file: gcc *.c -o avi2vp3

			== Build transcoder_example ==

			Copy theora/win32/experimental/transcoder/transcoder_example.c to theora/examples/encoder_example.c - this will replace the usual Theora encoder example with the application creating a Theora stream from the raw VP3 data.

	Cpy theora/win32/experimental/transcoder/transcoder_example.c to theora/examples/encoder_example.c - this will replace the usual Theora encoder example with the application creating a Theora stream from the raw VP3 data.

	~~Build~~ your copy of Theora (run autogen.sh). This has a few dependencies. The configuration process will guide you. Be patient.		Configure your copy of Theora (run autogen.sh). This has a few dependencies. The configuration process will guide you. Be patient. Once configuration didn't complain because of missing dependencies: Invoke make.

	After everything compiled you should rename the encoder_example binary (which is in the examples directory) to e.g. transcoder_example to avoid confusion.		After everything compiled you should rename the encoder_example binary (which is in the examples directory) to e.g. transcoder_example to avoid confusion.

			== Process your videos ==

	* Use avi2vp3 to converter your VP3 AVI. The input file must be named vp31.avi, the output file will always be output.vp3		* Use avi2vp3 to converter your VP3 AVI. The input file must be named vp31.avi, the output file will always be output.vp3

Maikmerten: initial version, TODO: Wikify

2008-01-26T16:46:42Z

initial version, TODO: Wikify

New page

This is a quick guid to show how to transcode VP3 (usually with MP3) to Theora.

Now, this quick guide involves a lot of tools which are either experimental or are known to be buggy. Beware. Use with caution.

If your Video is encapsulated in NSV you first need to remux it to AVI:

mencoder -oac copy -ovc copy -fafmttag 0x55 -o vp31.avi input.nsv

Download the Theora source code (svn co http://svn.xiph.org/trunk/theora).

Go to theora/win32/experimental/transcoder/avi2vp3/

Compile the tool which will extract the VP3 data out of your AVI file: gcc *.c -o avi2vp3

Cpy theora/win32/experimental/transcoder/transcoder_example.c to theora/examples/encoder_example.c - this will replace the usual Theora encoder example with the application creating a Theora stream from the raw VP3 data.

Build your copy of Theora (run autogen.sh). This has a few dependencies. The configuration process will guide you. Be patient.

After everything compiled you should rename the encoder_example binary (which is in the examples directory) to e.g. transcoder_example to avoid confusion.

* Use avi2vp3 to converter your VP3 AVI. The input file *must* be named vp31.avi, the output file will always be output.vp3
* Use transcoder_example to create an Ogg Theora stream: transcoder_example output.vp3 > video.ogg
* Use e.g. mplayer to decode the audio in the AVI file: mplayer -vo null -ao pcm vp31.avi
* The audio will be in audiodump.wav. Encode it with e.g. oggenc: oggenc -q 1 audiodump.wav
* Now you need to combine video.ogg and audiodump.ogg. Use oggzmerge from the oggz-tools package (at least in Ubuntu it's oggz-tools): oggzmerge video.ogg audiodump.ogg > theora.ogg

theora.ogg now should be a valid Theora + Vorbis Ogg file. Congratulations!