[FFmpeg-trac] #1294(undetermined:open): Support for Omneon AVC Intra 50/100 MXF OP1a files
FFmpeg
trac at avcodec.org
Fri Sep 21 17:24:38 CEST 2012
#1294: Support for Omneon AVC Intra 50/100 MXF OP1a files
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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 |
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Comment (by Thomas Mundt):
Maybe inconsistant was the wrong word. It looks like some colors from
previous frames are still there. It´s slight but visible especially at
crossfaded scene changes.
I investigated a little and as I now know where to look for the SPS/PPS, I
compared my samples with files from other sources.
AVID Transfermanager and Quantel headers have equal SPS/PPS but are
slightly different to the file wrapped by the XFConverter.
When I compile FFmpeg with the AVID/Quantel SPS/PPS the color problems are
gone!
So the XFConverter headers are inaccurate. The extracted header of the
AVCI50/720p file is even completely wrong, since it has the same SPS/PPS
as the AVCI100/720p file.
I´ve seen that you already build a patch at gmane.comp.video.ffmpeg.devel.
I extended it a little to additionally support AVCI100/720p and
AVCI50/1080i. Since I could not get other AVCI100/720p and AVCI50/1080i
files with working header, I used the XFConverter SPS/PPS.
And I found an AVCI100/1080p AVID file with SPS/PPS that also works for
the file from ticket #1666.
The patch is attached...
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1294#comment:15>
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