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• Error in av_write_frame when streaming over network (libavformat of ffmpeg)

  4 décembre 2014, par user4324788

  I have been using the ffmpeg libraries (libavcodec, libavformat, etc.) in my C# application to encode buffer data retrieved from my camera/microphone (using DirectShow.Net) and stream it over the network to a destination IP address using MPEG-TS and UDP.

  I communicate with the C++ libraries of ffmpeg through a C# wrapper (.dll) which I call with DllImport. I send the raw video and audio buffer data from C# to the C++ libraries for the purpose of encoding, muxing, and streaming.

  The encoding and streaming works perfectly, however I sometimes seem to encounter a problem with the “av_write_frame” function which is used to write the encoded packet to the output media. After a seemingly random period of time, the following line produces an error ("oc" being the AVFormatContext and "pkt" being the AVPacket) :

  av_write_frame(oc, &pkt)

  One of two errors occurs :

  • An I/O error is returned (return value -5).
  • A ’System.AccessViolationException’ (Attempted to read or write protected memory. This is often an indication that other memory is corrupt.) is thrown.

  This error sometimes occurs after a few minutes of streaming, other times after a much longer period (up to 20 minutes). Also, this error occurs at both video and audio encoding/writing, so I haven’t been able to pinpoint the exact reason behind this problem. Unfortunately it always results in my application either crashing or the streaming to stop working.

  I have tried catching the AccessViolationException, which sometimes allows the application to continue for a little longer, but eventually it ends up exiting without any warning.
  In case of the I/O error, I can reset my application, but eventually it still crashes.

  Any help with fixing this issue would be greatly appreciated !

  Thank you very much in advance.

• Use FFmpeg Library for Android

  5 novembre 2020, par Morteza Khodaie

  I'm using 'com.arthenica:mobile-ffmpeg-full:4.2.2.LTS' for Compress and decode Video
But I get this error in build time
enter code hereManifest merger failed : Attribute application@theme value=(@style/Theme.Test) from AndroidManifest.xml:16:9-42 is also present at [com.arthenica:mobile-ffmpeg-full:4.2.2.LTS] AndroidManifest.xml:13:9-40 value=(@style/AppTheme). Suggestion: add &#x27;tools:replace="android:theme"&#x27; to <application> element at AndroidManifest.xml:8:5-24:19 to override.</application>

  


• Python UnicodeEncodeError : 'charmap' codec can't encode when using GEOPY

  23 février 2021, par Tony Roczz

  I have been fiddling with python geopy and I tried the basic commands given in the documentation. But I am getting the UnicodeEncodeError when trying the raw command(to geolocate a query to an address and coordinates)

  



  print(location.raw)


  



  Error UnicodeEncodeError: &#x27;charmap&#x27; codec can&#x27;t encode character &#x27;\xa9&#x27; in position 83: character maps to <undefined></undefined>

  



  Then I tried the other way around (To find the address corresponding to a set of coordinates)

  



  print(location.address)    


  



  I am getting the same error UnicodeEncodeError: &#x27;charmap&#x27; codec can&#x27;t encode character &#x27;\u0101&#x27; in position 10: character maps to <undefined></undefined>

  



  I tried print((location.address).encode("utf-8")) , now am not getting any error but the output printed is like this b'NH39, Mirz\xc4\x81pur

  



  and when using print((location.raw).encode("utf-8")) I am getting error

  



  AttributeError: 'dict' object has no attribute 'encode'


  



  Can anyone tell me what is going on here and what I should do to get a proper output ?

  



  Edit :(After being marked as duplicate)

  



  Based on the solution given in this problem I am reporting on how it does not solve my problem

  



  What I wanted to know is why do I get the UnicodeEncodeError when trying out the basic sample codings given in the documentation and it did answer for that.

  



  If I want to use it an application how do I solve the error and I cannot have the application running on separate IDE or send the output to a external file since my application will function based on the output from geopy, I want the application to run in the terminal as my other applications do.