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• How to use FFMPEG Binaries within an Android App built with Android Studio for Windows

  17 février 2016, par Valtinho

  I’ve read hundreds of pages on how to use ffmpeg in Android Studio all over the internet and none of them managed to give actual working solutions. I need to be able to trim a video selected from the gallery down to only the first 5 seconds. Ffmpeg is extremely user-unfriendly and I can’t even get it to compile successfully.

  The closest I got to compiling ffmpeg was running the app from uday-rayala called video-trimmer on github : https://github.com/uday-rayala/video-trimmer

  I downloaded the code, imported it into Eclipse and it runs and cuts videos once (it always crashes if you try a second time...). Anyway, I tried to replicate uday’s video-trimmer setup in my Android Studio app by moving the ffmpeg source files into a jni folder, and the armeabi folder inside a jniLibs folder, but the entire thing falls apart and doesn’t compile.

  Has anyone implemented ffmpeg source code within their apps ??? If so, could you please provide some working examples ? The internet is in desperate need of complete working examples for the extremely common task of video editing.

• Steps of using ffmpeg in visual studio 2019 ? [closed]

  15 avril 2020, par taimoor1990

  I have to use ffmpeg libraries which I am new to. Currently I am trying to build a basic hello world application that uses ffmpeg. I have googled multiple times there are some answers, saying something like static include these libraries and such comments which I am not sure how. I am looking for a step by step guide to link ffmpeg with a basic hello world app.

  


• ffmpeg concatenated file does not play as expected

  28 janvier 2018, par Trewq

  I am trying create a video by concatenating in this order :

  video1.mp4 & video_from_static_image.mp4 & video1.mp4

  video1.mp4 is a simple video file. video_from_static_image.mp4 was created from the a.png image like this :

  ffmpeg  -y -framerate 25 -f image2  -loop 1 -i a.png -c:v libx264 -profile:v main -pix_fmt yuv420p -t 2 -r 25  video_from_static_image.mp4

  I create the final concatenated file through this command :

  ffmpeg -y -f concat -safe 0 -i mylist.txt -c copy final_concat.mp4

  I get the following message during the concat process :

  [mp4 @ 0x7fee6b815e00] Non-monotonous DTS in output stream 0:0; previous: 120678, current: 65722; changing to 120679. This may result in incorrect timestamps in the output file.

  The complete output when running the above command is here

  When I play final_concat.mp4 it has problems with video_from_static_image.mp4 and it seems to skip it (and other variations resulted in playing for a short while). I’ve tried a bunch of things, but I believe they all point to the DTS error above.

  BTW, all the video files are pretty small (< 1MB). Here are details about the version I am using :

  $ ffmpeg -version
ffmpeg version 3.3.4 Copyright (c) 2000-2017 the FFmpeg developers
built with Apple LLVM version 7.3.0 (clang-703.0.31)
configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libmp3lame --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma --enable-vda
libavutil      55. 58.100 / 55. 58.100
libavcodec     57. 89.100 / 57. 89.100
libavformat    57. 71.100 / 57. 71.100
libavdevice    57.  6.100 / 57.  6.100
libavfilter     6. 82.100 /  6. 82.100
libavresample   3.  5.  0 /  3.  5.  0
libswscale      4.  6.100 /  4.  6.100
libswresample   2.  7.100 /  2.  7.100
libpostproc    54.  5.100 / 54.  5.100