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• ffmpeg kit flutter video compressor

  23 avril 2022, par Kimse

  I am not experienced with ffmpeg. So I'm sorry if I'm asking the wrong question in the wrong place.
i am trying to make a video compressor, i add the dependency exactly like : ffmpeg_kit_flutter_full_gpl: ^4.5.1
and The code I wrote is like :

  


  compress(path) {
  FFmpegKit.executeAsync("-i $path -c:a copy -c:v libx264 -s 848x360 output.mp4", (session) async {
  final returnCode = await session.getReturnCode();
 if (ReturnCode.isSuccess(returnCode)){

     print("işlem başarılı");
  // SUCCESS

 } else if (ReturnCode.isCancel(returnCode)) {

  print("iptal edildi");
 // CANCEL

 } else {

   print("hata oluştu");
   print(await session.getFailStackTrace());
   // ERROR

 }
});


  


  }

  


  and im calling this method like :

  


  asset.originFile.then((fle) {
       var path = fle!.path;
       compress(path);
       }
);


  


  it always returns error condition for some reason. and session.getFailStackTrace() is null.

  


  My first question is what do you think is wrong here ?

  


  And secondly how can I detect what the error is in such cases ?

  


  thanks in advance :)

  


• upload and stream ffmpeg stream chunk and mpd file in s3

  29 juin 2024, par Kamruzzaman Rabeen

  i want to make ann web app where i can upload a video. After uploading video its should be compress by ffmpeg after that i want to keep the data on aws S3.

  


  I can compress by ffmpeg. but i have no idea which file i should keep in s3 because after compress its create many chunk file and one mpd xml file.

  


  Also i want to stream the video from mpd file after fetching data from s3.
here is my upload function code.
const videoPath = req.file.path; const outputDir = path.join(__dirname, 'dash'); const uniqueId = uuidv4(); const outputFilePath = path.join(outputDir, $uniqueId_stream.mpd); const bucketName = process.env.S3_BUCKET_NAME; const s3Key = dash/$uniqueId_stream.mpd` ;

  


  // Ensure the output directory exists
if (!fs.existsSync(outputDir)) {
    fs.mkdirSync(outputDir, { recursive: true });
}

ffmpeg(videoPath)
    .outputOptions([
        '-profile:v main',
        '-use_template 1',
        '-use_timeline 1',
        '-b:v 1000k',
        '-b:a 128k',
        '-f dash'
    ])
    .on('end', async () => {
        console.log('DASH file created successfully');
        try {
            const s3Url = await uploadToS3(outputFilePath, bucketName, s3Key);
            res.status(200).json({ message: 'Video uploaded and DASH file created', url:    s3Url });
        } catch (err) {
            console.error('Error uploading to S3: ', err);
            res.status(500).json({ message: 'Error uploading to S3', error: err.message });
        }
    })
    .on('error', (err) => {
        console.error('Error processing video: ', err);
        res.status(500).json({ message: 'Error processing video', error: err.message });
    })
    .save(outputFilePath);`

`const uploadToS3 = (filePath, bucketName, key) => {
return new Promise((resolve, reject) => {
    fs.readFile(filePath, (err, data) => {
        if (err) return reject(err);

        const params = {
            Bucket: bucketName,
            Key: key,
            Body: data,
            ContentType: 'application/dash+xml'
        };

        s3.upload(params, (err, data) => {
            if (err) return reject(err);
            resolve(data.Location);
        });
    });
});


  


   ;`

  


  i have tried this version of code.

  


  now i want to know what is the best to way to keep data in s3 for compress video after ffmpeg.

  


• How to configure FFMPEG to generate position independent code on IOS

  8 juillet 2013, par madadi

  I am developing an app on iOS which makes use of FFMPEG for video decoding. I want to get 'position independent code' of FFMPEG working on my app. --enable-pic option in the FFMPEG configuration generates position independent code only if I set --disable-asm. I concluded this when I ran the otool on my app(otool -hv 'appname'). Below are the details :

  If I set --enable-pic alone, below is the output with otool :

  magic     cputype  cpusubtype  caps  filetype  ncmds  sizeofcmds  flags
  
  MH_MAGIC  ARM      V7          0x00  EXECUTE   29     3724        NOUNDEFS DYLDLINK TWOLEVEL WEAK_DEFINES BINDS_TO_WEAK

  If I set --enable-pic and --disable-asm below is the output with otool,

  magic     cputype  cpusubtype  caps  filetype  ncmds  sizeofcmds  flags
  
  MH_MAGIC  ARM      V7          0x00  EXECUTE   51     5520        NOUNDEFS DYLDLINK TWOLEVEL WEAK_DEFINES BINDS_TO_WEAK **PIE** 

  Below are my configuration settings for FFMPEG(build-ffmpeg-ios.sh) :

  if [  `uname` =  "Darwin" ]; then
  
    SEDCMD="sed -i '' "
  
  else
  
    SEDCMD="sed -i "
  
  fi
  
  
  
  
  
  make clean
  
  ./configure \
  
      --prefix=$PREFIX \
  
      --enable-version3 \
  
      --enable-static \
  
      --disable-shared \
  
      --disable-doc \
  
      --disable-ffmpeg \
  
      --disable-ffplay \
  
      --disable-ffprobe \
  
      --disable-ffserver \
  
      --disable-avdevice \
  
      --disable-avfilter \
  
      --disable-postproc \
  
      --enable-small \
  
      --cross-prefix="$DEVROOT/usr/bin/" \
  
      --enable-cross-compile \
  
      --target-os=darwin \
  
      --arch=$ARCH \
  
      --cpu=$CPU \
  
      --cc="$CC" \
  
      --as="$AS" \
  
      --extra-cflags="$CFLAGS" \
  
      --extra-ldflags="$CFLAGS" \
  
      --disable-symver \
  
      --disable-debug \
  
      --disable-indevs \
  
      --disable-encoders \
  
      --disable-bsfs \
  
      --enable-pic \
  
      --disable-filters \
  
      $CONFIGURE_FLAGS || exit 1;
  
  $SEDCMD 's/HAVE_INLINE_ASM 1/HAVE_INLINE_ASM 0/g' config.h
  
  make install || exit 1;

  And below is the make file I use(iOS.mk) :

  FFMPEG_LIBS := libavcodec.a libavformat.a libavutil.a libswscale.a
  
  
  
  IOS_ARMV7_FFMPEG_LIB := $(addprefix build/ios/armv7/lib/, $(FFMPEG_LIBS))
  
  
  
  IOS_UNI_FFMPEG_LIB := $(addprefix build/ios/universal/lib/, $(FFMPEG_LIBS))
  
  
  
  
  
  
  
  IPHONE_SDK_VERSION := "5.0"
  
  IPHONE_DEPLOY_SDK := "3.2"
  
  
  
  ALL_IOS_LIBS := $(IOS_UNI_FFMPEG_LIB) 
  
  
  
  build/ios/universal/lib/%.a : build/ios/armv7/lib/%.a
  
      mkdir -p build/ios/universal/lib
  
      lipo -create -output $@ $^
  
  
  
  
  
  
  
  $(IOS_ARMV7_FFMPEG_LIB): 
  
      export PREFIX="`$(ABSPATH) build/ios/armv7`" && \
  
      export ARCH="arm" && \
  
      export CPU="cortex-a8" && \
  
      export IOS_BASE_SDK="$(IPHONE_SDK_VERSION)" && \
  
      export IOS_DEPLOY_TGT="$(IPHONE_DEPLOY_SDK)" && \
  
      export CONFIGURE_FLAGS="--enable-neon" && \
  
      export PATH="`$(ABSPATH) venders`:$$PATH" && \
  
      cd venders/ffmpeg && bash ../iphone-compile.sh arm7 ../build-ffmpeg-ios.sh

  Can someone please help me with getting the FFMPEG up and running with both 'pic' and assembly optimization enabled. Without assembly optimizastion, FFMPEG would not be helpful to me as the video decoding is extremely slow.