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La sauvegarde automatique de canaux SPIP
1er avril 2010, parDans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...) -
Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...)
Sur d’autres sites (10395)
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Android Studio - Append two videos but showing black screen
6 septembre 2020, par DarkhmarFirst of all hello,


When I add another mp4 file at the end of an mp4 file, the video looks completely black screen but I can get the video sounds.


If I add a copy of a video to the end of it, I saw that there was no problem, but this is not a scenario I want.


I am getting the "text relocations" error when merging with the FFmpeg library. (This problem is fixed when I change this library version, but I have other problems. Therefore, mp4parser is an alternative I see.)


The piece of code that allows the videos to be merged is as follows. Thank you from now.


private void appendTwoVideos(String firstVideoPath, String secondVideoPath) {
 try {
 Movie[] inMovies = new Movie[2];

 inMovies[0] = MovieCreator.build(firstVideoPath);
 inMovies[1] = MovieCreator.build(secondVideoPath);

 List<track> videoTracks = new LinkedList<>();
 List<track> audioTracks = new LinkedList<>();

 for (Movie m : inMovies) {
 for (Track t : m.getTracks()) {
 if (t.getHandler().equals("soun")) {
 audioTracks.add(t);
 }
 if (t.getHandler().equals("vide")) {
 videoTracks.add(t);
 }
 }
 }

 Movie result = new Movie();

 if (audioTracks.size() > 0) {
 result.addTrack(new AppendTrack(audioTracks
 .toArray(new Track[audioTracks.size()])));
 }
 if (videoTracks.size() > 0) {
 result.addTrack(new AppendTrack(videoTracks
 .toArray(new Track[videoTracks.size()])));
 }

 BasicContainer out = (BasicContainer) new DefaultMp4Builder().build(result);

 @SuppressWarnings("resource")
 FileChannel fc = new RandomAccessFile(DIRECTORY_PATH + "output.mp4", "rw").getChannel();
 out.writeContainer(fc);
 fc.close();
 } catch (FileNotFoundException e) {
 e.printStackTrace();
 } catch (IOException e) {
 e.printStackTrace();
 }
}
</track></track>

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Trying to concatenate 11 seconds of black video onto the end of a 5 min video. Getting non-monotonous DTS in output stream error
14 janvier 2020, par TidusWulfI have a video shot from my smartphone that is 3840x2160@57.74. Originally, it was exactly 5 minutes long. I replaced the audio with a music file that is 5 minutes and 11 seconds using
ffmpeg -i video.mp4 -i audio.mp3 -c copy -map 0:v:0 -map 1:a:0 output.mp4I expected 11 seconds of black at the end, but instead the video output freezes on the last frame for 11 seconds. There’s definitely something funky going on because when I try to upload to youtube, it only sees the first 5 minutes. The last 10 seconds of audio get dropped.I tried making a second black clip with
ffmpeg -f lavfi -i color=c=black:s=uhd2160:r=57.74 -t 11 -pix_fmt yuv420p blk2.mp4. When I try to concat the two files withffmpeg -f concat -safe 0 -i list.txt -c copy teacup6.mp4I get a huge list of errors such as[mp4 @ 00000166fda994c0] Non-monotonous DTS in output stream 0:0; previous: 27002920, current: 3728954; changing to 27002921. This may result in incorrect timestamps in the output file.for what appears to be about 11 seconds worth of frames, so basically the entire 11 second black clip. When I play it in VLC it goes black, but I suspect it’s not actually processing/playing 11 seconds of good black video because if I click along the track timeline, visual glitches start happening in the canvas.Here is what ffmpeg tells me about my inputs and outputs as far as framerate, pixel format, etc.
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000239e6cb2880] Auto-inserting h264_mp4toannexb bitstream filter
Input #0, concat, from 'list.txt':
Duration: N/A, start: -0.023021, bitrate: 72244 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 3840x2160, 71994 kb/s, SAR 1:1 DAR 16:9, 57.74 fps, 59 tbr, 90k tbn, 180k tbc
Metadata:
handler_name : VideoHandle
Stream #0:1(und): Audio: mp3 (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 250 kb/s
Metadata:
handler_name : SoundHandler
Output #0, mp4, to 'teacup5.mp4':
Metadata:
encoder : Lavf58.35.102
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 3840x2160 [SAR 1:1 DAR 16:9], q=2-31, 71994 kb/s, 57.74 fps, 59 tbr, 90k tbn, 90k tbc
Metadata:
handler_name : VideoHandle
Stream #0:1(und): Audio: mp3 (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 250 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 helpalternatively, I tried to make a black 3840x2160 png file and create an 11 second slideshow. It didn’t turn out any better. I tried a single image for 11 seconds @ 57.74fps, I also tried a looping slideshow of that one image, looping on every single frame, at 57.74 fps. I should note that wether a slideshow or a color generator, the filesize for the 11 seconds of black comes out to about 160KB. Strangely small in my opinion, but I was chalking it up to a good compression algorithm.
I tried to do this in Da Vinci Resolve 16.1 instead and the video wouldn’t play. I also couldn’t find a way to maintain the same unusual 57.74 framerate with the free version, so it was undesirable anyway. I tried to re-process using Handbrake, but it threw an error. The output of the Handbrake processed video file also gets stuck on the last frame of the video, instead of going to black.
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ffmpeg return black and white image
16 décembre 2011, par njaiVideo capture device is kworld dvd maker 2 (em2861)
It returns the image in "black and white" with green line at the bottom of screen ; but when I tested it with webcam, it worked properly.Here is 30s video. http://www.youtube.com/watch?v=7q2wFGVwGGI
How can I convert it to color ?
[root@localhost ~]# ffmpeg -f video4linux2 -i /dev/video0 -vcodec mpeg4 -y output.mp4
ffmpeg version git-2011-11-05-5fd1a69, Copyright (c) 2000-2011 the FFmpeg developers
built on Nov 5 2011 21:10:52 with gcc 4.4.4 20100726 (Red Hat 4.4.4-13)
configuration: --enable-libx264 --enable-gpl --enable-libvpx
libavutil 51. 23. 0 / 51. 23. 0
libavcodec 53. 27. 0 / 53. 27. 0
libavformat 53. 18. 0 / 53. 18. 0
libavdevice 53. 4. 0 / 53. 4. 0
libavfilter 2. 47. 0 / 2. 47. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0
[video4linux2,v4l2 @ 0x2a64780] Estimating duration from bitrate, this may be inaccurate
Input #0, video4linux2,v4l2, from '/dev/video0':
Duration: N/A, start: 1320637788.113946, bitrate: 165888 kb/s
Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 165888 kb/s, 25 tbr, 1000k tbn, 25 tbc
Incompatible pixel format 'yuyv422' for codec 'mpeg4', auto-selecting format 'yuv420p'
[buffer @ 0x2a63920] w:720 h:576 pixfmt:yuyv422 tb:1/1000000 sar:0/1 sws_param:
[buffersink @ 0x2a63cc0] auto-inserting filter 'auto-inserted scale 0' between the filter 'src' and the filter 'out'
[scale @ 0x2a64560] w:720 h:576 fmt:yuyv422 -> w:720 h:576 fmt:yuv420p flags:0x4
Output #0, mp4, to 'output.mp4':
Metadata:
encoder : Lavf53.18.0
Stream #0:0: Video: mpeg4 ( [0][0][0] / 0x0020), yuv420p, 720x576, q=2-31, 200 kb/s, 25 tbn, 25 tbc
Stream mapping:
Stream #0.0 -> #0.0 (rawvideo -> mpeg4)
Press [q] to stop, [?] for help
frame= 969 fps= 25 q=31.0 Lsize= 1547kB time=00:00:38.76 bitrate= 327.0kbits/s
video:1538kB audio:0kB global headers:0kB muxing overhead 0.561411%
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