[FFmpeg-user] Do all H264 encoders support video encryption?

[acbot at tutanota.de]

> ffmpeg -i input.mp4 -c:v copy -c:a copy -encryption_scheme cenc-aes-ctr -encryption_key 0123456789ABCDEF0123456789ABCDEF -encryption_kid 0123456789ABCDEF0123456789ABCDEF encrypted.mp4
>
> ffplay -decryption_key 0123456789ABCDEF0123456789ABCDEF -i encrypted.mp4
>
> The above two commands can achieve video encryption and playback, but trying to use other hardcoders (h264_qsv / h264_nvenc) cannot achieve playback. The commands are as follows:
>
> ffmpeg -hwaccel qsv -c:v h264_qsv -i input.mp4 -c:v h264_qsv -encryption_scheme cenc-aes-ctr -encryption_key 0123456789ABCDEF0123456789ABCDEF -encryption_kid 0123456789ABCDEF0123456789ABCDEF encrypted.mp4
>
> ffplay -decryption_key 0123456789ABCDEF0123456789ABCDEF -i encrypted.mp4
>
> ffplay -vcodec h264_qsv -decryption_key 0123456789ABCDEF0123456789ABCDEF -i encrypted.mp4
>
> --
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