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• lavc/dxv : align to 4x4 blocks instead of 16x16

  9 février 2024, par Connor Worley

  lavc/dxv : align to 4x4 blocks instead of 16x16
  The previous assumption that DXV needs to be aligned to 16x16 was
  
  erroneous. 4x4 works just as well, and FATE decoder tests pass for all
  
  texture formats.
  On the encoder side, we should reject input that isn't 4x4 aligned,
  
  like the HAP encoder does, and stop aligning to 16x16. This both solves
  
  the uninitialized reads causing current FATE tests to fail and produces
  
  smaller encoded outputs.
  With regard to correctness, I've checked the decoding path by encoding a
  
  real-world sample with git master, and decoding it with
  
    ffmpeg -i dxt1-master.mov -c:v rawvideo -f framecrc -
  
  The results are exactly the same between master and this patch.
  On the encoding side, I've encoded a real-world sample with both master
  
  and this patch, and decoded both versions with
  
    ffmpeg -i dxt1-master,patch.mov -c:v rawvideo -f framecrc -
  
  Under this patch, results for both inputs are exactly the same.
  In other words, the extra padding gained by 16x16 alignment over 4x4
  
  alignment has no impact on decoded video.
  Signed-off-by : Connor Worley <connorbworley@gmail.com>
  
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavcodec/dxv.c
  • [DH] libavcodec/dxvenc.c
  • [DH] tests/ref/fate/dxv3enc-dxt1

• Python Docker SDK long command to container [duplicate]

  2 avril 2021, par Neil Bernard

  I need to send a fairly long command using python docker SDK

  


  ffmpeg -f lavfi -re -i smptebars=duration=60:size=1280x720:rate=30 -f lavfi -re -i sine=frequency=1000:duration=60:sample_rate=44100 -pix_fmt yuv420p -c:v libx264 -b:v 1000k -g 30 -keyint_min 120 -profile:v baseline -preset veryfast -f mpegts "srt://127.0.0.1:4200?pkt_size=1316"


  


  I have an example where you ned to wrap each element in double quotes.

  


  container1 = client.containers.run("alpine", ["echo", "hello", "world"],name='autotest', detach=True)


  


  2 Questions

  


  Is there an elegant way to do this ?
If not how do I handle the bits that already have quotes ?

  


• ffmpeg : Need to convert source video to web/phone html5 players. Willing to pay [on hold]

  25 juillet 2015, par mariotanenbaum

  I need somebody to write me commands for converting videos and i’m willing to pay that.

  I need to convert most of these : (if ffmpeg doesn’t support any of those, just ignore it)

  mov (QuickTime Movie)
  mp4 (MPEG-4 Video)
  mpe (MPEG Video)
  mpeg (MPEG Video)
  mpeg4 (MPEG-4 Video)
  3g2 (Mobile Video)
  3gp (Mobile Video)
  3gpp (Mobile Video)
  asf (Windows Media Video)
  avi (AVI Video)

  To most of these :

  HTML5, Flash : MP4/H.264, High profile
  HTML5 : WebM
  HTML5 : Ogg
  Mobile : MP4/H.264, Baseline profile, 480x360, for wide compatibility
  Mobile : MP4/H.264, Main profile, 1280x720, for newer iOS devices (iPhone 4, iPad, Apple TV)
  Mobile : 3GP/MPEG4, 320x240 and/or 177x144, for non-smartphones*

  Nothing which would not work out of box in ffmpeg
  Some tweaking about processor usage and quality is ok but not so important.

  Goal is to get suitable clips for playing in chrome, firefox, ie9, iphone and android.
  For now iphone is the most important.

  IF you have some spare time, feel free to contact me, i would pay somebody just to send me "commands". It doesn’t to be anything "smart" just so that i don’t need to spend so much time trying learn all about ffmpeg.