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• Downloading a specific segment of a YouTube video

  18 mai 2018, par BlueStone

  I normally download files or parts of them using ffmepg command.

  ffmpeg -ss 00:05:00 -i "video url here "   -t 100 -c copy   -avoid_negative_ts 1 out.mkv  
  

  Now, downloading a YouTube video is not problem using youtube-dl, but I want to download specific part of a video (1080p+), I thought I could use youtube-dl to grab the link of the video and pass it to ffmpeg to do the cutting with the previous code, but could not figure how to do this.

  Searched and tried many commands and stuff here and there, but nothing worked.

• Adding audio to mp4 using ffmpeg at certain offset gives output file #0 does not contain any stream

  18 mai 2018, par Armand

  I am attempting to add audio to a MP4 file using ffmpeg at a specific time, eventually I also want the audio to only play until a certain point, so if you can help with that also that would be great, otherwise if you can just assist me in figuring out what is causing this error.

  The arguments I use

  -y "E:\Documents\Content Bar/Photo Booth\PhotosDrop\2018-05-15 14-01-16OUT.mp4" -itsoffset  -i "E:\Downloads\wetransfer-250b26\05 Call of Love.mp3" -map 0:0 -map 1:0 -c:v copy -shortest "E:\Documents\Content Bar\Photo Booth\PhotosDrop\2018-05-15 14-01-16OUTOUT.mp4"
  

  This results in the following error:

  ffmpeg version N-81646-gc19da0c Copyright (c) 2000-2016 the FFmpeg developers
    built with gcc 5.4.0 (GCC)
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
    libavutil      55. 29.100 / 55. 29.100
    libavcodec     57. 55.101 / 57. 55.101
    libavformat    57. 48.103 / 57. 48.103
    libavdevice    57.  0.102 / 57.  0.102
    libavfilter     6. 62.100 /  6. 62.100
    libswscale      4.  1.100 /  4.  1.100
    libswresample   2.  1.100 /  2.  1.100
    libpostproc    54.  0.100 / 54.  0.100
  Output #0, mp4, to 'E:\Documents\Content Bar/Photo Booth\PhotosDrop\2018-05-15 14-01-16OUT.mp4':
  Output file #0 does not contain any stream
  

• Extract video thumbnail using PHP without ffmpeg

  18 mai 2018, par SharpAffair

  The question is similar to: Is there any way to create a video thumbnail through PHP without ffmpeg? However, that thread is 6-year old and technologies have evolved since then.

  Any way to extract a thumbnail from uploaded MP4 file using PHP?

  Ffmpeg is great, but unfortunately unsupported on shared hosting accounts, requiring a dedicated server. And it's a kinda overkill to use ffmpeg's power just to generate a video preview picture.

  Any other simple solution?

• How do I rotate a video around the vertical and horizontal axis by two different angles ?

  18 mai 2018, par Brutus Cruciatus

  My goal is to rotate a video around the vertical and horizontal axis by two different angles to get a certain perspective.

  Now perspective assumes coordinates of the current view to straighten the video, I want to create perspective with angles.

  I am sure, one can abuse the perspective filter to get what I want.

  How do I rotate a video around the vertical and horizontal axis by two different angles?

• MP4 codec support in Chromium

  18 mai 2018, par Staggan

  We have integrated Chromium Embedded Framework into our Windows game to allow us to render web pages from within our application, and everything works fine, except MP4 videos.

  I understand Chromium does not include this codec due to licensing issues, but can anyone provide details on how we can add support, even if we have to license a codec for it.

  All the information we can find seems to be old, and the functions referred to appear to be deprecated... so we are at a bit of a loss.

  All the video serving networks we have spoken to appear to serve MP4s.. so changing encoding does not seem to be an option.

  Any advice would be greatly appreciated.

  Thanks