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minor corrections

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Original commit message from CVS:
minor corrections
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David Schleef 2003-06-30 05:13:26 +00:00
parent 4efcdf17bb
commit 491741f564
1 changed files with 9 additions and 3 deletions
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12
docs/random/mimetypes
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@ -28,6 +28,9 @@ GstCaps *caps = GST_CAPS_NEW("video_mpeg_type",
Obviously, mimetypes and their corresponding properties are of major Obviously, mimetypes and their corresponding properties are of major
importance in GStreamer for uniquely identifying media streams. importance in GStreamer for uniquely identifying media streams.
Official MIME media types are assigned by the IANA. Current
assignments are at http://www.iana.org/assignments/media-types/.
2) The problems 2) The problems
--------------- ---------------
Some streams may have mimetypes or GstCaps that do not fully describe Some streams may have mimetypes or GstCaps that do not fully describe
@ -57,7 +60,7 @@ There are several types of media streams. The most important distinction
will be container formats, audio codecs and video codecs. Container will be container formats, audio codecs and video codecs. Container
formats are bytestreams that contain one or more substreams inside it, formats are bytestreams that contain one or more substreams inside it,
and don't provide any direct media data itself. Examples are Quicktime, and don't provide any direct media data itself. Examples are Quicktime,
AVI or MPEG (bytestream). They mostly contain of a set of headers that AVI or MPEG System Stream. They mostly contain of a set of headers that
define the media stream(s) that is packed inside the container and the define the media stream(s) that is packed inside the container and the
media data itself. media data itself.
Video codecs and audio codecs describe encoded audio or video data. Video codecs and audio codecs describe encoded audio or video data.
@ -116,6 +119,7 @@ Preface - (optional) properties for all video formats:
mimetype: video/x-raw-yuv mimetype: video/x-raw-yuv
properties: 'format' = 'XXXX' (fourcc) properties: 'format' = 'XXXX' (fourcc)
known fourccs: YUY2, I420, Y41P, YVYU, UYVY, etc. known fourccs: YUY2, I420, Y41P, YVYU, UYVY, etc.
properties 'width' and 'height' are required
Note: some raw video formats have implicit alignment rules. We should Note: some raw video formats have implicit alignment rules. We should
discuss this more. discuss this more.
@ -147,6 +151,7 @@ Preface - (optional) properties for all video formats:
'red_mask' = bitmask (0x..) (INT) <- red pixel mask 'red_mask' = bitmask (0x..) (INT) <- red pixel mask
'green_mask' = bitmask (0x..) (INT) <- green pixel mask 'green_mask' = bitmask (0x..) (INT) <- green pixel mask
'blue_mask' = bitmask (0x..) (INT) <- blue pixel mask 'blue_mask' = bitmask (0x..) (INT) <- blue pixel mask
properties 'width' and 'height' are required
'bpp' is the number of bits of memory used for each pixel. 'depth' 'bpp' is the number of bits of memory used for each pixel. 'depth'
is the color depth. is the color depth.
@ -216,7 +221,8 @@ Preface - (optional) properties for all video formats:
known fourccs: H263, i263, M263, x263, VDOW, VIVO known fourccs: H263, i263, M263, x263, VDOW, VIVO
9 - RealVideo (Real) 9 - RealVideo (Real)
mimetype: video/x-real mimetype: video/x-pn-realvideo
known fourccs: RV10, RV20, RV30
10 - Digital Video (DV) 10 - Digital Video (DV)
mimetype: video/dv mimetype: video/dv
@ -327,7 +333,7 @@ Preface - (optional) properties for all audio formats:
refer to technical documentation. refer to technical documentation.
13 - RealAudio (Real) 13 - RealAudio (Real)
mimetype: audio/x-real mimetype: audio/x-pn-realaudio
properties: 'bitrate' = 14400/28800 (INT) properties: 'bitrate' = 14400/28800 (INT)
14 - DV Audio 14 - DV Audio