Kostya: add description

2021-02-27T10:22:07Z

add description

← Older revision		Revision as of 03:22, 27 February 2021
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	IVR is a recorded media format created by Real Player 11.		IVR is a recorded media format created by Real Player 11.

			The file can either be a single record (starting with <code>.REC</code> magic) or a collection of records (starting with <code>.R1M</code> magic).

			Data is stored in big-endian format.

			=== R1M header ===

			4 bytes - .R1M
			3 bytes - unknown, always 0, 1, 1 ?
			4 bytes - file name length
			N bytes - file name
			1 byte - always 0?
			4 bytes - additional header length
			8 bytes - entries offset

			Entries start with a byte containing entry type and 4-byte payload size, the rest of data is interpreted depending on it:
			* 1 - some metadata, probably for the following sub-recording
			* 2 - sub-recording in <code>REC</code> format with some additional header
			* 82 (or <code>'R'</code>) - signals that this is really some <code>RJMx</code> metadata chunks at the end of file

			=== REC format ===
			The format consists of header and entries with different payload like stream metadata or data packets, a lot like e.g. [[FLV]].

			Header:

			4 bytes - .REC
			1 byte - always zero?
			4 bytes - number of entries

			Each entry starts with a byte specifying its payload type:
			* 1 - stream properties, payload starts with 32-bit number of properties, the properties are in the same format as <code>.REC</code> entries themselves (types 3-5);
			* 2 - packet:
			4 bytes - timestamp
			2 bytes - stream ID
			4 bytes - packet flags
			4 bytes - packet payload length
			4 bytes - header fields checksum?
			N bytes - RealMedia packet payload
			* 3 - integer record:
			4 bytes - key name length
			N bytes - key name
			4 bytes - value length (should be 4)
			4 bytes - integer value
			* 4 - binary data:
			4 bytes - key name length
			N bytes - key name
			4 bytes - value length
			M bytes - binary data value
			* 5 - string data
			4 bytes - key name length
			N bytes - key name
			4 bytes - value length
			M bytes - value string
			* 6 - header end marker
			* 7 - data end marker, has 8 zero bytes of payload
			* 8 - data start marker, has 8 zero bytes of payload

			Normally the structure for the recording is the following:

			* several entries with types 3-5 for recording metadata
			* one or more stream properties
			** each has several sub-entries with types 3-5 for stream metadata
			* header end marker
			* three 4-byte offsets
			* seek table (if signalled to be present in the metadata)
			* data start marker
			* one or more packets
			* data end marker

	[[Category:Container Formats]]		[[Category:Container Formats]]

Pbm: Implemented in FFmpeg

2017-02-22T15:59:20Z

Implemented in FFmpeg

← Older revision		Revision as of 08:59, 22 February 2017
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	[[Category:Container Formats]]		[[Category:Container Formats]]
	~~[[Category:Formats missing in FFmpeg]]~~

Compn at 03:00, 1 May 2010

2010-05-01T03:00:29Z

← Older revision		Revision as of 20:00, 30 April 2010
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	*Company: [[Real]]		*Company: [[Real]]
	*Sample: http://~~www~~.~~skyshedpod~~.~~com~~/~~SherwinWilliamsCommercial.~~ivr		*Sample: http://samples.mplayerhq.hu/real/ivr/

	IVR is a recorded media format created by Real Player 11.		IVR is a recorded media format created by Real Player 11.

Compn at 00:09, 25 May 2009

2009-05-25T00:09:10Z

← Older revision		Revision as of 17:09, 24 May 2009
Line 5:		Line 5:

	[[Category:Container Formats]]		[[Category:Container Formats]]
			[[Category:Formats missing in FFmpeg]]

Compn: skeleton real player format desc

2009-05-25T00:06:20Z

skeleton real player format desc

New page

*Company: [[Real]]
*Sample: http://www.skyshedpod.com/SherwinWilliamsCommercial.ivr

IVR is a recorded media format created by Real Player 11.

[[Category:Container Formats]]

IVR - Revision history

Kostya: add description

Pbm: Implemented in FFmpeg

Compn at 03:00, 1 May 2010

Compn at 00:09, 25 May 2009

Compn: skeleton real player format desc