Converting and encoding in same step without pipes

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Converting and encoding in same step without pipes

Aarthi Priya Thirumalai
Hello all,

In my current set, I am trying to encode content with ffmpeg. The ffmpeg
receives the source input through a Black Magic Declink 4K pro capture
card. Input to the capture card is a prores 4:2:2 4k60 10bit content from
Atomos Shogun device.
I want to convert my input from Prores 4K10 bit 4:2:2 to 4K10bit 4:2:0 and
directly encode through libx265/libx264 in ffmpeg in a single step instead
of doing the conversion and storing in a intermediary file and again
feeding that into ffmpeg.

I would like to know if there is a way to do this  - conversion and
encoding in a single step, without using system pipes in ffpmeg? pls let me
know your thoughts and suggestions.

regards,
Aarthi
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Re: Converting and encoding in same step without pipes

Cley Faye
2017-04-06 5:31 GMT+02:00 Aarthi Priya Thirumalai <
[hidden email]>:

> I want to convert my input from Prores 4K10 bit 4:2:2 to 4K10bit 4:2:0 and
> directly encode through libx265/libx264 in ffmpeg in a single step instead
> of doing the conversion and storing in a intermediary file and again
> feeding that into ffmpeg.
>
> I would like to know if there is a way to do this  - conversion and
> encoding in a single step, without using system pipes in ffpmeg? pls let me
> know your thoughts and suggestions.
>

‚ÄčNot sure if a filter would fit your requirements, but if you're using
pipes you're not creating intermediary files.
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Re: Converting and encoding in same step without pipes

Andy Furniss-2
In reply to this post by Aarthi Priya Thirumalai
Aarthi Priya Thirumalai wrote:

> Hello all,
>
> In my current set, I am trying to encode content with ffmpeg. The
> ffmpeg receives the source input through a Black Magic Declink 4K pro
> capture card. Input to the capture card is a prores 4:2:2 4k60 10bit
> content from Atomos Shogun device. I want to convert my input from
> Prores 4K10 bit 4:2:2 to 4K10bit 4:2:0 and directly encode through
> libx265/libx264 in ffmpeg in a single step instead of doing the
> conversion and storing in a intermediary file and again feeding that
> into ffmpeg.
>
> I would like to know if there is a way to do this  - conversion and
> encoding in a single step, without using system pipes in ffpmeg? pls
> let me know your thoughts and suggestions.

If the content is progressive then as simple as adding

-vf format=yuv420p10le

You could also consider adding flags to get slightly better psnr/ssim
though the difference is likely to be small in this case and I don't
know what ones would be best without testing a sample.
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