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• FFMPEG HLS video can't play

  4 mai 2019, par John Doe

  I’m using ffmpeg to convert mp4 video to HLS but just copy codec without re-encoding and a lot of video having problem when playing with JWPlayer

  

  First i make a loop to find best segment duration from 15 down to 1, do it over again couple times (480p, 720p, 1080p)

  ffmpeg -i in.mp4 -codec copy -bsf:v h264_mp4toannexb -f hls -hls_list_size 0 -hls_time $second out.m3u8

  If largest segment length is smaller than 10MB then break loop and using single segment option

  ffmpeg -i in.mp4 -f hls -hls_time $second_return_from_loop -hls_list_size 0 -hls_flags single_file -codec copy -bsf:v h264_mp4toannexb out.m3u8

  Generate master playlist with info (bitrate, width x height) getting from ffprobe command

  ffprobe -i in.mp4 -v quiet -print_format json -show_format -show_streams

  Is there something wrong with my command because sometime video got freeze but sound still playing or break on seeking, this’s my first time working with ffmpeg, really appreciate your help

  UPDATED : It was error on my proxy streaming source code not ffmpeg

• FFMPEG gets in never ending condition while live streaming on YouTube

  17 avril 2019, par Nayan Katkani

  I have been working in AS3 to stream 1080P video on YouTube and video gets start uploading and almost 4-5 minutes of the video has been uploaded successfully and afterwards YouTube shows that stream has been ended, but FFMPEG will never hits on "Exit" or any other method even after waiting for next 10 minutes.

  Below is the method I am using.

  public var _nativeProcessStartupInfo:NativeProcessStartupInfo;
  
  public var _processArgs:Vector.<string>;
  
  public var _process:NativeProcess;
  
  protected function StartVideo_clickHandler(event:MouseEvent):void
  
  {
  
      _nativeProcessStartupInfo.executable = File.applicationStorageDirectory.resolvePath("ffmpeg.exe Path");
  
      _processArgs.push('-re');
  
      _processArgs.push('-i');
  
      _processArgs.push(VideoPath);
  
      _processArgs.push('-vcodec');
  
      _processArgs.push('copy');
  
      _processArgs.push('-acodec');
  
      _processArgs.push('copy');
  
      _processArgs.push('-maxrate');
  
      _processArgs.push('4500k');
  
      _processArgs.push('-bufsize');
  
      _processArgs.push('9000k');
  
      _processArgs.push('-pix_fmt'); 
  
      _processArgs.push('yuv422p');
  
      _processArgs.push('-preset');
  
      _processArgs.push('fast');
  
      _processArgs.push('-ac'); 
  
      _processArgs.push('2');
  
      _processArgs.push('-r'); 
  
      _processArgs.push('30');                            
  
      _processArgs.push('-g');
  
      _processArgs.push('60');                            
  
      _processArgs.push('-ar');
  
      _processArgs.push('44100');
  
      _processArgs.push('-f');
  
      _processArgs.push('flv');                   
  
      _processArgs.push(streamurl+'/'+streamname);
  
      _nativeProcessStartupInfo.arguments = _processArgs;
  
      _process = new NativeProcess();
  
      _process.addEventListener(ProgressEvent.STANDARD_OUTPUT_DATA, onOutputData);
  
      _process.addEventListener(ProgressEvent.STANDARD_ERROR_DATA, progress);
  
      _process.addEventListener(NativeProcessExitEvent.EXIT, onExit);
  
      _process.addEventListener(IOErrorEvent.STANDARD_OUTPUT_IO_ERROR, onIOErrorNativeProcess);
  
      _process.addEventListener(IOErrorEvent.STANDARD_ERROR_IO_ERROR, onIOErrorNativeProcess);
  
      _process.start(_nativeProcessStartupInfo);
  
  }
  
  public function onIOErrorNativeProcess(event:IOErrorEvent):void
  
  {
  
      trace(event.toString());
  
  }
  
  public function onOutputData(event:ProgressEvent):void
  
  {
  
      trace("Got: ", _process.standardOutput.readUTFBytes(_process.standardOutput.bytesAvailable)); 
  
  }
  
  public function progress(e:ProgressEvent):void 
  
  {
  
      trace(e);
  
  }
  
  public function onExit(e:NativeProcessExitEvent):void
  
  {
  
      trace(e);
  
  }
  
  </string>

  I have tried with 720P video too by changing bit rate from 4500k to 2500k which is as per YouTube and it is working fine but with 1080P something not went as per expectation.

  Here are the video details :
  Resolution : 1920*1080
  Data Rate : 3220kbps
  FrameRate : 20
  

  Thanks in advance

• Package not found - add libav to PKG_CONFIG_PATH environment variable

  19 mars 2019, par Brayton Larson

  I am attempting to build the Parrot SDK and when running the command it continuously fails due to multiple libav package variants not being found. Below is the error message.

  user@TheMysteriousMachine : /WORKING_DIRECTORY$ ./build.sh -p arsdk-native -t build-sdk -j
      [I] Starting task 'build-sdk'
      [I] In '/home/user/WORKING_DIRECTORY' :   ALCHEMY_TARGET_CONFIG_DIR="/home/user/WORKING_DIRECTORY/products/arsdk  /native/config" ALCHEMY_TARGET_OUT="/home/user/WORKING_DIRECTORY/out/arsdk-native" ALCHEMY_TARGET_PRODUCT="arsdk" ALCHEMY_TARGET_PRODUCT_VARIANT="native" ALCHEMY_TARGET_SCAN_ADD_DIRS=" /home/user/WORKING_DIRECTORY/packages" ALCHEMY_TARGET_SCAN_PRUNE_DIRS=" /home/user/WORKING_DIRECTORY" ALCHEMY_USE_COLORS="1" ALCHEMY_WORKSPACE_DIR="/home/user/WORKING_DIRECTORY" PARROT_BUILD_PROP_GROUP="drones" PARROT_BUILD_PROP_PRODUCT="arsdk" PARROT_BUILD_PROP_PROJECT="arsdk" PARROT_BUILD_PROP_UID="arsdk-native-20190316-1404-0.0.0" PARROT_BUILD_PROP_VARIANT="native" PARROT_BUILD_PROP_VERSION="0.0.0" /home/user/WORKING_DIRECTORY/build/alchemy/scripts/alchemake -j 8 all
      ----------------------------------------------------------------------
      + ALCHEMY_WORKSPACE_DIR = /home/user /WORKING_DIRECTORY
      + TARGET_PRODUCT = arsdk
      + TARGET_PRODUCT_VARIANT = native
      + TARGET_OS = linux
      + TARGET_OS_FLAVOUR = native
      + TARGET_LIBC = native
      + TARGET_ARCH = x64
      + TARGET_CPU = 
      + TARGET_OUT = /home/user/WORKING_DIRECTORY/out/arsdk-native
      + TARGET_CONFIG_DIR = /home/user/WORKING_DIRECTORY /products/arsdk/native/config
      + TARGET_CC_PATH = /usr/bin/cc
      + TARGET_CC_VERSION = 7
      ----------------------------------------------------------------------
      Scanning /home/user/WORKING_DIRECTORY/packages for makefiles...
      Found 44 makefiles
      Prebuilt module ncurses marked as overriden
      Prebuilt module ncurses marked as overriden
      Package libavcodec was not found in the pkg-config search path.
      Perhaps you should add the directory containing 
  libavcodec.pc'
  
      to the PKG_CONFIG_PATH environment variable
  
      No package 'libavcodec' found
  
      Package libavformat was not found in the pkg-config search path.
  
      Perhaps you should add the directory containing
  libavformat.pc'
  
      to the PKG_CONFIG_PATH environment variable
  
      No package 'libavformat' found
  
      Package libswscale was not found in the pkg-config search path.
  
      Perhaps you should add the directory containing
  libswscale.pc'
  
      to the PKG_CONFIG_PATH environment variable
  
      No package 'libswscale' found
  
      Package libavutil was not found in the pkg-config search path.
  
      Perhaps you should add the directory containing
  libavutil.pc'
  
      to the PKG_CONFIG_PATH environment variable
  
      No package 'libavutil' found
  
      Package libavcodec was not found in the pkg-config search path.
  
      Perhaps you should add the directory containing
  libavcodec.pc'
  
      to the PKG_CONFIG_PATH environment variable
  
      No package 'libavcodec' found
  
      Package libavformat was not found in the pkg-config search path.
  
      Perhaps you should add the directory containing
  libavformat.pc'
  
      to the PKG_CONFIG_PATH environment variable
  
      No package 'libavformat' found
  
      Package libswscale was not found in the pkg-config search path.
  
      Perhaps you should add the directory containing
  libswscale.pc'
  
      to the PKG_CONFIG_PATH environment variable
  
      No package 'libswscale' found
  
      Package libavutil was not found in the pkg-config search path.
  
      Perhaps you should add the directory containing
  libavutil.pc'
  
      to the PKG_CONFIG_PATH environment variable
  
      No package 'libavutil' found
  
      Found 96 modules
  
      Computing modules dependencies...
  
      Checking modules dependencies...
  
      /home/user/WORKING_DIRECTORY/build/alchemy/main.mk:360 : *** /home/user    /WORKING_DIRECTORY/packages/libARDiscovery : module 'libARDiscovery'     depends on unknown module 'avahi'.  Stop.
  
      [E] Task 'build-sdk' failed (Command     failed (returncode=2))
  

  As I understand it libav has been replaced by ffmpeg but the build should still be able to reference the packages as libav. I’ve tried adding different paths to PKG_CONFIG_PATH using `export PKG_CONFIG_PATH=...’ but with no success. It is possible I’m not adding the correct path, I used ’dpkg -L ffmpeg’ to locate the package. The output of that is :

  user@TheMysteriousMachine : $ dpkg -L ffmpeg
      /.
      /etc
      /etc/ffserver.conf
      /usr
      /usr/bin
      /usr/bin/ffmpeg
      /usr/bin/ffplay
      /usr/bin/ffprobe
      /usr/bin/ffserver
      /usr/bin/qt-faststart
      /usr/share
      /usr/share/doc
      /usr/share/doc/ffmpeg
      /usr/share/doc/ffmpeg/RELEASE_NOTES
      /usr/share/doc/ffmpeg/copyright
      /usr/share/ffmpeg
      /usr/share/ffmpeg/libvpx-1080p.ffpreset
      /usr/share/ffmpeg/libvpx-1080p50_60.ffpreset
      /usr/share/ffmpeg/libvpx-360p.ffpreset
      /usr/share/ffmpeg/libvpx-720p.ffpreset
      /usr/share/ffmpeg/libvpx-720p50_60.ffpreset
      /usr/share/lintian
      /usr/share/lintian/overrides
      /usr/share/lintian/overrides/ffmpeg
      /usr/share/man
      /usr/share/man/man1
      /usr/share/man/man1/ffmpeg-all.1.gz
      /usr/share/man/man1/ffmpeg-bitstream-filters.1.gz
      /usr/share/man/man1/ffmpeg-codecs.1.gz
      /usr/share/man/man1/ffmpeg-devices.1.gz
      /usr/share/man/man1/ffmpeg-filters.1.gz
      /usr/share/man/man1/ffmpeg-formats.1.gz
      /usr/share/man/man1/ffmpeg-protocols.1.gz
      /usr/share/man/man1/ffmpeg-resampler.1.gz
      /usr/share/man/man1/ffmpeg-scaler.1.gz
      /usr/share/man/man1/ffmpeg-utils.1.gz
      /usr/share/man/man1/ffmpeg.1.gz
      /usr/share/man/man1/ffplay-all.1.gz
      /usr/share/man/man1/ffplay.1.gz
      /usr/share/man/man1/ffprobe-all.1.gz
      /usr/share/man/man1/ffprobe.1.gz
      /usr/share/man/man1/ffserver-all.1.gz
      /usr/share/man/man1/ffserver.1.gz
      /usr/share/man/man1/qt-faststart.1.gz
      /usr/share/doc/ffmpeg/changelog.Debian.gz
      

  ...of which I can assume the useful part is ’/usr/bin’ which i added to my PKG_CONFIG_PATH and still the same error when building. I am running Ubuntu 18.04 LTS. I’m at a loss and have been grinding at this for the past 2 days, any help would be GREATLY appreciated. Thank you and I’m happy to provide more needed information. As a small request, I am pretty new to Linux so if you could include as many details in command line operations as possible it would help alot.