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• Why can't FFmpeg code compile on different ARM 64 bit platforms？

  2 septembre 2021, par yanzhang.guo

  The same code (test_ffmpeg.c), I have compiled it on the x86_64 platform successfully, and there is no problem. I can successfully push the video to the RTMP server. However, if I switch to the ARM 64-bit platform, there is a problem with the compilation. Why ?

  


  


  1. Cross compile x264

     


     ./configure --enable-shared --disable-asm


     


     Edit config.mak

     


     SRCPATH=.
prefix=/usr/local
exec_prefix=${prefix}
bindir=${exec_prefix}/bin
libdir=${exec_prefix}/lib
includedir=${prefix}/include
SYS_ARCH=aarch64
SYS=LINUX
CC=aarch64-linux-gnu-gcc
CFLAGS=-Wno-maybe-uninitialized -Wshadow -O3 -ffast-math   -Wall -I. -I$(SRCPATH) -std=gnu99 -
D_GNU_SOURCE  -fPIC -fomit-frame-pointer -fno-tree-vectorize
COMPILER=GNU
COMPILER_STYLE=GNU
DEPMM=-MM -g0
DEPMT=-MT
LD=aarch64-linux-gnu-gcc -o
LDFLAGS=  -lm -lpthread -ldl
LIBX264=libx264.a
AR=aarch64-linux-gnu-gcc-ar rc
RANLIB=aarch64-linux-gnu-gcc-ranlib
STRIP=strip
INSTALL=install
AS=
ASFLAGS= -I. -I$(SRCPATH)  -f elf64 -DSTACK_ALIGNMENT=64
-DPIC
RC=
RCFLAGS=
EXE=
HAVE_GETOPT_LONG=1
DEVNULL=/dev/null
PROF_GEN_CC=-fprofile-generate
PROF_GEN_LD=-fprofile-generate
PROF_USE_CC=-fprofile-use
PROF_USE_LD=-fprofile-use
HAVE_OPENCL=yes
CC_O=-o $@
default: cli
install: install-cli
SOSUFFIX=so
SONAME=libx264.so.157
SOFLAGS=-shared -Wl,-soname,$(SONAME)  -Wl,-Bsymbolic
default: lib-shared
install: install-lib-shared
LDFLAGSCLI = -ldl
CLI_LIBX264 = $(LIBX264)


     


     then,

     


     make && make install


     


  


  2. Cross compile FFmpeg

     


     ./configure --arch=aarch64 --enable-cross-compile --target-os=linux --cc=aarch64-linux-gnu-gcc --
 cross-prefix=aarch64-linux-gnu- --prefix=./ffmpeg_result  --enable-shared --disable-static --
 disable-doc  --enable-gpl --enable-libx264 --extra-ldflags=-L/usr/local/lib/ --extra-libs=-ldl -
 -extra-cflags=-I/usr/local/include


     


     Add output of ffmpeg configure :output.

     


     then,

     


     make && make install


     


  


  3. Cross compile file test_ffmpeg.c

     


     aarch64-linux-gnu-gcc test_ffmpeg.c  -lavcodec -lavdevice -lavfilter -lavformat -lavutil -L
/data/ffmpeg-4.3/ffmpeg_result/lib -I /data/ffmpeg-4.3/ffmpeg_result/include -g


     


  


  


  An error occurred, as detailed below :

  


  test_ffmpeg.c: In function 'main':
test_ffmpeg.c:63:3: warning: 'codec' is deprecated [-Wdeprecated-declarations]
AVStream *out_stream = avformat_new_stream(ofmt_ctx, in_stream->codec->codec);
^~~~~~~~
In file included from test_ffmpeg.c:4:
/data/ffmpeg-4.3/ffmpeg_result/include/libavformat/avformat.h:880:21: note: declared here
AVCodecContext *codec;
^~~~~
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: warning:
libswresample.so.3, needed by /data/ffmpeg-4.3/ffmpeg_result/lib/libavcodec.so, not found (try
using -rpath or -rpath-link)
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: warning:
libswscale.so.5, needed by /data/ffmpeg-4.3/ffmpeg_result/lib/libavfilter.so, not found (try
using -rpath or -rpath-link)
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: warning:
libpostproc.so.55, needed by /data/ffmpeg-4.3/ffmpeg_result/lib/libavfilter.so, not found (try
using -rpath or -rpath-link)
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `sws_freeContext@LIBSWSCALE_5'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `pp_get_context@LIBPOSTPROC_55'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `swr_alloc_set_opts@LIBSWRESAMPLE_3'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `pp_postprocess@LIBPOSTPROC_55'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `swr_get_class@LIBSWRESAMPLE_3'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `sws_scaleVec@LIBSWSCALE_5'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to
`swr_set_channel_mapping@LIBSWRESAMPLE_3'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `sws_getCoefficients@LIBSWSCALE_5'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavcodec.so: undefined reference to `swr_alloc@LIBSWRESAMPLE_3'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `sws_getGaussianVec@LIBSWSCALE_5'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to
`pp_get_mode_by_name_and_quality@LIBPOSTPROC_55'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `swr_next_pts@LIBSWRESAMPLE_3'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavcodec.so: undefined reference to `swr_init@LIBSWRESAMPLE_3'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to
`sws_setColorspaceDetails@LIBSWSCALE_5'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `sws_isSupportedOutput@LIBSWSCALE_5'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `sws_init_context@LIBSWSCALE_5'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavcodec.so: undefined reference to `swr_close@LIBSWRESAMPLE_3'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `sws_alloc_context@LIBSWSCALE_5'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `sws_scale@LIBSWSCALE_5'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `swr_get_delay@LIBSWRESAMPLE_3'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `pp_free_context@LIBPOSTPROC_55'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavcodec.so: undefined reference to `swr_convert@LIBSWRESAMPLE_3'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `sws_freeVec@LIBSWSCALE_5'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavcodec.so: undefined reference to `swr_is_initialized@LIBSWRESAMPLE_3'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `sws_getContext@LIBSWSCALE_5'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `pp_free_mode@LIBPOSTPROC_55'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `sws_isSupportedInput@LIBSWSCALE_5'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `sws_getCachedContext@LIBSWSCALE_5'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `swr_set_matrix@LIBSWRESAMPLE_3'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to `sws_get_class@LIBSWSCALE_5'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavcodec.so: undefined reference to `swr_free@LIBSWRESAMPLE_3'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to
`sws_getColorspaceDetails@LIBSWSCALE_5'
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-gnu/bin/ld: /data/ffmpeg-
4.3/ffmpeg_result/lib/libavfilter.so: undefined reference to
`sws_isSupportedEndiannessConversion@LIBSWSCALE_5'
collect2: error: ld returned 1 exit status


  


• broadcast HLS/TS Stream from FFMPEG

  2 août 2014, par Dylan Lundy

  I’m still wrapping my head around most of this, so sorry if my issue is an obvious one !

  I’m trying to broadcast a FFMPEG ’stream’ to a HLS stream i can load into a webpage.

  My understanding is that i need a media server to broadcast it from FFMPEG to a HLS stream ? with FFMPEG feeding the data to the server. I’m probably wrong though.

  I previously semi achieved what i want to do with stream-m, however it was too slow (less than 1 FPS) and wasn’t broadcasting in HLS.

  Previously, the steps i went through were to launch the stream-m server. then launce FFMPEG with the following command :

  ffmpeg.exe -f dshow -i video="screen-capture-recorder" -r 1 -g 2 -vcodec libvpx -vb 1024 -f matroska http://localhost:8080/publish/first?password=secret

  I could connect to the stream with Chrome using the following HTML :

  <video src="http://localhost/consume" autoplay="autoplay">
  
  </video>

  The issue is that this was slow, unusable in fact, and it’s not in HLS/H264.

  I need the feed in the specific codec as i intend to send it to a WiiU browser, which only supports "M3U8+TS(HTTPLiveStreaming)"
  http://www.nintendo.com/wiiu/built-in-software/browser-specs/

  Cheers

• iOS compatible live mp4 stream

  12 août 2017, par Salvo Passaro

  I have a video source which gives me a raw h264 stream. I need to re-stream this live input in a way it is cross-compatible and playable without any plugin. I’ve tried using ffmpeg+ffserver to produce a fragmented mp4, but unfortunately my iPhone isn’t playing it.

  Is there a way to make it (raw h264 in mp4 container) playable in iOS’s Safari, or maybe another cross-platform container ?

  Ps : i’m using a raspberry pi 3 to host ffmpeg processes, so i’m avoiding re encoding tasks ; instead i’m just trying to fit my raw h264 in a "ios-compatible" container and make it accessible through a media server.