Same ffmpeg command is running slower on my android project than on ffmpeg-kit-android-test project

[daniela-mateescu]

I have modified the ffmpeg-kit-android-test project to execute a more simple command, when pressing the encode button:
-loop 1 -i /data/user/0/com.arthenica.ffmpegkit.test/cache/input.jpg -c:v mpeg4 -t 5 -pix_fmt yuv420p -vf "scale=1280:720" -r 30 /storage/emulated/0/DCIM/video.mp4

I am executing the same command from another project:
-loop 1 -i /data/user/0/com.example.mytestapplication/cache/input.jpg -c:v mpeg4 -t 5 -pix_fmt yuv420p -vf "scale=1280:720" -r 30 /storage/emulated/0/DCIM/scenario.mp4

I am using the same image from the disk by copying it to the images from cache.

The problem is that im my app the processing is taking longer than in the official ffmpeg test app(about 30 seconds compared to 10 seconds )

The logs from the test app looks like this:

And the logs from my app:

I am using the same version of the library.
I checked to see if the code looks similar for both and it does.

Can somebody help with this problem please?

[tanersener]

It is hard to say why that happens without seeing full console outputs. If you can share those then can compare them and identify the difference.

[daniela-mateescu]

Hello!
Thank you for your reply.

I have been trying to reproduce this in order to obtain the logs, but it seems that I can not reproduce this anymore: both in my app and in the ffmpeg-kit-android-test app executing the command:
-loop 1 -i /data/user/0/com.arthenica.ffmpegkit.test/cache/input.jpg -c:v mpeg4 -t 5 -pix_fmt yuv420p -vf "scale=1280:720" -r 30 /storage/emulated/0/DCIM/video.mp4
It takes above 13 seconds.

I run it with an image taken with the phone camera:

Is there any way to increase this performance?
We only want to use ffmpeg kit to convert an image into a small video (that we will use further by concatenating to other videos, but using another library for the concatenation)

The complete log for the above command is:

2024-10-29 12:39:12.249 11551-11551 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  Testing VIDEO encoding with 'mpeg4' codec
2024-10-29 12:39:12.543 11551-11551 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  FFmpeg process started with arguments: '/data/user/0/com.arthenica.ffmpegkit.test/cache/machupicchu.jpg'.
2024-10-29 12:39:12.574 11551-11551 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  FFmpeg process started with arguments: '-loop 1 -i /data/user/0/com.arthenica.ffmpegkit.test/cache/machupicchu.jpg -c:v mpeg4 -t 5 -pix_fmt yuv420p -vf "scale=1280:720" -r 30 /storage/emulated/0/DCIM/current11.mp4'.
2024-10-29 12:39:12.577 11551-11551 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  Async FFmpeg process started with sessionId 1.
2024-10-29 12:39:12.585 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  ffmpeg started on 2024-10-29 at 12:39:12
                                                                                                    Report written to "/data/user/0/com.arthenica.ffmpegkit.test/cache/ffreport.txt"
                                                                                                    Log level: 48
2024-10-29 12:39:12.586 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  ffmpeg version n6.0
2024-10-29 12:39:12.586 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D   Copyright (c) 2000-2023 the FFmpeg developers
2024-10-29 12:39:12.586 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  
2024-10-29 12:39:12.586 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D    built with Android (7155654, based on r399163b1) clang version 11.0.5 (https://android.googlesource.com/toolchain/llvm-project 87f1315dfbea7c137aa2e6d362dbb457e388158d)
2024-10-29 12:39:12.587 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D    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 --enable-pic --enable-jni --enable-optimizations --enable-swscale --disable-static --enable-shared --enable-pthreads --enable-v4l2-m2m --disable-outdev=fbdev --disable-indev=fbdev --enable-small --disable-xmm-clobber-test --disable-debug --enable-lto --disable-neon-clobber-test --disable-programs --disable-postproc --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages --disable-sndio --disable-schannel --disable-securetransport --disable-xlib --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --disable-videotoolbox --disable-audiotoolbox --disable-appkit --disable-alsa --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gmp --enable-gnutls --enable-libmp3lame --enable-libass --enable-iconv --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libopencore-amrnb --enable-libshine --enable-libspeex --enable-libdav1d --enable-libkvazaar --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-libzimg --disable-openssl --enable-zlib --enable-mediacodec
2024-10-29 12:39:12.587 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D    libavutil      58.  2.100 / 58.  2.100
2024-10-29 12:39:12.587 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D    libavcodec     60.  3.100 / 60.  3.100
2024-10-29 12:39:12.587 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D    libavformat    60.  3.100 / 60.  3.100
2024-10-29 12:39:12.587 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D    libavdevice    60.  1.100 / 60.  1.100
2024-10-29 12:39:12.587 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D    libavfilter     9.  3.100 /  9.  3.100
2024-10-29 12:39:12.588 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D    libswscale      7.  1.100 /  7.  1.100
2024-10-29 12:39:12.589 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D    libswresample   4. 10.100 /  4. 10.100
2024-10-29 12:39:12.600 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  Input #0, image2, from '/data/user/0/com.arthenica.ffmpegkit.test/cache/machupicchu.jpg':
2024-10-29 12:39:12.600 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D    Duration: 
2024-10-29 12:39:12.600 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  00:00:00.04
2024-10-29 12:39:12.600 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  , start: 
2024-10-29 12:39:12.601 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  0.000000
2024-10-29 12:39:12.601 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  , bitrate: 
2024-10-29 12:39:12.601 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  133350 kb/s
2024-10-29 12:39:12.601 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  
2024-10-29 12:39:12.601 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D    Stream #0:0
2024-10-29 12:39:12.601 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  : Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 3024x4032 [SAR 1:1 DAR 3:4]
2024-10-29 12:39:12.601 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  , 
2024-10-29 12:39:12.601 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  25 fps, 
2024-10-29 12:39:12.601 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  25 tbr, 
2024-10-29 12:39:12.601 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  25 tbn
2024-10-29 12:39:12.601 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  
2024-10-29 12:39:12.671 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  Stream mapping:
2024-10-29 12:39:12.671 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D    Stream #0:0 -> #0:0
2024-10-29 12:39:12.671 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D   (mjpeg (native) -> mpeg4 (native))
2024-10-29 12:39:12.671 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  
2024-10-29 12:39:12.672 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  Press [q] to stop, [?] for help
2024-10-29 12:39:12.740 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  [swscaler @ 0xb40000721834e880] deprecated pixel format used, make sure you did set range correctly
2024-10-29 12:39:12.778 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  [swscaler @ 0xb400007218614c80] deprecated pixel format used, make sure you did set range correctly
2024-10-29 12:39:12.800 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  [swscaler @ 0xb40000721835d0c0] deprecated pixel format used, make sure you did set range correctly
2024-10-29 12:39:12.817 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  [swscaler @ 0xb4000072186142c0] deprecated pixel format used, make sure you did set range correctly
2024-10-29 12:39:12.894 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  Output #0, mp4, to '/storage/emulated/0/DCIM/current11.mp4':
2024-10-29 12:39:12.894 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D    Metadata:
2024-10-29 12:39:12.894 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D      encoder         : 
2024-10-29 12:39:12.894 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  Lavf60.3.100
2024-10-29 12:39:12.895 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  
2024-10-29 12:39:12.895 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D    Stream #0:0
2024-10-29 12:39:12.895 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  : Video: mpeg4 (mp4v / 0x7634706D), yuv420p(tv, bt470bg/unknown/unknown, progressive), 1280x720 [SAR 27:64 DAR 3:4], q=2-31, 200 kb/s
2024-10-29 12:39:12.895 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  , 
2024-10-29 12:39:12.895 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  30 fps, 
2024-10-29 12:39:12.895 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  15360 tbn
2024-10-29 12:39:12.895 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  
2024-10-29 12:39:12.895 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D      Metadata:
2024-10-29 12:39:12.895 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D        encoder         : 
2024-10-29 12:39:12.895 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  Lavc60.3.100 mpeg4
2024-10-29 12:39:12.895 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  
2024-10-29 12:39:12.895 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D      Side data:
2024-10-29 12:39:12.896 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D        
2024-10-29 12:39:12.896 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  cpb: 
2024-10-29 12:39:12.896 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  bitrate max/min/avg: 0/0/200000 buffer size: 0 
2024-10-29 12:39:12.896 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  vbv_delay: N/A
2024-10-29 12:39:12.896 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  
2024-10-29 12:39:12.960 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=    0 fps=0.0 q=6.1 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
2024-10-29 12:39:13.307 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=    6 fps=0.0 q=2.5 size=       0kB time=00:00:00.16 bitrate=   2.1kbits/s dup=1 drop=0 speed=0.302x    
2024-10-29 12:39:13.861 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=   12 fps= 11 q=1.6 size=       0kB time=00:00:00.40 bitrate=   0.9kbits/s dup=2 drop=0 speed=0.368x    
2024-10-29 12:39:14.464 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=   18 fps= 11 q=2.5 size=       0kB time=00:00:00.60 bitrate=   0.6kbits/s dup=3 drop=0 speed=0.369x    
2024-10-29 12:39:14.908 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=   23 fps= 11 q=2.1 size=       0kB time=00:00:00.76 bitrate=   0.5kbits/s dup=4 drop=0 speed=0.358x    
2024-10-29 12:39:15.389 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=   30 fps= 11 q=5.9 size=     256kB time=00:00:01.00 bitrate=2097.5kbits/s dup=5 drop=0 speed=0.377x    
2024-10-29 12:39:15.948 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=   38 fps= 12 q=10.0 size=     256kB time=00:00:01.26 bitrate=1655.9kbits/s dup=6 drop=0 speed=0.395x    
2024-10-29 12:39:16.455 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=   47 fps= 13 q=15.1 size=     256kB time=00:00:01.56 bitrate=1338.8kbits/s dup=8 drop=0 speed=0.422x    
2024-10-29 12:39:17.053 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=   54 fps= 13 q=26.9 size=     256kB time=00:00:01.80 bitrate=1165.3kbits/s dup=9 drop=0 speed=0.42x    
2024-10-29 12:39:17.687 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=   61 fps= 12 q=31.0 size=     256kB time=00:00:02.03 bitrate=1031.6kbits/s dup=10 drop=0 speed=0.414x    
2024-10-29 12:39:18.179 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=   67 fps= 12 q=31.0 size=     256kB time=00:00:02.23 bitrate= 939.2kbits/s dup=11 drop=0 speed=0.411x    
2024-10-29 12:39:18.746 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=   74 fps= 12 q=31.0 size=     256kB time=00:00:02.46 bitrate= 850.3kbits/s dup=12 drop=0 speed=0.413x    
2024-10-29 12:39:19.298 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=   80 fps= 12 q=31.0 size=     256kB time=00:00:02.66 bitrate= 786.6kbits/s dup=13 drop=0 speed=0.41x    
2024-10-29 12:39:19.809 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=   86 fps= 12 q=31.0 size=     256kB time=00:00:02.86 bitrate= 731.7kbits/s dup=14 drop=0 speed=0.407x    
2024-10-29 12:39:20.402 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=   92 fps= 12 q=31.0 size=     256kB time=00:00:03.06 bitrate= 684.0kbits/s dup=15 drop=0 speed=0.403x    
2024-10-29 12:39:20.881 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=   98 fps= 12 q=31.0 size=     256kB time=00:00:03.26 bitrate= 642.1kbits/s dup=16 drop=0 speed=0.402x    
2024-10-29 12:39:21.420 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=  104 fps= 12 q=31.0 size=     256kB time=00:00:03.46 bitrate= 605.0kbits/s dup=17 drop=0 speed=0.401x    
2024-10-29 12:39:21.945 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=  112 fps= 12 q=31.0 size=     256kB time=00:00:03.73 bitrate= 561.8kbits/s dup=19 drop=0 speed=0.407x    
2024-10-29 12:39:22.522 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=  118 fps= 12 q=31.0 size=     256kB time=00:00:03.93 bitrate= 533.3kbits/s dup=20 drop=0 speed=0.403x    
2024-10-29 12:39:23.104 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=  124 fps= 12 q=31.0 size=     512kB time=00:00:04.13 bitrate=1014.8kbits/s dup=21 drop=0 speed=0.401x    
2024-10-29 12:39:23.582 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=  128 fps= 12 q=31.0 size=     512kB time=00:00:04.26 bitrate= 983.1kbits/s dup=21 drop=0 speed=0.395x    
2024-10-29 12:39:24.177 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=  134 fps= 12 q=31.0 size=     512kB time=00:00:04.46 bitrate= 939.1kbits/s dup=22 drop=0 speed=0.392x    
2024-10-29 12:39:24.672 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=  141 fps= 12 q=31.0 size=     512kB time=00:00:04.66 bitrate= 898.9kbits/s dup=23 drop=0 speed=0.392x    
2024-10-29 12:39:25.271 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=  146 fps= 12 q=31.0 size=     512kB time=00:00:04.86 bitrate= 861.9kbits/s dup=24 drop=0 speed=0.39x    
2024-10-29 12:39:25.583 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  frame=  150 fps= 12 q=31.0 Lsize=     582kB time=00:00:04.96 bitrate= 959.8kbits/s dup=25 drop=0 speed=0.385x    
2024-10-29 12:39:25.583 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  video:580kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 
2024-10-29 12:39:25.583 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  0.259968%
2024-10-29 12:39:25.583 11551-11581 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  
2024-10-29 12:39:25.637 11551-11551 ffmpeg-kit-test         com.arthenica.ffmpegkit.test         D  Encode completed successfully in 13007 milliseconds; playing video.

[tanersener]

FFmpeg offers a range of encoders, each with varying speeds. Some are faster, while others may be slower but more efficient. I recommend experimenting with other encoders to optimize the speed. The output you shared shows you're currently using the native MPEG-4 encoder. Trying H.264 encoders, such as x264, could potentially improve your encoding speed.