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• Output filename extension in fswatch and ffmpeg

  30 juin 2020, par rr09

  I'm having issue with the file-naming extension output. My input is JPG files that needs to convert to MP4 using FFMPEG. However, when I run the code below it output as img1.jpg.mp4 including the input file extension instead of just img1.mp4.

  


  fswatch -e ".*" -i "\\.jpg$" . |xargs -n1 basename|xargs -n1 -t -I {} sh -c 'pwd;[[ -f {} ]] && ffmpeg -y -loop 1 -i "{}" -vf "fade=t=in:st=0:d=1,fade=t=out:st=2:d=1" -preset "ultrafast" -c:v libx264 -t 3 -pix_fmt yuv420p "{}.mp4"'


  


  Any help is much appreciated.

  


  Running on MAC, SH/BASH

  


  EDITED :

  


  BTW I also tried a loop to do the trick like the code below, but I'm looking to more neat solution to fix it in the same line of code above or call function after FSWATCH successful operation.

  


   for file in
     *.jpg.mp4; do
        mv "$file" "$(basename "$file" .jpg.mp4).mp4"
    done


  


• Exoplayer FFMPEG issue. Video froze on the first frame after adding Exoplayer FFMPEG extension

  13 mai 2020, par Aravind

  I am working on adding Exoplayer and it works fine. But some of the videos were playing without audio, it plays fine in VLC medial player. So I was suggested to add Exoplayer FFMPEG. I added Exoplayer FFMPEG extension and I modified the code as below,

  



  val videoTrackSelectionFactory: TrackSelection.Factory = AdaptiveTrackSelection.Factory(BANDWIDTH_METER)
val trackSelector: TrackSelector = DefaultTrackSelector(videoTrackSelectionFactory)

val renderersFactory: RenderersFactory = DefaultRenderersFactory(mContext, null, EXTENSION_RENDERER_MODE_PREFER)
mPlayer = ExoPlayerFactory.newSimpleInstance(mContext, renderersFactory, trackSelector)
mediaSource = mMediaSourceUri?.let { createLeafMediaSource(it) }!!
mPlayer.prepare(mediaSource)


  



  After I modified the video stuck with the first frame and it keeps on loading. I checked the log and I didn't see any error.

  



  

  



  Can anyone help me with this ? Thanks in advance !

  


• How to build the Exoplayer ffmpeg extension with the GSM codec ?

  4 mars 2020, par MadCoconut

  I wanted to use Exoplayer to play an audio file but when I tried I got this exception :

  2019-12-13 10:08:14.827 28972-29388/com.XXX.XXX E/ExoPlayerImplInternal: Source error.
  
      com.google.android.exoplayer2.ParserException: Expected block alignment: 0; got: 65
  
          at com.google.android.exoplayer2.extractor.wav.WavHeaderReader.peek(WavHeaderReader.java:81)
  
          at com.google.android.exoplayer2.extractor.wav.WavExtractor.sniff(WavExtractor.java:50)
  
          at com.google.android.exoplayer2.source.ProgressiveMediaPeriod$ExtractorHolder.selectExtractor(ProgressiveMediaPeriod.java:1061)
  
          at com.google.android.exoplayer2.source.ProgressiveMediaPeriod$ExtractingLoadable.load(ProgressiveMediaPeriod.java:952)
  
          at com.google.android.exoplayer2.upstream.Loader$LoadTask.run(Loader.java:394)
  
          at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
  
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
  
          at java.lang.Thread.run(Thread.java:764)

  The audio files I have to play are wav files (GSM_MS, 13kb/s)

  I tried to build the the Exoplayer Ffmpeg extension following the tutorial :
  https://github.com/google/ExoPlayer/tree/release-v2/extensions/ffmpeg

  I cloned the Exoplayer repository and I downloaded the Android NDK version r20b.

  I modified the build script build_ffmpeg.sh to enable the libgsm :

  COMMON_OPTIONS=“
  
  …
  
     —enable-libgsm
  
  "

  I defined the required environment variables :

  • FFMPEG_EXT_PATH=“/extensions/ffmpeg/src/main/jni”
  • NDK_PATH="/Users/USER/Documents/Android/android-ndk-r20b/"
  • HOST_PLATFORM(“darwin-x86_64”)
  • ENABLED_DECODERS(all the decoders available https://exoplayer.dev/supported-formats.html#ffmpeg-extension)

  Then I built the library using the provided command line :

  cd "${FFMPEG_EXT_PATH}" && \
  
  ./build_ffmpeg.sh \
  
   "${FFMPEG_EXT_PATH}" "${NDK_PATH}" "${HOST_PLATFORM}" "${ENABLED_DECODERS[@]}"

  But something goes wrong during the build process :

  remote: Enumerating objects: 38, done.
  
  remote: Counting objects: 100% (38/38), done.
  
  remote: Compressing objects: 100% (26/26), done.
  
  remote: Total 26 (delta 20), reused 0 (delta 0)
  
  Unpacking objects: 100% (26/26), done.
  
  From git://source.ffmpeg.org/ffmpeg
  
    377a095dc3..bd83191271  master     -> origin/master
  
  Already up to date.
  
  Already on 'release/4.2'
  
  Your branch is up to date with 'origin/release/4.2'.
  
  ERROR: libgsm not found
  
  
  
  If you think configure made a mistake, make sure you are using the latest
  
  version from Git.  If the latest version fails, report the problem to the
  
  ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
  
  Include the log file "ffbuild/config.log" produced by configure as this will help
  
  solve the problem.
  
  GEN libavutil/libavutil.version
  
  GEN libswresample/libswresample.version
  
  GEN libavresample/libavresample.version
  
  GEN libavcodec/libavcodec.version
  
  CC  libavcodec/aac_ac3_parser.o
  
  CC  libavcodec/aacdec.o
  
  CC  libavcodec/aacps_float.o
  
  CC  libavcodec/aacpsdsp_float.o
  
  CC  libavcodec/aacsbr.o
  
  CC  libavcodec/aactab.o
  
  CC  libavcodec/ac3.o
  
  CC  libavcodec/ac3_parser.o
  
  CC  libavcodec/ac3dec_data.o
  
  CC  libavcodec/ac3dec_float.o

  Here is a part of the content of the config.log file located in the ffmpeg checked out library (/extensions/ffmpeg/src/main/jni/ffmpeg/ffbuild/config.log :

  …
  
  /Users/USER/Documents/Android/android-ndk-r20b/toolchains/llvm/prebuilt/darwin-x86_64/bin/i686-linux-android16-clang -march=i686 -Wl,--as-needed -Wl,-z,noexecstack -pie -fPIE -pie -o /var/folders/9l/trkjpc091_79vk3krfpykbsh0000gn/T//ffconf.hv2yROG1/test /var/folders/9l/trkjpc091_79vk3krfpykbsh0000gn/T//ffconf.hv2yROG1/test.o
  
  /var/folders/9l/trkjpc091_79vk3krfpykbsh0000gn/T//ffconf.hv2yROG1/test.o:test.c:function foo: error: undefined reference to 'cexp'
  
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  
  check_lib libgsm gsm.h gsm_create -lgsm
  
  check_func_headers gsm.h gsm_create -lgsm
  
  test_ld cc -lgsm
  
  test_cc
  
  BEGIN /var/folders/9l/trkjpc091_79vk3krfpykbsh0000gn/T//ffconf.hv2yROG1/test.c
  
      1   #include 
  
      2   #include 
  
      3   long check_gsm_create(void) { return (long) gsm_create; }
  
      4   int main(void) { int ret = 0;
  
      5    ret |= ((intptr_t)check_gsm_create) & 0xFFFF;
  
      6   return ret; }
  
  END /var/folders/9l/trkjpc091_79vk3krfpykbsh0000gn/T//ffconf.hv2yROG1/test.c
  
  /Users/USER/Documents/Android/android-ndk-r20b/toolchains/llvm/prebuilt/darwin-x86_64/bin/i686-linux-android16-clang -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Dstrtod=avpriv_strtod -DPIC -march=i686 -std=c11 -fPIE -fomit-frame-pointer -fPIC -pthread -c -o /var/folders/9l/trkjpc091_79vk3krfpykbsh0000gn/T//ffconf.hv2yROG1/test.o /var/folders/9l/trkjpc091_79vk3krfpykbsh0000gn/T//ffconf.hv2yROG1/test.c
  
  /var/folders/9l/trkjpc091_79vk3krfpykbsh0000gn/T//ffconf.hv2yROG1/test.c:1:10: fatal error: 'gsm.h' file not found
  
  …

  The gsm.h file is located there : /extensions/ffmpeg/src/main/jni/ffmpeg/libavcodec

  I assume this path has been configured to be used by the build script.

  Any help is much appreciated.