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Autres articles (74)

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    5 septembre 2013, par

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  • Ecrire une actualité

    21 juin 2013, par

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    Vous pouvez personnaliser le formulaire de création d’une actualité.
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Sur d’autres sites (7125)

  • Music discord js bot issue

    12 mars 2019, par Eric Sim

    Does anyone know how I would go about resolving this error ?

    My Discord.JS music bot would just simply crashes when trying to play some old songs. The Discord.JS bot is currently being hosted on herokuapp.

    19-03-12T15:08:08.576483+00:00 app[worker.1]: /app/node_modules/ytdl-core-discord/node_modules/prism-media/src/core/FFmpeg.js:41
    
2019-03-12T15:08:08.576496+00:00 app[worker.1]:     this._readableState = this._reader._readableState;
    
2019-03-12T15:08:08.576499+00:00 app[worker.1]:                                        ^
    
2019-03-12T15:08:08.576501+00:00 app[worker.1]: 
    
2019-03-12T15:08:08.576502+00:00 app[worker.1]: TypeError: Cannot read property '_readableState' of undefined
    
2019-03-12T15:08:08.576504+00:00 app[worker.1]:     at new FFmpeg (/app/node_modules/ytdl-core-discord/node_modules/prism-media/src/core/FFmpeg.js:41:40)
    
2019-03-12T15:08:08.576506+00:00 app[worker.1]:     at ytdl.getInfo (/app/node_modules/ytdl-core-discord/index.js:23:24)
    
2019-03-12T15:08:08.576508+00:00 app[worker.1]:     at fn (/app/node_modules/ytdl-core/lib/info.js:365:9)
    
2019-03-12T15:08:08.576510+00:00 app[worker.1]:     at util.parallel (/app/node_modules/ytdl-core/lib/info.js:232:11)
    
2019-03-12T15:08:08.576511+00:00 app[worker.1]:     at checkDone (/app/node_modules/ytdl-core/lib/util.js:405:7)
    
2019-03-12T15:08:08.576513+00:00 app[worker.1]:     at SAXParser.parser.onend (/app/node_modules/ytdl-core/lib/info.js:288:26)
    
2019-03-12T15:08:08.576515+00:00 app[worker.1]:     at emit (/app/node_modules/sax/lib/sax.js:624:35)
    
2019-03-12T15:08:08.576517+00:00 app[worker.1]:     at end (/app/node_modules/sax/lib/sax.js:667:5)
    
2019-03-12T15:08:08.576519+00:00 app[worker.1]:     at SAXParser.write (/app/node_modules/sax/lib/sax.js:975:14)
    
2019-03-12T15:08:08.576520+00:00 app[worker.1]:     at SAXParser.close (/app/node_modules/sax/lib/sax.js:157:38)

  • FFMPEG video merging. Only first video shows

    13 mars 2019, par James Ashworth

    I’m trying to put 7 second intro video before another one, but I keep having trouble with it. I don’t need to do anything else then add intros to videos.

    This is what I’m currently getting.

    (for %i in (*.mp4) do @echo file '%i') > mylist.txt
    

    
ffmpeg -f concat -safe 0 -i mylist.txt -c copy output.mp4
    

    

    

    

    

    
    C:\Users\Business>cd desktop
    

    
C:\Users\Business\Desktop>cd testfile
    

    
C:\Users\Business\Desktop\Testfile>(for %i in (*.mp4) do @echo file '%i') > mylist.txt
    

    
C:\Users\Business\Desktop\Testfile>
    
C:\Users\Business\Desktop\Testfile>(for %i in (*.mp4) do @echo file '%i') > mylist.txt
    

    
C:\Users\Business\Desktop\Testfile>ffmpeg -f concat -i mylist.txt -c copy output.mp4
    
ffmpeg version N-93308-g1144d5c96d Copyright (c) 2000-2019 the FFmpeg developers
    
  built with gcc 8.2.1 (GCC) 20190212
    
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt  
    

    
libavutil      56. 26.100 / 56. 26.100
    
  libavcodec     58. 47.103 / 58. 47.103
    
  libavformat    58. 26.101 / 58. 26.101
    
  libavdevice    58.  6.101 / 58.  6.101
    
  libavfilter     7. 48.100 /  7. 48.100
    
  libswscale      5.  4.100 /  5.  4.100
    
  libswresample   3.  4.100 /  3.  4.100
    
  libpostproc    55.  4.100 / 55.  4.100
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000261c7072c00] Auto-inserting h264_mp4toannexb bitstream filter
    
Input #0, concat, from 'mylist.txt':
    
  Duration: N/A, start: -0.042667, bitrate: 2453 kb/s
    
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 2325 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s
    
    Metadata:
    
      handler_name    : SoundHandler
    
Output #0, mp4, to 'output.mp4':
    
  Metadata:
    
    encoder         : Lavf58.26.101
    
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, q=2-31, 2325 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s
    
    Metadata:
    
      handler_name    : SoundHandler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (copy)
    
Press [q] to stop, [?] for help
    
frame=110209 fps=3246 q=-1.0 Lsize= 1103461kB time=01:01:17.41 bitrate=2458.1kbits/s speed= 108x
    
video:1042171kB audio:57353kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.358030%
    

    
C:\Users\Business\Desktop\Testfile>

    It shows the 7 second video as the whole video. Someway i got it to change after 7 seconds, but then the rest of the video was really buddy.

  • ffmpeg, /dev/video0, -f decklink

    20 mars 2019, par Camille Goudeseune

    I’m trying to capture video from a PCI card, the Blackmagic DeckLink Mini Recorder, via ffmpeg, on a headless host running Ubuntu 18.04.2 LTS, hopefully with a command like

    ffmpeg -f decklink -i /dev/video0 ...

    How can I make that work ? I have two obstacles.

    No /dev/video0

    ffmpeg -i /dev/video0 ... fails : /dev/video0: No such device or address.
    v4l2-ctl --list-devices fails with the same error message.

    I built /dev/video0, and it looks okay :

    mknod /dev/video0 c 81 0
    
chown root.video /dev/video0
    
chmod g+rw /dev/video0

    To compare this file with a working one, I ran strace cat /dev/video0 on this host, and on another host (Ubuntu 14) with a working /dev/video0. The outputs began to differ here (good, then bad) :

    fstat(1, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
    
open("/dev/video0", O_RDONLY)           = 3  
    
fstat(3, {st_mode=S_IFCHR|0660, st_rdev=makedev(81, 0), ...}) = 0
    
fadvise64(3, 0, 0, POSIX_FADV_SEQUENTIAL) = 0
    
----
    

    
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0
    
openat(AT_FDCWD, "/dev/video0", O_RDONLY) = -1 ENXIO (No such device or address)

    So /dev/video0 is broken at a level lower than ffmpeg or v4l2 or even cat.

    On Ubuntu 14, man 8 MAKEDEV suggests that the error message means that "the kernel does not have the driver configured or loaded."

    This Ubuntu 18 host lacks that manpage, but it does have a few /snap/core/*/sbin/MAKEDEV, all the same, so I tried

    /snap/core/6350/sbin/MAKEDEV -n -v video

    It would have created over a hundred devices videoXX, radioXX, vtxXX, vbiXX. Those devices didn’t exist yet, so it seemed harmless to try it.

    rm /dev/video0; /snap/core/6350/sbin/MAKEDEV video

    That rebuilt /dev/video0, but "No such device" remains, from cat or ffmpeg.

    No decklink

    ffmpeg -f decklink ... fails with Unknown input format: 'decklink'.

    Neither black nor deck nor link is mentioned by ffmpeg -devices (fbdev, lavfi, oss, v4l2) and ffmpeg -formats (about 350), either for Ubuntu’s own version 3.4.4-0ubuntu0.18.04.1, or for version N-93330-g7ff89574c7 compiled from source on 2019 Mar 13 :

    git clone https://git.ffmpeg.org/ffmpeg.git ffmpeg
    
cd ffmpeg
    
./configure --enable-nonfree --disable-doc --disable-w32threads --enable-pthreads

    (Although ./configure --help mentions --enable-decklink, using that yielded "ERROR : DeckLinkAPI.h not found." updatedb && locate DeckLinkAPI.h finds no file with that name, either.)

    The DeckLink PCI card is recognized by hwinfo and lspci.

    lsmod reports the loaded modules blackmagic and blackmagic_io.

    Maybe the PCI card is installed ok, but ffmpeg just can’t reach it because I can’t configure it for that.

    Edit : Rebooting didn’t fix anything.

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