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• How do unwrap fisheye and overlap fisheye lens with ffmpeg ? [closed]

  10 juillet 2023, par MrWm

  I am using an insta 360 x3 and would like to automate exporting videos without using their studio tools on Linux.

  


  Here's a screencap of a video format in the camera :

  


  Insta360 x3 camera screenshot

  


  ---

  


  I am using ffmpeg to unwrap the video feed with the following command : (taken from here)

  


  ffmpeg -y -i input.lrv -vf v360=dfisheye:e:yaw=-90 -c:v libx265 -b:v 40000k -bufsize 5000k -preset ultrafast -c:a copy -t 10 test.mkv


  


  The command works, and does a decent job, but one of the lens has a higher field of view with a fuzzy outline. This results in the following image :

  


  Image of Insta360 x3 camera screenshot after ffmpeg command

  


  ---

  


  Is there a way to change the ffmpeg command to either overlap both lenses by a couple pixels to remove the fuzz, or crop out the overlapping field of view ?

  


• ffmpeg with libopenh264 to get profile high422

  24 juillet 2023, par Андрей Тернити

  I have raw MJPEG video file. 3840x2160, 25fps, YUYV 4:2:2. I want use ffmpeg with encoder libopenh264. Why I can't use profile high422 ?

  


  ffmpeg -framerate 25 -i inFile.yuvj422p -profile:v high422 -c:v libopenh264 -q 2 -b 2500000 -allow_skip_frames 1 -maxrate 3500000 outFile.mkv


  


  Log

  


  ...
[libopenh264enc @ 0x56077580ed80] [Eval @ 0x7ffe78457230] Undefined constant or missing '(' in 'high422'


  


  Let's know encoder's capability

  


  # ffmpeg -h encoder=libopenh264&#xA;Encoder libopenh264 [OpenH264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10]:&#xA;    General capabilities: threads &#xA;    Threading capabilities: other&#xA;    Supported pixel formats: yuv420p&#xA;libopenh264enc AVOptions:&#xA;  -slice_mode        <int>        E..V......P set slice mode, use slices/max_nal_size (from 0 to 4) (default fixed)&#xA;     fixed           1            E..V....... a fixed number of slices&#xA;     dyn             3            E..V....... Size limited (compatibility name)&#xA;     sizelimited     3            E..V....... Size limited&#xA;  -loopfilter        <int>        E..V....... enable loop filter (from 0 to 1) (default 1)&#xA;  -profile           <int>        E..V....... set profile restrictions (from -99 to 65535) (default -99)&#xA;     constrained_baseline 578          E..V.......&#xA;     main            77           E..V.......&#xA;     high            100          E..V.......&#xA;  -max_nal_size      <int>        E..V....... set maximum NAL size in bytes (from 0 to INT_MAX) (default 0)&#xA;  -allow_skip_frames <boolean>    E..V....... allow skipping frames to hit the target bitrate (default false)&#xA;  -cabac             <int>        E..V......P Enable cabac(deprecated, use coder) (from 0 to 1) (default 0)&#xA;  -coder             <int>        E..V....... Coder type (from -1 to 1) (default default)&#xA;     default         -1           E..V.......&#xA;     cavlc           0            E..V.......&#xA;     cabac           1            E..V.......&#xA;     vlc             0            E..V.......&#xA;     ac              1            E..V.......&#xA;  -rc_mode           <int>        E..V....... Select rate control mode (from -1 to 3) (default quality)&#xA;     off             -1           E..V....... bit rate control off&#xA;     quality         0            E..V....... quality mode&#xA;     bitrate         1            E..V....... bitrate mode&#xA;     buffer          2            E..V....... using buffer status to adjust the video quality (no bitrate control)&#xA;     timestamp       3            E..V....... bit rate control based on timestamp&#xA;</int></int></int></boolean></int></int></int></int>

  


  Looks like there is no high422 profile in libopenh264. But I can find
PRO_HIGH422 in several places of source code...

  


  ffmpeg version

  


  # ffmpeg -v
ffmpeg version N-111611-g5b11ee9429 Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)
  configuration: --prefix=/home/a/Downloads/myGitHub/FFmpeg_fixing/ffmpeg_openh264/ffmpeg_build/ --pkg-config-flags=--static --extra-cflags=-I/home/a/Downloads/myGitHub/FFmpeg_fixing/ffmpeg_openh264/ffmpeg_build/include --extra-ldflags=-L/home/a/Downloads/myGitHub/FFmpeg_fixing/ffmpeg_openh264/ffmpeg_build/lib --extra-libs='-lpthread -lm' --ld=g++ --bindir=/home/a/bin --enable-gpl --enable-libopenh264


  


  Why I can't use profile high422 ?

  


• avcodec/jpegxl_parser : add some icc profile checks

  3 octobre 2023, par Leo Izen

  avcodec/jpegxl_parser : add some icc profile checks
  This patch will cause the parser to abort if it detects an icc profile
  
  with an invalid size. This is particularly important if the icc profile
  
  is entropy-encoded with zero bits per symbol, as it can prevent a
  
  seemingly infinite loop during parsing.
  Fixes : infinite loop
  
  Fixes : 62374/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer
  
      -5551878085410816
  Found-by : continuous fuzzing process
  
      https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
  
  Reported-by : Michael Niedermayer <michael@niedermayer.cc>
  
  Signed-off-by : Leo Izen <leo.izen@gmail.com>
  

  • [DH] libavcodec/jpegxl_parser.c