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  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • 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
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

  • Contribute to a better visual interface

    13 avril 2011

    MediaSPIP is based on a system of themes and templates. Templates define the placement of information on the page, and can be adapted to a wide range of uses. Themes define the overall graphic appearance of the site.
    Anyone can submit a new graphic theme or template and make it available to the MediaSPIP community.

Sur d’autres sites (10892)

  • how to change the DPB size of an h.265 video with ffmpeg ？ [closed]

    31 juillet 2020, par user14027069

    I'm a novice, and I want to change the DPB size of an h.265 video with ffmpeg, so I think changing the number of reference frames should be equivalent to changing the size of DPB, but -refs has no effect：

    


    ffmpeg -i a.mp4 -refs 3 -acodec copy  -vcodec hevc -f mp4 b.mp4 


    


    how should I do ? Please help me

    


  • lower fps when using ffmpeg to convert mp4 to gif

    10 novembre 2020, par Muhia NJoroge

    I am using ffmpeg to convert high quality videos to gif, most of the videos are 60fps and over 720p, but when I use the code below, to convert the video to gif, I get very low fps for the gif output,

    



    #!/usr/bin/env
palette=/tmp/pallete.png
filter="fps=50,scale=480:-1:flags=lanczos"

ffmpeg -y  -i test.mov -vf $filter,palettegen=stats_mode=diff $palette
ffmpeg -y -i test.mov -i $palette -lavfi "$filter [x]; [x][1:v] paletteuse" test.gif


    



    another issue I have noted is - as the width increases e.g 720 instead of 480 I get even lower fps.

    



    here is output log example, the output fps is lower than the assigned 50fps

    



    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/tmp/201631203815.mp4':
Metadata:
 major_brand     : isom
 minor_version   : 512
 compatible_brands: isomiso2avc1mp41
 encoder         : Lavf56.36.100
Duration: 00:00:05.48, start: 0.016000, bitrate: 1579 kb/s

Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1334x1334, 1576 kb/s, 60.18 fps, 60 tbr, 1000k tbn, 50 tbc (default)
Metadata:
  handler_name    : VideoHandler

Input #1, png_pipe, from '/tmp/pallete.png':
   Duration: N/A, bitrate: N/A
Stream #1:0: Video: png, rgba(pc), 16x16 [SAR 1:1 DAR 1:1], 25 tbr, 25 tbn, 25 tbc

Output #0, gif, to '/tmp/201631203815.gif':
Metadata:
  major_brand     : isom
  minor_version   : 512
  compatible_brands: isomiso2avc1mp41
  encoder         : Lavf56.40.101
Stream #0:0: Video: gif, pal8, 480x480, q=2-31, 200 kb/s, 50 fps, 100 tbn, 50 tbc (default)
Metadata:
  encoder         : Lavc56.60.100 gif
Stream mapping:
   Stream #0:0 (h264) -> fps
   Stream #1:0 (png) -> paletteuse:palette
  paletteuse -> Stream #0:0 (gif)
Press [q] to stop, [?] for help

frame=  275 fps= 32 q=-0.0 Lsize=    2480kB time=00:00:05.50 bitrate=3693.5kbits/s    


    



    How do I ensure that the output fps is always whats set by the user ?
Any resource on this is highly appreciated.

    



    UPDATE

    



    i have also noticed that the use of a higher fps eg filter="fps=90,scale=480:-1:flags=lanczos" has the effect of slowing down the gif,like a slow motion effect, the output fps is still lower around 15fps,

    


  • lower fps when using ffmpeg to convert mp4 to gif

    3 juin 2016, par Muhia NJoroge

    I am using ffmpeg to convert high quality videos to gif, most of the videos are 60fps and over 720p, but when I use the code below, to convert the video to gif, I get very low fps for the gif output,

    #!/usr/bin/env
    
palette=/tmp/pallete.png
    
filter="fps=50,scale=480:-1:flags=lanczos"
    

    
ffmpeg -y  -i test.mov -vf $filter,palettegen=stats_mode=diff $palette
    
ffmpeg -y -i test.mov -i $palette -lavfi "$filter [x]; [x][1:v] paletteuse" test.gif

    another issue I have noted is - as the width increases e.g 720 instead of 480 I get even lower fps.

    here is output log example, the output fps is lower than the assigned 50fps

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/tmp/201631203815.mp4':
    
Metadata:
    
 major_brand     : isom
    
 minor_version   : 512
    
 compatible_brands: isomiso2avc1mp41
    
 encoder         : Lavf56.36.100
    
Duration: 00:00:05.48, start: 0.016000, bitrate: 1579 kb/s
    

    
Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1334x1334, 1576 kb/s, 60.18 fps, 60 tbr, 1000k tbn, 50 tbc (default)
    
Metadata:
    
  handler_name    : VideoHandler
    

    
Input #1, png_pipe, from '/tmp/pallete.png':
    
   Duration: N/A, bitrate: N/A
    
Stream #1:0: Video: png, rgba(pc), 16x16 [SAR 1:1 DAR 1:1], 25 tbr, 25 tbn, 25 tbc
    

    
Output #0, gif, to '/tmp/201631203815.gif':
    
Metadata:
    
  major_brand     : isom
    
  minor_version   : 512
    
  compatible_brands: isomiso2avc1mp41
    
  encoder         : Lavf56.40.101
    
Stream #0:0: Video: gif, pal8, 480x480, q=2-31, 200 kb/s, 50 fps, 100 tbn, 50 tbc (default)
    
Metadata:
    
  encoder         : Lavc56.60.100 gif
    
Stream mapping:
    
   Stream #0:0 (h264) -> fps
    
   Stream #1:0 (png) -> paletteuse:palette
    
  paletteuse -> Stream #0:0 (gif)
    
Press [q] to stop, [?] for help
    

    
frame=  275 fps= 32 q=-0.0 Lsize=    2480kB time=00:00:05.50 bitrate=3693.5kbits/s    

    How do I ensure that the output fps is always whats set by the user ?
    Any resource on this is highly appreciated.

    UPDATE

    i have also noticed that the use of a higher fps eg filter="fps=90,scale=480:-1:flags=lanczos" has the effect of slowing down the gif,like a slow motion effect, the output fps is still lower around 15fps,

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