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• FFMPeg for Windows with ZeroMQ

  31 mai 2021, par jvhang

  Is it possible to build FFMPeg for Windows 10 and include ZeroMQ ? None of the builds I can find have it included but it seems like it is part of non-Windows builds.

  


  C++ is not my usual language so my hunch is that there may be Windows specific things blocking its inclusion but I am not certain.

  


• FFMPEG Audio stream/layer and SRT from one mkv to an other

  13 juillet 2022, par kormorfor

  I have an FFMPEG question for you !

  


  Problem :

  


  I have 2 files(x265)

  


  01.mkv with multiple audio steams and multiple subtitles (with exactly named layers)

  


  02.mkv with multiple audio steams and multiple subtitles (with exactly named layers)

  


  I would like to add specific audio layer(GER) and specific subtitle(GER)
from 02.mkv to 01 mkv at the same time if it is possible.
(The metadata positions almost always random in file 02.mkv so I can't say it is "-map 0:s:2 for ger subtitle"...)

  


  I have already searched and tried multiple solutions ...

  


  This kind of worked with multiple steps but loses audio and subtitle metadata(Title) during process.

  


  German audio layer extract from 02.mkv to aac

  


  ffmpeg -i 02.mkv -map 0:a:m:language:ger 02.aac


  


  German subtitle layer extract from 02.mkv to srt

  


  ffmpeg -i 02.mkv -map 0:s:m:language:ger 02.srt


  


  Adding extracted audio to 01.mkv

  


  ffmpeg -i 01.mkv -i 02.aac -map 0 -map 1 -codec copy outputfinall_1.mkv


  


  Adding extracted srt to 01.mkv none of this works

  


  1.)

  


  ffmpeg -i 01.mkv -i 02.srt -c copy -c:s mov_text outputfinall_2a.mkv


  


  BUG : Subtitle encoding currently only possible from text to text or bitmap to bitmap

  


  2.)

  


  ffmpeg -i 01.mkv -i 02.srt -map 0 -map 1 -codec copy outputfinall_2b.mkv


  


  works but does not show subtitles while playing only that is there.

  


  Please if you can help I would like a less jumbled mess code for this problem.
With keeping the metadata (titles) of the moved audio stream and subtitle.

  


  Thank you for your time !

  


• Concatenating Video Files using FFMPEG YUV issue

  3 novembre 2015, par SpoiledTechie.com

  I am concatenating three videos with FFMPEG.

  The 1st and 3rd video of the concatenation were pulled from an AVI file using FFMPEG and converted into MP4.

  Their codec information is below.

  

  The 2nd video in the concatenation is compiled using FFMPEG. I am compiling frames with FFMPEG to create this video.

  Its codec information is below.

  
  As you can see, the videos share the same codec, resolution and frame rate.

  The only thing they don’t share is the Decoded format. One being 4:4:4 and one being 4:2:2

  I think I understand what YUV means from this link, https://msdn.microsoft.com/en-us/library/windows/desktop/dd391027%28v=vs.85%29.aspx?f=255&MSPPError=-2147217396

  When I concatenate these three videos together, using concat demuxer, it works, but when I try to watch the final video, the video shows the first file playing just right, then the 2nd video in the final video shows up BLANK and the third video plays just fine as well.

  So my question is, how do I concat 3 MP4 files, but change what seems to be the decoded format for the 2nd video to 4:2:2. When I compile the frames, I imagine I can change the YUV format, but I don’t know how just yet.