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• lavc/h263dsp : R-V V {h,v}_loop_filter

  19 mai 2024, par Rémi Denis-Courmont

  lavc/h263dsp : R-V V h,v_loop_filter
  Since the horizontal and vertical filters are identical except for a
  
  transposition, this uses a common subprocedure with an ad-hoc ABI.
  
  To preserve return-address stack prediction, a link register has to be
  
  used (c.f. the "Control Transfer Instructions" from the
  
  RISC-V ISA Manual). The alternate/temporary link register T0 is used
  
  here, so that the normal RA is preserved (something Arm cannot do !).
  To load the strength value based on `qscale`, the shortest possible
  
  and PIC-compatible sequence is used : AUIPC ; ADD ; LBU. The classic
  
  LLA ; ADD ; LBU sequence would add one more instruction since LLA is a
  
  convenience alias for AUIPC ; ADDI. To ensure that this trick works,
  
  relocation relaxation is disabled.
  To implement the two signed divisions by a power of two toward zero :
  
   (x / (1 << SHIFT))
  
  the code relies on the small range of integers involved, computing :
  
   (x + (x >> (16 - SHIFT))) >> SHIFT
  
  rather than the more general :
  
   (x + ((x >> (16 - 1)) & ((1 << SHIFT) - 1))) >> SHIFT
  
  Thus one ANDI instruction is avoided.
  T-Head C908 :
  
  h263dsp.h_loop_filter_c :       228.2
  
  h263dsp.h_loop_filter_rvv_i32 : 144.0
  
  h263dsp.v_loop_filter_c :       242.7
  
  h263dsp.v_loop_filter_rvv_i32 : 114.0
  
  (C is probably worse in real use due to less predictible branches.)
  

  • [DH] libavcodec/h263dsp.c
  • [DH] libavcodec/h263dsp.h
  • [DH] libavcodec/riscv/Makefile
  • [DH] libavcodec/riscv/h263dsp_init.c
  • [DH] libavcodec/riscv/h263dsp_rvv.S

• Setting fixed keyframes in a h265 video using FFMPEG

  10 octobre 2020, par TomerP

  I'm trying to cut a video and convert it into h265, but the output file isn't seekable in the same way as the original video (for example, instead of jumping to a keyframe every 1 second, the keyframes can be 15 seconds apart).

  


  I've been trying to force keyframes every 2 seconds using the following command, but it doesn't seem to work (the input's frame rate is 25 fps) :

  


  ffmpeg -i "D:\test\example.mp4" -ss 0 -t 60 -c:v libx265 -an -x265-params "crf=25:keyint=52:min-keyint=52:no-scenecut" "D:\test\example\example_0.mp4" -hwaccel cuda -hwaccel_output_format cuda


  


  What am I doing wrong here ?

  


  EDIT : Full run log :

  


  ffmpeg -i "D:\test\example.mp4" -ss 0 -t 60 -c:v libx265 -an -x265-params "crf=25:keyint=52:min-keyint=52:no-scenecut" "D:\test\example\example_0.mp4" -hwaccel cuda -hwaccel_output_format cuda 
ffmpeg version 4.2.3 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9.3.1 (GCC) 20200523
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Trailing options were found on the commandline.
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001dabdc30fc0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\test\example.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    track           : 1
    comment         : www.dvdvideosoft.com
    title           : Final Four Classic, 2004: Maccabi Elite Tel Aviv-Skipper Bologna
    encoder         : Lavf55.19.104
  Duration: 01:38:43.57, start: 0.000000, bitrate: 1076 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 854x480 [SAR 1:1 DAR 427:240], 944 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
    Stream #0:2: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 480x360, 90k tbr, 90k tbn, 90k tbc (attached pic)
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265))
Press [q] to stop, [?] for help
x265 [info]: HEVC encoder version 3.3+29-1e3dbf09ee4f
x265 [info]: build info [Windows][GCC 9.3.1][64 bit] 8bit+10bit
x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
x265 [info]: Main profile, Level-3 (Main tier)
x265 [info]: Thread pool created using 16 threads
x265 [info]: Slices                              : 1
x265 [info]: frame threads / pool features       : 4 / wpp(8 rows)
x265 [warning]: Source height < 720p; disabling lookahead-slices
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 [info]: ME / range / subpel / merge         : hex / 57 / 2 / 3
x265 [info]: Keyframe min / max / scenecut / bias  : 25 / 250 / 40 / 5.00 
x265 [info]: Lookahead / bframes / badapt        : 20 / 4 / 2
x265 [info]: b-pyramid / weightp / weightb       : 1 / 1 / 0
x265 [info]: References / ref-limit  cu / depth  : 3 / off / on
x265 [info]: AQ: mode / str / qg-size / cu-tree  : 2 / 1.0 / 32 / 1
x265 [info]: Rate Control / qCompress            : CRF-28.0 / 0.60
x265 [info]: tools: rd=3 psy-rd=2.00 early-skip rskip mode=1 signhide tmvp
x265 [info]: tools: b-intra strong-intra-smoothing deblock sao
Output #0, mp4, to 'D:\test\example\example_0.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    track           : 1
    comment         : www.dvdvideosoft.com
    title           : Final Four Classic, 2004: Maccabi Elite Tel Aviv-Skipper Bologna
    encoder         : Lavf58.29.100
    Stream #0:0(und): Video: hevc (libx265) (hev1 / 0x31766568), yuv420p, 854x480 [SAR 1:1 DAR 427:240], q=2-31, 25 fps, 12800 tbn, 25 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc58.54.100 libx265
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
frame= 1500 fps=116 q=-0.0 Lsize=    3811kB time=00:00:59.88 bitrate= 521.4kbits/s speed=4.62x    
video:3789kB audio:0kB subtitle:0kB other streams:0kB global headers:2kB muxing overhead: 0.581860%
x265 [info]: frame I:     10, Avg QP:26.67  kb/s: 3043.86 
x265 [info]: frame P:    395, Avg QP:28.57  kb/s: 1282.13 
x265 [info]: frame B:   1095, Avg QP:34.31  kb/s: 217.24  
x265 [info]: Weighted P-Frames: Y:3.8% UV:0.8%
x265 [info]: consecutive B-frames: 5.4% 5.4% 13.1% 65.4% 10.6% 

encoded 1500 frames in 12.93s (116.05 fps), 516.51 kb/s, Avg QP:32.75


  


• How do I specify the flutter-ffmpeg package in iOS Podfile ?

  26 août 2020, par Khoi Le

  Based on : this question,
I believe that they changed Podfiles such that this code (from a tutorial) :

  


  if name == 'flutter_ffmpeg'
  pod name+'/min-gpl-lts', :path => File.join(symlink, 'ios')
else
  pod name, :path => File.join(symlink, 'ios')


  


  and this code in the ffmpeg-flutter docs :
"Modify the default #Plugin Pods block as follows :"

  


  # Prepare symlinks folder. We use symlinks to avoid having Podfile.lock&#xA;  # referring to absolute paths on developers&#x27; machines.&#xA;  system(&#x27;rm -rf .symlinks&#x27;)&#xA;  system(&#x27;mkdir -p .symlinks/plugins&#x27;)&#xA;  plugin_pods = parse_KV_file(&#x27;../.flutter-plugins&#x27;)&#xA;  plugin_pods.each do |name, path|&#xA;    symlink = File.join(&#x27;.symlinks&#x27;, &#x27;plugins&#x27;, name)&#xA;    File.symlink(path, symlink)&#xA;    if name == &#x27;flutter_ffmpeg&#x27;&#xA;        pod name&#x2B;&#x27;/<package>&#x27;, :path => File.join(symlink, &#x27;ios&#x27;)&#xA;    else&#xA;        pod name, :path => File.join(symlink, &#x27;ios&#x27;)&#xA;    end&#xA;  end&#xA;</package>

  


  No longer work. This is what my current Podfile looks like. What do I add so that I can specify my flutter_ffmpeg as "/min-gpl-lts."

  


  # Uncomment this line to define a global platform for your project
platform :ios, '9.3'
pod 'Firebase/Auth'
pod 'Firebase/Firestore'
pod 'GoogleSignIn'
#pod 'flutter_ffmpeg/min-gpl-lts' # when i uncomment this line, it says "multiple sources for dependency"

# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
ENV['COCOAPODS_DISABLE_STATS'] = 'true'

project 'Runner', {
  'Debug' => :debug,
  'Profile' => :release,
  'Release' => :release,
}

def flutter_root
  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
  unless File.exist?(generated_xcode_build_settings_path)
    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
  end

  File.foreach(generated_xcode_build_settings_path) do |line|
    matches = line.match(/FLUTTER_ROOT\=(.*)/)
    return matches[1].strip if matches
  end
  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
end

require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)

flutter_ios_podfile_setup

target 'Runner' do
  use_frameworks!
  use_modular_headers!

  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
  end
end


  


  I have tried this Podfile with the suggestion of "forking" the function out :

  


  # Uncomment this line to define a global platform for your project
platform :ios, '9.3'
pod 'Firebase/Auth'
pod 'Firebase/Firestore'
pod 'GoogleSignIn'

# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
ENV['COCOAPODS_DISABLE_STATS'] = 'true'

project 'Runner', {
  'Debug' => :debug,
  'Profile' => :release,
  'Release' => :release,
}

def flutter_root
  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
  unless File.exist?(generated_xcode_build_settings_path)
    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
  end

  File.foreach(generated_xcode_build_settings_path) do |line|
    matches = line.match(/FLUTTER_ROOT\=(.*)/)
    return matches[1].strip if matches
  end
  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
end

require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)

flutter_ios_podfile_setup

# Create this "fork" of flutter_install_ios_plugin_pods
def install_plugin_pods(ios_application_path = nil)
  # defined_in_file is set by CocoaPods and is a Pathname to the Podfile.
   ios_application_path ||= File.dirname(defined_in_file.realpath) if self.respond_to?(:defined_in_file)
   raise 'Could not find iOS application path' unless ios_application_path
 
   # Prepare symlinks folder. We use symlinks to avoid having Podfile.lock
   # referring to absolute paths on developers' machines.
 
   symlink_dir = File.expand_path('.symlinks', ios_application_path)
   system('rm', '-rf', symlink_dir) # Avoid the complication of dependencies like FileUtils.
 
   symlink_plugins_dir = File.expand_path('plugins', symlink_dir)
   system('mkdir', '-p', symlink_plugins_dir)
 
   plugins_file = File.join(ios_application_path, '..', '.flutter-plugins')
   plugin_pods = flutter_parse_plugins_file(plugins_file)
   plugin_pods.each do |name, path|
     symlink = File.join(symlink_plugins_dir, name)
     File.symlink(path, symlink)
 
     # Changes relative to flutter_ffmpeg
     if name == 'flutter_ffmpeg'
         pod name+'/min-gpl-lts', :path => File.join('.symlinks', 'plugins', name, 'ios')
     else
         pod name, :path => File.join('.symlinks', 'plugins', name, 'ios')
     end
   end
 end

target 'Runner' do
  use_frameworks!
  use_modular_headers!

  # flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
  # this function ^ is specified as follows
  # def flutter_install_all_ios_pods(ios_application_path = nil)
  #   flutter_install_ios_engine_pod(ios_application_path)
  #   flutter_install_ios_plugin_pods(ios_application_path)
  # end

  # use this subcall to do the first half of the above^ function
  flutter_install_ios_engine_pod File.dirname(File.realpath(__FILE__))

  # use our "fork" to install the plug in pods (exactly the same as
  # the original function but with ffmpeg package specified)
  install_plugin_pods(File.realpath(__FILE__))
end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
  end
end


  


  But this gives me an error in Xcode's GeneratedPluginRegistrant.m : Module 'apple_sign_in'not found. So I think the Podfile is not working.

  


  I also tried this, where I pass File.dirname(File.realpath(__FILE__)) to the function install_plugin_pods :

  


  # Uncomment this line to define a global platform for your project
platform :ios, '9.3'
pod 'Firebase/Auth'
pod 'Firebase/Firestore'
pod 'GoogleSignIn'

# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
ENV['COCOAPODS_DISABLE_STATS'] = 'true'

project 'Runner', {
  'Debug' => :debug,
  'Profile' => :release,
  'Release' => :release,
}

def flutter_root
  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
  unless File.exist?(generated_xcode_build_settings_path)
    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
  end

  File.foreach(generated_xcode_build_settings_path) do |line|
    matches = line.match(/FLUTTER_ROOT\=(.*)/)
    return matches[1].strip if matches
  end
  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
end

require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)

flutter_ios_podfile_setup

# Create this "fork" of flutter_install_ios_plugin_pods
def install_plugin_pods(ios_application_path = nil)
  # defined_in_file is set by CocoaPods and is a Pathname to the Podfile.
   ios_application_path ||= File.dirname(defined_in_file.realpath) if self.respond_to?(:defined_in_file)
   raise 'Could not find iOS application path' unless ios_application_path
 
   # Prepare symlinks folder. We use symlinks to avoid having Podfile.lock
   # referring to absolute paths on developers' machines.
 
   symlink_dir = File.expand_path('.symlinks', ios_application_path)
   system('rm', '-rf', symlink_dir) # Avoid the complication of dependencies like FileUtils.
 
   symlink_plugins_dir = File.expand_path('plugins', symlink_dir)
   system('mkdir', '-p', symlink_plugins_dir)
 
   plugins_file = File.join(ios_application_path, '..', '.flutter-plugins')
   plugin_pods = flutter_parse_plugins_file(plugins_file)
   plugin_pods.each do |name, path|
     symlink = File.join(symlink_plugins_dir, name)
     File.symlink(path, symlink)
 
     # Changes relative to flutter_ffmpeg
     if name == 'flutter_ffmpeg'
         pod name+'/min-gpl-lts', :path => File.join('.symlinks', 'plugins', name, 'ios')
     else
         pod name, :path => File.join('.symlinks', 'plugins', name, 'ios')
     end
   end
 end

target 'Runner' do
  use_frameworks!
  use_modular_headers!

  # flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
  # this function ^ is specified as follows
  # def flutter_install_all_ios_pods(ios_application_path = nil)
  #   flutter_install_ios_engine_pod(ios_application_path)
  #   flutter_install_ios_plugin_pods(ios_application_path)
  # end

  # use this subcall to do the first half of the above^ function
  flutter_install_ios_engine_pod File.dirname(File.realpath(__FILE__))

  # use our "fork" to install the plug in pods (exactly the same as
  # the original function but with ffmpeg package specified)
  install_plugin_pods File.dirname(File.realpath(__FILE__))
end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
  end
end


  


  However, this gives me a Error running pod install. I run flutter clean between builds.