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Autres articles (57)
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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 -
Other interesting software
13 avril 2011, parWe don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
We don’t know them, we didn’t try them, but you can take a peek.
Videopress
Website : http://videopress.com/
License : GNU/GPL v2
Source code : (...) -
Contribute to documentation
13 avril 2011Documentation is vital to the development of improved technical capabilities.
MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
To contribute, register to the project users’ mailing (...)
Sur d’autres sites (10331)
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movenc : mark Opus encapsulation as stable
23 mars 2020, par Lynnemovenc : mark Opus encapsulation as stable
The specifications are de-facto frozen now as they've already been used in
production for years, the author has indicated reluctance on IRC to change
it further, and the only potential changes would, from what I understand,
be forward-compatible. -
ffmpeg segmentation fails with floating point exception
19 août 2020, par painfulenglishI'm trying to segment a video using the following command :


ffmpeg -i /home/user/videos/0001.MP4 -codec copy -map 0 -f segment -segment_frames 66 /tmp/boos/0001/0001_%03d.MP4


After working for a few seconds, the output being


frame= 251 fps=0.0 q=-1.0 size=N/A time=00:00:10.02 bitrate=N/A speed=19.6x 


the process fails with a floating point exception. The full output is given below. I have a suspicion that the problem may be specific to GoPro videos due to the following observations :


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- The same video is segmented successfully if I first re-encode it using ffmpeg.
- Other videos (non-GoPro) do not cause the problem.






I would appreciate any suggestions on how to track down or even solve the problem.


Full output :


ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
 built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
 configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
 libavutil 55. 78.100 / 55. 78.100
 libavcodec 57.107.100 / 57.107.100
 libavformat 57. 83.100 / 57. 83.100
 libavdevice 57. 10.100 / 57. 10.100
 libavfilter 6.107.100 / 6.107.100
 libavresample 3. 7. 0 / 3. 7. 0
 libswscale 4. 8.100 / 4. 8.100
 libswresample 2. 9.100 / 2. 9.100
 libpostproc 54. 7.100 / 54. 7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/broadbelt/videos/0001.MP4':
 Metadata:
 major_brand : mp41
 minor_version : 538120216
 compatible_brands: mp41
 creation_time : 2019-11-18T13:55:42.000000Z
 firmware : HD7.01.01.80.00
 Duration: 00:17:38.22, start: 0.000000, bitrate: 30245 kb/s
 Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 30000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
 Metadata:
 creation_time : 2019-11-18T13:55:42.000000Z
 handler_name : GoPro AVC 
 encoder : GoPro AVC encoder
 timecode : 13:55:42:21
 Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s (default)
 Metadata:
 creation_time : 2019-11-18T13:55:42.000000Z
 handler_name : GoPro AAC 
 timecode : 13:55:42:21
 Stream #0:2(eng): Data: none (tmcd / 0x64636D74) (default)
 Metadata:
 creation_time : 2019-11-18T13:55:42.000000Z
 handler_name : GoPro TCD 
 timecode : 13:55:42:21
 Stream #0:3(eng): Data: none (gpmd / 0x646D7067), 37 kb/s (default)
 Metadata:
 creation_time : 2019-11-18T13:55:42.000000Z
 handler_name : GoPro MET 
 Stream #0:4(eng): Data: none (fdsc / 0x63736466), 9 kb/s (default)
 Metadata:
 creation_time : 2019-11-18T13:55:42.000000Z
 handler_name : GoPro SOS 
<span style="background-color:#2E3436"><font color="#FF87FF">[segment @ 0x562a95062f40] </font></span>Opening &apos;/tmp/boost/0001/0001_000.MP4&apos; for writing
<span style="background-color:#2E3436"><font color="#FF87FF">[mp4 @ 0x562a9506a600] </font></span><span style="background-color:#2E3436"><font color="#FF0000">Timecode frame rate must be specified</font></span>
Output #0, segment, to &apos;/tmp/boost/0001/0001_%03d.MP4&apos;:
 Metadata:
 major_brand : mp41
 minor_version : 538120216
 compatible_brands: mp41
 firmware : HD7.01.01.80.00
 encoder : Lavf57.83.100
 Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 30000 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
 Metadata:
 creation_time : 2019-11-18T13:55:42.000000Z
 handler_name : GoPro AVC 
 encoder : GoPro AVC encoder
 timecode : 13:55:42:21
 Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s (default)
 Metadata:
 creation_time : 2019-11-18T13:55:42.000000Z
 handler_name : GoPro AAC 
 timecode : 13:55:42:21
 Stream #0:2(eng): Data: none (tmcd / 0x64636D74) (default)
 Metadata:
 creation_time : 2019-11-18T13:55:42.000000Z
 handler_name : GoPro TCD 
 timecode : 13:55:42:21
 Stream #0:3(eng): Data: none (gpmd / 0x646D7067), 37 kb/s (default)
 Metadata:
 creation_time : 2019-11-18T13:55:42.000000Z
 handler_name : GoPro MET 
 Stream #0:4(eng): Data: none (fdsc / 0x63736466), 9 kb/s (default)
 Metadata:
 creation_time : 2019-11-18T13:55:42.000000Z
 handler_name : GoPro SOS 
Stream mapping:
 Stream #0:0 -&gt; #0:0 (copy)
 Stream #0:1 -&gt; #0:1 (copy)
 Stream #0:2 -&gt; #0:2 (copy)
 Stream #0:3 -&gt; #0:3 (copy)
 Stream #0:4 -&gt; #0:4 (copy)
Press [q] to stop, [?] for help
**Floating point exception (core dumped)me=00:00:01.00 bitrate=N/A speed=0.143x** 


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AForge.Video.VideoFileWriter, Video Quality loss after a second
29 décembre 2019, par Just another DevI tried to use AForge to create mp4 video from images..but experience this quality loss after about 1 - 2 second into the video. Just wondering if anyone knows what went wrong with my code ?
using AForge.Video.FFMPEG;
VideoFileWriter writer = new VideoFileWriter();
writer.Open(fileName, _width, _height, _frameRate, VideoCodec.MPEG4, 800000);
var s = AForge.Imaging.Image.FromFile(@"[path]\image.jpg");
int frameCount = _frameRate * scene.Time;
for (int i = 0; i < frameCount; i++)
{
writer.WriteVideoFrame(s);
}
writer.Close();I use the above code to create a 3 second 1080p video with frame rate 60, bit rate 800k, and using this image as an example : https://www.bushandbeach.co.nz/wp-content/uploads/2019/05/A-Taste-of-Auckland-Full-Day-1-opt.jpg
the output video is in here : https://youtu.be/j0z7711cyOM
as you can see the image quality seems to be ok, for about 2 seconds and then it blurs out in the last second.
Thanks so much
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