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Autres articles (65)
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Des sites réalisés avec MediaSPIP
2 mai 2011, parCette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page. -
Modifier la date de publication
21 juin 2013, parComment changer la date de publication d’un média ?
Il faut au préalable rajouter un champ "Date de publication" dans le masque de formulaire adéquat :
Administrer > Configuration des masques de formulaires > Sélectionner "Un média"
Dans la rubrique "Champs à ajouter, cocher "Date de publication "
Cliquer en bas de la page sur Enregistrer -
Personnaliser en ajoutant son logo, sa bannière ou son image de fond
5 septembre 2013, parCertains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;
Sur d’autres sites (9541)
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Why won't this encrypted HLS video play on iOS (but works on Windows Chrome via hls.js library) ?
8 mai 2023, par RyanI am trying to play an MP4 test video.


My
/home/vagrant/Code/example/public/hls_hls.keyInfois :

https://example.com/hls.key
/home/vagrant/Code/example/public/hls_hls.key
467216aae8a26fb699080812628031955e304a66e9e4480f9b70d31d8fe94e9a


My
/home/vagrant/Code/example/public/hls_hls.keywas generated using PHP :hex2bin('467216aae8a26fb699080812628031955e304a66e9e4480f9b70d31d8fe94e9a')

The ffmpeg command for encrypting the video as HLS playlist with "ts" files :


'/usr/bin/ffmpeg' '-y' '-i' 'storage/app/sample_media2/2020-02-27/Sample_Videos_5.mp4' 
'-c:v' 'libx264' '-s:v' '1920x1080' '-crf' '20' '-sc_threshold' '0' '-g' '48' 
'-keyint_min' '48' '-hls_list_size' '0' 
'-hls_time' '10' '-hls_allow_cache' '0' '-b:v' '4889k' '-maxrate' '5866k' 
'-hls_segment_type' 'mpegts' '-hls_fmp4_init_filename' 'output_init.mp4' 
'-hls_segment_filename' 'storage/app/public/test/output_1080p_%04d.ts' 
'-hls_key_info_file' '/home/vagrant/Code/example/public/hls_hls.keyInfo' 
'-strict' '-2' '-threads' '12' 'storage/app/public/test/output_1080p.m3u8'


Then, I know from https://caniuse.com/#search=hls that Windows Chrome won't be able to play the HLS video without a library, so I use https://github.com/video-dev/hls.js/, and Windows Chrome successfully plays the encrypted video !


However, iOS Safari is unable to play it (with or without the hls.js library).


On iOS Safari, when I try to play the video, I see just a quick glimpse (less than a second) where the screen shows 0:15, so it must be reading and decrypting enough to know the correct duration of the video.


So, to debug, I log events :


const nativeHlsEvents = ['play', 'playing', 'abort', 'error', 'canplaythrough', 'waiting', 'loadeddata', 'loadstart', 'progress', 'timeupdate', 'volumechange'];
$.each(nativeHlsEvents, function (i, eventType) {
 video.addEventListener(eventType, (event) => {//https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement
 console.log(eventType, event);
 if (eventType === 'error') {
 console.error(video.error);//https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/error
 }
 });
});


I see in the console log :


loadstart, {"isTrusted":true}
progress, {"isTrusted":true}
play, {"isTrusted":true}
waiting, {"isTrusted":true}
error, {"isTrusted":true}
video.error, {}


I don't know how to find more details about the error.


Note that even though Windows Chrome successfully plays the video, it too shows warnings in the console log :


{"type":"mediaError","details":"fragParsingError","fatal":false,"reason":"TS packet did not start with 0x47","frag":{"...
{"type":"mediaError","details":"fragParsingError","fatal":false,"reason":"no audio/video samples found","frag":{...


Where is my problem ?


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Create animated gif from a set of png images
12 avril 2020, par Zizi96I'm trying to use ffpmeg to convert a list of png to a gif.



Running
C:\Users\Me\Art\Animations\wubz\output> dirshows my files :


12/04/2020 16:48 <dir> ..
12/04/2020 16:45 136,706 wubz_0001.png
12/04/2020 16:45 136,180 wubz_0002.png
12/04/2020 16:45 136,413 wubz_0003.png
12/04/2020 16:45 136,099 wubz_0004.png
12/04/2020 16:45 136,309 wubz_0005.png
12/04/2020 16:45 137,172 wubz_0006.png
</dir>


The code I'm running in command prompt from
C:\Users\Me\Art\Animations\wubz\output>:


ffmpeg-f image2 -framerate 30 -i wubz_%d.png video.flv



gives the error message :

[image2 @ 000001efd6c4bac0] Could find no file with path 'wubz_%d.png' and index in the range 0-4
wubz_%d.png: No such file or directory


Can someone explain what I'm doing wrong, I don't get why ffmpeg isn't seeing the png files in the output directory.


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Start of video is not labeled as "0" in QuickTime Video from GoPro
26 mars 2020, par John TerragnoliI’m trying to combine four GoPro videos into a single video, and then rotate it 90 degrees. However, the time scales on the bottom of the videos are all wrong. The videos are 17 minutes and 42 second. But the beginning time is labeled as 5:15:20:32 and the ending time is 5:33:01:32. It just looks really weird and I’d like to fix it. After I use ffmpeg to rotate and concatenate the videos, the problem persists. Could it possibly be fixed with Exiftool ?
ffmpeg -safe 0 -f concat -i list.txt -vcodec copy -acodec copy merged_videos.MP4ffmpeg -i input.mov -vf "transpose=1" output.movHere is the exiftool information on one of the videos :
File Name : GOPR3023.MP4
Directory : .
File Size : 3.7 GB
File Modification Date/Time : 2018:04:12 14:56:16-05:00
File Access Date/Time : 2020:03:25 12:17:18-05:00
File Inode Change Date/Time : 2020:03:25 17:57:04-05:00
File Permissions : rwxrwxrwx
File Type : MP4
File Type Extension : mp4
MIME Type : video/mp4
Major Brand : MP4 v1 [ISO 14496-1:ch13]
Minor Version : 2013.10.18
Compatible Brands : mp41
Movie Data Size : 4001979951
Movie Data Offset : 28
Movie Header Version : 0
Create Date : 2018:04:12 14:38:32
Modify Date : 2018:04:12 14:38:32
Time Scale : 60000
Duration : 0:17:42
Preferred Rate : 1
Preferred Volume : 100.00%
Preview Time : 0 s
Preview Duration : 0 s
Poster Time : 0 s
Selection Time : 0 s
Selection Duration : 0 s
Current Time : 0 s
Next Track ID : 6
Firmware Version : HD5.03.02.51.00
Lens Serial Number : NAH6092300301117
Camera Serial Number Hash : 34676f2cdf49b86a1514817a93377bf7
Track Header Version : 0
Track Create Date : 2018:04:12 14:38:32
Track Modify Date : 2018:04:12 14:38:32
Track ID : 1
Track Duration : 0:17:42
Track Layer : 0
Track Volume : 0.00%
Image Width : 1920
Image Height : 1080
Graphics Mode : srcCopy
Op Color : 0 0 0
Compressor ID : avc1
Source Image Width : 1920
Source Image Height : 1080
X Resolution : 72
Y Resolution : 72
Compressor Name : GoPro AVC encoder
Bit Depth : 24
Color Representation : nclx 1 1 1
Video Frame Rate : 59.94
Time Code : 3
Balance : 0
Audio Format : mp4a
Audio Channels : 2
Audio Bits Per Sample : 16
Audio Sample Rate : 48000
Text Font : Unknown (21)
Text Face : Plain
Text Size : 10
Text Color : 0 0 0
Background Color : 65535 65535 65535
Font Name : Helvetica
Other Format : tmcd
Warning : [minor] The ExtractEmbedded option may find more tags in the movie data
Matrix Structure : 1 0 0 0 1 0 0 0 1
Media Header Version : 0
Media Create Date : 2018:04:12 14:38:32
Media Modify Date : 2018:04:12 14:38:32
Media Time Scale : 60000
Media Duration : 0:17:42
Handler Class : Media Handler
Handler Type : NRT Metadata
Handler Description : GoPro SOS
Gen Media Version : 0
Gen Flags : 0 0 0
Gen Graphics Mode : srcCopy
Gen Op Color : 0 0 0
Gen Balance : 0
Meta Format : fdsc
Image Size : 1920x1080
Megapixels : 2.1
Avg Bitrate : 30.1 Mbps
Rotation : 0Part 2
There is a pretty obvious "stutter" at the 17:42 mark where the two clips are combined. I’ve tried using ffmpeg and iMovie, but both give the same results. The GoPro broke up the event into multiple clips on it’s own so it seems weird that there would be any information missing. Is there any way to get rid of this stutter ?Thanks !
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