Photon is erroring out if the CPL is missing audio tracks

[MagedMYoussef]

I'm getting the following error, when I run Photon on a CPL with no audio tracks.

ERROR-The Composition represented by Id XXXX does not contain a single audio essence in its first segment, one or more is required [Photon version: 4.7.0-SNAPSHOT]

According to the SMPTE ST 2067-2:2020 standard, audio tracks are not mandatory and IMP can contain video only. So, I think Photon shouldn't be throwing a FATAL error in this case.

Is there a plan for fixing this anytime soon?

[fschleich]

HI @MagedMYoussef - What is the value of ApplicationIdentification in your CPL? You should not see this error for App 2E 2020 CPLs (http://www.smpte-ra.org/ns/2067-21/2020), because the App 2E 2020 standard normatively references the version of Core Constraints you're quoting (ST 2067-2:2020). Older versions of App 2E, however, reference a version of Core Constraints that does require one or more Audio Virtual Tracks to be present.

[MagedMYoussef]

Hi @fschleich - Here's the value of ApplicationIdentification in the CPL
<ApplicationIdentification xmlns="http://www.smpte-ra.org/ns/2067-2/2020">http://www.smpte-ra.org/ns/2067-21/2020</ApplicationIdentification>
I can see it's the same as you mentioned, but somehow it still shows the "Missing Audio Virtual Tracks" error.

[fschleich]

Can you share the CPL for troubleshooting @MagedMYoussef ?

[MagedMYoussef]

Here you go @fschleich :
CPL_V30425662_TB_DTO_IMFA_HD-SDR_23_zxx-178_TVMN3U5TB.txt

P.S. I changed the file extension from .xml to .txt for github to attach it.

[fschleich]

Thanks, @MagedMYoussef. I'm unfortunately not able to reproduce the issue, the current master branch provides the following results:

fschleich@fschleich-macpro photon % photon_imp_validator.sh /Users/fschleich/Downloads/CPL_V30425662_TB_DTO_IMFA_HD-SDR_23_zxx-178_TVMN3U5TB.xml 
+ java -cp '/Users/fschleich/Developer/github/Netflix/photon/build/libs/*:*' com.netflix.imflibrary.app.IMPAnalyzer /Users/fschleich/Downloads/CPL_V30425662_TB_DTO_IMFA_HD-SDR_23_zxx-178_TVMN3U5TB.xml
2022-05-10 21:42:57,806  INFO [main] (IMPAnalyzer.java:627) - ==========================================================================

2022-05-10 21:42:57,809  INFO [main] (IMPAnalyzer.java:628) - Analyzing file CPL_V30425662_TB_DTO_IMFA_HD-SDR_23_zxx-178_TVMN3U5TB.xml
2022-05-10 21:42:57,809  INFO [main] (IMPAnalyzer.java:629) - ==========================================================================

2022-05-10 21:42:58,648  INFO [main] (IMPAnalyzer.java:581) - CPL_V30425662_TB_DTO_IMFA_HD-SDR_23_zxx-178_TVMN3U5TB.xml has no errors or warnings 

I'm now seeing that you seem to be running v4.7.0, you might have to update to v4.7.2 or later for the 2020 features.

[MagedMYoussef]

Hi @fschleich , Thanks for checking.
I did indeed run photon_imp_validator.sh on the CPL and it passed without errors successfully. However, in our use-case we are actually using Photon as an SDK and it produces the following errors when trying to parse the same CPL.

ERROR-Unsupported sequence type or schema Tag: cc:MainImageSequence URI: http://www.smpte-ra.org/ns/2067-2/2020 [Photon version: 4.7.2],ERROR-Missing ApplicationIdentification in CPL [Photon version: 4.7.2],ERROR-The Composition represented by Id cd2ee0cf-1131-4726-89bb-399aa782ad1c does not contain a single image essence in its first segment, exactly one is required [Photon version: 4.7.2],ERROR-The Composition represented by Id cd2ee0cf-1131-4726-89bb-399aa782ad1c does not contain a single audio essence in its first segment, one or more is required [Photon version: 4.7.2]

We are using this function to parse the CPL from Photon SDK which seems to have issues with 2020 features:
com.netflix.imflibrary.st2067_2.ApplicationCompositionFactory.getApplicationComposition

[MagedMYoussef]

Hi @fschleich , any update on this?

[FadyFahmy]

Hello @fschleich ,

I am facing the same issue with the spring SDK version 4.9.3

any updates with this?