dm365 encode 程序代码

NAME encode - encode video and/or speech files SYNOPSIS encode [options...] DESCRIPTION This demo uses the Codec Engine to encode data from peripheral device drivers to files. Video and speech files are supported. The files created will be encoded elementary streams of video or speech. You must supply at least one file for the demo to run. The DM350MM and CMEM kernel modules need to be inserted for this demo to run. Use the script 'loadmodules_hd.sh' to make sure both kernel modules are loaded with adequate parameters. OPTIONS -v <video file>, --videofile <video file> Encodes video data to the given file. The file will be created if it doesn't exist, and truncated if it does exist. The demo detects which type of video file is supplied using the file extension. Supported video algorithm is MPEG4 SP, H.264 MP (.mpeg4 or .m4v extension, .264). -s <speech file>, --speechfile <speech file> Encodes speech data to the given file. The file will be created if it doesn't exist, and truncated if it does exist. The demo detects which type of speech file is supplied using the file extension. The only supported speech algorithm as of now is G.711 (.g711 extension). -y <1-3>, --display_standard <1-3> Sets the resolution of the display. If the captured resolution is larger than the display it will be center clamped, and if it is smaller the image will be centered. 1 D1 @ 30 fps (NTSC) [Default] 2 D1 @ 25 fps (PAL) 3 720P @ 60 fps -r <resolution>, --resolution <resolution> The resolution of video to encode in the format 'width'x'height'. Default is the size of the video standard (720x480 for NTSC, 720x576 for PAL, 1280x720 for 720P). -b <bit rate>, --videobitrate <bit rate> This option sets the bit rate with which the video will be encoded. Use a negative value for variable bit rate. Default is variable bit rate. -x, --svideo Use s-video video input instead of the composite default. -l, --linein This option makes the input device for sound recording be the 'line in' as opposed to the 'mic in' default. -k, --keyboard Enables the keyboard input mode which lets the user input commands using the keyboard in addition to the IR remote control interface. At the prompt type 'help' for a list of available commands. -t <seconds>, --time <seconds> The number of seconds to run the demo. Defaults to infinite time. -o, --osd Enables the On Screen Display for data visualization. If this option is not passed, the data will be output to stdout instead. -h, --help This will print the usage of the demo. EXAMPLE USAGE First execute this script to load kernel modules required: ./loadmodules_hd.sh General usage: ./encode -h H264 HP video encode only @720p resolution with OSD: ./encode -v test.264 -y 3 -o H264 HP video encode from s-video and G.711 speech encode: ./encode -v test.264 -s test.g711 -x MPEG4 SP video encode only in CIF NTSC resolution with OSD: ./encode -v test.mpeg4 -r 352x240 -o MPEG4 SP video encode at 1Mbps with keyboard interface on D1 PAL display: ./encode -v test.mpeg4 -b 1000000 -k -y 2 COPYRIGHT Copyright (c) Texas Instruments Inc 2009 Use of this software is controlled by the terms and conditions found in the license agreement under which this software has been supplied or provided. KNOWN ISSUES VERSION 2.0 CHANGELOG 1.2, 1.3: In order to support multiple display resolutions on this platform the '-y' flag was added. Showing the OSD is now selectable using the '-o' switch. If this option is not set the data will be written to stdout. 1.1: Support for removing some of the interlacing artifacts before encoding the buffer using the resizer peripheral was added (on by default, use the -d option to disable). In order to parallelize the resizer processing with the DSP processing the video thread was divided into a capture thread and a video processing thread. The display thread now uses the VPSS resizer peripheral to fill the display frame buffers. This change reduces the ARM CPU load significantly as memcpy() is no longer used. 1.0: A 'display' thread has been added to show the raw captured video being currently encoded on the display while it is being encoded. This requires an extra memory copy on the ARM which increases the ARM CPU load slightly. A 'writer' thread has been added to parallelize the filesystem I/O with the DSP algorithm processing. The demo now supports encoding arbitrary resolutions using the '-r' switch. A bit rate parameter was added (-b) to allow the user to change bit rate of the video being encoded. The demo now has a keyboard interface (-k) which lets you input the same commands as you would have input using the remote control in the past. Added support for s-video video input using the '-x' flag. SEE ALSO For documentation and release notes on the individual components see the html files in the host installation directory.