使用libx265转码和cenc加密的mp4，ffpay播放失败
本帖最后由 时光流逝 于 2020-10-19 10:32 编辑我在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
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 , 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
auxiliary info offset 16 greater than auxiliary info size 0
auxiliary info offset 24 greater than auxiliary info size 0
auxiliary info offset 32 greater than auxiliary info size 0
auxiliary info offset 40 greater than auxiliary info size 0
auxiliary info offset 48 greater than auxiliary info size 0
auxiliary info offset 56 greater than auxiliary info size 0
auxiliary info offset 64 greater than auxiliary info size 0
auxiliary info offset 72 greater than auxiliary info size 0
auxiliary info offset 80 greater than auxiliary info size 0
auxiliary info offset 88 greater than auxiliary info size 0
auxiliary info offset 96 greater than auxiliary info size 0
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 , 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
Stream mapping:
Stream #0:0 -> #0:0 (hevc (native) -> hevc (libx265))
Stream #0:1 -> #0:1 (copy)
Press to stop, [?] for help
x265 : HEVC encoder version 3.2
x265 : build info 8bit+10bit+12bit
x265 : using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
x265 : Main profile, Level-4 (Main tier)
x265 : Thread pool created using 4 threads
x265 : Slices : 1
x265 : frame threads / pool features : 2 / wpp(17 rows)
x265 : Coding QT: max CU size, min CU size : 64 / 8
x265 : Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 : ME / range / subpel / merge : hex / 57 / 2 / 3
x265 : Keyframe min / max / scenecut / bias: 23 / 250 / 40 / 5.00
x265 : Lookahead / bframes / badapt : 20 / 4 / 2
x265 : b-pyramid / weightp / weightb : 1 / 1 / 0
x265 : References / ref-limitcu / depth: 3 / off / on
x265 : AQ: mode / str / qg-size / cu-tree: 2 / 1.0 / 32 / 1
x265 : Rate Control / qCompress : CRF-28.0 / 0.60
x265 : tools: rd=3 psy-rd=2.00 early-skip rskip signhide tmvp b-intra
x265 : 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 , 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
更新了zeranoe发布的bin到4.3，提示的错误是
moov atom not found0
D:\test.mp4: Invalid data found when processing input
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