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Carte de Schillerkiez
13 mai 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Texte
Autres articles (45)
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MediaSPIP Core : La Configuration
9 novembre 2010, parMediaSPIP Core fournit par défaut trois pages différentes de configuration (ces pages utilisent le plugin de configuration CFG pour fonctionner) : une page spécifique à la configuration générale du squelettes ; une page spécifique à la configuration de la page d’accueil du site ; une page spécifique à la configuration des secteurs ;
Il fournit également une page supplémentaire qui n’apparait que lorsque certains plugins sont activés permettant de contrôler l’affichage et les fonctionnalités spécifiques (...) -
Les vidéos
21 avril 2011, parComme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...) -
Participer à sa traduction
10 avril 2011Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
Actuellement MediaSPIP n’est disponible qu’en français et (...)
Sur d’autres sites (5133)
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Problems piping ffmpeg to flac encoder
19 mai 2019, par Sebastian OlsenI need to encode a flac file with seektables, ffmpeg’s flac encoder does not include seektables, so I need to use the flac CLI. I’m trying to make it possible to convert any arbitrary audio file to a seekable flac file by first piping it through ffmpeg, then to the flac encoder.
export const transcodeToFlac: AudioTranscoder<{}> = ({
source,
destination
}) => {
return new Promise((resolve, reject) => {
let totalSize = 0
const { stdout: ffmpegOutput, stderr: ffmpegError } = spawn("ffmpeg", [
"-i",
source,
"-f",
"wav",
"pipe:1"
])
const { stdout: flacOutput, stdin: flacInput, stderr: flacError } = spawn(
"flac",
["-"]
)
flacOutput.on("data", (buffer: Buffer) => {
totalSize += buffer.byteLength
})
ffmpegError.on("data", error => {
console.log(error.toString())
})
flacError.on("data", error => {
console.log(error.toString())
})
//stream.on("error", reject)
destination.on("finish", () => {
resolve({
mime: "audio/flac",
size: totalSize,
codec: "flac",
bitdepth: 16,
ext: "flac"
})
})
ffmpegOutput.pipe(flacInput)
flacOutput.pipe(destination)
})
}While this code works, the resulting flac file is not correct. The source audio is of duration
06:14
, but the flac file is of duration06:45:47
. Encoding the flac manually without piping ffmpeg to it works fine, but I cannot do that in a server environment where I need to utilize streams.Here’s what the flac encoder outputs when transcoding :
flac 1.3.2
Copyright (C) 2000-2009 Josh Coalson, 2011-2016 Xiph.Org Foundation
flac comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
welcome to redistribute it under certain conditions. Type `flac' for details.
-: WARNING: skipping unknown chunk 'LIST' (use --keep-foreign-metadata to keep)
-: WARNING, cannot write back seekpoints when encoding to stdout
-: 0% complete, ratio=0.357
0% complete, ratio=0.432
0% complete, ratio=0.482
0% complete, ratio=0.527
0% complete, ratio=0.541
1% complete, ratio=0.554
1% complete, ratio=0.563
1% complete, ratio=0.571
size= 36297kB time=00:03:30.70 bitrate=1411.2kbits/s speed= 421x
1% complete, ratio=0.572
1% complete, ratio=0.570
1% complete, ratio=0.577
1% complete, ratio=0.583
1% complete, ratio=0.584
1% complete, ratio=0.590
1% complete, ratio=0.592
size= 64512kB time=00:06:14.49 bitrate=1411.2kbits/s speed= 421x
video:0kB audio:64512kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead:
0.000185%
-: WARNING: unexpected EOF; expected 1073741823 samples, got 16510976 samples
2% complete, ratio=0.579 -
Nginx rtmp exec command not working in macOS
8 janvier 2020, par JoshThe nginx rtmp exec command not working on my macOS.
I checked the error log file and saw this error.2019/05/19 19:45:24 [alert] 32986#0: kevent() error on 13 filter:-1 flags:4002 (2: No such file or directory)
I have no idea what is that mean and i searched so much about it and i didn’t find anything.
Config file
rtmp {
server {
listen 8080;
chunk_size 4096;
application publish {
live on;
record off;
allow publish all;
allow play all;
exec echo "" > /test.txt;
# I even test that command with bash file
exec /Users/josh/Projects/server/test.sh;
}
application hls {
live on;
record off;
hls on;
hls_path /usr/local/nginx/html/live;
hls_fragment 15s;
}
}
} -
10bit DPX to DNXHR_444 with FFmpeg causing colour shift
15 août 2019, par Josh NortheastI’m trying to build a python application to convert a 10bit DPX sequence to a 4k DNXHR_444 MOV with a Arri to Rec709 lut, just as I would in Davcincci resolve.
ffmpeg -f image2 -framerate 24 -pattern_type glob -i INPUT.dpx -c:v dnxhd -profile:v dnxhr_444 -vf lut3d=ArriAlexa_LogCtoRec709_Resolve.cube,colormatrix=bt601:bt709 -pix_fmt yuv444p10le -c:a pcm_s16le -y -timecode 00:00:41:16 OUTPUT.mov
When comparing the output to the dpx in resolve with the lut on it, there is a slight colour shift making everything slightly more red. Even when i take the lut out of the ffmpeg code, there is still a slight redness. The colourmatrix helps a bit to get it closer but it isn’t close enough. Any ideas why I can’t get them to match ?
LOG :
ffmpeg -f image2 -framerate 24 -pattern_type glob -i /dpx/*.dpx -c:v dnxhd -profile:v dnxhr_444 -vf lut3d=/Arri/ArriAlexa_LogCtoRec709_Resolve.cube,colormatrix=bt601:bt709 -pix_fmt yuv444p10le -c:a pcm_s16le -y -timecode 00:00:41:16 /dpx/test.mov
ffmpeg version 4.2-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
Input #0, image2, from '/dpx/*.dpx':
Duration: 00:00:07.67, start: 0.000000, bitrate: N/A
Stream #0:0: Video: dpx, gbrp10le, 4096x1716 [SAR 1:1 DAR 1024:429], 24 tbr, 24 tbn, 24 tbc
Stream mapping:
Stream #0:0 -> #0:0 (dpx (native) -> dnxhd (native))
Press [q] to stop, [?] for help
Output #0, mov, to '/dpx/test.mov':
Metadata:
timecode : 00:00:41:16
encoder : Lavf58.29.100
Stream #0:0: Video: dnxhd (DNXHR 444) (AVdh / 0x68645641), yuv444p10le, 4096x1716 [SAR 1:1 DAR 1024:429], q=2-1024, 200 kb/s, 0.04 fps, 12288 tbn, 24 tbc
Metadata:
encoder : Lavc58.54.100 dnxhd
frame= 184 fps=1.9 q=1.0 Lsize= 1117250kB time=00:00:07.62 bitrate=1200316.8kbits/s speed=0.0799x
video:1117248kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000187%Here is a :
- JPG - reference of what the DPX + LUT should look like
- DPX - a frame of the dpx sequence I’m trying to convert to DNXHR_444
- the ArriLogC_to_Rec709 LUT to be applied to the DPX
Let me know if you need anything else.
https://drive.google.com/drive/folders/1j2Qq1sV5ZJJsMYe3DOFOV0dnQ3VIotcw
Cheers,
Josh