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  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
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  • Publier sur MédiaSpip

    13 juin 2013

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  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
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  • FFMPEG Replacing black color fragments with alpha channel transperency

    31 décembre 2017, par kostya572

    I have "file.mov" video. It has a lot of blank black color fragments that have different durations.

    I need to replace black color fragments that durates more than 5 seconds with transparency ? Is that possible to add some alpha channel for that purpose ?

  • Convert video to hequirect while setting the background black and blur the transitional area [closed]

    11 février 2024, par Zurechtweiser

    I am using

    


    ffmpeg -i input.mp4 -vf "v360=input=fisheye:ih_fov=122.6:iv_fov=94.4:output=hequirect:h_fov=180:v_fov=180:in_stereo=2d:out_stereo=sbs,format=yuv420p" -b:v 25M -maxrate 60M -bufsize 25M output.mp4


    


    Which works as advertised to convert a fisheye to hequirect except for two problems :

    


      


    1. The background is not black but seems to try and set it to the average color of the video. It should be black throughout.

      


      2. 


    2. The corners are not blurred but should be, there should be a soft transition from the corner of the video into black.

      


      3. 


    


  • Can't Titan Black use NVENC ?

    13 mars 2016, par SPWW

    I compiled FFMPEG with —enable-nvenc and want to encode with NVENC encoder, but I got this error message when running ffmpeg.

    [nvenc_h264 @ 0x8ed020] 4 CUDA capable devices found
    
[nvenc_h264 @ 0x8ed020] [ GPU #0 - < GeForce GTX TITAN Black > has Compute SM 3.5, NVENC Not Available ]
    
[nvenc_h264 @ 0x8ed020] [ GPU #1 - < GeForce GTX TITAN Black > has Compute SM 3.5, NVENC Not Available ]
    
[nvenc_h264 @ 0x8ed020] [ GPU #2 - < GeForce GTX TITAN Black > has Compute SM 3.5, NVENC Not Available ]
    
[nvenc_h264 @ 0x8ed020] [ GPU #3 - < GeForce GTX TITAN Black > has Compute SM 3.5, NVENC Not Available ]
    
[nvenc_h264 @ 0x8ed020] No NVENC capable devices found

    I have titan black gpu and as the official document said it should be supported.

    my nvenc-sdk version is 5.0

    and the nvidia-smi info is listed below.

    ~> nvidia-smi
    
Wed Jan  6 16:36:55 2016
    
+------------------------------------------------------+
    
| NVIDIA-SMI 352.39     Driver Version: 352.39         |
    
|-------------------------------+----------------------+----------------------+
    
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
    
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
    
|===============================+======================+======================|
    
|   0  GeForce GTX TIT...  Off  | 0000:02:00.0     Off |                  N/A |
    
| 54%   82C    P2   215W / 250W |   4422MiB /  6143MiB |     77%      Default |
    
+-------------------------------+----------------------+----------------------+
    
|   1  GeForce GTX TIT...  Off  | 0000:04:00.0     Off |                  N/A |
    
| 55%   82C    P2   160W / 250W |   5926MiB /  6143MiB |     84%      Default |
    
+-------------------------------+----------------------+----------------------+
    
|   2  GeForce GTX TIT...  Off  | 0000:83:00.0     Off |                  N/A |
    
| 58%   83C    P2   147W / 250W |   5926MiB /  6143MiB |     68%      Default |
    
+-------------------------------+----------------------+----------------------+
    
|   3  GeForce GTX TIT...  Off  | 0000:84:00.0     Off |                  N/A |
    
| 53%   83C    P2   191W / 250W |   3155MiB /  6143MiB |     85%      Default |
    
+-------------------------------+----------------------+----------------------+

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