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• Read a text file line-by-line (each line as an array), run bash command with array elements, then loop to the next line in the text file

  10 janvier, par xiaohouzi

  I'm using immich to manage my media library with photos and videos but appropriate video thumbnails are black or do not have an appropriate thumbnails for my family to view. As a test, I decided to manually recreate the thumbnails and then update appropriate thumbs files in the exact directory ; replacing the auto-generated ones by Immich using ffmpeg. The following script works fine but one by one will take forever.

  


  #!/bin/bash
file=(formula1 "aust_gp_00'23'41_2022_1858658849.mp4" f2dfse3-34gd-23ff-6hdd-p3h4kk/a3/10/a399-dj88-ah29 00:00:30.000)

# create jpeg + webp and replace existing
sudo ffmpeg -i /mnt/f1/"${file[0]}"/"${file[1]}" -ss "${file[3]}" -frames:v 1 /immich/app/thumbs/"${file[2]}"-preview.jpeg -y \
&& \
sudo ffmpeg -i /mnt/f1/"${file[0]}"/"${file[1]}" -ss "${file[3]}" -frames:v 1 /immich/app/thumbs/"${file[2]}"-thumbnail.webp -y


  


  My goal is to put all the needed files in a text file use "readarry" to read each line as an array, use the appropriate index and then repeat for the next line. This is where I am stuck. How could I loop through each line where each line is a new file, keep the same indexes, and repeat ? Anyone familiar with how to accomplish this or if there is a better way using bash ? I was hoping to only use bash instead of python.

  


  For example...

  


  #files.txt
file=(formula1 "aust_gp_00'23'41_2022.mp4" f2dfse3-34gd-23ff-6hdd-p3h4kk/a3/10/a399-dj88-ah29 00:00:30.000)
file=(formula1 "belg_gp_00'13'31_2022.mp4" f2dfse3-34gd-23ff-6hdd-p3h4kk/q4/6/mhf-846d-zpyf 00:00:30.000)
file=(formula1 "melb_gp_00'05'11_2022.mp4" f2dfse3-34gd-23ff-6hdd-p3h4kk/b9/2/q3dd-0988-vr2t 00:00:30.000)



  


  # genthumb.sh
#!/bin/bash
readarray -t lines < files.txt &&
  for line in "${!lines[@]}"; do
    sudo ffmpeg -i /mnt/f1/"${lines[0]}"/"${lines[1]}" -ss "${lines[3]}" -frames:v 1 /immich/app/thumbs/"${lines[2]}"-preview.jpeg -y \
    && \
    sudo ffmpeg -i /mnt/f1/"${file[0]}"/"${file[1]}" -ss "${file[3]}" -frames:v 1 /immich/app/thumbs/"${file[2]}"-thumbnail.webp -y
  done


  


• lavc/encode : add an encoder-specific get_buffer() variant

  23 mars 2022, par Anton Khirnov

  lavc/encode : add an encoder-specific get_buffer() variant
  Several encoders (roqvideo, svq1, snow, and the mpegvideo family)
  
  currently call ff_get_buffer(). However this function is written
  
  assuming it is called by a decoder. Though nothing has been obviously
  
  broken by this until now, that may change in the future.
  To avoid potential future issues, introduce a simple encode-specific
  
  wrapper around avcodec_default_get_buffer2() and enforce its use in
  
  encoders.
  

  • [DH] libavcodec/decode.c
  • [DH] libavcodec/encode.c
  • [DH] libavcodec/encode.h
  • [DH] libavcodec/mpegpicture.c
  • [DH] libavcodec/roqvideoenc.c
  • [DH] libavcodec/snow.c
  • [DH] libavcodec/svq1enc.c

• Museum of Multimedia Software, Part 4

  20 août 2010, par Multimedia Mike — Software Museum

  This is the last part of the series, at least until some more multimedia software shows up at my favorite thrift shop or the other boneyards I scavenge.

  Miscellaneous Multimedia Programs
  This set includes the titles Matinee FMV Screensaver, MetaCreations Painter Classic, and Multimedia JumpStart. The second one is likely a creation program. I have no idea what the third one is, while the first title gives me chills just thinking about the implications.

  
  
  

  Miscellaneous Creativity Software
  Magic Theatre and Microsoft Home : Creative Writer. I think I loaded up the former once to find a very basic animation program. The latter isn’t necessarily multimedia-related but certainly classifies as creative software. It also reminds me of the ad I once spied in Entertainment Weekly magazine during the mid-1990s for a Microsoft music history CD-ROM. MS branched out into all kinds of niches.

  
  
  

  More Multimedia Creativity Software
  VideoCraft and U-Create Games & Animation. I wager these would be fun to play around with if I had the time.

  
  
  

  Showcase CD-ROMs
  "What Can You Make ? Showcase 7" from Macromedia and Microsoft Multimedia Pack 10.

  
  
  

  Basic Multimedia Software Discs
  As a multimedia nerd, these Apple QuickTime and Microsoft Video for Windows discs make me sentimental.

  
  
  

  Real Software Collection
  Grit your teeth and gaze upon CD-ROM distributions of Real’s software. There is a RealAudio disc back from when Real still called themselves Progressive Networks. "Everything you need to hear the web roar !"

  
  
  

  Clips
  And a few multimedia clip CD-ROMs, along with a disc that promises to test and tune your MPC setup.

  
  
  

  Wrap-Up
  I would be remiss if I neglected to mention a few more pieces of multimedia creation software in my collection. First, there’s the Barbie Storymaker. I actually gave that one a go, as you can tragically see from that link. Further, the Taco Bell fast food restaurant chain ran, as one of their many kids meal promotions, a series of 4 simple Comics Constructor CD-ROMs. I played briefly with it here and again during an exploration of XML data formats and the parsing thereof (which the software uses).