Recherche avancée

Sur d’autres sites (7677)

• Video encoding and decoding by the player during online playback [closed]

  10 janvier 2024, par rahkarenovin

  I made a player to stream the video.

  


  I want to do 32-bit encoding on the video with the help of ffmpeg.
so that the video will only play in my player.

  


  The problems I have :

  


  


  1. I want to put my 32-bit password in the player, the player will check this password while playing the video, if the password is the same, the video will be played.

     


  


  2. I don't know how to decode the video with the below player.

     


  


  


  What code is needed ? What command can I use to decode the video ?

  


  My player code :

  


  <div class="grid">&#xA;    <main>&#xA;        <div>&#xA;            &#xA;            &#xA;        </div>&#xA;    </main>&#xA;</div>&#xA;&#xA;<code class="echappe-js">&lt;script&amp;#xA;    type=&quot;text/javascript&quot;&amp;#xA;    src=&quot;https://cdn.polyfill.io/v2/polyfill.min.js?features=es6,Array.prototype.includes,CustomEvent,Object.entries,Object.values,Math.trunc&quot;&amp;#xA;    crossorigin=&quot;anonymous&quot;&amp;#xA;&gt;&lt;/script&gt;&#xA;&#xA;&lt;script type=&quot;text/javascript&quot; src=&quot;https://cdn.plyr.io/3.5.2/plyr.js&quot;&gt;&lt;/script&gt;&#xA;&#xA;&lt;script type=&quot;text/javascript&quot; src=&quot;https://cdn.jsdelivr.net/npm/hls.js@latest&quot;&gt;&lt;/script&gt;&#xA;&#xA;&lt;script&gt;&amp;#xA;    const source = &amp;#x27;https://bitdash-a.akamaihd.net/content/sintel/hls/playlist.m3u8&amp;#x27;;&amp;#xA;    const player = new Plyr(&amp;#x27;#player&amp;#x27;);&amp;#xA;    var video = document.getElementById(&amp;#x27;player&amp;#x27;);&amp;#xA;    if(Hls.isSupported()) {&amp;#xA;       var hls = new Hls();&amp;#xA;       hls.loadSource(source);&amp;#xA;       hls.attachMedia(video);&amp;#xA;       hls.on(Hls.Events.MANIFEST_PARSED,function() {&amp;#xA;           video.play();&amp;#xA;        });&amp;#xA;    }else if (video.canPlayType(&amp;#x27;application/vnd.apple.mpegurl&amp;#x27;)) {&amp;#xA;       video.src = source;&amp;#xA;       video.addEventListener(&amp;#x27;loadedmetadata&amp;#x27;,function() {&amp;#xA;           video.play();&amp;#xA;        });&amp;#xA;    }&amp;#xA;&lt;/script&gt;&#xA;

  


• rtmp stream error with ffmpeg desktop capture on electron js

  9 septembre 2020, par Berk Coşar

  I'm making a program that captures the desktop converts it to rtmp stream.

  


  Working logic of the program.

  


  


  • users will click the stream button on electron js window

    


  


  • The program will run ffmpeg shell code that captures the desktop as rtmp stream on the backend.

    


    my ffmpeg command to run for macOS Catalina on the backend :

    


    ffmpeg -f avfoundation -i 1:0 -pixel_format nv12 -vcodec libx264 -preset ultrafast -pix_fmt yuv422p -s 1280x800 -r 30 -b:v 1500k -bufsize 1500k -maxrate 7000k -c:a aac -b:a 128k -ac 2 -ar 44100 -f flv rtmp ://192.168.0.109/live

    


  


  • And It will play stream on vlc

    


  


  


  Okay. this Ffmpeg command is running successfully on terminal but unsuccessfully on electron js.

  


  Error code :

  


  


  stream.js:172 Error : Command failed :
/Users/macbook/Pictures/relteco/ffmpeg.sh ffmpeg version 4.3.1
Copyright (c) 2000-2020 the FFmpeg developers built with Apple clang
version 11.0.3 (clang-1103.0.32.62) configuration :
—prefix=/usr/local/Cellar/ffmpeg/4.3.1 —enable-shared —enable-pthreads —enable-version3 —enable-avresample —cc=clang —host-cflags= —host-ldflags= —enable-ffplay —enable-gnutls —enable-gpl —enable-libaom —enable-libbluray —enable-libdav1d —enable-libmp3lame —enable-libopus —enable-librav1e —enable-librubberband —enable-libsnappy —enable-libsrt —enable-libtesseract —enable-libtheora —enable-libvidstab —enable-libvorbis —enable-libvpx —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxml2 —enable-libxvid —enable-lzma —enable-libfontconfig —enable-libfreetype —enable-frei0r —enable-libass —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-librtmp —enable-libspeex —enable-libsoxr —enable-videotoolbox —disable-libjack —disable-indev=jack libavutil 56. 51.100 / 56. 51.100 libavcodec 58. 91.100 / 58. 91.100 libavformat 58. 45.100 /
58. 45.100 libavdevice 58. 10.100 / 58. 10.100 libavfilter 7. 85.100 / 7. 85.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 7.100 / 5. 7.100 libswresample 3. 7.100 /
3. 7.100 libpostproc 55. 7.100 / 55. 7.100 [AVFoundation indev @ 0x7fd3a8e0ce80] Configuration of video device failed, falling back
to default. [avfoundation @ 0x7fd3a900ea00] Selected pixel format
(yuv420p) is not supported by the input device. [avfoundation @
0x7fd3a900ea00] Supported pixel formats : [avfoundation @
0x7fd3a900ea00] uyvy422 [avfoundation @ 0x7fd3a900ea00] yuyv422
[avfoundation @ 0x7fd3a900ea00] nv12 [avfoundation @ 0x7fd3a900ea00]
0rgb [avfoundation @ 0x7fd3a900ea00] bgr0 [avfoundation @
0x7fd3a900ea00] Overriding selected pixel format to use uyvy422
instead. /Users/macbook/Pictures/relteco/ffmpeg.sh : line 3 : 10253
Abort trap : 6 ffmpeg -f avfoundation -i 1:0 -vcodec libx264
-preset ultrafast -pix_fmt yuv422p -s 1280x800 -r 30 -b:v 1500k -bufsize 1500k -maxrate 7000k -c:a aac -b:a 128k -ac 2 -ar 44100 -f flv rtmp ://192.168.0.109/live

  


  at ChildProcess.exithandler (child_process.js:312)&#xA;at ChildProcess.emit (events.js:310)&#xA;at maybeClose (internal/child_process.js:1021)&#xA;at Socket.<anonymous> (internal/child_process.js:443)&#xA;at Socket.emit (events.js:310)&#xA;at Pipe.<anonymous> (net.js:672)&#xA;</anonymous></anonymous>

  


  


  when command is running in terminal :

  


  enter image description here

  


  My tried javascript library's

  


  

  • Child_process

    

    • exec

    


    • execfile

    


    • spawn

    


    


  


  • shelljs

  


  • fluent-ffmpeg

  


  


  last i wrote this ffmpeg command on .sh file and saved and i tried run ffmpeg.sh file with this librarys but they all gave the same error.

  


  My idea :
yuv420p caught my attention and i searched it but i learned yuv420p is not error , this was a ffmpeg warning.That's why js see the warning as a error and it send response me stdout as stderr ?

  


  Thanks..

  


• What is the ideal image format extraction for YUV color space and lossless compression from mxf video format using ffmpeg

  15 février 2016, par DragonDance27

  I would like to be able to work on frames from an .mxf video file. The image format of the video is JPEG 2000, using a YUV color space with 4:2:2 subsampling and lossless compression.

  My intentions are to extract frames from this video using ffmpeg. Extracted frames would then be processed in Matlab (at the moment I’m interested in performing colorization).

  I want to extract the frames with as minimal data loss as possible and I would like to work in the YUV color space. I understand PNG involves a lossless process, but only involves the RGB color space - so not an option.

  I think I can extract jpeg2000 frames in the YUV color space, but I’m not sure if I’m losing data from the compression process. I attempted the following code in ffmpeg :

  ffmpeg -i video.mxf -r 1/5 out%03d.jp2

  ... however, the extracted jp2 files are unreadable in various software, including HiView which is a specialised JPEG 2000 software.

  Quesiton 1 : Is this jpeg 2000 extraction method lossless ? What am I doing wrong ?

  I also considered extracting the images in the tiff format where I can achieve the YUV and lossless requirements. I attempted the following code in ffmpeg :

  ffmpeg -i video.mxf -vcodec tiff f%10d.tif

  ... however, the extracted tiff files are unreadable in software such as paint, paint.net and windows photo viewer.

  Question 2 : Is this tiff extraction method correct ? What am I doing wrong ?

  Question 3 : What is an ideal image format that covers my YUV and lossless requirements ?