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The SDK includes Linux and Windows device drivers, sample application programs, and an application programming interface (API) that is supplied as a both a Windows dynamic link library (DLL) and a Linux static library. The API core is available in source code form to OEMs who need to port the API to other operating systems. Watch the video. Model 2253 is a compact and robust USB-compatible audio/video codec that is powered from a single USB port. Its small size (1.5' x 2.75') and low power consumption (1.5 Watts) make it ideal for both portable and embedded applications.
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- Go to the Sensoray web site at www.sensoray.com - Browse to the Products/Video - Image Capture/Frame Grabbers page - Locate and select the USB Model 2250 USB MPEG Frame Grabber link - On the 2250 Product page, select the Software and Manuals tab - At the bottom of the page, select and download the 'Model 2250/2251 Windows SDK'.
Nothing fancy here, just download the drivers from: http://www.sensoray.com/products/2253.htm, run 'sudo apt-get install libmagickwand-dev', then run a 'make' and 'sudo make install'.
See http://www.sensoray.com/products/2250.htm to download the linux SDK. The installation instructions that they give in the documentation is outdated. Instead, untar/unzip the SDK, cd into the directory. Make sure that the device is NOT plugged in! Then:
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We need to edit the Makefile since apparently the Linux driver staging area has changed:
-find /lib/modules/$(shell uname -r)/kernel/drivers/staging/go7007/
should be changed to
-find /lib/modules/$(shell uname -r)/kernel/drivers/staging/media/go7007/
and then
- Simultaneous encode/decode/preview in a robust, compact unit
- Low preview latency
- H.264 HP@L3, MPEG-4 ASP, MJPEG video compression
- AAC, G.711 audio compression, uncompressed PCM
- Unicode text and graphic overlay
- Closed caption/VBI support for H.264 streams
- MP4 files can be edited in Adobe Premiere with A/V sync preserved
- Transport Stream
- Small Form Factor
Description
Model 2253 is a compact and robust USB-compatible audio/video codec that is powered from a single USB port. Its small size (1.5' x 2.75') and low power consumption (1.5 Watts) make it ideal for both portable and embedded applications.
Simplified 2253 block diagram
Multiple, independent video processors allow the unit to simultaneously produce two different video streams from its single composite input and send the streams out over USB. One of the streams can be a low-latency uncompressed stream (useful for real time previewing) and the other compressed, or both streams may be compressed. Image transformations (resolution, rotation, mirroring) are independently configurable for each stream, as well as compression type and bit rate in the case of compressed streams.
Pause and resume are supported for both stream capture and playback. Up to 1024 bytes of application-supplied data can be inserted in the H.264 or MPEG stream at regular frame intervals or single shot, and closed captions are supported for H.264 streams.
Stream Formats
Video and audio are available as elementary streams or may be multiplexed in MP4 container format.
The 2253 supports transport streams by packaging elementary streams with error correction and stream synchronization to help maintain integrity when the signal is degraded. The transport stream uses AAC audio and H.264 for MPEG-4.
Digital I/O
One general purpose digital input and one output are provided. The output is optically isolated, while the input may be either optically isolated or galvanically coupled. The input is sampled every millisecond and, when a state change is detected, a notification is sent to the application program. The input can also be used to control the flow of any stream, without host involvement.
Audio Sync
Hardware-generated timestamps are employed to keep audio synchronized to the video, thus eliminating 'lip sync' problems. MP4 files can be edited in Adobe Premiere Pro with A/V sync preserved.
Real-Time Text Overlay
The overlay generators can position up to 160 characters of text anywhere in the video frame. A unique text string, consisting of mixed constant and variable text, may be defined for each overlay generator. Text variables are automatically updated every video frame. Supported variables include time, date, and frame count.
Graphics Overlay with Unicode Text
Overlay images and high quality, styled unicode text (bold, italic, underline, outline and shadow) can be displayed on top of the composite video output, compressed streams, or preview stream (but not low latency preview stream).
Up to 256 full-color overlay regions are supported on the composite output, and up to eight monochrome-only regions are supported on compressed and preview streams (except low latency preview). BMP and PNG image formats are supported, with 24 or 32 bits per pixel and up to eight transparancy levels.
Example overlay captured from composite output | Example overlay captured from compressed stream |
Please note that preview/compressed stream overlays (text or graphics) modify luminance only and consequently may be tinted by background colors. Also, unlike composite output overlays, these overlays are limited in number, size and complexity; see the above right image for an example what is possible.
Video Decoder
The 2253 can also perform as a decoder, converting a USB-supplied compressed audio/video stream into standard analog video and audio signals. (Note: Decoding is guaranteed only for streams captured with the 2253). The following formats are supported for decoding: MPEG-4, H.264, MP4 and MJPEG. The composite output video can be sourced from either the composite video input or a decoded compressed stream.
Low Latency Preview
Model 2253 supports a low latency preview mode for real-time applications. When capturing in native resolution (704x480 for NTSC or 704x576 for PAL) this mode reduces the overall latency by approximately one frame time. See the latency timing diagram for details.
Cables
A USB cable is supplied with model 2253. Video cables must be purchased separately.
Packaging Options
Model 2253 is a small footprint, bare-board version for OEM applications.
It is CE compliant when used in an appropriate enclosure.
Model 2253S features a sturdy metal enclosure with video, audio, USB and GPIO connectors.
Model 2253P combines a 2253, a GPS receiver, and incremental encoder interfaces in a robust metal enclosure.
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Easy Integration
The 2253 bare board is ideal for embedding with computers on modules (COMs) such as the Toradex Apalis. Watch this short video to see how easy it is to integrate the 2253 with a compact CPU:
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Model 2253 with Toradex Apalis.
Specifications
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| Video | |
|---|---|
| Input | 1 NTSC/PAL composite, 75 Ohm |
| Output | 1 NTSC/PAL composite, 75 Ohm |
| Preview format | 640x480@ 30 fps (NTSC); 720x576@25 fps (PAL); YUV4:2:2, GREY8, JPEG, RGB |
| Preview latency | See timing diagrams below |
| Audio | |
| Inputs | 1 line stereo + 1 microphone mono Software selectable (only one may be active) |
| Output | 1 line stereo |
| Overlay | |
| Text Overlay | Up to 160 characters for full resolution images |
| Video Output Overlay | Up to 256 regions of BMP and PNG (with 24 or 32 bits/pixel), or unicode text. 16-bit color, 3-bit alpha channel |
| Video Capture Overlay | Up to 8 monochrome regions of BMP and PNG (with 24 or 32 bits/pixel), or unicode text |
| Streams | |
| Image transformation | 2 independent image transformers: Resize to various resolutions Rotate 90°/180°/270° Mirror horizontally or vertically |
| Encoding format | Video: H.264 HP@L3, MPEG-4 ASP, JPEG; Audio: G.711, AAC |
| Output stream format | Elementary audio/video, MPEG-4 program stream (.MP4), MJPEG AVI, Transport Stream |
| System | |
| Interface | USB 2.0 High-speed |
| Digital I/Os | 1 input, galvanically coupled or optically isolated 1 output, optically isolated |
| Power consumption | <1.5 W (300 mA @ 5 V) from USB port |
| Operating temperature | Standard version: 0 to 70 °C Extended version: -40 to +85 °C |
| Dimensions | 2253: 2.755' x 1.5' 2253S: 5.14' x 3.28' x 1.14' |
Preview Latency Timing
Documentation
| File | Version | Type | Size |
|---|---|---|---|
| Manuals | |||
| 2253 Hardware Manual | 1.2.1 | 530 KB | |
| 2253 Linux Software Manual | 1.2.8 | 396 KB | |
| 2253 Windows Software Manual | 1.2.37 | 939 KB | |
| Mechanical Drawings | |||
| Mechanical drawing, 2253 | 1.0.0 | 22 KB | |
| Mechanical drawing, 2253 mounted on 2253TA | 1.0.0 | 97 KB | |
| Mechanical drawing, 2253S | 1.0.0 | 518 KB | |
| Other | |||
| Model 2253 tech support wiki FAQs, examples and additional information | — | HTML | — |
| CE Compliance Report, 2253 | — | 2.04 MB | |
Downloads
| File | Version | Type | Size |
|---|---|---|---|
| 2253 Linux Software Development Kit | 1.2.15 | BZ2 | 5.35 MB |
| 2253 Windows Software Development Kit Compatible with Windows 7, Windows 8, Windows 10, Windows XP, and Windows Vista | 1.2.38 | ZIP | 30.56 MB |
| Other Operating Systems | |||
| Need a software development kit for another operating system? We can port our SDK to your OS for a NRE fee or, with a volume commitment, at no additional cost. Contact Sales for details. | |||