[FFmpeg-trac] #7839(avcodec:new): QVBR breaks mpeg2_qsv

[FFmpeg]

#7839: QVBR breaks mpeg2_qsv
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             Reporter:  atorp        |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  qsv          |               Blocked By:
  regression                         |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by atorp):

 Hi,

 Replying to [comment:8 lizhong1008]:

 > Can't reproduce it on my side (Linux), and I don't think the regression
 is caused by QVBR since your log show that your are working on AVBR mode
 instead of QVBR.

 Sorry. I don't commented that I'm using WINDOWS. However, it's implicit as
 I use "ffmpeg.exe" in the description of the bug.
 Futhermore I do all tests with zeranoe binaries. You can download and test
 by your self.
 The versions prior to 2019-01-25 work, but from this date not.

 And yes, I'm not using QVBR at all. The problem is that the "mpeg2_qsv"
 never works after this date. You can use any parameters, it always prints
 the failure.

 Replying to [comment:8 lizhong1008]:


 > Probably it is that your MSDK version can't support coding option 3.


 I don't know it! I'm using Windows 10 with the last Intel drivers
 installed. And the binaries are the "zeranoe".

 Replying to [comment:8 lizhong1008]:

 > 1. Could you please tell me what is your MSDK API version and library
 version.
 > 2. Apply the patch:
 > -#define QSV_HAVE_CO3 QSV_VERSION_ATLEAST(1, 11)
 > +#define QSV_HAVE_CO3 0
 > Don't change anything else.
 > 3. If it is possible, update your MSDK version can try again.


 I'll do more tests. But, your suggestion of patch is already included in
 my previous fix! But it disables at all QVBR.

 In any case, please try it on Windows.
 Thank you for your support.

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Ticket URL: <https://trac.ffmpeg.org/ticket/7839#comment:9>
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