Proof of Concept TV-IN and hardware accelerated H264-JPEG encoder for sunxi. Example app for TV-IN, captures N frames from /dev/video1 (tvin cvbs), send output to hdmi or parallel LCD, compress it to jpeg images /tmp/testImageXXX.jpg and/or h264 saving the raw h264 stream to /tmp/tvin.h264 and mux it to mkv container /tmp/tvin.mkv. This is a basic example for using the tvin, H264-JPEG hardware encoder for sunxi SoCs. This example includes:
- Using analogue input TV decoder (CVBS).
- Compress tvin to jpeg using sw libjpegturbo.
- Hw scaling. Scale input PAL 720x576 to VGA or QVGA.
- Simultaneous HW encoding jpeg and h264 with some kind of time slicing. It is just a proof of concept and not recommended for production use!
Edit: Based on PoC sunxi-tvin by Enrico Butera: https://github.com/ebutera/sunxi-tvin Based on PoC jpeg encoder by Manuel Braga: https://gitorious.org/recedro/jepoc But gitorious has been closed down and therefore the link "https://gitorious.org/recedro/jepoc" is no longer working. Based on PoC h264 encoder by Jens Kuske: https://github.com/jemk/cedrus
Modified by Milos Ladicorbic [email protected] I merged this three PoC software and tested it on Allwinner A20 (awsomA20 - https://aw-som.com/product_info.php?products_id=32).
Licence: Because appl also uses libjpegturbo read libjpegturbo licence: LICENSE.md or https://github.com/libjpeg-turbo/libjpeg-turbo/blob/master/LICENSE.md This software is based in part on the work of the Independent JPEG Group.
Limitations:
- no B frames
- constant QP
- only raw nv12 or nv16 input and bytestream output
- ... many more
Usage: "Options:\n" "-h | --help Print this message\n" "-c | --count Number of frames to grab\n" "-C | --compress Number of frames to compress\n" "-d | --device name Video device name [%s]\n" "-o | --outputMarks Print outputs marks\n" "-q | --quality Jpeg enc quality\n" "-r | --raw Number of raw frames to save\n" "-p | --preview Preview frames to display\n" "-f | --reafFile Get frame from file\n" " --yuvToRgb Convert yuv4:2:2 -> rgb -> jpeg\n" " --jpegEnc Select software or hardware jpeg encoder (Default: 1)\n" " | 0 -> disable |\n" " | 1 -> SW |\n" " | 2 -> HW |\n" " --scale Scale source image to (Default: none):\n" " NOTE: it must be uset with HW encoder.\n" " | 0 -> none |\n" " | 1 -> ARBITRARY-SCALER-VGA |\n" " | 2 -> ARBITRARY-SCALER_QVGA |\n" " --h264Enc Enable h264Encoder (Default: Disabled)\n"
Examples:
-
Take 100 frames from tvd and show it on display: $ ./sunxi-tvin2jpeg --p -c 100
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Take 100 frames, show it on display and compress first 10 frames to jpeg by SW encoder and libjpegturbo: $ ./sunxi-tvin2jpeg --p -c 100 -C 10 -q 85
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Take 10 times frame from file, convert it from yuv_4:2:2_nv12_UVUV to RGB and compress it to jpeg: $ ./sunxi-tvin2jpeg --p -c 10 -C 10 -q 85 --readFile /tmp/frame_000_yuy2_720x576.raw --yuvToRgb
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Take 200 frames from tvin, scale frame with hw veisp from PAL 720x576 to QVGA 320x240, compress it to jpeg with hw encoder, compress it to h264. $ time ./sunxi-tvin2jpeg --p -c 200 -C 200 -q 85 --jpegEnc 2 --scale 2 --h264enc --o Play it with vlc, ffplay etc...