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Submit bugs and patches
13 avril 2011Unfortunately a software is never perfect.
If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
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Le profil des utilisateurs
12 avril 2011, parChaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...) -
Configurer la prise en compte des langues
15 novembre 2010, parAccéder à la configuration et ajouter des langues prises en compte
Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...)
Sur d’autres sites (5992)
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Blank out video frames for last two minutes of MP4 (while keeping audio intact)
13 juillet 2020, par fourells5I am trying to make a copy of one of my mp4 movies with audio intact, but blacking out video frames only on the last few minutes. Basically I want to keep the end credit music but without the artifacted video.


I found this answer : which works perfectly for an entire mp4 file (including a test fragment I made of the above ending credits sequence), but I need it applied as I stated above to just the end of the entire copied full mp4.


In this case I don't want to start blanking the video stream frames until after 2h 7m 30s. I messed around with combinations of the -ss, -start_time and -timecode 02:07:31 params, but I'm an ffmpeg noob and couldn't get it to produce anything but cut-out sections or the whole copy blanked.


Any guidance would be greatly appreciated !


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Compiling c++ program for ffmpeg, error give undefined reference to [duplicate]
6 août 2020, par leonardltk1I have a code
read_mp3.cpp, which usesffmpegto decode an mp3 file into an array.

Code for
read_mp3.cppis as follows :

#include 
 #include 

 // I use extern "C" as recommended here: https://blog.csdn.net/qq_18144521/article/details/79608355
 extern "C"
 {
 #include <libavutil></libavutil>opt.h>
 #include <libavcodec></libavcodec>avcodec.h>
 #include <libavformat></libavformat>avformat.h>
 #include <libswresample></libswresample>swresample.h>
 }
 using namespace std;


 int decode_audio_file(const char* path, const int sample_rate, double** data, int* size) {
 // initialize all muxers, demuxers and protocols for libavformat
 // (does nothing if called twice during the course of one program execution)
 av_register_all();

 /*
 Code for the rest of this function is found here :
 https://rodic.fr/blog/libavcodec-tutorial-decode-audio-file/
 */

 return 0;
 }

 int main (int argc, char ** argv) {
 // decode data
 int sample_rate = 44100;
 double* data;
 int size;
 if (decode_audio_file(argv[1], sample_rate, &data, &size) != 0) {
 return -1;
 }

 /*
 Do something with data ...
 */

 return 0;
 }


I tried different ways to compilations, but to no avail :


g++ -o ./read_mp3.out -Ofast -Wall -Wextra \
 -lavformat-ffmpeg -lavdevice-ffmpeg -lavcodec-ffmpeg -lavutil -lswresample \
 -std=c++11 "./read_mp3.cpp"
 
 g++ -o ./read_mp3.out -Ofast -Wall -Wextra \
 -lavformat -lavdevice -lavcodec -lavutil -lswresample \
 -std=c++11 "./read_mp3.cpp"
 
 g++ -o ./read_mp3.out -Ofast -Wall -Wextra \
 -lavformat -lavdevice -lavcodec -lavutil -pthread -ldl -lswscale -lbz2 -lz -lm \
 -std=c++11 "./read_mp3.cpp"


but i get the following error :


/tmp/ccnZzoIh.o: In function `decode_audio_file(char const*, int, double**, int*)':
 read_mp3.cpp:(.text+0x2781): undefined reference to `av_register_all'
 read_mp3.cpp:(.text+0x2786): undefined reference to `avformat_alloc_context'
 read_mp3.cpp:(.text+0x279c): undefined reference to `avformat_open_input'
 read_mp3.cpp:(.text+0x27b7): undefined reference to `avformat_find_stream_info'
 read_mp3.cpp:(.text+0x284b): undefined reference to `avcodec_find_decoder'
 read_mp3.cpp:(.text+0x2858): undefined reference to `avcodec_open2'
 read_mp3.cpp:(.text+0x2865): undefined reference to `swr_alloc'
 read_mp3.cpp:(.text+0x2880): undefined reference to `av_opt_set_int'
 read_mp3.cpp:(.text+0x2896): undefined reference to `av_opt_set_int'
 read_mp3.cpp:(.text+0x28ae): undefined reference to `av_opt_set_int'
 read_mp3.cpp:(.text+0x28c4): undefined reference to `av_opt_set_int'
 read_mp3.cpp:(.text+0x28dc): undefined reference to `av_opt_set_int'
 
 /tmp/ccnZzoIh.o:read_mp3.cpp:(.text+0x28f0): more undefined references to `av_opt_set_int' follow
 /tmp/ccnZzoIh.o: In function `decode_audio_file(char const*, int, double**, int*)':
 read_mp3.cpp:(.text+0x2907): undefined reference to `av_opt_set_sample_fmt'
 read_mp3.cpp:(.text+0x291d): undefined reference to `av_opt_set_sample_fmt'
 read_mp3.cpp:(.text+0x2927): undefined reference to `swr_init'
 read_mp3.cpp:(.text+0x2931): undefined reference to `swr_is_initialized'
 read_mp3.cpp:(.text+0x2943): undefined reference to `av_init_packet'
 read_mp3.cpp:(.text+0x2948): undefined reference to `av_frame_alloc'
 read_mp3.cpp:(.text+0x297b): undefined reference to `av_read_frame'
 read_mp3.cpp:(.text+0x299a): undefined reference to `avcodec_decode_audio4'
 read_mp3.cpp:(.text+0x29cc): undefined reference to `av_samples_alloc'
 read_mp3.cpp:(.text+0x29e6): undefined reference to `swr_convert'
 read_mp3.cpp:(.text+0x2a36): undefined reference to `av_frame_free'
 read_mp3.cpp:(.text+0x2a40): undefined reference to `swr_free'
 read_mp3.cpp:(.text+0x2a48): undefined reference to `avcodec_close'
 read_mp3.cpp:(.text+0x2a52): undefined reference to `avformat_free_context'

 collect2: error: ld returned 1 exit status


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Revert "lavfi/avfiltergraph : add check before free the format"
7 août 2020, par Andreas RheinhardtRevert "lavfi/avfiltergraph : add check before free the format"
This reverts commit f156f4ab2317f22bfef33c7eaead0d5d5f162903.
The checks added by said commit are nonsense because they did not help
in case ff_merge_samplerates() or ff_merge_formats() returned NULL
while freeing one of its arguments : Said freeing does not change
the local variables of can_merge_formats().Reviewed-by : Nicolas George <george@nsup.org>
Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
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