Recherche avancée

Sur d’autres sites (3560)

• Checking processor capabilities in android

  29 avril 2014, par StackOverflowed

  I’m using FFMPEG in an app, and I’m using the following configuration :

  --extra-cflags=' -march=armv7-a -mfloat-abi=softfp -mfpu=neon'

  I’m targeting 4.0+ so I believe armv7-a should be supported by most non Intel devices, and I’m sure the neon extension is supported in most devices as well, but I’m not sure how I can find that out for all 2000+ devices.

  Is there a way to check in Android the processor type and extensions and/or in the Google Play Store to limit the apk to devices with certain processors ?

• Static Compilation of FFmpeg with x264 support

  17 février 2014, par b1izzard

  Based on the Tutorial, I tried to build the latest FFmpeg binary with x264 support for Command line execution using Android-ndk-r9c.

  I had built the x264 using the below script :

   #!/bin/bash        
  
  
  
  
  
  PREBUILT=/home/blizzard/bin/android-ndk-r9c/toolchains/arm-linux-androideabi-4.6/prebuilt
  
                  PLATFORM=/home/blizzard/bin/android-ndk-r9c/platforms/android-9/arch-arm
  
                  PREFIX=/home/blizzard/bin/android-ndk-r9c/sources/ffmpeg
  
  
  
  
  
              ./configure --prefix=$PREFIX \
  
              --enable-static \
  
              --enable-pic \
  
              --disable-asm \
  
              --disable-cli \             
  
              --host=arm-linux \
  
              --cross-prefix=$PREBUILT/linux-x86_64/bin/arm-linux-androideabi- \
  
              --sysroot=$PLATFORM
  
  
  
              make
  
              sudo make install
  
              sudo ldconfig

  For building FFmpeg I had used the below script :

   #!/bin/bash                    
  
                PLATFORM=/home/blizzard/bin/android-ndk-r9c/platforms/android-9/arch-arm
  
                PREBUILT=/home/blizzard/bin/android-ndk-r9c/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64
  
                PREFIX=/home/blizzard/bin/android-ndk-r9c/sources/ffmpeg
  
  
  
                  function build_one
  
                  {
  
                  ./configure --target-os=linux --prefix=$PREFIX \
  
                  --arch=arm \
  
                  --cpu=cortex-a8 \
  
                  --enable-cross-compile \
  
                  --enable-runtime-cpudetect \
  
                  --disable-asm \
  
                  --enable-static \
  
                  --disable-shared \
  
                  --arch=arm \
  
                  --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
  
                  --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
  
                  --disable-stripping \
  
                  --nm=$PREBUILT/bin/arm-linux-androideabi-nm \
  
                  --sysroot=$PLATFORM \
  
                  --enable-nonfree \
  
                  --enable-version3 \
  
                  --disable-everything \
  
                  --enable-gpl \
  
                  --disable-doc \
  
                  --enable-avresample \
  
                  --enable-demuxer=rtsp \
  
                  --enable-muxer=rtsp \
  
                  --disable-ffplay \
  
                  --disable-ffserver \
  
                  --enable-ffmpeg \
  
                  --disable-ffprobe \
  
                  --enable-libx264 \
  
                  --enable-encoder=libx264 \
  
                  --enable-decoder=h264 \
  
                  --enable-protocol=rtp \
  
                  --enable-hwaccels \
  
                  --enable-zlib \
  
                  --disable-devices \
  
                  --disable-avdevice \
  
                  --extra-cflags="-I/home/blizzard/bin/android-ndk-r9c/sources/ffmpeg/include -fPIC -DANDROID -D__thumb__ -mthumb -Wfatal-errors -Wno-deprecated -mfloat-abi=softfp -marm -march=armv7-a" \
  
                  --extra-ldflags="-L/home/blizzard/bin/android-ndk-r9c/sources/ffmpeg/lib"
  
                  make -j4 install
  
  
  
                  $PREBUILT/bin/arm-linux-androideabi-ar d libavcodec/libavcodec.a inverse.o
  
                  $PREBUILT/bin/arm-linux-androideabi-ld -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -L$PREFIX/lib  -soname libffmpeg.so -shared -nostdlib  -z noexecstack -Bsymbolic --whole-archive --no-undefined -o $PREFIX/libffmpeg.so libavcodec/libavcodec.a libavfilter/libavfilter.a libavresample/libavresample.a libavformat/libavformat.a libavutil/libavutil.a libswscale/libswscale.a -lc -lm -lz -ldl -llog -lx264  --dynamic-linker=/system/bin/linker $PREBUILT/lib/gcc/arm-linux-androideabi/4.6/libgcc.a
  
                  }
  
  
  
                  build_one

  The output of the script is

  install prefix            /home/blizzard/bin/android-ndk-r9c/sources/ffmpeg
  
  source path               .
  
  C compiler                /home/blizzard/bin/android-ndk-r9c/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc
  
  C library                 bionic
  
  host C compiler           gcc
  
  host C library            glibc
  
  ARCH                      c (cortex-a8)
  
  big-endian                no
  
  runtime cpu detection     yes
  
  debug symbols             yes
  
  strip symbols             no
  
  optimize for size         no
  
  optimizations             yes
  
  static                    yes
  
  shared                    no
  
  postprocessing support    yes
  
  new filter support        yes
  
  network support           yes
  
  threading support         pthreads
  
  safe bitstream reader     yes
  
  SDL support               no
  
  opencl enabled            no
  
  libzvbi enabled           no
  
  texi2html enabled         yes
  
  perl enabled              yes
  
  pod2man enabled           yes
  
  makeinfo enabled          no
  
  
  
  External libraries:
  
  libx264         zlib
  
  
  
  Enabled decoders:
  
  h264
  
  
  
  Enabled encoders:
  
  libx264
  
  
  
  Enabled hwaccels:
  
  
  
  Enabled parsers:
  
  
  
  Enabled demuxers:
  
  asf         mpegts          rtsp
  
  mov         rm
  
  
  
  Enabled muxers:
  
  rtp         rtsp
  
  
  
  Enabled protocols:
  
  http            tcp         udp
  
  rtp
  
  
  
  Enabled filters:
  
  aformat         format          setpts
  
  anull           null            trim
  
  atrim
  
  
  
  Enabled bsfs:
  
  
  
  Enabled indevs:
  
  
  
  Enabled outdevs:
  
  
  
  License: nonfree and unredistributable
  
  Creating config.mak, config.h, and doc/config.texi...
  
  config.h is unchanged
  
  libavutil/avconfig.h is unchanged
  
  
  
  WARNING: /home/blizzard/bin/android-ndk-r9c/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi-pkg-config not found, library detection may fail.
  
  INSTALL install-progs-yes
  
  INSTALL ffmpeg
  
  INSTALL presets/libvpx-1080p50_60.ffpreset
  
  INSTALL presets/libvpx-1080p.ffpreset
  
  INSTALL presets/libvpx-360p.ffpreset
  
  INSTALL presets/libvpx-720p50_60.ffpreset
  
  INSTALL presets/libvpx-720p.ffpreset
  
  INSTALL presets/libx264-ipod320.ffpreset
  
  INSTALL presets/libx264-ipod640.ffpreset
  
  INSTALL doc/ffprobe.xsd
  
  INSTALL doc/examples/decoding_encoding.c
  
  INSTALL doc/examples/demuxing_decoding.c
  
  INSTALL doc/examples/filtering_audio.c
  
  INSTALL doc/examples/filtering_video.c
  
  INSTALL doc/examples/metadata.c
  
  INSTALL doc/examples/muxing.c
  
  INSTALL doc/examples/remuxing.c
  
  INSTALL doc/examples/resampling_audio.c
  
  INSTALL doc/examples/scaling_video.c
  
  INSTALL doc/examples/transcode_aac.c
  
  INSTALL doc/examples/Makefile
  
  INSTALL doc/examples/README
  
  INSTALL libavfilter/libavfilter.a
  
  INSTALL libavformat/libavformat.a
  
  INSTALL presets/libvpx-1080p50_60.ffpreset
  
  INSTALL presets/libvpx-1080p.ffpreset
  
  INSTALL presets/libvpx-360p.ffpreset
  
  INSTALL presets/libvpx-720p50_60.ffpreset
  
  INSTALL presets/libvpx-720p.ffpreset
  
  INSTALL presets/libx264-ipod320.ffpreset
  
  INSTALL presets/libx264-ipod640.ffpreset
  
  INSTALL doc/ffprobe.xsd
  
  INSTALL doc/examples/decoding_encoding.c
  
  INSTALL doc/examples/demuxing_decoding.c
  
  INSTALL doc/examples/filtering_audio.c
  
  INSTALL doc/examples/filtering_video.c
  
  INSTALL doc/examples/metadata.c
  
  INSTALL doc/examples/muxing.c
  
  INSTALL doc/examples/remuxing.c
  
  INSTALL doc/examples/resampling_audio.c
  
  INSTALL doc/examples/scaling_video.c
  
  INSTALL doc/examples/transcode_aac.c
  
  INSTALL doc/examples/Makefile
  
  INSTALL doc/examples/README
  
  INSTALL libavresample/libavresample.a
  
  INSTALL libavcodec/libavcodec.a
  
  INSTALL libpostproc/libpostproc.a
  
  INSTALL libswresample/libswresample.a
  
  INSTALL libavutil/libavutil.a
  
  a
  
  INSTALL libavfilter/asrc_abuffer.h
  
  INSTALL libavfilter/avcodec.h
  
  INSTALL libavfilter/avfilter.h
  
  INSTALL libavfilter/avfiltergraph.h
  
  INSTALL libavfilter/buffersink.h
  
  INSTALL libavfilter/buffersrc.h
  
  INSTALL libavfilter/version.h
  
  INSTALL libavformat/avformat.h
  
  INSTALL libavformat/avio.h
  
  INSTALL libavformat/version.h
  
  INSTALL libavfilter/libavfilter.pc
  
  INSTALL libavformat/libavformat.pc
  
  INSTALL libavresample/avresample.h
  
  INSTALL libavresample/version.h
  
  INSTALL libavresample/libavresample.pc
  
  INSTALL libavcodec/avcodec.h
  
  INSTALL libavcodec/avfft.h
  
  INSTALL libavcodec/dxva2.h
  
  INSTALL libavcodec/old_codec_ids.h
  
  INSTALL libavcodec/vaapi.h
  
  INSTALL libavcodec/vda.h
  
  INSTALL libavcodec/vdpau.h
  
  INSTALL libavcodec/version.h
  
  INSTALL libavcodec/xvmc.h
  
  INSTALL libavcodec/libavcodec.pc
  
  INSTALL libpostproc/postprocess.h
  
  INSTALL libpostproc/version.h
  
  INSTALL libpostproc/libpostproc.pc
  
  INSTALL libswresample/swresample.h
  
  INSTALL libswresample/version.h
  
  INSTALL libswscale/swscale.h
  
  INSTALL libswscale/version.h
  
  INSTALL libavutil/adler32.h
  
  INSTALL libavutil/aes.h
  
  INSTALL libavutil/attributes.h
  
  INSTALL libavutil/audio_fifo.h
  
  INSTALL libavutil/audioconvert.h
  
  INSTALL libavutil/avassert.h
  
  INSTALL libavutil/avstring.h
  
  INSTALL libavutil/avutil.h
  
  INSTALL libavutil/base64.h
  
  INSTALL libavutil/blowfish.h
  
  INSTALL libavutil/bprint.h
  
  INSTALL libavutil/bswap.h
  
  INSTALL libavutil/buffer.h
  
  INSTALL libavutil/channel_layout.h
  
  INSTALL libavutil/common.h
  
  INSTALL libavutil/cpu.h
  
  INSTALL libavutil/crc.h
  
  INSTALL libavutil/error.h
  
  INSTALL libavutil/eval.h
  
  INSTALL libavutil/fifo.h
  
  INSTALL libavutil/file.h
  
  INSTALL libavutil/frame.h
  
  INSTALL libavutil/hmac.h
  
  INSTALL libavutil/imgutils.h
  
  INSTALL libavutil/intfloat.h
  
  INSTALL libavutil/intfloat_readwrite.h
  
  INSTALL libavutil/intreadwrite.h
  
  INSTALL libavutil/lfg.h
  
  INSTALL libavutil/log.h
  
  INSTALL libavutil/macros.h
  
  INSTALL libavutil/mathematics.h
  
  INSTALL libavutil/md5.h
  
  INSTALL libavutil/mem.h
  
  INSTALL libavutil/murmur3.h
  
  INSTALL libavutil/dict.h
  
  INSTALL libavutil/old_pix_fmts.h
  
  INSTALL libavutil/opt.h
  
  INSTALL libavutil/parseutils.h
  
  INSTALL libavutil/pixdesc.h
  
  INSTALL libavutil/pixfmt.h
  
  INSTALL libavutil/random_seed.h
  
  INSTALL libavutil/rational.h
  
  INSTALL libavutil/ripemd.h
  
  INSTALL libavutil/samplefmt.h
  
  INSTALL libavutil/sha.h
  
  INSTALL libavutil/sha512.h
  
  INSTALL libavutil/stereo3d.h
  
  INSTALL libavutil/time.h
  
  INSTALL libavutil/timecode.h
  
  INSTALL libavutil/timestamp.h
  
  INSTALL libavutil/version.h
  
  INSTALL libavutil/xtea.h
  
  INSTALL libavutil/avconfig.h
  
  INSTALL libavutil/ffversion.h
  
  INSTALL libswresample/libswresample.pc
  
  INSTALL libswscale/libswscale.pc
  
  INSTALL libavutil/libavutil.pc

  When I tried to execute the following command using the resulting FFmpeg binary in Android Application

  ffmpeg -y -loop 1 -r 30 -i  myImage.jpg -b:v "4096k" -vf "scale=640:480" -t 3 result.mp4

  LogCat displays the following message

  02-17 15:42:45.683: D/(14511): *******Starting FFMPEG
  
  02-17 15:42:45.683: D/(14511): ***ffmpeg version N-60108-gda25a65 Copyright (c) 2000-2014 the FFmpeg developers***
  
  02-17 15:42:45.693: D/(14511): ***  built on Feb 17 2014 15:35:20 with gcc 4.6 (GCC) 20120106 (prerelease)***
  
  02-17 15:42:45.693: D/(14511): ***  configuration: --target-os=linux --prefix=/home/blizzard/bin/android-ndk-r9c/sources/ffmpeg --arch=arm --cpu=cortex-a8 --enable-cross-compile --enable-runtime-cpudetect --disable-asm --enable-static --disable-shared --arch=arm --cc=/home/blizzard/bin/android-ndk-r9c/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --cross-prefix=/home/blizzard/bin/android-ndk-r9c/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi- --disable-stripping --nm=/home/blizzard/bin/android-ndk-r9c/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi-nm --sysroot=/home/blizzard/bin/android-ndk-r9c/platforms/android-9/arch-arm --enable-nonfree --enable-version3 --disable-everything --enable-gpl --disable-doc --enable-avresample --enable-demuxer=rtsp --enable-muxer=rtsp --disable-ffplay --disable-ffserver --enable-ffmpeg --disable-ffprobe --enable-libx264 --enable-encoder=libx264 --enable-decoder=h264 --enable-protocol=rtp --enable-hwaccels --enable-zlib --disable-devices --disable-avdevice --extra-cflags='-I/home/blizzard/bin/android-ndk-r9c/sources/ffmpeg/include -fPIC -DANDROID -D__thumb__ -mthumb -Wfatal-errors -Wno-deprecated -mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=armv7-a' --extra-ldflags=-L/home/blizzard/bin/android-ndk-r9c/sources/ffmpeg/lib***
  
  02-17 15:42:45.693: D/(14511): ***  libavutil      52. 63.100 / 52. 63.100***
  
  02-17 15:42:45.693: D/(14511): ***  libavcodec     55. 49.100 / 55. 49.100***
  
  02-17 15:42:45.693: D/(14511): ***  libavformat    55. 25.101 / 55. 25.101***
  
  02-17 15:42:45.693: D/(14511): ***  libavfilter     4.  1.100 /  4.  1.100***
  
  02-17 15:42:45.693: D/(14511): ***  libavresample   1.  1.  0 /  1.  1.  0***
  
  02-17 15:42:45.693: D/(14511): ***  libswscale      2.  5.101 /  2.  5.101***
  
  02-17 15:42:45.693: D/(14511): ***  libswresample   0. 17.104 /  0. 17.104***
  
  02-17 15:42:45.693: D/(14511): ***  libpostproc    52.  3.100 / 52.  3.100***
  
  02-17 15:42:45.693: D/(14511): ***Unrecognized option 'loop'.***
  
  02-17 15:42:45.693: D/(14511): ***Error splitting the argument list: Option not found***
  
  02-17 15:42:45.693: D/(14511): ****ending FFMPEG****

  Can anybody help me in building the latest version of FFmpeg or Can you share the latest FFMpeg binary for Android ?

• Long Overdue MediaWiki Upgrade

  5 février 2014, par Multimedia Mike — General

  What do I do ? What I do ? This library book is 42 years overdue !
  I admit that it’s mine, yet I can’t pay the fine,
  Should I turn it in or should I hide it again ?
  What do I do ? What do I do ?

  I internalized the forgoing paean to the perils of procrastination by Shel Silverstein in my formative years. It’s probably why I’ve never paid a single cent in late fees in my entire life.

  However, I have been woefully negligent as the steward of the MediaWiki software that drives the world famous MultimediaWiki, the internet’s central repository of obscure technical knowledge related to multimedia. It is currently running of version 1.6 software. The latest version is 1.22.

  The Story So Far
  According to my records, I first set up the wiki late in 2005. I don’t know which MediaWiki release I was using at the time. I probably conducted a few upgrades in the early days, but that went by the wayside perhaps in 2007. My web host stopped allowing shell access and the MediaWiki upgrade process pretty much requires running a PHP script from a command line. Upgrade time came around and I put off the project. Weeks turned into months turned into years until, according to some notes, the wiki abruptly stopped working in July, 2011. Suddenly, there were PHP errors about “Namespace” being a reserved word.

  While I finally laid out a plan to upgrade the wiki after all these years, I eventually found that the problem had been caused when my webhost upgraded from PHP 5.2 -> 5.3. I also learned of a small number of code changes that caused the problem to go away, thus kicking the can down the road once more.

  Then a new problem showed up last week. I think it might be related to a new version of PHP again. This time, a few other things on my site broke, and I learned that my webhost now allows me to select a PHP version to use (with the version then set to “auto”, which didn’t yield much information). Rolling back to an earlier version of PHP might have solved the problem easily.

  But NO ! I made the determination that this goes no further. I want this wiki upgraded.

  The Arduous Upgrade Path
  There are 2 general upgrade paths I can think of :
  

  1. Upgrade in place on the server
  2. Upgrade offline and put the site back on the server

  Approach #1 is problematic since I don’t have direct shell access, though I considered using something like PHP Shell. Approach #2 involves getting the entire set of wiki files and a backup of the MySQL tables. This is workable since I keep automated backups of these items anyway.

  In fairly short order, I was able to set up a working copy of the MultimediaWiki hosted on a local Linux machine. Now what’s the move ? The MediaWiki software I’m running is 1.6.10. The very latest, as of this upgrade project is 1.22.2. I suppose it’s way too much to hope that the software will upgrade cleanly from 1.6.x straight to 1.22.x, but I guess it’s worth a shot…

  HA ! No chance. Okay, next idea is to march through the various versions and upgrade each in turn. MediaWiki has all their historic releases online, all the way back to the 1.3 lineage. I decided that the latest of each lineage should upgrade cleanly from anything in the previous version of lineage. E.g., 1.6.10 should upgrade cleanly to 1.7.3 (last in the 1.7 series). This seemed to be a workable strategy. So I downloaded the latest of each series, unpacked, and copied all the wiki files over the working installation and ran ‘php update.php’ in the maintenance/ directory.

  The process is tedious and not without its obstacles. I consider this penance for my years of wiki neglect. First, I run into the “PHP Parse error : syntax error, unexpected T_NAMESPACE, expecting T_STRING” issue, the same that I saw years ago after the webhost transitioned from PHP 5.2 -> 5.3. I could solve this by editing assorted files and changing “Namespace” -> “MWNamespace” (which is what MediaWiki did by version 1.13). But I would prefer not to.

  Instead, I downloaded the source for PHP 5.2 and compiled it in a separate directory, then called ‘/path/to/php/5.2/bin/php update.php’. Problem solved.

  The next problem is that a bunch of the database update scripts are specifying “Type=InnoDB”. This isn’t supported by modern MySQL databases. Now, it’s “Engine=InnoDB”. A quick search & replace at the command line fixes this for 1.6.x… and 1.7.x… and 1.8 through 1.12. Finally, at 1.13, it was no longer necessary. As a bonus, at 1.13, I was able to test the installation since Namespace had been renamed to MWNamespace. I would later learn that the table type modifications probably could have been simplified in by changing “$wgDBmysql4 = true ;” to “$wgDBmysql5 = true ;” somewhere in LocalSettings.php.

  Command line upgrading worked smoothly up through 1.18 series when I got a new syntax error :

  <br />
PHP Fatal error:  Call to a member function addMessages() on a non-object in /mnt/sdb1/archive/wiki/extensions/Cite.php on line 68<br />

  Best I could do was comment out that line. I hope that doesn’t break anything important.

  In the home stretch, the very last transition (1.21 -> 1.22) failed :

  PHP Fatal error :  Cannot redeclare wfProfileIn() (previously declared in 
  /mnt/sdb1/archive/wiki/includes/profiler/Profiler.php:33) in 
  /mnt/sdb1/archive/wiki/includes/ProfilerStub.php on line 25
  

  Apparently, this problem arises occasionally since 1.18. I found a way around it thanks to this page : Deleted the file StartProfiler.php. Who am I to argue ?

  Upon completing the transition to 1.22, the wiki doesn’t look correct– the pictures aren’t showing up. The solution was to fix the temporary directory via LocalSettings.php.

  Back To Production
  Okay, it all works again ! Locally, that is. How to get it back to the server ? My first idea was that, knowing that this upgrade process can succeed, try stepping through the upgrade process again, but tell the update.php scripts to access the database tables on multimedia.cx. This seemed to be working for awhile, even though the database update phase often took 4-5 minutes. However, the transition from 1.8.5 -> 1.9.6 took 75 minutes and then timed out. According to my notes, “This isn’t going to work.”

  The new process :

  1. Dump the database tables from the local database.
  2. Create a new database remotely (melanson_wiki_ng).
  3. Dump the database table into melanson_wiki_ng.
  4. Move the index.php file out of the wiki files directory temporarily (or rename).
  5. Modify the LocalSettings.php to talk to the new database.
  6. Perform a lftp mirror operation in order to send all the files up to the server.
  7. Send the index.php file and hope beyond hope that everything magically works.

  And that’s the story of how the updated MultimediaWiki came back online. Despite the database dump file being over 110 MB, it only tool MySQL 1m45s to transmit it all to the remote server (let’s hear it for the ‘–compress’ option). For comparison, inserting the tables back into a fresh local database took 1m07s.

  When the MultimediaWiki was first live again, it loaded, but ever so slowly. This is when I finally looked into optimization and found that I was lacking any caching. So as a bonus, the MultimediaWiki should be much faster now.

  Going Forward
  For all I know, I did everything described here in the hardest way possible. But at least I got it done. Unless I learn of a better process, future upgrades will probably look similar to this.

  Additionally, I should probably take some time to figure out what new features are part of the standard MediaWiki distribution nowadays.