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• AWS Lambda and Fluent FFMPEG error "cannot read property "isStream" of undefined"

  29 mai 2021, par Travis Lee

  so here's the goal : convert a .webm file hosted in an S3 into a gif and upload that to a new bucket. This all works fine when run locally, but when trying to translate it into a lambda, fluent-ffmpeg throws errors when it runs the command.

  


  Here's the code snippet :

  


  ffmpeg(new URL(vid))
  .outputOptions("-vf", "scale=320:-1:flags=lanczos,fps=14")
  .on('progress', () => {
      console.log('progress');
  })
  .on('end', () => {
     //Do stuff with the result when it is done
  })
  .output(newKey)
  .run(newKey);


  


  in this snippet, "vid" is a presigned GET url for an S3 bucket containing the .webm video file, and "newKey" is the name of the new bucket (and a temporary writeStream/File that is created in the lambda to store the new .gif file until we upload it to S3 - not super relevant to this issue).

  


  What should happen (and does locally) is that a new output is created containing the converted .gif file

  


  What happens when it is deployed in a lambda is that it reaches the .outputOptions call and throws a type error saying that it cannot read property isStream of undefined.

  


  At first glance, this seems like I simply don't have FFMPEG installed in the lambda, but I do. I have tried with the prebuilt layer using NodeJS 10 found here : https://serverlessrepo.aws.amazon.com/applications/us-east-1/145266761615/ffmpeg-lambda-layer ,
with a NodeJS 12 layer that was built by some engineers here previously, and tried building a NodeJS 14 FFMPEG layer myself and using that. I tried for all three using no configuration and letting it call the PATH ffmpeg, using the FFMPEG_PATH and FFPROBE_PATH environment variables set to either what was specified in the previous layers, or what I made it in the newly built one, and even manually setting the path to the executables using the setFfmpegPath and setFfprobePath functions found on the fluent-ffmpeg object.

  


  Lastly, I even tried bundling the executables in with the actual lambda code itself and uploading it through an S3, trying all three above methods of getting it to point to the correct paths once again to no avail.

  


  I'm seriously in need of help if anyone else has encountered something similar or just might know what is going on. I'm at wit's end here trying to figure this out.

  


• What causes "double free or corruption" and "invalid pointer" in javacpp - ffmpeg ?

  7 septembre 2016, par Jiro Matchonson

  I use https://github.com/bytedeco/javacpp-presets/tree/master/ffmpeg

  <dependency>
  
        <groupid>org.bytedeco.javacpp-presets</groupid>
  
        <artifactid>ffmpeg</artifactid>
  
        <version>3.1.2-1.2</version>
  
  </dependency>

  When i am calling avformat_open_input/avformat_close_input i randomly (never at first call) get those errors :

   Error in `/usr/lib/jvm/java-8-oracle/bin/java': double free or corruption (out): 0x00007fe79c194aa0

  or

  Error in `/usr/lib/jvm/java-8-oracle/bin/java': double free or corruption (!prev): 0x00007fe51c3ffb60

  or

  Error in `/usr/lib/jvm/java-8-oracle/bin/java': double free or corruption (fasttop): 0x00007fcdc40fe4a0

  I cant find out how to solve this, please help.

  There is my implementation :

      private static void registerComponents() {
  
          if (!componentsRegistered) {
  
              componentsRegistered = true;
  
              av_register_all();
  
          }
  
      }
  
  
  
      public static void decodeFrame(ByteBuffer frameData) {
  
          registerComponents();
  
  
  
          AVFormatContext pFormatCtx = avformat_alloc_context();
  
          int i, videoStream;
  
          AVCodecContext pCodecCtx = null;
  
          AVCodec pCodec = null;
  
          AVFrame pFrame = null;
  
          AVFrame pFrameRGB = null;
  
  
  
          int[] frameFinished = new int[1];
  
          int numBytes;
  
          BytePointer buffer = null;
  
  
  
          AVDictionary    optionsDict = null;
  
          SwsContext      sws_ctx = null;
  
  
  
          AVIOContext ioContext = avio_alloc_context(new BytePointer(frameData), frameData.capacity(), 0, null, null, null, null);
  
          pFormatCtx.pb(ioContext);
  
  
  
          if (avformat_open_input(pFormatCtx, "", null, null) < 0) {
  
              logger.error(MarkerFactory.getMarker("ffmpeg"), "Problem with load video from memory.");
  
              return;
  
          }
  
  
  
         avformat_close_input(pFormatCtx);       
  
      }

• Revision 3643544fe0 : Merge "Reverting "Adds support for reading and writing 10/12-bit y4m" for now be

  3 juillet 2014, par Dmitry Kovalev

  Changed Paths :
   Modify /vpxdec.c

  
  
  Merge "Reverting "Adds support for reading and writing 10/12-bit y4m" for now
  because of Mac Build Failure."