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• How to decrypt AES 128 encrypted HLS stream when URI for key is "k/timestamp"

  25 janvier 2021, par Wilfred Almeida

  I have downloaded 1784 .ts files and they are AES 128 encrypted.

  


  The .m3u8 file has #EXT-X-KEY:METHOD=AES-128,URI="k/timestamp",IV=0x496daa1c6914000e408c65cead91fc29 which I guess indicates that the key must be in a file named timestamp. I got the "timestamp" file and now I want to decrypt.

  


  I tried replacing the URI with URI="file:timestamp" with all the .ts, the .m3u8 and the timestamp file all in same directory and ran the ffmpeg command

  


  ffmpeg -allowed_extensions ALL -protocol_whitelist file,tcp,crypto,http,https  -i playlist.m3u8 -c copy op.mp4

  


  but got the errors Error when loading first segment 'hls_350k_000.ts'                                  playlist.m3u8: Invalid data found when processing input even though it opened the file successfully.

  


  I tried specifying the URI as URI="http://localhost/mydir/timestamp" but got the same error as specified above. I had all .ts,.m3u8,"timestamp" file in XAMPP's htdocs folder.

  


  When I open the "timestamp" file in browser's inspect->Network->Click on file->preview, I see weird text like kf¯2“.ú¸“Á•ª   Bn5ydr/x$.9+cgKC!<ßû¢ÌNñ®jûŸŸ and it changes everytime I refresh the site.

  


  I specified the link of the file in URI and tried, same error.

  


  I tried specifying .key extension to the "timestamp" file, same error.

  


  I downloaded the "timestamp" file by entering its URL into browser which I got from inspect->Network->Click on file->Headers, I didn't download it as HAR or other stuff.

  


  I tried playing the .m3u8 file in chrome using chrome by using Native HLS Playback extension with files hosted using XAMPP but it doesn't play, video player shows loading and the chrome's console has following errors

  


  (anonymous) @ player.js:57
player.js:11 trying to recover from media Error ...
handleMediaError @ player.js:11
hls.0.12.4.min.js:1 Uncaught (in promise) DOMException: The play() request was interrupted by a new load request.
player.js:57 Player error: mediaError - fragParsingError
(anonymous) @ player.js:57
player.js:17 trying to swap Audio Codec and recover from media Error ...
handleMediaError @ player.js:17
player.js:57 Player error: mediaError - fragParsingError
(anonymous) @ player.js:57
player.js:22 cannot recover, last media error recovery failed ...
handleMediaError @ player.js:22
DevTools failed to load SourceMap: Could not load content for chrome-extension://emnphkkblegpebimobpbekeedfgemhof/hlsjs/hls.min.js.map: HTTP error: status code 404, net::ERR_UNKNOWN_URL_SCHEME


  


  I tried combining the .ts files using ffmpeg but got the same errors specified above.

  


  How do I decrypt the files and combine them into a single vlc playable file ?

  


• Video is too short in Avconv (ffmpeg) — but only when run as a crontab

  2 septembre 2016, par Dr. Paul Ruth

  I’m working on a PHP script that creates half-hour videos, combining a 30-minute MP3 with a still-frame background image, and then putting it on YouTube through the Google API. It works great except when I run it from a crontab, and I can’t figure out why.

  It uses a shell command to run the following.

  avconv -loop 1 -framerate 2 -i background.png -loglevel verbose -i audio.mp3 -c:v libx264 -preset medium -tune stillimage -vf scale=\"trunc(oh*a/2)*2:720\" -crf 18 -c:a copy -shortest -y -pix_fmt yuv420p output.mkv

  When I run it from my shell, it produces a video just as long as the 30 minute MP3. But if I run it from any kind of crontab, the result is just a fraction of the full length as it will stop at about 3 or 4 minutes.

  Typical output below for a failed result. What baffles me is that it’s not that the script is aborted, and it doesn’t seem to time out. Rather than stop, it keeps going and will upload the short, unfinished version to YouTube.

  I thought it might be a shell environment problem, missing some part of the $PATH or variables. But even when I import all the env and path settings, it does not seem to work.

  Is there some way to make sure the avconf (or ffmpeg) command continues all the way through and does not stop too early ?

  Typical output dump below from one of the times it fails : https://gist.github.com/anonymous/ecaa77037926821dba19e9db5ccb3a10

  (I used avconv because my host service claimed ffmpeg was deprecated and that I should use avconv instead. Could a library like PHP-FFMPEG be better for this ?)

• FFmpeg file not found exception, No such file or directory

  16 avril 2020, par Sagar

  I am getting the No such file or directory exception on video trimming.

  



  video path : /storage/emulated/0/Pictures/Instagram/Fast & Furious 7 - Get Low Extended Version Video.mp4

  



  file name : Fast & Furious 7 - Get Low Extended Version Video.mp4

  



  and ffmpeg searching for only Fast in/storage/emulated/0/Pictures/Instagram/Fast: No such file or directory


  



  I have found the issue, it is causing due to the file name having spaces in between them you can check in the above mentioned path and in exception.

  



  after changing the file name its working but the changing name of every file from the device it's not the right way so how can I solve this exception

  



  FAILED with output : WARNING: linker: /data/user/0/com.example.SeekBarActivity/files/ffmpeg 
has text relocations. This is wasting memory and prevents security hardening.
Please fix. FFmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers

built on Oct  7 2014 15:08:46 with gcc 4.8 (GCC)
configuration: --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-
android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --
cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-
Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 
--enable-libass --enable-libfreetype --enable-libfribidi --enable-fontconfig 
--enable-pthreads --disable-debug --disable-ffserver --enable-version3 --
enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --
enable-yasm --disable-doc --disable-shared --enable-static --pkg-
config=/home/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --
prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-
cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -
U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-
all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-
 android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-
 lpng -lexpat -lm' --extra-cxxflags=
  libavutil      54.  7.100 / 54.  7.100
  libavcodec     56.  1.100 / 56.  1.100
  libavformat    56.  4.101 / 56.  4.101
  libavdevice    56.  0.100 / 56.  0.100
  libavfilter     5.  1.100 /  5.  1.100
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  0.100 / 53.  0.100
  /storage/emulated/0/Pictures/Instagram/Fast: No such file or directory