[FFmpeg-trac] #1294(undetermined:open): Support for Omneon AVC Intra 50/100 MXF OP1a files

FFmpeg trac at avcodec.org
Sun Sep 23 02:46:31 CEST 2012

#1294: Support for Omneon AVC Intra 50/100 MXF OP1a files
             Reporter:  Thomas       |                    Owner:
  Mundt                              |                   Status:  open
                 Type:  defect       |                Component:
             Priority:  normal       |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  h264intra    |               Blocked By:
  mxf                                |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |

Comment (by Thomas Mundt):

 About 1) I think I´ve found the correct SPS now. But at all AVCI50/1080i
 samples the DAR is set to 3/4. To me the patch is also necessary because I
 often had material with wrong aspect ratio in the video header and correct
 ar in the mxf header.
 But I removed it from the avci-patch.

 About 2) Thanks for the hint! Im not a good programmer. Actually the patch
 works without that because the field order was set correct before in the
 mov-decoder. It´s only necessary for the mxf-decoder.

 I´m not shure if the 1080p/25 SPS/PPS will also work for 1080p/50. I
 wanted to add a framerate check, but st->r_frame_rate didn´t work for mxf
 files. I will try to get some AVID 1080/p50 files to see if it is
 necessary at all.

 btw: Since I can decode Panasonic AVCI now, is it possible to encode it
 with ffmpeg by the knowledge of the SPS/PPS?

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1294#comment:18>
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