[FFmpeg-devel] Fwd: Re: [PATCH] mxfdec.c: prefer metadata from Footer

[Marton Balint]

On Fri, 30 Jul 2021, Tomas Härdin wrote:

> tor 2021-07-29 klockan 22:17 +0200 skrev Marton Balint:
>> On Fri, 23 Jul 2021, emcodem at ffastrans.com wrote:
>> 
>> > Am 2021-07-04 20:31, schrieb emcodem at ffastrans.com:
>> > > Am 2021-07-04 20:28, schrieb emcodem at ffastrans.com:
>> > > > Am 2021-07-04 17:28, schrieb Marton Balint:
>> > > > > On Sat, 3 Jul 2021, Tomas Härdin wrote:
>> > > > > 
>> > > > > > lör 2021-07-03 klockan 15:13 +0200 skrev emcodem at ffastrans.com:
>> > > > > > > Unfortunately the wetransfer link for the fate samples expired, so 
>> > > > > > > i thought it might be a good idea to resend it as link to gdrive:
>> > > > > > > 
>> > https://drive.google.com/file/d/1yXTdS9RfOsduzg49vBLEshdmIzdaVQfd/view?usp=sharing
>> > > > > > > Also attached the 2 patches: 1 from cus for mxfdec.c and one from 
>> > > > > > > myself for the corresponding fate samples.
>> > > > > > > After applying the mxfdec.c patch, fate will pass with the 
>> > > > > > > currently existing tests but the files in the zip must be uploaded 
>> > > > > > > to the fate suite before applying my corresponding patch of course 
>> > > > > > > (otherwise the files don't exist).
>> > > > > > > 
>> > > > > > > It would be cool if someone found the time and wants to apply this.
>> > > > > > 
>> > > > > > The patch works (except for the samples not being in FATE)
>> > > > > 
>> > > > > Actually I found one file where the packetization behaviour changes,
>> > > > > because after the patch a fake index is generated based of the now
>> > > > > recognized duration:
>> > > > > 
>> > > > > samples/MXF/freemxf/freeMXF-mxf-dv-1.mxf
>> > > > > 
>> > > > > but I guess the file is wrong because clip wrapped UL is used when 
>> > > > > the
>> > > > > file seems frame wrapped instead?
>> > > > 
>> > > > Nice finding! I can confirm this, it is actually clip wrapped looking
>> > > > at the mxf dump from bmx. These samples are pretty outdated anyway :D
>> > > > Unfortunately i don't have enough insight on the internals yet on the
>> > > > topic about adding/freeing/deleting metadata sets :-(
>> > > 
>> > > FRAME Wrapped it is, not clip wrapped :rolleyes:
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>> > 
>> > Anything left that needs investigation/correction on this one? ...it 
>> > looks to be a very nice addition so far.
>> 
>> I was waiting for some comments from Tomas, to see if he has a preference, 
>> but I guess I will apply in a few days if no further comments are 
>> received.
>
> I don't have much more to add. We don't have to support every broken
> file, and this patch beings us more in line with what's correct, as far
> as I can tell.

Ok, thanks, applied my version then.

Regards,
Marton