On 9/15/25 15:26, Helmuth Schmitz via ffmpeg-devel wrote:
The first UL of the SMPTE 436M descriptor triple in mxfenc.c used 0x0a
instead of 0x09. This caused generated MXF files without "MXF-GC Generic
ANC
Data Mapping" essence container descriptor.
This patch corrects the UL to align with SMPTE RP224, so that the ANC
descriptor is properly recognized.
Tested with MXFInspect and Adobe Premiere:
- Without the patch, the stream is not identified as ANC.
- With the patch, the ANC data is correctly detected as "Generic ANC Data".
FYI, early Omneon mxf api (>10 years back) had this bad version number,
it was fixed later and all other implementations I have met write the
right 0x09 value.
I don't think we care about so ancient rare broken files, so it should
be no big deal to simply fix this.
Nicolas
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