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• FFmpeg text at random position [duplicate]

  12 November 2020, by user2534965

  I need to print text at random position (to protect videos).

  



  The following works, but it seems that the random position is updated at miliseconds what makes the text go crazy across the screen. Someone has any idea? Thanks

  



  ffmpeg -i video.mov -vf "drawtext=fontfile=/Windows/Fonts/arial.ttf: text='Test Text':x=random(1)*w: y=random(1) * h" -acodec copy output.avi


  


• avcodec: fix aac/ac3 parser bitstream buffer size

  22 August 2014, by Michael Niedermayer

  avcodec: fix aac/ac3 parser bitstream buffer size
  Buffers containing copies of the AAC and AC3 header bits were not padded
  
  before parsing, violating init_get_bits() buffer padding requirement,
  
  leading to potential buffer read overflows.
  
  This change adds FF_INPUT_BUFFER_PADDING_SIZE bytes to the bit buffer
  
  for parsing the header in each of aac_parser.c and ac3_parser.c.
  Based on patch by: Matt Wolenetz <wolenetz@chromium.org>
  
  Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/aac_parser.c
  • [DH] libavcodec/ac3_parser.c

• When adding a new module to nginx, an error occurred in the configuration assembly

  16 October 2019, by Ambasador

  On Centos 6, I am rebuilding nginx to add the module "nginx-rtmp-module-master"

  ./configure --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx
  
  --conf-path=/etc/nginx/nginx.conf
  
  --error-log-path=/var/log/nginx/error.log
  
  --http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx.pid
  
  --lock-path=/var/run/nginx.lock
  
  --http-client-body-temp-path=/var/cache/nginx/client_temp
  
  --http-proxy-temp-path=/var/cache/nginx/proxy_temp
  
  --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp
  
  --http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp
  
  --http-scgi-temp-path=/var/cache/nginx/scgi_temp --user=nginx
  
  --group=nginx
  
  --with-openssl=/builddir/build/BUILD/bx-nginx-1.16.1/openssl-1.1.1c
  
  --with-openssl-opt=enable-tls1_3 --with-http_ssl_module
  
  --with-http_realip_module --with-http_addition_module
  
  --with-http_sub_module --with-http_dav_module --with-http_flv_module
  
  --with-http_mp4_module --with-http_gunzip_module
  
  --with-http_gzip_static_module --with-http_random_index_module
  
  --with-http_secure_link_module --with-http_stub_status_module
  
  --with-http_auth_request_module --with-http_v2_module --with-mail
  
  --with-mail_ssl_module --with-file-aio --with-ipv6
  
  --add-module=../nginx-rtmp-module-master

  After the configuration is completed in the console, the following:

  ....
  
  configuring additional modules
  
  adding module in ../nginx-rtmp-module-master
  
  + ngx_rtmp_module was configured
  
  checking for PCRE library ... found
  
  checking for PCRE JIT support ... not found
  
  checking for zlib library ... found
  
  creating objs/Makefile
  
  
  
  Configuration summary
  
  + using system PCRE library
  
  + using OpenSSL library:
  
  /builddir/build/BUILD/bx-nginx-1.16.1/openssl-1.1.1c
  
  + using system zlib library
  
  
  
  nginx path prefix: "/etc/nginx"
  
  nginx binary file: "/usr/sbin/nginx"
  
  nginx modules path: "/etc/nginx/modules"
  
  nginx configuration prefix: "/etc/nginx"
  
  nginx configuration file: "/etc/nginx/nginx.conf"
  
  nginx pid file: "/var/run/nginx.pid"
  
  nginx error log file: "/var/log/nginx/error.log"
  
  nginx http access log file: "/var/log/nginx/access.log"
  
  nginx http client request body temporary files:
  
  "/var/cache/nginx/client_temp"
  
  nginx http proxy temporary files: "/var/cache/nginx/proxy_temp"
  
  nginx http fastcgi temporary files: "/var/cache/nginx/fastcgi_temp"
  
  nginx http uwsgi temporary files: "/var/cache/nginx/uwsgi_temp"
  
  nginx http scgi temporary files: "/var/cache/nginx/scgi_temp"
  
  
  
  ./configure: warning: the "--with-ipv6" option is deprecated

  After trying to build using the make command, I get an error:

  [root@216501 nginx-1.16.1]# make
  
  make -f objs/Makefile
  
  make[1]: Entering directory `/root/nginx-1.16.1'
  
  cd /builddir/build/BUILD/bx-nginx-1.16.1/openssl-1.1.1c \
  
  && if [ -f Makefile ]; then make clean; fi \
  
  && ./config
  
  --prefix=/builddir/build/BUILD/bx-nginx-1.16.1/openssl-1.1.1c/.openssl
  
  no-shared no-threads enable-tls1_3 \
  
  && make \
  
  && make install_sw LIBDIR=lib
  
  /bin/sh: line 0: cd:
  
  /builddir/build/BUILD/bx-nginx-1.16.1/openssl-1.1.1c: No such file or
  
  directory
  
  make[1]: ***
  
  [/builddir/build/BUILD/bx-nginx-1.16.1/openssl-1.1.1c/.openssl/include/openssl/ssl.h]
  
  Error 1
  
  make[1]: Leaving directory `/root/nginx-1.16.1'
  
  make: *** [build] Error 2

  How to fix the error to correctly install the module I need ?