[FFmpeg-user] h265 file from IP camera - audio stream

Rob Hallam ffmpeg at roberthallam.com
Sun May 16 13:57:31 EEST 2021

On Sun, 16 May 2021 at 07:11, Martin Woolley <martin at woolleynet.com> wrote:

> Would you mind educating me (or helping me educate myself)? What is HXVF /
> HXVS / HXVT and is there a specification I can read covering this?

There are some potentially interesting reads searching for those terms:

 - https://spitzner.org/kkmoon.html - "Cheap Chinese camera garbled .264 files"
 - a VLC ticket: https://trac.videolan.org/vlc/ticket/22935
 - the above leads to https://gitlab.com/mbunkus/mkvtoolnix/-/issues/2146

The first and third links include workarounds to strip unwanted bumph from
the headers there, but I don't know if this also applies to your files.

Uneducated guesses are often unhelpful, but at a quick glance it seems to me
that the common element here is IP cameras. In my admittedly limited
experience they can have some odd behaviour, like being tied to Internet
Explorer / ActiveX (!!); I've heard at other times they want you to use their
own app. I'm not sure if this is a deliberate attempt at lock-in or a result of
odd tooling during development.

In any case, expecting standards-compliant behaviour from those devices
will lead to disappointment.

No doubt someone with more experience can fill in the blanks in my
amateur guesses.


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