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• Connecting to RTSP stream via FFMpeg - 'could not find codec parameters for stream 0'

  14 novembre 2013, par user2992545

  I'm a beginner in the FFMpeg world, so please excuse me my overall level of knowledge and any mistakes.

  What I have here is a DVR, made by ITX Security. I have an SDK for it and currently I'm trying to connect to its RTSP using FFMPEG. I've been partially succesfull (i think), the best what I got was :

  `(...)bin>ffplay -user-agent "ITX Security" rtsp://ADMIN:1234@192.168.2.130:5554/live/
  
  
  
  [rtsp @ 02a242e0] UDP timeout, retrying with TCPB sq=0B f=0/0
  
  [rtsp @ 02a242e0] method PAUSE failed: 501 Not Implemented
  
  [rtsp @ 02a242e0] Could not find codec parameters for stream 0 (Video: h264):unspecified size Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  rtsp://ADMIN:1234@192.168.2.130:5554/live/: could not find codec parameters
  
  
  
  nan:  0.000 fd=0 aq=    0KB vq=    0KB sq=    0B f=0/0`

  Is it really indicating that it has trouble in playing the stream (because it lacks a proper codec ?) - or am I just not getting the point ?

  I've captured traffic between my computer and the DVR in question, and something is happening (at least that's what Wireshark says).

  https://www.dropbox.com/s/j65lige244kg8jt/rtsp_ffmpeg.pcap

  What am I doing wrong ?

  Regards.

• How to add a dependency for a package ?

  25 septembre 2021, par Meh.

  I just built and installed FFmpeg (./configure --disable-asm).
  
And I need to use libavformat in my C++ project.

  


  I use FindFFmpeg.cmake, and when I build, I get a bunch of undefined symbol errors so I have to find libraries :

  


      find_package(FFmpeg COMPONENTS avcodec avformat avutil swresample swscale)
    find_library(COREMEDIA_LIBRARY CoreMedia)
    find_library(VIDEOTOOLBOX_LIBRARY VideoToolbox)
    find_library(COREVIDEO_LIBRARY CoreVideo)
    find_library(AUDIOTOOLBOX_LIBRARY AudioToolbox)
    find_library(SECURITY_LIBRARY Security)

## In another file:

  target_link_libraries(videocommon PRIVATE
    FFmpeg::avcodec
    FFmpeg::avformat
    FFmpeg::avutil
    FFmpeg::swscale
    FFmpeg::swresample
    ${COREMEDIA_LIBRARY}
    ${VIDEOTOOLBOX_LIBRARY}
    ${COREVIDEO_LIBRARY}
    ${AUDIOTOOLBOX_LIBRARY}
    ${SECURITY_LIBRARY}
  )



  


  However, I still get errors from libavformat.a(tls_securetransport.o) :

  


    "_SSLRead", referenced from:
      _tls_read in libavformat.a(tls_securetransport.o)
  "_SSLCreateContext", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLSetCertificate", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLSetIOFuncs", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLSetSessionOption", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLSetPeerDomainName", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SecIdentityCreate", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SecTrustEvaluate", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SecTrustSetAnchorCertificates", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLClose", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
      _tls_close in libavformat.a(tls_securetransport.o)
  "_SSLHandshake", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLSetConnection", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)
  "_SSLCopyPeerTrust", referenced from:
      _tls_open in libavformat.a(tls_securetransport.o)


  


  This is the #include part from the file in question tls_securetransport.c :

  


  #include &#xA;&#xA;#include "avformat.h"&#xA;#include "avio_internal.h"&#xA;#include "internal.h"&#xA;#include "network.h"&#xA;#include "os_support.h"&#xA;#include "url.h"&#xA;#include "tls.h"&#xA;#include "libavcodec/internal.h"&#xA;#include "libavutil/avstring.h"&#xA;#include "libavutil/opt.h"&#xA;#include "libavutil/parseutils.h"&#xA;&#xA;#include <security></security>Security.h>&#xA;#include <security></security>SecureTransport.h>&#xA;#include <corefoundation></corefoundation>CoreFoundation.h>&#xA;

  


  Why is this happening ?

  


  I also get the same result if I were to build with OpenSSL or LibreSSL. What is causing the problem ? My project or incorrectly building FFmpeg ?

  


  If I were to use LibreSSL :

  


  #cmakelists.txt:
find_package(LibreSSL)

#linker
  target_link_libraries(videocommon PRIVATE
    FFmpeg::avcodec
    FFmpeg::avformat
    FFmpeg::avutil
    FFmpeg::swscale
    FFmpeg::swresample
    ${LIBRESSL_LIBRARIES} 
    ${COREMEDIA_LIBRARY}
    ${VIDEOTOOLBOX_LIBRARY}
    ${COREVIDEO_LIBRARY}
    ${AUDIOTOOLBOX_LIBRARY}
  )

#full error
Undefined symbols for architecture x86_64:
  "_tls_config_error", referenced from:
      _ff_tls_open in libavformat.a(tls_libtls.o)
  "_tls_config_insecure_noverifytime", referenced from:
      _ff_tls_open in libavformat.a(tls_libtls.o)
  "_tls_accept_cbs", referenced from:
      _ff_tls_open in libavformat.a(tls_libtls.o)
  "_tls_connect_cbs", referenced from:
      _ff_tls_open in libavformat.a(tls_libtls.o)


  


• Evolution #4256 : Faire un signalement des mise à jour de sécu

  11 janvier 2019

  Si on pouvait éviter de coder un truc spécifique encore, ça serait bien :)

  Mais sinon, composer.json n’a aucun numéro de version pour le paquet lui-même (à part pour la déclaration des dépendances). C’est le gestionnaire de version qui les gère (les tags en Git par exemple). https://github.com/drush-ops/drush/issues/2947 indique chez Drush https://github.com/drush-ops/drush/pull/3087 qui se base sur un fichier .json de déclaration (pour vérifier des paquets composer). En l’occurrence https://raw.githubusercontent.com/drupal-composer/drupal-security-advisories/8.x/composer.json