[FFmpeg-devel] [PATCH]lavf/mxfdec: Allow MXF parser to identify the Canon XF-HEVC codec/format for video essence

[Tomas Härdin]

sön 2019-03-03 klockan 21:59 -0500 skrev Matthew McKenna:
> Hello ffmpeg-devel:
> 
> Attached is a patch to allow the MXF parser to identify the Canon 
> XF-HEVC codec for video essence.
> 
> This codec/containerization is found in the Canon XF-705 camera that 
> Canon released in 2018.  The camera can encode video using HEVC at 
> either a 110 or 160 Mbps bitrate, and the video is 3840x2160, YCC 4:2:2 
> at 10-bit depth (at a variety of choosable framerates).
> 
> At the moment there is little information published about the 
> containerization of the video, and I am not aware of it being a SMPTE 
> standard or otherwise.  However, by identifying the video as 
> AV_CODEC_ID_HEVC by way of its universal label (UL), ffmpeg can make use 
> of the video.  Bitrate, resolution, color space, framerate, and bit 
> depth all seem to be correctly identified.
> 
> Sample MXF files, as well as their successful conversion thru a patched 
> ffmpeg, are available at 
> http://www.matthewmckenna.com/contrib/ffmpeg/xf-hevc
> 

> +    { {
> 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0a,0x0e,0x15,0x00,0x04,0x02,0x10
> ,0x00,0x01 }, 14,       AV_CODEC_ID_HEVC, NULL, 15 }, /* Canon XF-
> HEVC */

Got any idea what other ULs there are for this? If not then you should
probably be more strict and pick a matching length of 16 instead of 14.
Especially since you say there is no speficiation for it yet.

/Tomas