> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Thu, 28 May 2015 10:18:45 +
> Subject: Re: [FFmpeg-user] HD > SD Down-Convert Prores Color
>
> Kevin Wells hotmail.co.uk> writes:
>
> > Actually all my input files are 8 bit, so perhaps this
>
Kevin Wells hotmail.co.uk> writes:
> Actually all my input files are 8 bit, so perhaps this
> is the issue? Can I force ffmpeg to read my input
> Prores file as 8 bit?
Prores is always ten bit, never eight bit.
Carl Eugen
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> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Tue, 26 May 2015 21:10:47 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> Kevin Wells hotmail.co.uk> writes:
>
>>> (My questi
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Tue, 26 May 2015 21:10:47 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> Kevin Wells hotmail.co.uk> writes:
>
>>> (My questi
Kevin Wells hotmail.co.uk> writes:
> QTInput("HD_BARS.mov", quality=100, audio=2)
> ColorMatrix(mode="Rec.709->Rec.601", clamp=0)
> Spline36Resize(720, 576)
I don't know anything about Avisynth but what
makes you think that it uses 10bit?
Especially since it apparently uses the exact
same code
Kevin Wells hotmail.co.uk> writes:
> > (My question was why you are inserting yuvy422 colourspace.)
>
> Using that in my command line gave me the closest
> conversion I could achieve, now I know why it wasn't
> perfect, no colormatrix 10 bit support!
Since yuyv422 is eight bit, 10bit colormat
> From: kevwe...@hotmail.co.uk
> To: ffmpeg-user@ffmpeg.org
> Date: Tue, 26 May 2015 18:44:48 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
>
>> To: ffmpeg-us
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Tue, 26 May 2015 16:37:24 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
> Unfortunately, the colormatrix filter only works with eight bit, so
>
Kevin Wells hotmail.co.uk> writes:
> HD_BARS.mov -s pal -vcodec prores -profile 3 -vtag apch -an
> -movflags +write_colr -an -s pal
> -color_primaries smpte170m -colorspace bt470bg out.mov
> BUT the output is still wrong, much too bright.
I tested the following and the output is less bright af
> From: kevwe...@hotmail.co.uk
> To: ffmpeg-user@ffmpeg.org
> Date: Fri, 22 May 2015 11:16:42 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
>
>> To: ffmpeg-us
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Thu, 21 May 2015 10:56:58 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> Kevin Wells hotmail.co.uk> writes:
>
>> Stream #0:0(eng):
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Thu, 21 May 2015 10:56:58 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> Kevin Wells hotmail.co.uk> writes:
>
>> Stream #0:0(eng):
Kevin Wells hotmail.co.uk> writes:
> Stream #0:0(eng): Video: prores (apch / 0x68637061),
> yuv422p10le(bt470bg/smpte170m
Did you try to pass this to your encoding command?
(You need git pull or use smpte170m twice.)
Carl Eugen
___
ffmpeg-user m
> From: kevwe...@hotmail.co.uk
> To: ffmpeg-user@ffmpeg.org
> Date: Wed, 20 May 2015 15:19:30 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
>
>> To: ffmpeg-us
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Wed, 20 May 2015 14:58:19 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> Kevin Wells hotmail.co.uk> writes:
>
>> the out.mov is still
Kevin Wells hotmail.co.uk> writes:
> the out.mov is still flagged as bt709, but needs to be bt601.
Do you have a file (any file) that is flagged as bt601?
If not, how do you know that it is possible to flag the
file as bt601 (I also believe it is possible but I will
only be able to help you if
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Wed, 20 May 2015 13:05:23 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> Kevin Wells hotmail.co.uk> writes:
>
>> Hi Carl, what should
Kevin Wells hotmail.co.uk> writes:
> Hi Carl, what should I change to make the output bt601?
Please provide such a bt601 sample (including ffmpeg -i
output for the sample).
Carl Eugen
>
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> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Tue, 19 May 2015 19:44:37 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> Kevin Wells hotmail.co.uk> writes:
>
>> Hi Carl, what should
From: kevwe...@hotmail.co.uk
To: ffmpeg-user@ffmpeg.org
Date: Mon, 18 May 2015 11:50:20 +
Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.
Kevin Wells hotmail.co.uk> writes:
> Hi Carl, what should I change to make the output bt601?
Please provide such a sample (including ffmpeg -i output
for the sample).
Carl Eugen
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From: kevwe...@hotmail.co.uk
To: ffmpeg-user@ffmpeg.org
Date: Mon, 18 May 2015 11:50:20 +
Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.
Kevin Wells hotmail.co.uk> writes:
> This does not suffer from the issue, but the colours look slightly off
>
> ffmpeg -i /Users/kev/Movies/HD_BARS.mov -vf scale=720:576
> -vcodec v210 -an out.mov
Please test the following, sorry for not realising this earlier:
$ ffmpeg -i HD_BARS.mov -s pal -
Kevin Wells hotmail.co.uk> writes:
> Hmm, on second thoughts, i'm not so sure. Is this
> the same sort of differences your seeing Carl?
No because you see two kinds of output (2+2) while
I see three identical outputs and one different.
Please also test with vanilla 10.10.3 if possible.
Carl
Hi Carl, I am on 10.10.3, but with FCP installed. I open all 4 movs up in QT
player 10 and took a screen grab of all 4 lined up. There is a slight but
acceptable difference between out1 and out3 and the original HD, but it's what
I would expect on converting between different compressions. Out2
Kevin Wells hotmail.co.uk> writes:
> >>> $ ffmpeg -i HD_BARS.mov -an -vcodec copy out1.mov
> >>> $ ffmpeg -i HD_BARS.mov -an -vcodec v210 out2.mov
> >>> $ ffmpeg -i HD_BARS.mov -an -vcodec prores out3.mov
> I checked on fcp video scopes and also QuickTime player,
> and they are exactly the same
> On 16 May 2015, at 09:45, "Carl Eugen Hoyos" wrote:
>
> Kevin Wells hotmail.co.uk> writes:
>
>>> $ ffmpeg -i HD_BARS.mov -an -vcodec copy out1.mov
>>> $ ffmpeg -i HD_BARS.mov -an -vcodec v210 out2.mov
>>> $ ffmpeg -i HD_BARS.mov -an -vcodec prores out3.mov
>
>> Hi Carl, I can confirm that a
Kevin Wells hotmail.co.uk> writes:
> > $ ffmpeg -i HD_BARS.mov -an -vcodec copy out1.mov
> > $ ffmpeg -i HD_BARS.mov -an -vcodec v210 out2.mov
> > $ ffmpeg -i HD_BARS.mov -an -vcodec prores out3.mov
> Hi Carl, I can confirm that all of these three tests
> produce a perfect replication of the or
> From: kevwe...@hotmail.co.uk
> To: ffmpeg-user@ffmpeg.org
> Date: Thu, 14 May 2015 18:56:12 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
>
>> To: ffmpeg-us
> Date: Fri, 15 May 2015 15:04:54 +0100
> From: kevin.j.wheat...@gmail.com
> To: ffmpeg-user@ffmpeg.org
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> I should have paid more attention to your command line, in that
I should have paid more attention to your command line, in that case
you are going between the same pixel format and I'm not sure that the
use of the scalar for converting between different colour difference
encodings will actually do anything as I believe it only considers
using the matrices if th
> Date: Fri, 15 May 2015 09:39:00 +0100
> From: kevin.j.wheat...@gmail.com
> To: ffmpeg-user@ffmpeg.org
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> On Thu, May 14, 2015 at 4:49 PM, Kevin Wells wrote:
>> H
On Thu, May 14, 2015 at 4:49 PM, Kevin Wells wrote:
> Hi Kevin, what would be your suggestion for a possible work-around?
you can control the conversion ffmpeg adds automatically by using an
explicit "-vf scale=out_color_matrix=bt709" when going from RGB to
YCbCr substitute what you need for the
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Thu, 14 May 2015 16:26:53 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> Kevin Wells hotmail.co.uk> writes:
>
>> This does not suffe
Kevin Wells hotmail.co.uk> writes:
> This does not suffer from the issue, but the colours
> look slightly off, I have attached screen grabs.
Could you confirm that the issue you see is
reproducible with all following command line
indicating this is not a problem with the
software scaler eith
> Date: Thu, 14 May 2015 16:33:53 +0100
> From: kevin.j.wheat...@gmail.com
> To: ffmpeg-user@ffmpeg.org
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> In case nobody realises, the colour differences you are showin
In case nobody realises, the colour differences you are showing, look
like a miss match between the encoding matrix and the decoding matrix
used to perform the RGB<->YCbCr conversion, like it is encoded with BT
709 and decoded with 601.
Kevin
___
ffmpeg-
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Thu, 14 May 2015 12:44:10 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> Kevin Wells hotmail.co.uk> writes:
>
>> This does not suffe
Kevin Wells hotmail.co.uk> writes:
> This does not suffer from the issue, but the colours
> look slightly off, I have attached screen grabs.
How did you produce them, I cannot reproduce?
> ffmpeg -i /Users/kev/Movies/HD_BARS.mov
> -vf scale=720:576 -vcodec v210 -an out.mov
I tested the follo
Kevin Wells hotmail.co.uk> writes:
> > What about the following?
> > $ ffmpeg -i HD_Source.mov -vf scale=720:576 -vcodec v210 -an out.mov
> This does not suffer from the issue, but
> the colours look slightly off, I have
> attached screen grabs.
Please provide one frame of HD_BARS.mov
Carl E
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Wed, 13 May 2015 20:47:03 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> Please provide one frame of HD_BA
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Wed, 13 May 2015 20:27:48 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> What about the following?
> $ ffmpeg -i HD_Source.mov -vf scale=720:576
Kevin Wells hotmail.co.uk> writes:
> This file is fine:
>
> ffmpeg -f lavfi -i color=s=pal -t 10 -vcodec v210 out.mov
What about the following?
$ ffmpeg -i HD_Source.mov -vf scale=720:576 -vcodec v210 -an out.mov
Carl Eugen
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> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Wed, 13 May 2015 19:50:05 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> What about the following?
> $ ffmpeg -f lavfi -i color=s=pal -vcodec v21
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Wed, 13 May 2015 19:50:05 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> Do you have a v210 file that is more &quo
Kevin Wells hotmail.co.uk> writes:
> > Please test with -vcodec v210
> Hi Carl, this produces the same incorrect result.
Do you have a v210 file that is more "correct"?
> Whats the next step?
What about the following?
$ ffmpeg -f lavfi -i color=s=pal -vcodec v210 out.mov
Carl Eugen
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Wed, 13 May 2015 17:40:24 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> Kevin Wells hotmail.co.uk> writes:
>
>> Hi Carl, i'm out of examples I can send you
>
> P
Kevin Wells hotmail.co.uk> writes:
> Hi Carl, i'm out of examples I can send you
Please test with -vcodec v210
Carl Eugen
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> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Wed, 13 May 2015 16:23:15 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> Kevin Wells hotmail.co.uk> writes:
>
>> Stream #0:0(eng): Vi
Kevin Wells hotmail.co.uk> writes:
> Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p
Your x264 version does not support 10bit, so this is
a useless comparison.
Carl Eugen
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> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Wed, 13 May 2015 11:13:31 +
> Subject: Re: [FFmpeg-user] HD> SD Down-Convert Prores Color
>
> Is encoding with prores needed to reproduce the issue,
> or are only seeing a problem with the software scaler?
Kevin Wells hotmail.co.uk> writes:
> what platform are you using, Windows, Mac?
I suggest one more guess.
(But it doesn't matter: FFmpeg runs fine on Windows
and Mac, I test regularly myself.)
> In any application if you open the video and turn the
> gamma up you will see big problems.
FFmpeg
Carl Eugen Hoyos ag.or.at> writes:
> The luminance of the files is very similar.
And the chrominance values are also only off-by-one,
so I don't see much difference.
> Are you reporting different chrominance values
> for zero luminance?
Sorry, please ignore.
Carl Eugen
Kevin Wells hotmail.co.uk> writes:
> Hi Carl, Is everything OK with my instructions on
> how to reproduce this issue?
No, FCP is not exactly a requirement for FFmpeg development.
I tested the following:
$ ffmpeg -i HD_Source.mov
-vf colormatrix=bt709:bt601,scale=720:576:flags=lanczos
-vcodec
> > To: ffmpeg-user@ffmpeg.org
> > From: ceho...@ag.or.at
> > Date: Sun, 10 May 2015 14:27:29 +
> > Subject: Re: [FFmpeg-user] HD > SD Down-Convert Prores Color
> >
> > Kevin Wells hotmail.co.uk> writes:
> >
> > > if I emit the forma
From: kevwe...@hotmail.co.uk
To: ffmpeg-user@ffmpeg.org
Date: Sun, 10 May 2015 18:23:10 +
Subject: Re: [FFmpeg-user] HD > SD Down-Convert Prores Color
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Sun, 10 May 2015 14:27:29 +
> Subject: Re: [FFmpeg-use
Kevin Wells hotmail.co.uk> writes:
> -vcodec prores_ks
Is the issue you see also reproducible with -vcodec prores?
Carl Eugen
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On 5/10/2015 7:43 AM, Carl Eugen Hoyos wrote:
James Heliker gmail.com> writes:
I didn't know you could encode Apple Prores with FFmpeg.
Since 2011.
Thanks Carl!
I need to get out and rtfm more, sorry.
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James Heliker gmail.com> writes:
> I didn't know you could encode Apple Prores with FFmpeg.
Since 2011.
> If that is possible I too would like to know how!
$ ffmpeg -i input -vcodec prores -an out.mov
Carl Eugen
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Kevin Wells hotmail.co.uk> writes:
> if I emit the format=uyvy422 then the output file
> contains tiny green artefacts
How can I reproduce this?
Thank you, Carl Eugen
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On May 9, 2015, at 1:54 PM, Kevin Wells wrote:
>>> -vf format=uyvy422,colormatrix=bt709:bt601,scale=720:576:flags=lanczos
>>
>> This can't be correct unless you know (tested)
>> something I don't know (didn't test).
>
> This is the closest I can get, if I emit the format=uyvy422 then the outpu
> > -vf format=uyvy422,colormatrix=bt709:bt601,scale=720:576:flags=lanczos
>
> This can't be correct unless you know (tested)
> something I don't know (didn't test).
This is the closest I can get, if I emit the format=uyvy422 then the output
file contains tiny green artefacts (easily visible my
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Sat, 9 May 2015 13:11:26 +
> Subject: Re: [FFmpeg-user] HD > SD Down-Convert Prores Color
>
> Kevin Wells hotmail.co.uk> writes:
>
> > I would like all audio tracks and the subtitle
> > tr
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Sat, 9 May 2015 13:11:26 +
> Subject: Re: [FFmpeg-user] HD > SD Down-Convert Prores Color
>
> Kevin Wells hotmail.co.uk> writes:
>
> > I would like all audio tracks and the subtitle
> > tr
Kevin Wells hotmail.co.uk> writes:
> I would like all audio tracks and the subtitle
> track enabled.
You have to patch the source to do that.
(libavformat/movenc.c)
> -vf format=uyvy422 ... -pix_fmt yuv422p10le
This can't be correct unless you know (tested)
something I don't know (didn't tes
Hi, I am doing a down-convert from HD Prores HQ to SD Prores HQ and am
unsure I am doing it correctly, retaining / converting the correct color
spaces. Is the below command correct? Also the output file only has one
audio track enabled and also the timecode track is not enabled. I would
like all au
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