구차니의 잡동사니 모음

libavcodec/avcodec.h

- AVCodecContext

- AVCodec

- AVPacket

libavformat/avformat.h

- AVFormatContext

libswscale/swscale_internal.h ??

- SwsContext 

libavutil/frame.h

from libavcodec/avcodec.h

- AVFrame

libavutil/dict.h

- AVDictionary 

av_register_all() // Initialize libavformat and register all the muxers, demuxers and protocols.

avformat_open_input()

avformat_find_stream_info()

av_dump_format()

avcodec_find_decoder()

avcodec_open2()

av_frame_alloc()

avpicture_get_size()

av_malloc()

sws_getContext()

avpicture_fill()

while(av_read_frame())

avcodec_decode_video2()

sws_scale()

av_free_packet()

av_free()

avcodec_close()

avformat_close_input() 

AVFormatContext *pFormatCtx = NULL;

AVCodecContext  *pCodecCtx = NULL;

AVCodec         *pCodec = NULL;

AVFrame         *pFrame = NULL; 

AVFrame         *pFrameRGB = NULL;

AVPacket        packet;

AVDictionary    *optionsDict = NULL;

struct SwsContext      *sws_ctx = NULL;

av_register_all();

avformat_open_input(&pFormatCtx, argv[1], NULL, NULL);

avformat_find_stream_info(pFormatCtx, NULL);

av_dump_format(pFormatCtx, 0, argv[1], 0);

pCodecCtx=pFormatCtx->streams[videoStream]->codec;

pCodec=avcodec_find_decoder(pCodecCtx->codec_id);

avcodec_open2(pCodecCtx, pCodec, &optionsDict)

pFrame=av_frame_alloc();

pFrameRGB=av_frame_alloc();

numBytes=avpicture_get_size(PIX_FMT_RGB24, pCodecCtx->width,

pCodecCtx->height);

buffer=(uint8_t *)av_malloc(numBytes*sizeof(uint8_t));

sws_ctx = sws_getContext(

    pCodecCtx->width,

    pCodecCtx->height,

    pCodecCtx->pix_fmt,

    pCodecCtx->width,

    pCodecCtx->height,

    PIX_FMT_RGB24,

    SWS_BILINEAR,

    NULL,

    NULL,

    NULL    );

avpicture_fill((AVPicture *)pFrameRGB, buffer, PIX_FMT_RGB24,

pCodecCtx->width, pCodecCtx->height);

while(av_read_frame(pFormatCtx, &packet)>=0)

{

avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished,  &packet);

av_free_packet(&packet);

}

av_free(buffer);

av_free(pFrameRGB);

av_free(pFrame);

avcodec_close(pCodecCtx);

avformat_close_input(&pFormatCtx); 

ffplay -max_delay 500000 -rtsp_transport udp -v trace "rtsp://user:pass@CamIP:Port/URL" 

-max_delay         <int>   ED... maximum muxing or demuxing delay in microseconds 

When receiving data over UDP, the demuxer tries to reorder received packets (since they may arrive out of order, or packets may get lost totally). This can be disabled by setting the maximum demuxing delay to zero (via the max_delay field of AVFormatContext). 

av_dict_set(&options, "buffer_size", "655360", 0); 

int av_dict_set (AVDictionary ** pm, const char * key, const char * value, int flags ) 

int AVCodecContext::rc_buffer_size

decoder bitstream buffer size

encoding: Set by user.

decoding: unused

Definition at line 2291 of file avcodec.h. 

Also setting -probesize and -analyzeduration to low values may help your stream start up more quickly (it uses these to scan for "streams" in certain muxers, like ts, where some can appears "later", and also to estimate the duration, which, for live streams, the latter you don't need anyway). This should be unneeded by dshow input. 

$ vi /etc/fail2ban/jail.conf

banaction = iptables-multiport

$ vi /etc/fail2ban/action.d/iptables-multiport.conf

actionban = iptables -I fail2ban-<name> 1 -s <ip>/24 -j <blocktype>

actionunban = iptables -D fail2ban-<name> -s <ip>/24 -j <blocktype>

$ man iptables

       [!] -s, --source address[/mask][,...]

              Source  specification.  Address  can  be either a network name, a hostname, a network IP address (with /mask), or a plain IP address. Hostnames will be

              resolved once only, before the rule is submitted to the kernel.  Please note that specifying any name to be resolved with a remote query such as DNS is

              a  really bad idea.  The mask can be either an ipv4 network mask (for iptables) or a plain number, specifying the number of 1's at the left side of the

              network mask.  Thus, an iptables mask of 24 is equivalent to 255.255.255.0.  A "!" argument before the address specification inverts the sense  of  the

              address.  The  flag  --src  is an alias for this option.  Multiple addresses can be specified, but this will expand to multiple rules (when adding with

              -A), or will cause multiple rules to be deleted (with -D).

$ fail2ban-client 

    set <JAIL> banip <IP>                    manually Ban <IP> for <JAIL>

    set <JAIL> unbanip <IP>                  manually Unban <IP> in <JAIL>

$ sudo fail2ban-client set ssh banip 221.194.44.252

$ sudo fail2ban-client set ssh banip 221.194.44.252/24 

$ sudo iptables -L

Chain fail2ban-ssh (1 references)

target     prot opt source               destination

REJECT     all  --  221.194.44.0/24      anywhere             reject-with icmp-port-unreachable

REJECT     all  --  221.194.44.252       anywhere             reject-with icmp-port-unreachable

RETURN     all  --  anywhere             anywhere 

$ sudo webalizer -c /etc/webalizer/webalizer.conf.old