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• avcodec/apedec : Fix several integer overflows in predictor_update_filter() and do_app...

  2 septembre 2019, par Michael Niedermayer

  avcodec/apedec : Fix several integer overflows in predictor_update_filter() and do_apply_filter()
  Fixes : negation of -2147483648 cannot be represented in type 'int' ; cast to an unsigned type to negate this value to itself
  
  Fixes : signed integer overflow : -14527961 - 2147483425 cannot be represented in type 'int'
  
  Fixes : 16380/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-5645957131141120
  
  Fixes : 16968/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-5716169901735936
  
  Fixes : 17074/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-5198710497083392
  Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/apedec.c

• ffmpeg fails : Invalid input file index : 1

  12 août 2020, par BETLOG

  I'm having trouble with an ffmpeg -filter_complex in a script that constructs the command progressively before eval-ing it.

  


  It seems to work when invoked with a single timestamp, but when i try to use multiple it fails.

  


  I'll post the script if needed, but can someone cast their eye over this and tell me if there's anything obviously wrong with the syntax please ?

  


  ffmpeg -loglevel error -hide_banner \
-i "/media/user/video/input.mp4" \
-s 1920x1080 -filter_complex \
        "[0:v]select=gte(t\,17.000),crop=in_w/2:in_h/8:0:0,drawtext=expansion=normal:text='00\:00\:17.000':x=20:y=100:box=1:fontsize=30:fontcolor=lightgreen:box=1:boxcolor=black:boxborderw=2[p0]\
        ;[0:v]select=gte(t\,19.000),crop=in_w/2:in_h/8:0:0,drawtext=expansion=normal:text='00\:00\:19.000':x=20:y=100:box=1:fontsize=30:fontcolor=lightgreen:box=1:boxcolor=black:boxborderw=2[p1]"  \
        -frames:v 1 -map [p0] \
        -y "/media/user/video/export_00:00:17.000.png"  \
        -frames:v 1 -map [p1] \
        -y "/media/user/video/export_00:00:19.000.png"  null


  


  The error is :

  


  Invalid input file index: 1.


  


• FFMpeg kills itself when restreaming http to rtmp

  22 novembre 2019, par dust19992

  We are trying to restream few stations to our Emby server (alternative to plex), but always when we start the command as provided by many cast-software it runs for some time and then it dies.

  Here is our command :

  ffmpeg -i http://URL/IP:1515/station/discoverychannel/15HD -c:a aac -b:a 96k -ar 44100 -vcodec copy -f flv rtmp://server/discoverystation/15HD

  The error is none the only exit message is :

    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  frame=33056 fps= 60 q=-1.0 Lsize=  302387kB time=00:09:11.45 bitrate=4492.0kbits/s speed=1.01x
  
  video:295223kB audio:6576kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.194924%
  
  [aac @ 0x55b6a748ee40] Qavg: 583.684
  
  Exiting normally, received signal 2 
  
  root@simpsons:~#```
  
  
  
  
  
  Our server is WOWZA media server, and we have been looking for the problem for some time now, but without any success, so we hope you guys can help us figure it out, we are trying to copy the live video as it is, and we do not want to change the encoding, or anything else, but if necessary then it has to be encoded.
  
  
  
  I have not much experience in ffmpeg but we have been using VMIX that uses ffmpeg and it's running smooth there to the server without dying, so there has to be a way to run that with the ffmpeg standalone. 
  
  
  
  Here is the WOWZA restream manual: https://www.wowza.com/docs/how-to-restream-using-ffmpeg-with-wowza-streaming-engine
  
  
  
  Thanks.