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ffmpeg - 如何处理flowplayer使用的.ts文件？

问题描述

Flowplay似乎被jove.com使用

https://www.jove.com/video/59612/3d-kinematic-gait-analysis-for-preclinical-studies-in-rodents

以上面的 URL 为例，它会使用这样的 .ts 文件（通过 Google Chrome devtools）

https://cloudflare2.jove.com/CDNSource/hls/59612/59612_3.ts

但我不确定如何使 .ts 文件在本地可见。

https://askubuntu.com/questions/3645/how-do-i-convert-ts-files-into-something-useful

我尝试过这样的事情。但我总是出错。

$ ffmpeg -i 50191_1.ts -c:v libx264 -crf 0 -c:a copy output.mp4
ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
  built with Apple LLVM version 9.1.0 (clang-902.0.39.2)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.0.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
  libavutil      56. 14.100 / 56. 14.100
  libavcodec     58. 18.100 / 58. 18.100
  libavformat    58. 12.100 / 58. 12.100
  libavdevice    58.  3.100 / 58.  3.100
  libavfilter     7. 16.100 /  7. 16.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  1.100 /  5.  1.100
  libswresample   3.  1.100 /  3.  1.100
  libpostproc    55.  1.100 / 55.  1.100
50191_1.ts: Invalid data found when processing input

有人知道如何转换 .ts 文件吗？

编辑：我得到了这样的东西。

$ cat 59612_.m3u8
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:17
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-KEY:METHOD=AES-128,URI="https://cloudflare2.jove.com/CDNSource/hls/59612/59612.key"
#EXTINF:16.683333,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_0.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_1.ts
#EXTINF:6.606600,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_2.ts
#EXTINF:16.683333,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_3.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_4.ts
#EXTINF:10.877533,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_5.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_6.ts
#EXTINF:7.907900,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_7.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_8.ts
#EXTINF:10.910900,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_9.ts
#EXTINF:9.676333,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_10.ts
#EXTINF:8.375033,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_11.ts
#EXTINF:12.645967,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_12.ts
#EXTINF:13.146467,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_13.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_14.ts
#EXTINF:6.840167,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_15.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_16.ts
#EXTINF:10.877533,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_17.ts
#EXTINF:16.683333,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_18.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_19.ts
#EXTINF:6.706700,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_20.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_21.ts
#EXTINF:16.683333,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_22.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_23.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_24.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_25.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_26.ts
#EXTINF:16.649967,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_27.ts
#EXTINF:8.308300,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_28.ts
#EXTINF:8.308300,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_29.ts
#EXTINF:5.672333,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_30.ts
#EXTINF:10.677333,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_31.ts
#EXTINF:16.683333,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_32.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_33.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_34.ts
#EXTINF:7.507500,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_35.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_36.ts
#EXTINF:16.683333,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_37.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_38.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_39.ts
#EXTINF:7.273933,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_40.ts
#EXTINF:16.683333,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_41.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_42.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_43.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_44.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_45.ts
#EXTINF:16.683333,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_46.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_47.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_48.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_49.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_50.ts
#EXTINF:16.683333,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_51.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_52.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_53.ts
#EXTINF:13.079733,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_54.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_55.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_56.ts
#EXTINF:13.113100,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_57.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_58.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_59.ts
#EXTINF:8.341667,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_60.ts
#EXTINF:6.573233,
https://cloudflare2.jove.com/CDNSource/hls/59612/59612_61.ts
#EXT-X-ENDLIST

标签： ffmpegflowplayermpeg2-ts

解决方案

#EXT-X-KEY:METHOD=AES-128,URI="https://cloudflare2.jove.com/CDNSource/hls/59612/59612.key"

This HLS videostream is encrypted. AES-128 is not DRM, so with the key present it can be decrypted.

HLS videostream

The easy way is to just open the HLS videostream with FFmpeg (which it automatically decrypts) and cut the desired segment:

ffmpeg -ss 32 -i https://cloudflare2.jove.com/CDNSource/hls/59612/59612_.m3u8 -t 17 -c copy output.mp4
  • -ss 32: skip to 32s.
  • -t 17: set duration to 17s.
  • -c copy: perform a stream-copy (no loss in quality).

Individual segment

This requires you to decrypt the segment yourself.

When you download the decryption key 59612.key, you'll see a lot of gibberish: Aæª~ý÷øŽ©ýÛO®ø.
You'll have to convert this to a hex binary representation. This can be done with hexdump...

curl -s https://cloudflare2.jove.com/CDNSource/hls/59612/59612.key | hexdump -e '16/1 "%02x"
41e61c18aa7efdf7f88ea9fddb4faef8

...or with one of my favorite tools, xidel:

xidel -s https://cloudflare2.jove.com/CDNSource/hls/59612/59612.key -e 'x:string-to-hexBinary($raw)'
41E61C18AA7EFDF7F88EA9FDDB4FAEF8

Next you can decrypt the 60th segment (for instance) with ffmpeg:

ffmpeg \
-key 41E61C18AA7EFDF7F88EA9FDDB4FAEF8 \
-iv 0000000000000000000000000000003C \
-i crypto:https://cloudflare2.jove.com/CDNSource/hls/59612/59612_60.ts \
-c copy \
output.mp4
  • -iv 0000000000000000000000000000003C: 60 (decimal) = 3C (hexa-decimal).

...or with openssl:

openssl \
aes-128-cbc \
-in <(curl -s https://cloudflare2.jove.com/CDNSource/hls/59612/59612_60.ts) \
-out 59612_60-decrypted.ts \
-d -iv 60 -K 41E61C18AA7EFDF7F88EA9FDDB4FAEF8

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