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Autres articles (10)

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Contribute to documentation

    13 avril 2011

    Documentation 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 (...)

  • Other interesting software

    13 avril 2011, par

    We 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 : (...)

Sur d’autres sites (3322)

  • Add a moving watermark that changes position every x seconds with ffmpeg

    8 novembre 2019, par David Tran

    Currently, I add a watermark to the bottom right of my video to prevent others from republishing it. However, they blur the watermark so I’m thinking of adding a moving watermark that changes its position every x seconds.

    Below is my current ffmpeg command :

    ffmpeg -i input.mp4 -i logo.png -filter_complex "[1][0]scale2ref=iw/4:ow*90/272[wm][vid];[vid][wm]overlay=W-w-W*10/100:H-h-H*5/100" -preset veryfast output.mp4

    How can I make the watermark position from the bottom right to top right, to top left, and bottom left every 30 seconds ? Thank you.

  • ffmpeg : Saving RTSP stream with overlapping segments

    23 janvier 2017, par iamyojimbo

    I have an RTSP stream and I need to segment it with 2s segments with 1s overlaps.

    i.e.

    t(s): 0----1----2----3----4----5----6----7----8----9----10---->
    

    
vids: |--1.mp4--|--3.mp4--|--5.mp4--|--7.mp4--|--9.mp4--|
    
           |--2.mp4--|--4.mp4--|--6.mp4--|--8.mp4--|

    I can split to 2s segments, every 2 seconds, but I can’t see how I can split to 2s segments every one second.

    So far I have used the below :

    ffmpeg \
    
-i rtsp://192.168.1.124:8553/unicast \
    
-c copy -flags +global_header \
    
-f segment \
    
-segment_time 2 \
    
-segment_format_options movflags=+faststart \
    
-reset_timestamps 1 \
    
%d.mp4 \

    The approach I was thinking was to copy the stream, delay by 1s and then segment that separately but this seems wasteful and there’s no way to guarantee the overlap.

    Any ideas ?

  • Faastest way to duplicate (encode) a frame using JavaCV ffmpeg ?

    16 juin 2014, par user1592546

    I want to encode several videos with different frame rates in the same output video using FFmpegFrameRecorder, as fast as possible. I am thinking to duplicate frames in case I want to increase frame rate, and skip frames when I need to decrease frame rate. I am using JavaCV.

    Is there any better way of duplicating frames except for calling record(image) twice ? (the output is always h264 stored in mp4 file format) Something like a flag in h264 stream indicating that current frame is a duplicate of last one, or something else to skip the redundant encoding.

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