Re: [FFmpeg-devel] [PATCH RFC] avformat/hls: check IV size inside EXT-X-KEY

["\"zhilizhao(赵志立)\"" <quinkblack@foxmail.com>]

> On Apr 13, 2022, at 7:53 PM, Anton Khirnov <anton@khirnov.net> wrote:
> 
> Quoting Zhao Zhili (2022-04-12 10:27:50)
>> IV should always be 128 bits. If the IV attribute was truncated
>> inside EXT-X-KEY, padding on the left which is the same as when
>> using sequence number as IV.
>> ---
>> I'm not sure which method is better: do padding or just return
>> AVERROR_INVALIDDATA?
> 
> I would say return error, unless there are known buggy producers of
> incomplete IVs that we want to support.

Make sense. Actually it’s a story about shoot myself in the foot. I
created a buggy manifest, and the bug is hidden by the default
padding on the tail. So the vide only works with ffmpeg/ffplay. Let’s
hope I’m the only one make such mistake.

Will send a patch to return error in this case.

> 
> -- 
> Anton Khirnov
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