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

[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


Thanks.
-Matthew McKenna

From 9f594113473f80c997e8d00855bf62015136cfa6 Mon Sep 17 00:00:00 2001
From: Matthew McKenna 
Date: Sat, 2 Mar 2019 12:09:25 -0500
Subject: [PATCH]lavf/mxfdec: Add the Canon XF-HEVC UL to the picture essence 
container UL list
 list

---
 libavformat/mxfdec.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index 0553adcb06..0367e4e41e 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -1328,6 +1328,7 @@ static const MXFCodecUL 
mxf_picture_essence_container_uls[] = {
 { { 
0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 
}, 14,   AV_CODEC_ID_RAWVIDEO, NULL, 15, RawVWrap }, /* uncompressed picture */
 { { 
0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0a,0x0e,0x0f,0x03,0x01,0x02,0x20,0x01,0x01 
}, 15, AV_CODEC_ID_HQ_HQA },
 { { 
0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0a,0x0e,0x0f,0x03,0x01,0x02,0x20,0x02,0x01 
}, 15,AV_CODEC_ID_HQX },
+{ { 
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 */
 { { 
0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4f 
}, 14,   AV_CODEC_ID_RAWVIDEO }, /* Legacy ?? Uncompressed Picture */
 { { 
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 
},  0,  AV_CODEC_ID_NONE },
 };
-- 
2.17.0

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Re: [FFmpeg-devel] [PATCH] fate: Add Canon XF705 demux tests

[Matthew McKenna]

On 3/8/2019 1:36 PM, Tomas Härdin wrote:

fre 2019-03-08 klockan 19:04 +0100 skrev Carl Eugen Hoyos:

2019-03-08 14:20 GMT+01:00, Tomas Härdin :


This adds some HEVC demux tests for mxfdec.c for the
Canon XF705 samples provided by Matthew McKenna.
I suspect the thing that's most valuable here is that the
codec probing works correctly, which it seems to do.

This email is missing the additional size in the fate repo.

I would prefer not to be the one arguing against an additional
test but afaict this is testing one line in a static array: Is that
really useful and does it justify a large additional file?

That's a fair point. Maybe if they were a single frame each.. Matthew?

/Tomas



Hi-


The "verysmall" clips are as small as I can make them -- 1.3 megabytes 
-- 1 second of video + audio w/ bars+tone.  As this is coming off the 
camera there is not much editing capability, and the camera has a 
minimum record duration.



Would it suffice to test only a subset or sample of the clips?


-Matt





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