[Linux] in Linux, the MIPs platform cross-compiles the FFMPEG library and uses the library to capture a frame in the video.

I. Cross-compile FFMPEG library on the MIPs platform in Linux:

1. Download the source code of the FFMPEG Library
(Http://sourceforge.net/project/showfiles.php? Group_id = 205275 & package_id = 248632 ):
[Root @ localhost FFMPEG] # ls
Ffmpeg-laster.tar.gz
2. decompress:
[Root @ localhost FFMPEG] # tar zxvf ffmpeg-laster.tar.gz
3. Start configuration and compile:
[Root @ localhost FFMPEG] # mkdir FFMPEG-release
[Root @ localhost FFMPEG] # cd FFMPEG
[Root @ localhost FFMPEG] #. /configure -- enable-Cross-compile -- target-OS = Linux -- Cross-Prefix = mipsel-Linux--- cc = mipsel-Linux-GCC -- enable-shared -- arch = MIPS -- prefix =/opt/brcm/FFMPEG-release
[Root @ localhost FFMPEG] # Make
[Root @ localhost FFMPEG] # make install
[Root @ localhost FFMPEG] # CD ../FFMPEG-release
[Root @ localhost FFMPEG-release] # tar-zcvf ff1__lib.tar.gz./lib

Run on the Board:
# Cp ffjpeg_lib.tar.gz/usr/local/lib/
# Cd/usr/local/lib/
# Tar-zxvf ffjpeg_lib.tar.gz-C ../
# Rm ffjpeg_lib.tar.gz

# Cp FFMPEG-release/bin/*/bin/
# FFMPEG
FFmpeg version SVN-r21694, copyright (c) 2000-2010 Fabrice bellard, et al.
Built on Nov 17 2012 02:25:17 with GCC 4.5.3
Configuration: -- enable-Cross-compile -- target-OS = Linux -- Cross-Prefix = mipsel-Linux--- cc = mipsel-Linux-GCC -- enable-shared -- arch = MIPS -- prefix = /opt/brcm/FFMPEG-release
Libavutil 50. 9. 0/50. 9. 0
Libavcodec 52.52. 0/52.52. 0
Libavformat 52.51. 0/52.51. 0
Libavdevice 52. 2. 0/52. 2. 0
Libswscale 0.10. 0/0.10. 0
Hyper fast Audio and Video Encoder
Usage: FFMPEG [Options] [[infile options]-I infile]... {[OUTFILE options] OUTFILE }...

Use-h to get full help or, even better, run 'man FFMPEG'
#

So far, we have successfully transplanted FFMPEG to our development board.

 

Ii. Use the FFMPEG library in Linux:

1. Use the following command line:
FFmpeg-I test.mp4-y-F image2-SS 30-S 95*95-vframes 1 a.jpg
Find an MP4 File: test.mp4, and then use the above command to obtain the image of the video for 30 seconds, save
95*95 pixels JPG file.

FFmpeg-I ipv94.mp4-vframes 30-pix_fmt rgb24-y-F GIF a.gif
Convert the first 30 frames into GIF files.

2. Call the function in the program to capture video images:
First, add warehouse receiving support. In the MAKEFILE file of our executable program, add:
Cflags + =-I/opt/brcm/FFMPEG-release/include/
Lflags + =-L/opt/brcm/FFMPEG-release/lib/-lavutil-lavformat-lavcodec-lswscale
(Remember, the last four parameters are indispensable; otherwise, compilation fails)
Then a mature demo is attached to the FFMPEG library method in programming.
(Test_snap.c and makefile)

With several websites I have read:

Http://ray.imiddle.net/2008/10/ffmpeg-install-and-usage/

Http://blog.csdn.net/menuconfig/article/details/2600890

Http://bbs.chinaunix.net/thread-1932536-1-1.html