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• FFMPEG giving error on compiling on Windows

  1er août 2014, par user2384410

  Hi I am trying to build FFMPEG following :http://www.roman10.net/how-to-build-ffmpeg-with-ndk-r9/
  I have set up all the things including changes in configure file and preparing build_android.sh but when I am trying to compile this using cygwin on my Windows machine,I get following error :-

  d :/android-ndk/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/windows-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.8/../../../../arm-linux-androideabi/bin/ld.exe : error : libavutil/libavutil.so:1:1 : syntax error, unexpected ’ !’, expecting $end

  I am using NDK-r10 and Windows-7(64-bit).

• FFMPEG on Windows faststart command line with or without a +

  24 juillet 2014, par C0nw0nk

  So on the following wiki page i see ffmpeg tells us when using faststart for HTML5 compatibility we should use a + symbol.

  https://trac.ffmpeg.org/wiki/Encode/H.264#faststartforwebvideo

  -movflags +faststart

  But looking at command line examples on here and other sites everyone puts it in their command line like this.

  ffmpeg -i C:\vidtests\Wildlife.mp4 -movflags faststart C:\vidtests\Wildlife_fs.mp4

  So my question is should it matter if the + symbol is there or not ?

• FFmpeg development on Eclipse on Windows

  10 juillet 2013, par Juan Ayala

  The first thing I did was to refer to tutorial on FFmpeg site.

  I set up MSYS+MinGW64, I cloned all the relevant pre-requisites (i.e OpenSSL, x264, rtmpdump),
  I successfully cross-compiled them all. I ran the configure for FFmpeg, and I was able to cross-compile that as well. And my statically linked ffmpeg.exe works to my satisfaction.

  In Eclipse I was able to create a project, load up the source code, navigate it, make some changes, even compile and step-through debug. The problem I am having is with the Eclipse design-time error, and I think this is more of an Eclipse/C++ thing than FFmpeg.

  For example in ffmpeg.c I find this error "Field 'bitstream_filters' could not be resolved" at this line :

  AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;

  that output_streams is of type

  OutputStream **output_streams

  and when I try to open the declaration for OutputStream Eclipse gives me the option of two locations. Obviously Eclipse is not sure which of these declarations it is, hence the "could not be resolved" error. OutputStream is defined in the following 2 files

  • ffmpeg.h
  • libavformat/smoothstreamingenc.c

  (hmm nice to know FFmpeg can do smooth streaming...) but anyway the correct definition would of been the one in ffmpeg.h.

  So... the whole goal of getting the source into an IDE was so that I could enjoy the benefits of such things like intelisense. What can I do in Eclipse to set some sort of order or rule as to how it should resolve types in cases where the names clash like this ?