HEVC Video Transcode Transfer VUI, SEI Information

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HEVC Video Transcode Transfer VUI, SEI Information

Ben Chang
Hi,

I was wondering if ffmpeg supports transfer of VUI and SEI info between an original bitstream and re-encoded bitstream (in a transcode scenario).

I have been digging through the documentation; the closest I can find is using -f metadata and -map_metadata but these don't seem to include the params I need.

This is specific to HDR bitstream transcode where I want to maintain information such as color_description_present_flag, colour_primaries, transfer_characteristics, etc.

Thanks,
Ben

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Re: HEVC Video Transcode Transfer VUI, SEI Information

Carl Eugen Hoyos-2
2017-02-16 23:10 GMT+01:00 Ben Chang <[hidden email]>:

> I was wondering if ffmpeg supports transfer of VUI and SEI
> info between an original bitstream and re-encoded bitstream
> (in a transcode scenario).

I suspect no hevc encoder supported by FFmpeg supports it.

> This email message is for the sole use of the intended recipient(s) and may contain
> confidential information.

Please remove this from emails sent to a public mailing list.

Carl Eugen
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Re: HEVC Video Transcode Transfer VUI, SEI Information

Ben Chang
Thanks for the prompt response Carl.

>> I suspect no hevc encoder supported by FFmpeg supports it.
Is there plan to support this? This is more relevant to decode ctx being able to pass information to encode ctx in a transcode session.

If there is no support as you mentioned, the users will have to use several commands/steps to decode, dump metadata, and pass them as encode options in subsequent encode. (eg. usecase: HDR bitstream)

>> Please remove this from emails sent to a public mailing list.
The "confidential" tag is appended automatically without my knowledge after I sent the email. I'm new the this list. How can I prevent it next time?

Thanks,
Ben

-----Original Message-----
From: ffmpeg-user [mailto:[hidden email]] On Behalf Of Carl Eugen Hoyos
Sent: Thursday, February 16, 2017 3:22 PM
To: FFmpeg user questions
Subject: Re: [FFmpeg-user] HEVC Video Transcode Transfer VUI, SEI Information

2017-02-16 23:10 GMT+01:00 Ben Chang <[hidden email]>:

> I was wondering if ffmpeg supports transfer of VUI and SEI info
> between an original bitstream and re-encoded bitstream (in a transcode
> scenario).

I suspect no hevc encoder supported by FFmpeg supports it.

> This email message is for the sole use of the intended recipient(s)
> and may contain confidential information.

Please remove this from emails sent to a public mailing list.

Carl Eugen
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Re: HEVC Video Transcode Transfer VUI, SEI Information

Carl Eugen Hoyos-2
2017-02-17 1:04 GMT+01:00 Ben Chang <[hidden email]>:

>> I suspect no hevc encoder supported by FFmpeg supports it.
>
> Is there plan to support this?

I don't know, you have to ask them.

> This is more relevant to decode ctx being able to pass
> information to encode ctx in a transcode session.
>
> If there is no support as you mentioned, the users will have to
> use several commands/steps to decode, dump metadata, and
> pass them as encode options in subsequent encode. (eg.
> usecase: HDR bitstream)

Which encoder supports encoding HDR?

Please avoid top-posting here, Carl Eugen
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Re: HEVC Video Transcode Transfer VUI, SEI Information

Ben Chang
>>> I suspect no hevc encoder supported by FFmpeg supports it.
>>
>> Is there plan to support this?
>
>I don't know, you have to ask them.

I should post in ffmpeg-devel I guess?

>Which encoder supports encoding HDR?

Any encoder that supports encoding HEVC 10bits and including metada in VUI & SEI. NVENC for example.

Thanks,
Ben


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