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• ffmpeg extensionless ts file [closed]

  15 avril, par Erv00

  I want to download a video file that is streamed with HLS.
  
Unfortunately, the .m3u8 file references the segments that have no extension, and thus the HLS demuxer throws the following error :

  


  detected format mpegts extension none mismatches allowed extensions in url <the url="url">&#xA;</the>

  


  The url is like https://example.com/segment3

  


  I have tried to allow all extensions with -allowed_extensions ALL,none, but this does not work.
  
My question is, how can I make this work, without having to download all segments by hand ?

  


• C# Encoding/Decoding WPF Frames

  12 juillet 2014, par Jean-Philippe Encausse

  I’m building a C# windows application on top of EmguCV manipulating Kinect/Camera frame. I’d like to encode and save my byte[] to a video file.

  1. What codec should I use for a good compression/cpu ? It seems H264 is THE best algorithm.

  2. I tried EmguCV VideoWriter, with a FOURCC codec (video for windows). But it seems there is no free working X264 codec (the x264vfw.exe codec is too slow, eat some frames and popup a window). I also try with vp8vfw-setup-1.2.0.exe (Google VP80) but it do not works on Windows8 x64 ...

  3. It seems many people use FFMpeg C# wrapper for video encoding. But I don’t know how to pipe byte[] to ffmpeg ? Codec seems better than FOURCC ?

  4. Some other articles talk about MediaFoundation, but I can’t find any samples in C#.

  What should I do ? I’m looking for an answer for decoding video to byte[] too.

• FFmpeg : Merge two videos using a transparent frame for the overlay video [closed]

  29 octobre 2024, par Major West

  I'm trying to overlay a video with another one that I'd like to place in the upper left corner and surround it with a transparent (bubble-)border using a png-file.

  


  The following milestones I've already achieved :

  


  

  • Placing the bubble at the right spot in the main video, retaining the transparency effect

  


  


  ffmpeg -i main.mp4 -loop 1 -i bubble.png -filter_complex "[1]format=yuva420p,fade=in:st=0:d=5:alpha=1[pip]; [0][pip]overlay=100:100:shortest=1" -c:v libx264 output_1.mp4


  


  

  • Placing the overlay video inside the bubble-border

  


  


  ffmpeg -y -i overlay.mp4 -loop 1 -t 1 -i bubble.png -filter_complex "color=black:d=1[c];[c][0]scale2ref[cs][v];[cs]setsar=1[ct]; [1:v]alphaextract,negate[m];[m][ct]scale2ref[ms][ol];[ms]setsar=1[alf]; [ol][alf]alphamerge[fin]; [v][fin]overlay,scale=1920:1080:force_original_aspect_ratio=decrease[fv]; [fv]pad=1920:1080:(ow-iw)/2:(oh-ih)/2:#000000@1[v]" -map "[v]" -map 0:a output_2.mp4


  


  (Maybe that one can be achieved a bit more efficiently I guess ...)

  


  What I cannot figure out is how to merge these two resulting files or how to do it in a single command, so that the transparency effect is not lost. Currently I'm getting a black border outside of the bubble when I'm done merging.

  


  So how can this be achieved using ffmpeg ?
  
And is there a way to do the second part a bit more efficiently ?