使用libx265转码和cenc加密的mp4，ffpay播放失败

时光流逝

我在ubuntu下编译了ffmpeg 4.2， configure参数 --enable-libx264 --enable-libx265 --enable-gpl --enable-shared --enable-pthreads。做了以下测试：
(1)
h264转码并使用cenc加密
        ffmpeg -i input -vcodec libx264 -acodec copy  -encryption_scheme cenc-aes-ctr -encryption_key xxxxxxxxx -encryption_kid xxxxxxxxx output.mp4
之后在windows下使用zeranoe提供的bin播放
        ffplay -i output.mp4 -decryption_key xxxxxxxxx
这样是可以成功播放的，去掉解密参数播放失败，说明cenc是生效的。
(2)
h265转码
         ffmpeg -i input -vcodec libx265 -acodec copy output.mp4
cenc加密
         ffmpeg -i output.mp4 -c copy -encryption_scheme cenc-aes-ctr -encryption_key xxxxxxxxx -encryption_kid xxxxxxxxx output_encrypted.mp4

之后在windows下播放

        ffplay -i output_encrypted.mp4 -decryption_key xxxxxxxxx

可以正常播放。

(3)

h265转码并使用cenc加密

        ffmpeg -i input -vcodec libx265 -acodec copy  -encryption_scheme cenc-aes-ctr -encryption_key xxxxxxxxx -encryption_kid xxxxxxxxx output.mp4

之后在windows下播放

        ffplay -i output.mp4 -decryption_key xxxxxxxxx

播放失败。

ffplay打印的log信息如下：

  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 03074640] failed to read iv from the auxiliary info
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\test.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2mp41
    encoder         : Lavf58.29.100
  Duration: 00:00:10.09, bitrate: 884 kb/s
    Stream #0:0(und): Video: hevc (Main) (hev1 / 0x31766568), yuv420p(tv, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 743 kb/s, 23 fps, 23 tbr, 11776 tbn, 23 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 130 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
auxiliary info offset 8 greater than auxiliary info size 0d=   0 aq=    0KB vq=    0KB sq=    0B f=0/0
[mov,mp4,m4a,3gp,3g2,mj2 @ 030857a0] auxiliary info offset 16 greater than auxiliary info size 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 030857a0] auxiliary info offset 24 greater than auxiliary info size 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 030857a0] auxiliary info offset 32 greater than auxiliary info size 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 030857a0] auxiliary info offset 40 greater than auxiliary info size 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 030857a0] auxiliary info offset 48 greater than auxiliary info size 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 030857a0] auxiliary info offset 56 greater than auxiliary info size 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 030857a0] auxiliary info offset 64 greater than auxiliary info size 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 030857a0] auxiliary info offset 72 greater than auxiliary info size 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 030857a0] auxiliary info offset 80 greater than auxiliary info size 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 030857a0] auxiliary info offset 88 greater than auxiliary info size 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 030857a0] auxiliary info offset 96 greater than auxiliary info size 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 030857a0] auxiliary info offset 104 greater than auxiliary info size 0
......

这里不明白为什么会 failed to read iv from the auxiliary info，之后auxiliary info就一直是报错状态。

我在ffmpeg里打log，看了下movenccenc的处理流程，auxiliary info的alloc和write都没有报错

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/mnt/d/test_h265.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2mp41
    encoder         : Lavf58.29.100
  Duration: 00:00:10.09, start: 0.000000, bitrate: 1219 kb/s
    Stream #0:0(und): Video: hevc (Main) (hev1 / 0x31766568), yuv420p(tv, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 1081 kb/s, 23 fps, 23 tbr, 11776 tbn, 23 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 130 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
File '/mnt/d/test.mp4' already exists. Overwrite ? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (hevc (native) -> hevc (libx265))
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
x265 [info]: HEVC encoder version 3.2
x265 [info]: build info [Linux][GCC 9.3.0][64 bit] 8bit+10bit+12bit
x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
x265 [info]: Main profile, Level-4 (Main tier)
x265 [info]: Thread pool created using 4 threads
x265 [info]: Slices                              : 1
x265 [info]: frame threads / pool features       : 2 / wpp(17 rows)
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 [info]: ME / range / subpel / merge         : hex / 57 / 2 / 3
x265 [info]: Keyframe min / max / scenecut / bias: 23 / 250 / 40 / 5.00
x265 [info]: Lookahead / bframes / badapt        : 20 / 4 / 2
x265 [info]: b-pyramid / weightp / weightb       : 1 / 1 / 0
x265 [info]: References / ref-limit  cu / depth  : 3 / off / on
x265 [info]: AQ: mode / str / qg-size / cu-tree  : 2 / 1.0 / 32 / 1
x265 [info]: Rate Control / qCompress            : CRF-28.0 / 0.60
x265 [info]: tools: rd=3 psy-rd=2.00 early-skip rskip signhide tmvp b-intra
x265 [info]: tools: strong-intra-smoothing lslices=6 deblock sao
----------->ff_mov_cenc_init
    Last message repeated 1 times
Output #0, mp4, to '/mnt/d/test.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2mp41
    encoder         : Lavf58.29.100
    Stream #0:0(und): Video: hevc (libx265) (hev1 / 0x31766568), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 23 fps, 11776 tbn, 23 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc58.54.100 libx265
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 130 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
----------->ff_mov_cenc_write_packet
----------->mov_cenc_start_packet
----------->auxiliary_info_write
----------->auxiliary_info_add_subsample
----------->mov_cenc_write_encrypted
----------->mov_cenc_end_packet
----------->ff_mov_cenc_write_packet
----------->mov_cenc_start_packet
----------->auxiliary_info_write
----------->auxiliary_info_add_subsample
----------->mov_cenc_write_encrypted
----------->mov_cenc_end_packet
......

encryption_kid这个参数的意义不是太理解，看文档感觉是一个描述id么？我在libx264时改动这个参数并不影响解密播放，没有搞清楚是不我在编码和加密指令上用错了参数或是libx265的问题导致的解密播放失败，麻烦各位大佬给看看，谢谢

时光流逝

更新了zeranoe发布的bin到4.3，提示的错误是
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001f146d14c00] moov atom not found0
D:\test.mp4: Invalid data found when processing input