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• RuntimeException on FFmpegMediaMetaDataRetriever setDataSource (status = 0xFFFFFFFF)

  27 septembre 2017, par LaVieEnRoux

  I am attempting to load a .mp4 video from assets. I am getting the following error at the top of the stack trace if I access either via URI or FileDescriptor :

  java.lang.RuntimeException : setDataSource failed : status = 0xFFFFFFFF
  at wseemann.media.FFmpegMediaMetadataRetriever.setDataSource(Native
  Method)

  A little snippet of code that causes the exception :

  mmr = new FFmpegMediaMetadataRetriever();
  
  AssetManager assets = getAssets();
  
  AssetFileDescriptor afd = assets.openFd(TEST_VIDEO);
  
  mmr.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());

  I’m using version 1.0.14 in Android Studio. I’ve tried using either the pre-built AAR or the compile ’com.github.wseemann:FFmpegMediaMetadataRetriever:1.0.14’ link in the build.gradle dependences, and both give the same result.

  The curious thing is that this loads perfectly fine when I use MediaMetadataRetriever on the same video in place of FFmpegMediaMetadataRetriever. One of the videos with which the error was happening is available at the following link : https://drive.google.com/open?id=0B_r_uzvCTCgsS2xVMUk4TW13YUE

  Anyone have suggestions ? I’d be using MediaMetadataRetriever instead but I need to be able to grab every individual frame of the video and it doesn’t appear to be capable.

• how to synchronize multiple rtsp streams using ffmpeg (or another tool ?)

  23 janvier 2015, par user1913115

  i have several RTP/RTSP live streams that i need to capture to individual mp4 files. this is what i’m doing :

  ffmpeg -i rtsp://source1/video \
  
         -i rtsp://source2/video \
  
         -i rtsp://source3/video \
  
         -map 0 -codec copy out1.mp4 
  
         -map 1 -codec copy out2.mp4 
  
         -map 2 -codec copy out3.mp4 

  which works fine except when packets/frames are dropped, i end up with 3 files of different lengths. e.g. after an hour of capture, i may have this :

  out1.mp4 - 59m58s

  out2.mp4 - 59m30s

  out3.mp4 - 56m41s

  when looking at ffmpeg output i see this periodically :

  [NULL @ 0x7ff8c3843600] RTP: missed 8 packets
  
  [NULL @ 0x7ff8c3843600] RTP: missed 570 packets
  
  [NULL @ 0x7ff8c3843600] SEI type 81 size 672 truncated at 264

  is there a way to synchronize these videos ? i.e. if a packet is dropped on source3 to drop same packets on source1 and source2 ? or repeat last received frame as many times as required on source3 to have videos in sync with each other ?

• checkasm : Add a "run-checkasm" make target

  14 février 2024, par Martin Storsjö

  checkasm : Add a "run-checkasm" make target
  Contrary to the existing "fate-checkasm", this always prints the
  
  tool output, and runs all tests at once instead of splitting it up
  
  per target group. This is more useful when the user expects to
  
  look directly at the tool output, instead of being part of a full
  
  fate run.
  (On failure with the regular "make fate-checkasm" targets, none of
  
  the tool output is printed, but stored in files. If run with reporting
  
  set up to the FATE website, the individual failures are uploaded there,
  
  but if it is run in some sort of other CI setup, the intermediate files
  
  might not be available afterwards for inspection.)
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] tests/checkasm/Makefile