[FFmpeg-devel] [PATCH] libavformat/mxfdec: read source timecode from pulldown component

Mark Reid mindmark at gmail.com
Sat Oct 25 02:31:23 CEST 2014

Some avid generated mxf files store source timecode component on a 
pulldown component in the physcial source package. This patch adds
support for reading source timecode from the pulldown component if it is there. 
I was unable to find a pre-existing sample so I upload one to upload.ffmpeg.org.


output from ffprobe with patch:
Input #0, mxf, from ‘pulldown_example.mxf':
    uid             : 72b39808-5b65-9e4c-a830-fc22493803e3
    generation_uid  : b6bcfcab-70ff-7331-54ed-4b7469de11d2
    application_platform: AAFSDK (MacOS X)
    modification_date: 2014-10-13 01:45:36
    product_uid     : acfbf03a-4f42-a231-d0b7-c06ecd3d4ad7
    product_version : Unknown version
    product_name    : Avid Media Composer
    company_name    : Avid Technology, Inc.
  Duration: 00:00:00.04, start: 0.000000, bitrate: 100779 kb/s
    Stream #0:0: Video: dvvideo, yuv411p, 720x480 [SAR 32:27 DAR 16:9], 24 tbr, 24 tbn, 29.97 tbc
      reel_name       : pulldown_example.mov
      timecode        : 12:34:56:13

mxfenc.c uses uses the MXFMetadataSetType enum values to generate InstanceUIDs 
and thats why I had to update the fate-lavf-mxf tests. If I added 
PulldownComponent to the bottom of enum in mxf.h the tests don't fail. AFAIK the
InstanceUIDs just need to be unique.

Mark Reid (1):
  libavformat/mxfdec: read source timecode from pulldown component

 libavformat/mxf.h      |  1 +
 libavformat/mxfdec.c   | 31 +++++++++++++++++++++++++++++--
 tests/ref/lavf/mxf     |  6 +++---
 tests/ref/lavf/mxf_d10 |  2 +-
 4 files changed, 34 insertions(+), 6 deletions(-)


More information about the ffmpeg-devel mailing list