On 18/03/2020 14:29, Kieran O Leary wrote:
On Wed 18 Mar 2020, 12:54 Peter B., <[email protected]> wrote:
Oh, and yes: absolutely correct! Color information is gone.
Is there any way that this kind of metadata can also be transferred -
even if I don't explicitely know it's there?
I raised this before and I think you have to set the output values
manually. I found this when Transcoding from mov to mkv, colour values were
lost.
Tobias's advice here still stands I think
https://ffmpeg.org/pipermail/ffmpeg-user/2018-July/040717.html
I remember seeing this back then. I'll read it again. Thanks for
pointing it out Kieran!
The mentioned patch "Pass colour range from source to sink"
(https://ffmpeg.org/pipermail/ffmpeg-devel/2018-February/225512.html) by
Philip Langdale sounds to me like it would enable this.
Quote:
// --------------------
"However, we don't support a way to pass it through filter chains and
'ffmpeg' does not make any attempt to set it on the encoder.
This set of changes introduces a way to do this, by defining a new
filter link property, and allowing it to be set on a buffersrc and
read back from a buffersink."
// --------------------
From taking a quick peek at the related thread(s), it looks like Philip
never replied to Michael's questions/comments.
Does anyone know what happened to this idea/feature/patch?
Thanks in advance!
Peter
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