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• How can I increase the performance of this video watermarking call which seems to be only using 6% of my system's CPU ? Currently using ffmpeg

  24 août 2023, par Codemonkey

  I have a php script to add a watermark to an uploaded video, using ffmpeg

  


  shell_exec("ffmpeg -y -i input.mp4 -i watermark.png -filter_complex $filter output.mp4")


  


  The video is 36 seconds long, 33MB and 1080x1920, 24fps. The output video comes in at 8MB, scaled down to 540x960 with a PNG overlaid as a watermark.

  


  The script takes about 3 seconds, averaging 320fps or so. For a one-off this would be ok, but I'm going to be processing hundreds/thousands of these at a time.

  


  I have 128GB of ram and an EPYC 7502p (32cores/64threads), and both input and output files are on NVMe drives.

  


  If I monitor top showing all my cores/threads in another window, with refresh delay set to a variety of things from 0.1 to 2 seconds, I'd guesstimate that this hits about 1/4 of my available threads, at about 25% utilisation each.

  


  So it kind of feels like I COULD see a 16x speed increase if it hit all of them at 100%. That actually wouldn't be ideal, locking up the server of course, but when my CPU is sat at 99% idle 99% of the time, I feel it could do better - it'd be nice to see it hitting at least half the cores or utilising at least 50% of them when it does...

  


  So, is there anything I can change with ffmpeg's config/build or the way I call it ? If this is as good as ffmpeg can do, are there better tools for the job ?

  


  Thank you

  


  ---

  


  EDIT :

  


  A few things I've learnt since posting :

  


  

  • -c:v libx264 -preset ultrafast - marginal help

  


  • nice -n -10 - marginal help (changing to -20 is makes negligible difference)

  


  • -c:a copy - significant help, which I found surprising

  


  


  FPS up from 320 to 540 using those 3 combined. I still feel there should be significantly more gains somewhere though...

  


  ---

  


  Here's the output from the original script, if it helps :

  


  ffmpeg version 4.2.9 Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 8 (GCC)
  configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --docdir=/usr/share/doc/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection' --extra-ldflags='-Wl,-z,relro -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld ' --extra-cflags=' ' --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-version3 --enable-bzlib --disable-crystalhd --enable-fontconfig --enable-frei0r --enable-gcrypt --enable-gnutls --enable-ladspa --enable-libaom --enable-libdav1d --enable-libass --enable-libbluray --enable-libcdio --enable-libdrm --enable-libjack --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libmp3lame --enable-nvenc --enable-openal --enable-opencl --enable-opengl --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librsvg --enable-libsrt --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-version3 --enable-vapoursynth --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --enable-libzvbi --enable-avfilter --enable-avresample --enable-libmodplug --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-libmfx --enable-runtime-cpudetect
  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
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  Metadata:
    major_brand     : M4V
    minor_version   : 1
    compatible_brands: isomavc1mp42
    creation_time   : 2023-07-03T14:55:37.000000Z
  Duration: 00:00:36.50, start: 0.000000, bitrate: 7315 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709/bt709/unknown), 1080x1920 [SAR 1:1 DAR 9:16], 7213 kb/s, 24 fps, 24 tbr, 24k tbn, 48 tbc (default)
    Metadata:
      creation_time   : 2023-07-03T14:55:37.000000Z
      handler_name    : ETI ISO Video Media Handler
      encoder         : Elemental H.264
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 96 kb/s (default)
    Metadata:
      creation_time   : 2023-07-03T14:55:37.000000Z
      handler_name    : ETI ISO Audio Media Handler
Input #1, png_pipe, from 'watermark.png':
  Duration: N/A, bitrate: N/A
    Stream #1:0: Video: png, rgba(pc), 1232x804 [SAR 11811:11811 DAR 308:201], 25 tbr, 25 tbn, 25 tbc
Stream mapping:
  Stream #0:0 (h264) -> scale (graph 0)
  Stream #1:0 (png) -> scale (graph 0)
  overlay (graph 0) -> Stream #0:0 (libx264)
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x56510d488e00] using SAR=1/1
[libx264 @ 0x56510d488e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x56510d488e00] profile High, level 3.1, 4:2:0, 8-bit
[libx264 @ 0x56510d488e00] 264 - core 157 r2980 34c06d1 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=30 lookahead_threads=5 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=24 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output.mp4':
  Metadata:
    major_brand     : M4V
    minor_version   : 1
    compatible_brands: isomavc1mp42
    encoder         : Lavf58.29.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 540x960 [SAR 1:1 DAR 9:16], q=-1--1, 24 fps, 12288 tbn, 24 tbc (default)
    Metadata:
      encoder         : Lavc58.54.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      creation_time   : 2023-07-03T14:55:37.000000Z
      handler_name    : ETI ISO Audio Media Handler
      encoder         : Lavc58.54.100 aac
frame=  876 fps=324 q=-1.0 Lsize=    7768kB time=00:00:36.45 bitrate=1745.5kbits/s speed=13.5x
video:7177kB audio:566kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.336181%
[libx264 @ 0x56510d488e00] frame I:9     Avg QP:21.46  size: 37765
[libx264 @ 0x56510d488e00] frame P:237   Avg QP:23.78  size: 17862
[libx264 @ 0x56510d488e00] frame B:630   Avg QP:28.03  size:  4405
[libx264 @ 0x56510d488e00] consecutive B-frames:  2.9%  2.5%  3.8% 90.9%
[libx264 @ 0x56510d488e00] mb I  I16..4: 13.6% 65.9% 20.5%
[libx264 @ 0x56510d488e00] mb P  I16..4:  5.2% 16.6%  4.1%  P16..4: 32.8% 18.0% 12.5%  0.0%  0.0%    skip:10.8%
[libx264 @ 0x56510d488e00] mb B  I16..4:  1.1%  2.7%  0.2%  B16..8: 35.3%  7.2%  2.5%  direct: 3.3%  skip:47.7%  L0:37.0% L1:52.2% BI:10.8%
[libx264 @ 0x56510d488e00] 8x8 transform intra:65.0% inter:71.5%
[libx264 @ 0x56510d488e00] coded y,uvDC,uvAC intra: 54.7% 62.1% 11.5% inter: 17.9% 12.9% 0.5%
[libx264 @ 0x56510d488e00] i16 v,h,dc,p: 16% 28%  8% 47%
[libx264 @ 0x56510d488e00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 23% 18%  6%  6%  7%  7%  7%  7%
[libx264 @ 0x56510d488e00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 16% 11%  7%  9% 10%  8%  8%  8%
[libx264 @ 0x56510d488e00] i8c dc,h,v,p: 55% 20% 20%  5%
[libx264 @ 0x56510d488e00] Weighted P-Frames: Y:5.5% UV:3.4%
[libx264 @ 0x56510d488e00] ref P L0: 65.0% 18.8% 13.0%  3.0%  0.2%
[libx264 @ 0x56510d488e00] ref B L0: 95.0%  4.0%  1.1%
[libx264 @ 0x56510d488e00] ref B L1: 98.2%  1.8%
[libx264 @ 0x56510d488e00] kb/s:1610.57
[aac @ 0x56510d4865c0] Qavg: 22331.562


  


• File conversion to mp3 returning failure everytime using flutter package ffmpeg_kit_flutter

  6 novembre 2024, par Sanath balthar

  I am trying to convert a .wav audio file generated from a flutter's text to speech package - "flutter_tts" to mp3 file but it is failing everytime.
I have written the below code for file conversion. I have imported the package ffmpeg_kit_flutter. It doesnt even show why the conversion is failing.
I have looked up in stackoverflow and other sites but could not find any relevant solutions. I am using vscode as editor. I have attached flutter doctor output below as well. Could anyone please guide me ? Let me know if you need more information.

  


  List<string> command = [&#xA;              &#x27;-i&#x27;, &#x27;$filePath/998tts.wav&#x27;,&#xA;              &#x27;-c:a&#x27;, &#x27;mp3&#x27;,&#xA;              &#x27;$filePath/998.mp3&#x27;&#xA;            ];&#xA;&#xA; await FFmpegKitConfig.enableLogs();&#xA;            FFmpegKitConfig.enableLogCallback((log) =>print(&#x27;FFmpeg log: $log&#x27;));        &#xA;          FFmpegSession result = await FFmpegKit.executeWithArguments(command);&#xA;          dynamic resultcode = await result.getReturnCode();&#xA;          dynamic resultlogs = await result.getLogsAsString();&#xA;          // FFmpegKitConfig.setLogLevel(logLevel)&#xA;          if(ReturnCode.isSuccess(resultcode)){&#xA;          print("file saved after conversion at $filePath/998.mp3 and result : Success and logs : $resultlogs");&#xA;          }&#xA;          else{&#xA;            print("Result : failure and logs : $resultlogs");&#xA;          }&#xA;&#xA;Flutter doctor output:&#xA;[√] Flutter (Channel stable, 3.19.6, on Microsoft Windows [Version 10.0.22631.3296], locale en-IN)&#xA;[√] Windows Version (Installed version of Windows is version 10 or higher)&#xA;[√] Android toolchain - develop for Android devices (Android SDK version 34.0.0)&#xA;[√] Chrome - develop for the web&#xA;[!] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.9.5)&#xA;X Visual Studio is missing necessary components. Please re-run the Visual Studio installer for the "Desktop development with C&#x2B;&#x2B;"&#xA;workload, and include these components:&#xA;MSVC v142 - VS 2019 C&#x2B;&#x2B; x64/x86 build tools&#xA;- If there are multiple build tool versions available, install the latest&#xA;C&#x2B;&#x2B; CMake tools for Windows&#xA;Windows 10 SDK&#xA;[√] Android Studio (version 2023.2)&#xA;[√] VS Code (version 1.89.0)&#xA;[√] Connected device (3 available)&#xA;[√] Network resources&#xA;&#xA;! Doctor found issues in 1 category.&#xA;&#xA;</string>

  


  Edit : Attaching error logs :

  


  I/flutter (25865): Loading ffmpeg-kit-flutter.
D/ffmpeg-kit-flutter(25865): FFmpegKitFlutterPlugin com.arthenica.ffmpegkit.flutter.FFmpegKitFlutterPlugin@a5d9788 started listening to events on io.flutter.plugin.common.EventChannel$IncomingStreamRequestHandler$EventSinkImplementation@4cfb5f2.
I/flutter (25865): Loaded ffmpeg-kit-flutter-android-audio-arm64-v8a-6.0.3.
I/flutter (25865): Result : failure and logs : ffmpeg version n6.0 Copyright (c) 2000-2023 the FFmpeg developers
I/flutter (25865):   built with Android (7155654, based on r399163b1) clang version 11.0.5 (https://android.googlesource.com/toolchain/llvm-project 87f1315dfbea7c137aa2e6d362dbb457e388158d)

I/flutter (25865):   configuration: --cross-prefix=aarch64-linux-android- --sysroot=/Users/sue/Library/Android/sdk/ndk/22.1.7171670/toolchains/llvm/prebuilt/darwin-x86_64/sysroot --prefix=/Users/sue/Projects/arthenica/ffmpeg-kit/prebuilt/android-arm64/ffmpeg --pkg-config=/opt/homebrew/bin/pkg-config --enable-version3 --arch=aarch64 --cpu=armv8-a --target-os=android --enable-neon --enable-asm --enable-inline-asm --ar=aarch64-linux-android-ar --cc=aarch64-linux-android24-clang --cxx=aarch64-linux-android24-clang++ --ranlib=aarch64-linux-android-ranlib --strip=aarch64-linux-android-strip --nm=aarch64-linux-android-nm --extra-libs='-L/Users/sue/Projects/arthenica/ffmpeg-kit/prebuilt/android-arm64/cpu-features/lib -lndk_compat' --disable-autodetect --enable-cross-compile 


  


• avformat/ffrtmpcrypt : Fix int-conversion warning

  22 décembre 2023, par Frank Plowman

  avformat/ffrtmpcrypt : Fix int-conversion warning
  The gcrypt definition of `bn_new` used to use the return statement
  
  on errors, with an AVERROR return value, regardless of the signature
  
  of the function where the macro is used - it is called in
  
  `dh_generate_key` and `ff_dh_init` which return pointers. As a result,
  
  compiling with gcrypt and the ffrtmpcrypt protocol resulted in an
  
  int-conversion warning. GCC 14 may upgrade these to errors [1].
  This patch fixes the problem by changing the macro to remove `AVERROR`
  
  and instead set `bn` to null if the allocation fails. This is the
  
  behaviour of all the other `bn_new` implementations and so the result is
  
  already checked at all the callsites. AFAICT, this should be the only
  
  change needed to get ffmpeg off Fedora's naughty list of projects with
  
  warnings which may be upgraded to errors in GCC 14 [2].
  [1] : https://gcc.gnu.org/pipermail/gcc/2023-May/241264.html
  
  [2] : https://www.mail-archive.com/devel@lists.fedoraproject.org/msg196024.html
  Signed-off-by : Frank Plowman <post@frankplowman.com>
  
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavformat/rtmpdh.c