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• play video with secure link in laravel ffmpeg

  1er mars 2023, par abc abc

  I convert my video file to m3u8 with ffmpeg and upload in download host.
I have no problem when I want to display Blade in Laravel without a secure link.

  


  Now, I am asking my friends to help me display those videos using a safe link, something like this link :

  


  https://dl4.your-domain.com/stream.m3u8?path=path-to-your-video-of-m3u8&expires=1677764366&signature=3e302aedefa62b4414beba4957927afa

  


  I did it myself without a secure link and got the output.
These are the routes I defined :

  


  Route::get('/video/secret/{key}', function ($key) {
    return Storage::disk('secrets')->download('29/' . $key);
})->name('video.key');
 
Route::get('/video/{playlist}', function ($playlist) {
    return FFMpeg::dynamicHLSPlaylist()
        ->fromDisk('static')
        ->open("stream/video/29/{$playlist}")
        ->setKeyUrlResolver(function ($key) {
            return route('video.key', ['key' => $key]);
        })
        ->setMediaUrlResolver(function ($mediaFilename) {
            return Storage::disk('static')->url("stream/video/29/{$mediaFilename}");
        })
        ->setPlaylistUrlResolver(function ($playlistFilename) {
            return route('video.playlist', ['playlist' => $playlistFilename]);
        });
})->name('video.playlist');


  


  This is the source of the video :

  


  <code class="echappe-js">&lt;script src=&quot;https://cdn.rawgit.com/video-dev/hls.js/18bb552/dist/hls.min.js&quot;&gt;&lt;/script&gt;&#xA;    &lt;script&gt;&amp;#xA;        document.addEventListener(&amp;#x27;DOMContentLoaded&amp;#x27;, () =&gt; {&amp;#xA;            const source = &quot;{{ route(&amp;#x27;video.playlist&amp;#x27;, [&amp;#x27;playlist&amp;#x27; =&gt; &amp;#x27;29.m3u8&amp;#x27;]) }}&quot;;&amp;#xA;            const video = document.querySelector(&amp;#x27;#video&amp;#x27;);&amp;#xA; &amp;#xA;            const defaultOptions = {};&amp;#xA; &amp;#xA;            if (!Hls.isSupported()) {&amp;#xA;                video.src = source;&amp;#xA;                var player = new Plyr(video, defaultOptions);&amp;#xA;            } else {&amp;#xA;                // For more Hls.js options, see https://github.com/dailymotion/hls.js&amp;#xA;                const hls = new Hls();&amp;#xA;                hls.loadSource(source);&amp;#xA; &amp;#xA;                // From the m3u8 playlist, hls parses the manifest and returns&amp;#xA;                        // all available video qualities. This is important, in this approach,&amp;#xA;                        // we will have one source on the Plyr player.&amp;#xA;                       hls.on(Hls.Events.MANIFEST_PARSED, function (event, data) {&amp;#xA; &amp;#xA;                           // Transform available levels into an array of integers (height values).&amp;#xA;                          const availableQualities = hls.levels.map((l) =&gt; l.height)&amp;#xA;                      availableQualities.unshift(0) //prepend 0 to quality array&amp;#xA; &amp;#xA;                          // Add new qualities to option&amp;#xA;                    defaultOptions.quality = {&amp;#xA;                        default: 0, //Default - AUTO&amp;#xA;                        options: availableQualities,&amp;#xA;                        forced: true,&amp;#xA;                        onChange: (e) =&gt; updateQuality(e),&amp;#xA;                    }&amp;#xA;                    // Add Auto Label&amp;#xA;                    defaultOptions.i18n = {&amp;#xA;                        qualityLabel: {&amp;#xA;                            0: &amp;#x27;Auto&amp;#x27;,&amp;#xA;                        },&amp;#xA;                    }&amp;#xA; &amp;#xA;                    hls.on(Hls.Events.LEVEL_SWITCHED, function (event, data) {&amp;#xA;                      var span = document.querySelector(&quot;.plyr__menu__container [data-plyr=&amp;#x27;quality&amp;#x27;][value=&amp;#x27;0&amp;#x27;] span&quot;)&amp;#xA;                      if (hls.autoLevelEnabled) {&amp;#xA;                        span.innerHTML = `AUTO (${hls.levels[data.level].height}p)`&amp;#xA;                      } else {&amp;#xA;                        span.innerHTML = `AUTO`&amp;#xA;                      }&amp;#xA;                    })&amp;#xA; &amp;#xA;                     // Initialize new Plyr player with quality options&amp;#xA;                     var player = new Plyr(video, defaultOptions);&amp;#xA;                 });&amp;#xA; &amp;#xA;            hls.attachMedia(video);&amp;#xA;                window.hls = hls;&amp;#xA;            }&amp;#xA; &amp;#xA;            function updateQuality(newQuality) {&amp;#xA;              if (newQuality === 0) {&amp;#xA;                window.hls.currentLevel = -1; //Enable AUTO quality if option.value = 0&amp;#xA;              } else {&amp;#xA;                window.hls.levels.forEach((level, levelIndex) =&gt; {&amp;#xA;                  if (level.height === newQuality) {&amp;#xA;                    console.log(&quot;Found quality match with &quot; &amp;#x2B; newQuality);&amp;#xA;                    window.hls.currentLevel = levelIndex;&amp;#xA;                  }&amp;#xA;                });&amp;#xA;              }&amp;#xA;            }&amp;#xA;        });&amp;#xA;    &lt;/script&gt;&#xA;

  


  But these work without secure links and signatures.
I want to create a secure link using token, signature and expires for each part of the video.
It means to close the direct access on the download host and to access the video files only through Laravel.
Thank you if anyone knows how to help.

  


  Something similar to the following link to display the video :

  


  https://dl4.your-domain.com/stream.m3u8?path=path-to-your-video-of-m3u8&expires=1677764366&signature=3e302aedefa62b4414beba4957927afa

  


• Unable to link against FFmpeg libaries

  2 mars 2023, par Cody

  I tried to build this, but always got link-time error.

  



  #include <libavutil></libavutil>log.h>    &#xA;int main(int argc, char *argv[])&#xA;{&#xA;    ::av_log_set_flags(AV_LOG_SKIP_REPEATED);&#xA;    return 0;&#xA;}&#xA;

  



  My distro is Debian GNU/Linux 8 (jessie). The FFmpeg was built by myself, and the configure command was...

  



  $ ./configure --prefix=/usr/local --disable-static --enable-shared \
> --extra-ldflags='-Wl,-rpath=/usr/local/lib'


  



  The link-error is as follows.

  



  $ g++ foo.cpp -D__STDC_CONSTANT_MACROS -Wall \
> -Wl,-rpath=/usr/local/lib \
> $(pkg-config --cflags --libs libavutil)
/tmp/ccKzgEFb.o: In function `main':
foo.cpp:(.text+0x17): undefined reference to `av_log_set_flags(int)'
collect2: error: ld returned 1 exit status


  



  where the output of pkg-config is...

  



  $ pkg-config --cflags --libs libavutil
-I/usr/local/include -L/usr/local/lib -lavutil


  



  The objdump shows that the shared object libavutil.so does have av_log_set_flogs inside.

  



  $ objdump --dynamic-syms /usr/local/lib/libavutil.so | grep 'av_log_set_flags'
000260f0 g    DF .text  0000000a  LIBAVUTIL_54 av_log_set_flags


  



  Please note that the g++ command used to build the above application had a linker option -Wl,-rpath=/usr/local/lib, though it still doesn't work. Also, I've tried to monitor with inotifywait if the other version provided by the distro were called. They were not, and the one being opened during execution of g++ was /usr/local/lib/libavutil.so.

  



  Summary :

  



  


  1. /usr/local/lib/libavutil.so does have the symbol.

  


  2. -rpath was used to force to link against the shared library.

  


  3. Why link-time error ? T_T

  


  



  Any suggestion or information would be highly appreciated ! Thanks !

  



  REEDIT : ffplay works fine and ldd shows it use /usr/local/lib/libavutil.so. So, the libraries seems not broken, and the problem becomes how to build my own codes to use the libraries.

  


• Problems about c# uses the VideoWriter class in dynamic link libraries(c++ and opencv) [closed]

  11 mai 2023, par Paul_Dx

  error : (-5:Bad argument) CAP_IMAGES : can't find starting number (in the name of file) : in function 'cv::icvExtractPattern'.

  


  I used c++ and opencv to implement the video recording function, and then generated the code to dynamically link libraries for c# to call.But when I run the code, I get an error.

  


  I have a general understanding that opencv calls the ffmpeg package(because of the videowriter class), so I import opencv_videoio_ffmpeg470_64.dll into the project.But the problem was not solved.