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• avformat/hls : Be more picky on extensions

  16 janvier, par Michael Niedermayer

  avformat/hls : Be more picky on extensions
  This blocks disallowed extensions from probing
  
  It also requires all available segments to have matching extensions to the format
  
  mpegts is treated independent of the extension
  It is recommended to set the whitelists correctly
  
  instead of depending on extensions, but this should help a bit,
  
  and this is easier to backport
  Fixes : CVE-2023-6602 II. HLS Force TTY Demuxer
  
  Fixes : CVE-2023-6602 IV. HLS XBIN Demuxer DoS Amplification
  The other parts of CVE-2023-6602 have been fixed by prior commits
  Found-by : Harvey Phillips of Amazon Element55 (element55)
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] doc/demuxers.texi
  • [DH] libavformat/hls.c

• How to solve issue for converting ismv file of h264 video codec and aac audio codec ?

  4 octobre 2013, par Priyal

  I want to convert transmux ismv file to mp4 format. ISMV file is encoded withe the following ffmpeg detail :

     Metadata:
  
     major_brand     : isml
  
     minor_version   : 1
  
     compatible_brands: piffiso2
  
     creation_time   : 2013-10-03 14:10:41
  
     Duration: 15:21:13.16, start: 0.000000, bitrate: 41 kb/s
  
     Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 64
  
                       kb/s (default)
  
     Metadata:
  
     creation_time   : 2013-10-03 14:10:41
  
     handler_name    : Audio
  
     Stream #0:1(und): Video: h264 (avc1 / 0x31637661), 1280x720, 3217 kb/s, 29.9
  
                       7 tbr, 10000k tbn, 20000k tbc (default)
  
  Metadata:
  
     creation_time   : 2013-10-03 14:10:41
  
     handler_name    : Video
  
     Stream #0:2(und): Data: none (dfxp / 0x70786664), 32 kb/s (default)
  
     Metadata:
  
     creation_time   : 2013-10-03 14:10:41
  
     handler_name    : Text

  I used the following ffmpeg command to transmux :

   ffmpeg -y -ss 00:00:10 -i Encoder1.ismv -vcodec libx264 -ar 44100 -t 40 -preset slow -qp 0  
  
   Encoder.mp4

  I got output as :

   ffmpeg version N-56010-g54d628a Copyright (c) 2000-2013 the FFmpeg developers
  
   built on Sep  4 2013 00:44:27 with gcc 4.7.3 (GCC)
  
   configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
   isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
   le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
   e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
   ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
   ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
   eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
  
   amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
  
   enable-libxvid --enable-zlib
  
       libavutil      52. 43.100 / 52. 43.100
  
       libavcodec     55. 31.100 / 55. 31.100
  
       libavformat    55. 16.100 / 55. 16.100
  
       libavdevice    55.  3.100 / 55.  3.100
  
       libavfilter     3. 83.102 /  3. 83.102
  
       libswscale      2.  5.100 /  2.  5.100
  
       libswresample   0. 17.103 /  0. 17.103
  
       libpostproc    52.  3.100 / 52.  3.100
  
   [aac @ 040f1ba0] TYPE_FIL: Input buffer exhausted before END element found
  
   [h264 @ 00353120] AVC: nal size -729776398
  
   [h264 @ 00353120] no frame!
  
   [h264 @ 00353120] AVC: nal size -570515285
  
   [h264 @ 00353120] no frame!
  
   [h264 @ 00353120] AVC: nal size -1477874754
  
   [h264 @ 00353120] no frame!
  
   [h264 @ 00353120] AVC: nal size -712314563
  
   [h264 @ 00353120] no frame!
  
   [h264 @ 00353120] AVC: nal size -23151524
  
   [h264 @ 00353120] no frame!
  
   [h264 @ 00353120] AVC: nal size -592499201
  
   [h264 @ 00353120] no frame!
  
   [h264 @ 00353120] AVC: nal size 225768173
  
   [h264 @ 00353120] no frame!
  
   [h264 @ 00353120] AVC: nal size 698187359
  
   [h264 @ 00353120] AVC: nal size 635127544
  
   [h264 @ 00353120] no frame!
  
   [h264 @ 00353120] AVC: nal size -1242688339
  
   [h264 @ 00353120] AVC: nal size 269543071
  
   [h264 @ 00353120] no frame!
  
   [mov,mp4,m4a,3gp,3g2,mj2 @ 0035e840] decoding for stream 1 failed
  
   [mov,mp4,m4a,3gp,3g2,mj2 @ 0035e840] Could not find codec parameters for stream
  
    1 (Video: h264 (avc1 / 0x31637661), 1280x720, 3217 kb/s): unspecified pixel form
  
    at Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\inetpub\media\archives\DEFAULT WEB S
  
    ITE\PushToPUblishPoint\Eagan_12034_Soccer_3-10-2013_14_10_19-isml\2013-10-03-14-
  
    10-35-436\Segment001\Encoder1.ismv':
  
     Metadata:
  
     major_brand     : isml
  
     minor_version   : 1
  
     compatible_brands: piffiso2
  
     creation_time   : 2013-10-03 14:10:41
  
     Duration: 15:21:13.16, start: 0.000000, bitrate: 41 kb/s
  
     Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 64
  
                       kb/s (default)
  
      Metadata:
  
     creation_time   : 2013-10-03 14:10:41
  
     handler_name    : Audio
  
     Stream #0:1(und): Video: h264 (avc1 / 0x31637661), 1280x720, 3217 kb/s, 29.9
  
                       7 tbr, 10000k tbn, 20000k tbc (default)
  
     Metadata:
  
     creation_time   : 2013-10-03 14:10:41
  
     handler_name    : Video
  
     Stream #0:2(und): Data: none (dfxp / 0x70786664), 32 kb/s (default)
  
     Metadata:
  
     creation_time   : 2013-10-03 14:10:41
  
     handler_name    : Text
  
  
  
   [buffer @ 04679480] Unable to parse option value "-1" as pixel format
  
                 Last message repeated 1 times
  
   [buffer @ 04679480] Error setting option pix_fmt to value -1.
  
   [graph 0 input from stream 0:1 @ 040f7380] Error applying options to the filter.
  
  
  
   Error opening filters!

  Please suggest the solution for Windows OS

• how can I set GOP size to be a multiple of the input framerate ?

  3 septembre 2020, par agconti

  Question :

  


  How can I set GOP size to be a multiple of the input framerate ?

  


  Context :

  


  My ideal GOP size formula is source_fps * 2. My source's framerate can be either 30 or 60 fps so I'm unable to set a static value that works for both. Is there a variable that ffmpeg exposes that I can use ? I know you can get metadata about the source input when using the -vf option with variables like iw or ih. Is there a similar method for FPS ?

  


  Example command where GOP size and keyint_min is hardcoded :

  


  ffmpeg -i <input /> -keyint_min 120 -g 120 -f dash /path/to/out.mpd&#xA;

  


  Desired command where e GOP size and keyint_min are based on the source framerate :

  


  ffmpeg -i <input /> -keyint_min source_framerate * 2 -g source_framerate * 2 -f dash /path/to/out.mpd&#xA;