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• hey i need to download my coaching classes but they are using hls aes 128 bit encrypted streams. i downloaded m3u8 and all .ts files and found enc key

  19 mars 2023, par tinu one

  I downloaded all the .ts files using a python script but it is encrypted with aes 128.i found a encryption key (supposedly) under the network tab in developer options. I ran it through ffmpeg but got an error( invalid data found while processing ). I need these classes because they are going to remove it in may 2023. i am a noob to this and may have done step wrong. Please forgive me. I would deeply appreciate anyone who will help me find a solution to this problem. Thankyou.

  


  I downloaded all the .ts files and m3u8 file and put it inside a folder. I hosted the key file in localhost that I found under the preview tab of the network tab in developer options( it was named key/ after all and had characters which was not human readable. it also had the request URL similar to that inside the m3u8 file)because ffmpeg did not want to read the key file from my local pc. I edited the m3u8 file to access the key stored in local host and it read successfully. but it shows error( invalid data found while processing).

  


  encryption key from preview tab I found : Ø®¢Ù¦Aä [u
request url of the key : https://classes.brilliantpala.org/api/v2.5/video_contents/42475/key/

  


  unedited m3u8 file :

  


  #EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:19
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-KEY:METHOD=AES-128,URI="https://classes.brilliantpala.org/api/v2.4/encryption_key/40cd559c70c241699cfcda9072c4fb42/",IV=0x00000000000000000000000000000000
#EXTINF:11.680000,
video_0.ts
#EXTINF:10.000000,
video_1.ts
#EXTINF:10.000000,
etc etc..


  


  fetch("https://classes.brilliantpala.org/api/v2.5/video_contents/42475/key/", {
  "headers": {
    "accept": "*/*",
    "accept-language": "en-US,en;q=0.9",
    "sec-ch-ua": "\"Microsoft Edge\";v=\"111\", \"Not(A:Brand\";v=\"8\", \"Chromium\";v=\"111\"",
    "sec-ch-ua-mobile": "?0",
    "sec-ch-ua-platform": "\"Windows\"",
    "sec-fetch-dest": "empty",
    "sec-fetch-mode": "cors",
    "sec-fetch-site": "same-origin",
    "x-key": "5e5d8c5d0486a678ccd4935ecb9fa8a01b1db7327396184ab00b50573119e947"
  },
  "referrer": "https://classes.brilliantpala.org/courses/535/contents/42475/",
  "referrerPolicy": "strict-origin-when-cross-origin",
  "body": null,
  "method": "GET",
  "mode": "cors",
  "credentials": "include"
});```




  


• Issue with Batch File for FFmpeg Video Frame Extraction

  30 septembre 2023, par Claudio Martini

  Issue

  


  [swscaler @ 0000019531bb00c0] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to 'temp_frames/frame%08d.jpg':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42mp41
    encoder         : Lavf60.11.100
  Stream #0:0(eng): Video: mjpeg, yuvj420p(pc, progressive), 3840x2160 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn (default)
    Metadata:
      creation_time   : 2023-09-29T13:37:07.000000Z
      handler_name    : ?Mainconcept Video Media Handler
      vendor_id       : [0][0][0][0]
      encoder         : Lavc60.26.100 mjpeg
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
[image2 @ 000001951c61b980] Could not open file : temp_frames/frame00000001.jpg
[vost#0:0/mjpeg @ 000001951c603e80] Error submitting a packet to the muxer: I/O error
[out#0/image2 @ 000001951cb8ee80] Error muxing a packet
[out#0/image2 @ 000001951cb8ee80] video:389kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
frame=    1 fps=0.0 q=1.0 Lsize=N/A time=00:00:00.24 bitrate=N/A speed=1.03x
Conversion failed!


  


  I've noticed that using an escape code '%%' for the '%' character, as suggested for similar issues, resolves the problem :

  


  ffmpeg -i video.mp4 -qscale:v 1 -qmin 1 -qmax 1 -vsync 0 tmp_frames/frame%%08d.jpg


  


  However, the same issue occurs even when the command is used within a drag&drop batch file :

  


  setlocal enabledelayedexpansion

REM Check if an MP4 file was dragged onto the script
if "%~1"=="" (
    echo Drag an MP4 file onto this script to begin frame extraction.
    pause
    exit /b
)

REM Extract frames from the MP4 file
ffmpeg -i "%~1" -qscale:v 1 -qmin 1 -qmax 1 -vsync 0 temp_frames/frame%%08d.jpg

echo Extraction complete.
pause


  


  This is essentially the same code, but it doesn't work as expected within the batch file. Can anyone provide insight into why this issue is occurring and how to resolve it within the batch file context ?

  


• FFMPEG : How should I deal with constant corrupt packets incoming from a remote stream ? [closed]

  2 mai 2023, par 2x2

  I'll get downvoted madly fast ; I am new here, and, honestly, I'm weak at FFMPEG.

  


  I am working to "record" a test HLS broadcast (colored bars) into a local mp4 file.

  


  Trying to normally record it into the file, using a simple command, yields this result. It works fine at the start, due to the corrupt packets slowly accumulating and seemingly seamlessly getting spliced together. After, the recording simply continues, and begins to lag frequently.

  


  I'll summarize the FFMPEG log below :

  


  >! ```
>! 
>! Command input:
>! 
>! > ffmpeg -i http://IP_1:8080/udp/IP_2:1234 -c copy OUT/test1.mp4
>! 
>! ...
>! 
>! Initialization:
>! 
>! ffmpeg version 2023-04-26-git-e3143703e9-full_build-www.gyan.dev Copyright (c) 2000-2023 the FFmpeg developers
>! built with gcc 12.2.0 (Rev10, Built by MSYS2 project)
>! configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libaribcaption --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
>! libavutil      58.  6.100 / 58.  6.100
>! libavcodec     60. 10.100 / 60. 10.100
>! libavformat    60.  5.100 / 60.  5.100
>! libavdevice    60.  2.100 / 60.  2.100
>! libavfilter     9.  5.100 /  9.  5.100
>! libswscale      7.  2.100 /  7.  2.100
>! libswresample   4. 11.100 /  4. 11.100
>! libpostproc    57.  2.100 / 57.  2.100
>! 
>! ...
>! 
>! Problems begin:
>! 
>! [mpeg2video @ 000001e3f88a60c0] Invalid frame dimensions 0x0.
>! Last message repeated 4 times
>! 
>! ...
>! 
>! Repetitive two errors - Packet errors:
>! 
>! [mpegts @ 000001e3f888b300] PES packet size mismatch
>! [mpegts @ 000001e3f888b300] Packet corrupt (stream = 0, dts = 4813344832).
>! 
>! ...
>! 
>! Information:
>! 
>! Input #0, mpegts, from 'http://IP_1:8080/udp/IP_2:1234':
>! Duration: N/A, start: 53478.855478, bitrate: 3428 kb/s
>! Program 10
>! Metadata:
>! service_name    : SERVICE
>! service_provider: unknown
>! Stream #0:0[0x65]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 720x576 [SAR 16:15 DAR 4:3], 3300 kb/s, 25 fps, 25 tbr, 90k tbn
>! Side data:
>! cpb: bitrate max/min/avg: 3300000/0/0 buffer size: 1638400 vbv_delay: N/A
>! Stream #0:1[0x66](rus): Audio: mp2 ([3][0][0][0] / 0x0003), 44100 Hz, mono, fltp, 128 kb/s
>! Output #0, mp4, to 'OUT/test1.mp4':
>! Metadata:
>! encoder         : Lavf60.5.100
>! Stream #0:0: Video: mpeg2video (Main) (mp4v / 0x7634706D), yuv420p(tv, top first), 720x576 [SAR 16:15 DAR 4:3], q=2-31, 3300 kb/s, 25 fps, 25 tbr, 90k tbn
>! Side data:
>! cpb: bitrate max/min/avg: 3300000/0/0 buffer size: 1638400 vbv_delay: N/A
>! Stream #0:1(rus): Audio: mp2 (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 128 kb/s
>! Stream mapping:
>! Stream #0:0 -> #0:0 (copy)
>! Stream #0:1 -> #0:1 (copy)
>! Press [q] to stop, [?] for help
>! 
>! ```


  


  I will also attach a video demonstration of the occurrence :

  


  https://drive.google.com/file/d/13ndIpH3de3k8f3TMVGEbJUNVe-vD0vIW/view?usp=sharing

  


  Download it ; the processed web version doesn't include any of the visual glitches that are visible in the original file.

  


  I have been wanting to run FFMPEG with a minute-long delay (i.e. intentionally increasing the latency). Unfortunately, FFMPEG only has features to lower latency, not add more (I read the entire documentation trying to figure this out).

  


  Another of my ideas was to try FFPLAY (afaik it's FFMPEG but with output to a window). Didn't work, got the same errors.

  


  None of the other parameters listed in the documentation seemed to have any use to help me out ; I tried a bunch, to no avail.

  


  What will you suggest ? I would like to hear some ideas on how I could fix this.