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• Merge commit ’2157df425bd909854fd4afcec4aa3311d8a3b31b’

  27 août 2015, par Hendrik Leppkes

  Merge commit ’2157df425bd909854fd4afcec4aa3311d8a3b31b’
  * commit ’2157df425bd909854fd4afcec4aa3311d8a3b31b’ :
  
    hlsenc : Support outputting specific versions
  Not merged, the version is auto-selected in ffmpeg based on enabled features.
  Merged-by : Hendrik Leppkes <h.leppkes@gmail.com>
  

• What options are available for speeding up video load times on a webpage when video is hosted on IPFS

  10 août 2022, par Ryan D

  I have a site that pulls videos hosted on IPFS (Interplanetary File System), most of the videos load and play fine but if a user doesn't have a strong internet connection or if a larger video, it constantly buffer's and play's choppy.

  


  Since the video isn't hosted on my server i'm not sure what options I have to help speed the load times up. The original video is uploaded to my site though and I pass it to IPFS to upload directly. I don't currently download it to my server first to speed up the uploading process, or so the user doesn't need to wait for a double upload.

  


  I know youTube has a compression algorithm and does something with chopping up the video into chunks or something but i'm not sure exactly how that works. Im not very experienced with video codec and encoding. Ive heard good things about FFmpeg but not sure if that would help my current situation.

  


  Any ideas or tools I should look into that may help me out would be appreciated. For larger videos I could download to my server first if theres a compression mechanism or something I could apply first to help the overall load times of the site although not ideal for the user uploading.

  


  Im using videoJS for my video player with preload set to auto if that helps at all.

  


  <video width="320" height="240" controls="controls" class="video-js video" poster="{Image URL}">&#xA;    <source src="{IPFS URL}" type="video/mp4">&#xA;</source></video>&#xA;

  


  Options im currently using

  


  Load the video after the DOM has loaded to not slow down page loads

  


  Preload the video

  


  


  


  Although I don't think that does much.

  


  Other than that I don't know what else I can do. Im good with PHP and or Javascript to handle this task if theres something I should look into.

  


  Thanks !

  


• Ffmpeg and png watermark on OSX error

  28 juin 2012, par Stpn

  I am trying to add watermark with transparent background on OSX with ffmpeg.

  I am using this command :

  ffmpeg -i test.mpg -vf "movie=stuff.png, scale=100:100 [watermark]; [in][watermark] overlay=main_w-overlay_w:main_h-overlay_h-10 [out]"  out.mpg

  And I am getting this :

  ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Jun 12 2012 21:37:10 with clang 3.1 (tags/Apple/clang-318.0.54)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/0.11.1 --enable-shared --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-libfreetype --cc=/usr/bin/clang --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libass --enable-libvo-aacenc --disable-ffplay
  
    libavutil      51. 54.100 / 51. 54.100
  
    libavcodec     54. 23.100 / 54. 23.100
  
    libavformat    54.  6.100 / 54.  6.100
  
    libavdevice    54.  0.100 / 54.  0.100
  
    libavfilter     2. 77.100 /  2. 77.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  Input #0, mpeg, from 'test.mpg':
  
    Duration: 00:00:01.04, start: 1.000000, bitrate: 9106 kb/s
  
      Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p, 640x480 [SAR 1:1 DAR 4:3], 104857 kb/s, 24 fps, 24 tbr, 90k tbn, 24 tbc
  
      Stream #0:1[0x1c0]: Audio: mp2, 44100 Hz, stereo, s16, 128 kb/s
  
  File 'out.mpg' already exists. Overwrite ? [y/N] y
  
  w:640 h:480 pixfmt:yuv420p tb:1/90000 sar:1/1 sws_param:flags=2
  
  [buffersink @ 0x7ff50bc1c3e0] No opaque field provided
  
  [png @ 0x7ff50c038400] unsupported bit depth 16 and color type 4
  
  [image2 @ 0x7ff50c044800] decoding for stream 0 failed
  
  [image2 @ 0x7ff50c044800] Could not find codec parameters (Video: png, 640x480)
  
  [movie @ 0x7ff50bc17200] Failed to find stream info
  
  [movie @ 0x7ff50bc17200] seek_point:0 format_name:(null) file_name:stuff.png stream_index:0
  
  [scale @ 0x7ff50bc178c0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'Parsed_movie_0' and the filter 'Parsed_scale_1'
  
  Impossible to convert between the formats supported by the filter 'Parsed_movie_0' and the filter 'auto-inserted scaler 0'
  
  Error opening filters!

  I thought I am missing png support and I checked homebrew for libpng install, but it turn out png support is already included by Apple with OSX.

  Also I did

  ffmpeg -codecs list | grep -i png

  and I do have PNG support in ffmpeg :

  DEV D  png             PNG (Portable Network Graphics) image