uncompressed RGB within MXF

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uncompressed RGB within MXF

Kieran O Leary
Hi,

I see that uncompressed RGB is not supported within MXF. I know that
Resolve can create 10-bit RGB but only at HD resolution. I didn't see
anything relating to uncompressed RGB in the UL list in mxfenc.c and I
don't have an SMPTE account to get beyond the Paywall that would let
me know what RGB pixel formats are possible within MXF in a general
sense.

I'm assuming that there isn't some option that I'm missing out on
here, it just isn't supported?

$ ./ffmpeg -f lavfi -i testsrc -pix_fmt gbrp10le -c:v copy out.mxf
ffmpeg version N-92260-g3cc3cb663b Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.3.0-27ubuntu1~18.04)
  configuration:
  libavutil      56. 20.100 / 56. 20.100
  libavcodec     58. 33.102 / 58. 33.102
  libavformat    58. 19.102 / 58. 19.102
  libavdevice    58.  4.106 / 58.  4.106
  libavfilter     7. 37.100 /  7. 37.100
  libswscale      5.  2.100 /  5.  2.100
  libswresample   3.  2.100 /  3.  2.100
Input #0, lavfi, from 'testsrc':
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24,
320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
[mxf @ 0x56227a627880] track 0: could not find essence container ul,
codec not currently supported in container
Could not write header for output file #0 (incorrect codec parameters
?): Operation not permitted
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
    Last message repeated 1 times

Best,

Kieran.
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Re: uncompressed RGB within MXF

Paul B Mahol
On 10/24/18, Kieran O Leary <[hidden email]> wrote:

> Hi,
>
> I see that uncompressed RGB is not supported within MXF. I know that
> Resolve can create 10-bit RGB but only at HD resolution. I didn't see
> anything relating to uncompressed RGB in the UL list in mxfenc.c and I
> don't have an SMPTE account to get beyond the Paywall that would let
> me know what RGB pixel formats are possible within MXF in a general
> sense.
>
> I'm assuming that there isn't some option that I'm missing out on
> here, it just isn't supported?

We need people like you to get it supported. Feel free to share such samples.

>
> $ ./ffmpeg -f lavfi -i testsrc -pix_fmt gbrp10le -c:v copy out.mxf
> ffmpeg version N-92260-g3cc3cb663b Copyright (c) 2000-2018 the FFmpeg
> developers
>   built with gcc 7 (Ubuntu 7.3.0-27ubuntu1~18.04)
>   configuration:
>   libavutil      56. 20.100 / 56. 20.100
>   libavcodec     58. 33.102 / 58. 33.102
>   libavformat    58. 19.102 / 58. 19.102
>   libavdevice    58.  4.106 / 58.  4.106
>   libavfilter     7. 37.100 /  7. 37.100
>   libswscale      5.  2.100 /  5.  2.100
>   libswresample   3.  2.100 /  3.  2.100
> Input #0, lavfi, from 'testsrc':
>   Duration: N/A, start: 0.000000, bitrate: N/A
>     Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24,
> 320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
> [mxf @ 0x56227a627880] track 0: could not find essence container ul,
> codec not currently supported in container
> Could not write header for output file #0 (incorrect codec parameters
> ?): Operation not permitted
> Stream mapping:
>   Stream #0:0 -> #0:0 (copy)
>     Last message repeated 1 times
>
> Best,
>
> Kieran.
> _______________________________________________
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> [hidden email]
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
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> To unsubscribe, visit link above, or email
> [hidden email] with subject "unsubscribe".
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Re: uncompressed RGB within MXF

Kieran O Leary
Hi Paul,

On Thu, 25 Oct 2018, 08:32 Paul B Mahol, <[hidden email]> wrote:

> On 10/24/18, Kieran O Leary <[hidden email]> wrote:
> > Hi,
> >
> > I see that uncompressed RGB is not supported within MXF. I know that
> > Resolve can create 10-bit RGB but only at HD resolution. I didn't see
> > anything relating to uncompressed RGB in the UL list in mxfenc.c and I
> > don't have an SMPTE account to get beyond the Paywall that would let
> > me know what RGB pixel formats are possible within MXF in a general
> > sense.
> >
> > I'm assuming that there isn't some option that I'm missing out on
> > here, it just isn't supported?
>
> We need people like you to get it supported. Feel free to share such
> samples.
>

So the RGB export from resolve could help? I will upload when I have access
to this software in about ten days.

Best,

Kieran
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Re: uncompressed RGB within MXF

Kieran O'Leary
Here is a sample  - https://wetransfer.com/downloads/99e7bddc04e6faee2e001ad2ebed4a3c20181119152241/ce77f8

This was exported from Resolve 14 using the AVID 1:1 10-bit RGB 1080p setting.

Apologies for the delay,

Kieran O'Leary
------
This email has been scanned for spam and malware by The Email Laundry.

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Re: uncompressed RGB within MXF

Carl Eugen Hoyos-2
2018-11-19 16:25 GMT+01:00, Kieran O'Leary <[hidden email]>:
> Here is a sample  -
> https://wetransfer.com/downloads/99e7bddc04e6faee2e001ad2ebed4a3c20181119152241/ce77f8

To decode this file:
$ ffmpeg -vcodec avrp -i file
$ ffplay -vcodec avrp file

I was unable to find a useful uid != 0 in this file, suggestions welcome.

Carl Eugen
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Re: uncompressed RGB within MXF

Carl Eugen Hoyos-2
In reply to this post by Kieran O'Leary
2018-11-19 16:25 GMT+01:00, Kieran O'Leary <[hidden email]>:
> Here is a sample  -
> https://wetransfer.com/downloads/99e7bddc04e6faee2e001ad2ebed4a3c20181119152241/ce77f8

Can you use a binary editor and damage the metadata of the
file around hex position 0x1050 that currently says "R.G.B."
to check if the file still plays with whatever is supposed to
play it?
I wonder if metadata is really sufficient to decode an mxf
file...

Carl Eugen
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Re: uncompressed RGB within MXF

Reto Kromer-2
Carl Eugen Hoyos wrote:

>I wonder if metadata is really sufficient to decode an mxf
>file...

In my personal opinion, no. Best regards, Reto

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Re: uncompressed RGB within MXF

Carl Eugen Hoyos-2
2018-11-19 18:34 GMT+01:00, Reto Kromer <[hidden email]>:
> Carl Eugen Hoyos wrote:
>
>>I wonder if metadata is really sufficient to decode an mxf
>>file...
>
> In my personal opinion, no.

My question was:
Does the player that already supports this abomination depend
on the metadata? I would prefer to rule this out before spending
more time with this 4G file.

Carl Eugen
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Re: uncompressed RGB within MXF

yUGz afterLife
Dont know wut iz mxf but already had some well taged mp3 on aimp that ffprobe doesnt read (on a normal mp3)
Maybe be private data id3 or no id WTF …

Hugo

De : Carl Eugen Hoyos
Envoyé le :lundi 19 novembre 2018 18:36
À : FFmpeg user questions
Objet :Re: [FFmpeg-user] uncompressed RGB within MXF

2018-11-19 18:34 GMT+01:00, Reto Kromer <[hidden email]>:
> Carl Eugen Hoyos wrote:
>
>>I wonder if metadata is really sufficient to decode an mxf
>>file...
>
> In my personal opinion, no.

My question was:
Does the player that already supports this abomination depend
on the metadata? I would prefer to rule this out before spending
more time with this 4G file.

Carl Eugen
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Re: uncompressed RGB within MXF

Kieran O Leary
In reply to this post by Carl Eugen Hoyos-2
On Mon, 19 Nov 2018, 17:36 Carl Eugen Hoyos <[hidden email] wrote:

> 2018-11-19 18:34 GMT+01:00, Reto Kromer <[hidden email]>:
> > Carl Eugen Hoyos wrote:
> >
> >>I wonder if metadata is really sufficient to decode an mxf
> >>file...
> >
> > In my personal opinion, no.
>
> My question was:
> Does the player that already supports this abomination depend
> on the metadata? I would prefer to rule this out before spending
> more time with this 4G file.
>

I understand. I will try to hack around with it tomorrow and see if resolve
and avid can read it.

Thanks,

Kieran
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Re: uncompressed RGB within MXF

Reto Kromer-2
In reply to this post by Carl Eugen Hoyos-2
Carl Eugen Hoyos wrote:

>My question was:
>Does the player that already supports this abomination depend
>on the metadata? I would prefer to rule this out before spending
>more time with this 4G file.

It's actually what I'm trying to figure out! I suspect no, but I
cannot say it for sure so far.

Best regards, Reto

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Re: uncompressed RGB within MXF

Carl Eugen Hoyos-2
2018-11-19 18:42 GMT+01:00, Reto Kromer <[hidden email]>:
> Carl Eugen Hoyos wrote:
>
>>My question was:
>>Does the player that already supports this abomination depend
>>on the metadata? I would prefer to rule this out before spending
>>more time with this 4G file.
>
> It's actually what I'm trying to figure out! I suspect no, but I
> cannot say it for sure so far.

Just change "R.G.B." into "S.H.C." and check if the file still
plays.

Carl Eugen
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Re: uncompressed RGB within MXF

Paul B Mahol
On 11/19/18, Carl Eugen Hoyos <[hidden email]> wrote:

> 2018-11-19 18:42 GMT+01:00, Reto Kromer <[hidden email]>:
>> Carl Eugen Hoyos wrote:
>>
>>>My question was:
>>>Does the player that already supports this abomination depend
>>>on the metadata? I would prefer to rule this out before spending
>>>more time with this 4G file.
>>
>> It's actually what I'm trying to figure out! I suspect no, but I
>> cannot say it for sure so far.
>
> Just change "R.G.B." into "S.H.C." and check if the file still
> plays.

Why S.H.C.? and not C.E.H.
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Re: uncompressed RGB within MXF

Paul B Mahol
In reply to this post by yUGz afterLife
On 11/19/18, yUGz afterLife <[hidden email]> wrote:
> Dont know wut iz mxf but already had some well taged mp3 on aimp that
> ffprobe doesnt read (on a normal mp3)
> Maybe be private data id3 or no id WTF …
>

Please, share file.
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Re: uncompressed RGB within MXF

yUGz afterLife
In reply to this post by Paul B Mahol
Becoz nike

Hugo

De : Paul B Mahol
Envoyé le :lundi 19 novembre 2018 18:55
À : FFmpeg user questions
Objet :Re: [FFmpeg-user] uncompressed RGB within MXF

On 11/19/18, Carl Eugen Hoyos <[hidden email]> wrote:

> 2018-11-19 18:42 GMT+01:00, Reto Kromer <[hidden email]>:
>> Carl Eugen Hoyos wrote:
>>
>>>My question was:
>>>Does the player that already supports this abomination depend
>>>on the metadata? I would prefer to rule this out before spending
>>>more time with this 4G file.
>>
>> It's actually what I'm trying to figure out! I suspect no, but I
>> cannot say it for sure so far.
>
> Just change "R.G.B." into "S.H.C." and check if the file still
> plays.

Why S.H.C.? and not C.E.H.
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