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• Replace video with jpg in ffmpeg

  14 septembre 2020, par ben158

  I am trying to convert an mkv with video and audio into an m4v with the same audio, but with the video replaced with a still jpg for the duration. I'm following the examples from https://trac.ffmpeg.org/wiki/Slideshow and not having any success. Every time I attempt any of these, it doesn't insert the jpg, and instead uses the original video from the mkv. I am testing the files in VLC. Any ideas what could be going wrong ? I'm inclined to think the documentation itself may be outdated or wrong.

  


  Attempts following the linked examples :

  


  -i input.mkv -loop 1 -i image.jpg -c:a ac3 -b:a 640K -c:v libx264 -shortest output.m4v

-i input.mkv -framerate 1 -i image.jpg -c:a ac3 -b:a 640K -c:v libx264 -r 30 -pix_fmt yuv420p output.m4v

-i input.mkv -framerate 1 -i image.jpg -c:a ac3 -b:a 640K -c:v libx264 -r 30 -vf format=yuv420p output.m4v


  


  The one thing I got semi-working (based on code from another source) was -i input.mkv -i image.jpg -filter_complex "[1][0]scale2ref[i][v];[v][i]overlay" -c:a ac3 -b:a 640K -c:v libx264 output.m4v but this stretches the image out (which I don't want, I want the resultant video to have the same aspect ratio as the image without black padding on the sides).

  


  I'm kicking myself because I eventually got something along the lines of the first examples working a few days ago, but somehow didn't save my work and am back to square one. Any help is appreciated, thanks in advance.

  


• phoneUS : Add N11 exclusions. Closes gh-861

  21 août 2013, par nschonni

  phoneUS : Add N11 exclusions. Closes gh-861
  Numbers like 911 and 411 cannot be used for area or exchange codes.
  
  https://en.wikipedia.org/wiki/NANPA#Numbering_system
  

• Space Adventure CD-ROM

  1er octobre 2011, par Multimedia Mike — Game Hacking

  I acquired a CD-ROM entitled Space Adventure by Knowledge Adventure (I like these people ; they make decent, entertaining educational games). The physical media displays a copyright date of 1993, very early in the multimedia era.

  
  
  

  This 1993 CD-ROM makes proud use of multimedia files. What kind ? There’s a movies/ directory with 17 .mov files. It would be way too simple if these were QuickTime files, though. These represent a custom format, and video-only since a separate sounds/ directory contains .snd files with filenames corresponding to the .mov files. The .snd files are actually Creative Voice (a.k.a. VOC) files. As for this MOV format, wiki page and samples.

  
  
  

  I was also surprised to find the binary ultrasnd.exe file among the drivers on the disc. The Gravis UltraSound was released in 1992. The sound setup utility does not have an option for the GUS, however. No matter since DOSBox has great SB/Pro/16 emulation.

  I’m also a bit puzzled about why the DOSBox screenshots are 720 x 480 (posted here are various cropping and resizings).