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• How do I decrypt the HLS stream to a .ts file when I have the key and IV ?

  28 décembre 2017, par A___ea_

  I have access to all the .ts files.
  My .m3u8 starts like this :

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXT-X-ALLOW-CACHE:YES
  
  #EXT-X-TARGETDURATION:13
  
  #EXT-X-KEY:METHOD=AES-128,URI="https://localserver/get_key?title_id=144", IV=0x4d1acfe1962002a4abedb8b68c65fa93
  
  #EXTINF:12.066667,
  
  1500_144_00000.ts
  
  #EXTINF:9.000000,
  
  1500_144_00001.ts
  
  EXTINF:9.000000,
  
  1500_144_00002.ts
  
  ...

  ... and the .m3u8 continues to show all the .ts files. It gives me the IV, and my Access key is f0d3321327cbaa1aa9ddba07801607442bebaad65b17ca75a15affd5

  No I’ve been searching my brain and the web for an answer on how to decrypt the .ts files (or the concatenated file) and I have seen suggestions using both openssl and ffmpeg but I can not seem to reach all the way with either tool.

  From what I’ve figured I can use the IV and Access_key to decrypt the stream using openssl. I have used the IV=4d1acfe1962002a4abedb8b68c65fa93 (removed 0x).

  I have so far tried to with the concatenated file :

  openssl aes-128-cbc -d -in concatenatedfile.ts -out decrypted_concatenatedfile.ts -nosalt -iv 4d1acfe1962002a4abedb8b68c65fa93 -K f0d3321327cbaa1aa9ddba07801607442bebaad65b17ca75a15affd5 

  But this just gives me

  bad decrypt
  
  139793444538016:error:06065064:digital envelope routines:EVP_DecryptFinal_ex:bad decrypt:evp_enc.c:539:

  I’ve seen suggestions that use a .key file and convert that to a readable format. But since I don’t have a .key file, but a ready string, I figure this is where I fail.

  I’ve tried using ffmpeg in accordance to this beautiful post by @aergistal.

  ffmpeg -i my.m3u8 -c copy output.ts

  But here too I seem to fail with my long string key.

  Any suggestions on how to proceed using openssl or ffmpeg are very welcome.

  Kindly

• ffmpeg not converting entire video in java application

  12 décembre 2017, par Urvashi Soni

  My code converts a video into different formats (160p to 2160p). The codec of video with rotate tag 90 needs to be changed. below id the code for the same which works fine for all videos till date.

  log_wfm.debug("Changing the codec video for file [" + orgFileName + "] and name of source file ["
  
                      + srcFileName + "]");
  
              String codecFlipCommand = "ffmpeg -i " + orgFileName + " -c:v libx264 -preset ultrafast " + srcFileName;
  
  
  
              log_wfm.info("Executing command to change the codec of video!");
  
              fp = Runtime.getRuntime().exec(codecFlipCommand);
  
  
  
              inputStream = new BufferedReader(new InputStreamReader(fp.getInputStream()));
  
              outputStream = new BufferedReader(new InputStreamReader(fp.getErrorStream()));
  
  
  
              StringBuffer output = new StringBuffer();
  
              String line;
  
              while ((line = inputStream.readLine()) != null) {
  
                  output.append(line).append('\n');
  
              }
  
              log_wfm.debug("stdInputForCodecChange: " + output);
  
  
  
              output = new StringBuffer();
  
              while ((line = outputStream.readLine()) != null) {
  
                  output.append(line).append('\n');
  
              }
  
              log_wfm.debug("stdErrorForCodecChange: " + output);

  now have a file of size 1.5Gb. The video does not create the file with changed codec. The file till size 848.5 MB is created and then the program hangs (with no exception or error logs)
  Please suggest some way to finish this codec change process.
  The ffmpeg command converts the video, but via java application, the process hangs
  Logs While converting via commandLine :
  

  ffmpeg version N-83433-ge87a4a8 Copyright (c) 2000-2017 the FFmpeg developers built with gcc 6.3.1 (GCC) 20161221 (Red Hat 6.3.1-1)
 configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags='-L/root/ffmpeg_build/lib -ldl' --bindir=/root/bin --pkg-config-flags=--static --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265
 libavutil      55. 46.100 / 55. 46.100
 libavcodec     57. 75.100 / 57. 75.100
 libavformat    57. 66.101 / 57. 66.101
 libavdevice    57.  2.100 / 57.  2.100
 libavfilter     6. 73.100 /  6. 73.100
 libswscale      4.  3.101 /  4.  3.101
 libswresample   2.  4.100 /  2.  4.100
 libpostproc    54.  2.100 / 54.  2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/urvashi/test/SachinSagaGameLaunchEvent.mp4':
 Metadata:
   major_brand     : mp42
   minor_version   : 0
   compatible_brands: isommp42
   creation_time   : 2017-12-07T06:26:23.000000Z
   com.android.version: 7.1.1
Duration: 00:14:16.02, start: 0.000000, bitrate: 14231 kb/s
   Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 13971 kb/s, SAR 1:1 DAR 16:9, 29.94 fps, 29.92 tbr, 90k tbn, 180k tbc (default)
   Metadata:
     rotate          : 90
     creation_time   : 2017-12-07T06:26:23.000000Z
     handler_name    : VideoHandle
   Side data:
     displaymatrix: rotation of -90.00 degrees
   Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 256 kb/s (default)
   Metadata:
     creation_time   : 2017-12-07T06:26:23.000000Z
     handler_name    : SoundHandle
[libx264 @ 0x4601a20] using SAR=1/1
[libx264 @ 0x4601a20] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x4601a20] profile Constrained Baseline, level 4.0
[libx264 @ 0x4601a20] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
Output #0, mp4, to '/home/urvashi/test/Manual_SachinSagaGameLaunchEvent.mp4':
 Metadata:
   major_brand     : mp42
   minor_version   : 0
   compatible_brands: isommp42
   com.android.version: 7.1.1
   encoder         : Lavf57.66.101
   Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1080x1920 [SAR 1:1 DAR 9:16], q=-1--1, 29.92 fps, 11488 tbn, 29.92 tbc (default)
   Metadata:
     handler_name    : VideoHandle
     creation_time   : 2017-12-07T06:26:23.000000Z
     encoder         : Lavc57.75.100 libx264
   Side data:
     cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
   Stream #0:1(eng): Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, fltp, 128 kb/s (default)
   Metadata:
     creation_time   : 2017-12-07T06:26:23.000000Z
     handler_name    : SoundHandle
     encoder         : Lavc57.75.100 aac
Stream mapping:
 Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
 Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help Past duration 0.600212 too large   48193kB time=00:00:27.26 bitrate=14479.2kbits/s speed=2.07x
Past duration 0.998863 too large
frame=25611 fps= 55 q=-1.0 Lsize= 1721466kB time=00:14:16.04 bitrate=16473.7kbits/s dup=0 drop=17 speed=1.85x
video:1707295kB audio:13453kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.041757%
[libx264 @ 0x4601a20] frame I:103   Avg QP:22.16  size:242916
[libx264 @ 0x4601a20] frame P:25508 Avg QP:25.17  size: 67557

  Thanks in Advance.

• OpenCV3.3.1 fails to read a video

  1er janvier 2018, par Kasparov92

  Here is the code I use

  file_name = 'movie.avi'
  
  cap = cv2.VideoCapture(file_name)
  
  
  
  success, frame = cap.read()
  
  
  
  i = 0
  
  
  
  while success:
  
      i +=1
  
      success, frame = cap.read()
  
  
  
  print "Frames successfully read:", i

  And I am getting this error :

  Unable to stop the stream: Inappropriate ioctl for device
  
  
  
  (python:139873): GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
  
      Frames successfully read: 0

  On this particular video, it fails to read ! I tried the same code on other videos and they work fine. I also tried the same piece of code with another laptop (same operating system : Ubuntu 16.04) and it works.

  Is it a codec issue ? if so why other videos could be loaded and read successfully ?

  EDIT 1 :

  I recompiled opencv using -DWITH_LIBV4L=ON after sudo apt-get install libv4l-dev and Now I am getting this error :

  Failed to query video capabilities: Inappropriate ioctl for device
  
  libv4l2: error getting capabilities: Inappropriate ioctl for device
  
  VIDEOIO ERROR: V4L: device /root/datasets/UCF-101/TableTennisShot/v_TableTennisShot_g22_c02.avi: Unable to query number of channels
  
  
  
  (python:173084): GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed