-ivtv release notes
-==================
+The ivtv driver
+===============
+
+Author: Hans Verkuil <hverkuil@xs4all.nl>
This is a v4l2 device driver for the Conexant cx23415/6 MPEG encoder/decoder.
The cx23415 can do both encoding and decoding, the cx23416 can only do MPEG
encoding. Currently the only card featuring full decoding support is the
Hauppauge PVR-350.
-NOTE: this driver requires the latest encoder firmware (version 2.06.039, size
-376836 bytes). Get the firmware from here:
+.. note::
+
+ #) This driver requires the latest encoder firmware (version 2.06.039, size
+ 376836 bytes). Get the firmware from here:
-http://dl.ivtvdriver.org/ivtv/firmware/
+ https://linuxtv.org/downloads/firmware/#conexant
-NOTE: 'normal' TV applications do not work with this driver, you need
-an application that can handle MPEG input such as mplayer, xine, MythTV,
-etc.
+ #) 'normal' TV applications do not work with this driver, you need
+ an application that can handle MPEG input such as mplayer, xine, MythTV,
+ etc.
The primary goal of the IVTV project is to provide a "clean room" Linux
Open Source driver implementation for video capture cards based on the
iCompression iTVC15 or Conexant CX23415/CX23416 MPEG Codec.
-Features:
+Features
+--------
+
* Hardware mpeg2 capture of broadcast video (and sound) via the tuner or
S-Video/Composite and audio line-in.
* Hardware mpeg2 capture of FM radio where hardware support exists
this into the captured MPEG stream.
* Supports raw YUV and PCM input.
-Additional features for the PVR-350 (CX23415 based):
+Additional features for the PVR-350 (CX23415 based)
+---------------------------------------------------
+
* Provides hardware mpeg2 playback
* Provides comprehensive OSD (On Screen Display: ie. graphics overlaying the
video signal)
* Supports raw YUV output.
IMPORTANT: In case of problems first read this page:
- http://www.ivtvdriver.org/index.php/Troubleshooting
+ https://help.ubuntu.com/community/Install_IVTV_Troubleshooting
-See also:
+See also
+--------
-Homepage + Wiki
-http://www.ivtvdriver.org
+https://linuxtv.org
IRC
-irc://irc.freenode.net/ivtv-dev
+---
+
+irc://irc.freenode.net/#v4l
----------------------------------------------------------
Devices
-=======
+-------
A maximum of 12 ivtv boards are allowed at the moment.
card has a radio tuner or not.
Here is a list of the base v4l devices:
-crw-rw---- 1 root video 81, 0 Jun 19 22:22 /dev/video0
-crw-rw---- 1 root video 81, 16 Jun 19 22:22 /dev/video16
-crw-rw---- 1 root video 81, 24 Jun 19 22:22 /dev/video24
-crw-rw---- 1 root video 81, 32 Jun 19 22:22 /dev/video32
-crw-rw---- 1 root video 81, 48 Jun 19 22:22 /dev/video48
-crw-rw---- 1 root video 81, 64 Jun 19 22:22 /dev/radio0
-crw-rw---- 1 root video 81, 224 Jun 19 22:22 /dev/vbi0
-crw-rw---- 1 root video 81, 228 Jun 19 22:22 /dev/vbi8
-crw-rw---- 1 root video 81, 232 Jun 19 22:22 /dev/vbi16
+
+.. code-block:: none
+
+ crw-rw---- 1 root video 81, 0 Jun 19 22:22 /dev/video0
+ crw-rw---- 1 root video 81, 16 Jun 19 22:22 /dev/video16
+ crw-rw---- 1 root video 81, 24 Jun 19 22:22 /dev/video24
+ crw-rw---- 1 root video 81, 32 Jun 19 22:22 /dev/video32
+ crw-rw---- 1 root video 81, 48 Jun 19 22:22 /dev/video48
+ crw-rw---- 1 root video 81, 64 Jun 19 22:22 /dev/radio0
+ crw-rw---- 1 root video 81, 224 Jun 19 22:22 /dev/vbi0
+ crw-rw---- 1 root video 81, 228 Jun 19 22:22 /dev/vbi8
+ crw-rw---- 1 root video 81, 232 Jun 19 22:22 /dev/vbi16
Base devices
-============
+------------
For every extra card you have the numbers increased by one. For example,
/dev/video0 is listed as the 'base' encoding capture device so we have:
- /dev/video0 is the encoding capture device for the first card (card 0)
- /dev/video1 is the encoding capture device for the second card (card 1)
- /dev/video2 is the encoding capture device for the third card (card 2)
+- /dev/video0 is the encoding capture device for the first card (card 0)
+- /dev/video1 is the encoding capture device for the second card (card 1)
+- /dev/video2 is the encoding capture device for the third card (card 2)
Note that if the first card doesn't have a feature (eg no decoder, so no
video16, the second card will still use video17. The simple rule is 'add
'ivtv_first_minor' module option can be used for that.
-/dev/video0
-The encoding capture device(s).
-Read-only.
+- /dev/video0
+
+ The encoding capture device(s).
+
+ Read-only.
+
+ Reading from this device gets you the MPEG1/2 program stream.
+ Example:
+
+ .. code-block:: none
+
+ cat /dev/video0 > my.mpg (you need to hit ctrl-c to exit)
+
+
+- /dev/video16
+
+ The decoder output device(s)
+
+ Write-only. Only present if the MPEG decoder (i.e. CX23415) exists.
+
+ An mpeg2 stream sent to this device will appear on the selected video
+ display, audio will appear on the line-out/audio out. It is only
+ available for cards that support video out. Example:
+
+ .. code-block:: none
+
+ cat my.mpg >/dev/video16
+
+
+- /dev/video24
+
+ The raw audio capture device(s).
+
+ Read-only
+
+ The raw audio PCM stereo stream from the currently selected
+ tuner or audio line-in. Reading from this device results in a raw
+ (signed 16 bit Little Endian, 48000 Hz, stereo pcm) capture.
+ This device only captures audio. This should be replaced by an ALSA
+ device in the future.
+ Note that there is no corresponding raw audio output device, this is
+ not supported in the decoder firmware.
+
-Reading from this device gets you the MPEG1/2 program stream.
-Example:
+- /dev/video32
-cat /dev/video0 > my.mpg (you need to hit ctrl-c to exit)
+ The raw video capture device(s)
+ Read-only
-/dev/video16
-The decoder output device(s)
-Write-only. Only present if the MPEG decoder (i.e. CX23415) exists.
+ The raw YUV video output from the current video input. The YUV format
+ is non-standard (V4L2_PIX_FMT_HM12).
-An mpeg2 stream sent to this device will appear on the selected video
-display, audio will appear on the line-out/audio out. It is only
-available for cards that support video out. Example:
+ Note that the YUV and PCM streams are not synchronized, so they are of
+ limited use.
-cat my.mpg >/dev/video16
+- /dev/video48
-/dev/video24
-The raw audio capture device(s).
-Read-only
+ The raw video display device(s)
-The raw audio PCM stereo stream from the currently selected
-tuner or audio line-in. Reading from this device results in a raw
-(signed 16 bit Little Endian, 48000 Hz, stereo pcm) capture.
-This device only captures audio. This should be replaced by an ALSA
-device in the future.
-Note that there is no corresponding raw audio output device, this is
-not supported in the decoder firmware.
+ Write-only. Only present if the MPEG decoder (i.e. CX23415) exists.
+ Writes a YUV stream to the decoder of the card.
-/dev/video32
-The raw video capture device(s)
-Read-only
-The raw YUV video output from the current video input. The YUV format
-is non-standard (V4L2_PIX_FMT_HM12).
+- /dev/radio0
-Note that the YUV and PCM streams are not synchronized, so they are of
-limited use.
+ The radio tuner device(s)
+ Cannot be read or written.
-/dev/video48
-The raw video display device(s)
-Write-only. Only present if the MPEG decoder (i.e. CX23415) exists.
+ Used to enable the radio tuner and tune to a frequency. You cannot
+ read or write audio streams with this device. Once you use this
+ device to tune the radio, use /dev/video24 to read the raw pcm stream
+ or /dev/video0 to get an mpeg2 stream with black video.
-Writes a YUV stream to the decoder of the card.
+- /dev/vbi0
-/dev/radio0
-The radio tuner device(s)
-Cannot be read or written.
+ The 'vertical blank interval' (Teletext, CC, WSS etc) capture device(s)
-Used to enable the radio tuner and tune to a frequency. You cannot
-read or write audio streams with this device. Once you use this
-device to tune the radio, use /dev/video24 to read the raw pcm stream
-or /dev/video0 to get an mpeg2 stream with black video.
+ Read-only
+ Captures the raw (or sliced) video data sent during the Vertical Blank
+ Interval. This data is used to encode teletext, closed captions, VPS,
+ widescreen signalling, electronic program guide information, and other
+ services.
-/dev/vbi0
-The 'vertical blank interval' (Teletext, CC, WSS etc) capture device(s)
-Read-only
-Captures the raw (or sliced) video data sent during the Vertical Blank
-Interval. This data is used to encode teletext, closed captions, VPS,
-widescreen signalling, electronic program guide information, and other
-services.
+- /dev/vbi8
+ Processed vbi feedback device(s)
-/dev/vbi8
-Processed vbi feedback device(s)
-Read-only. Only present if the MPEG decoder (i.e. CX23415) exists.
+ Read-only. Only present if the MPEG decoder (i.e. CX23415) exists.
-The sliced VBI data embedded in an MPEG stream is reproduced on this
-device. So while playing back a recording on /dev/video16, you can
-read the embedded VBI data from /dev/vbi8.
+ The sliced VBI data embedded in an MPEG stream is reproduced on this
+ device. So while playing back a recording on /dev/video16, you can
+ read the embedded VBI data from /dev/vbi8.
-/dev/vbi16
-The vbi 'display' device(s)
-Write-only. Only present if the MPEG decoder (i.e. CX23415) exists.
+- /dev/vbi16
-Can be used to send sliced VBI data to the video-out connector.
+ The vbi 'display' device(s)
----------------------------------
+ Write-only. Only present if the MPEG decoder (i.e. CX23415) exists.
-Hans Verkuil <hverkuil@xs4all.nl>
+ Can be used to send sliced VBI data to the video-out connector.
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff