[FFmpeg-trac] #4831(avcodec:reopened): Can't initialize h264_qsv encoder post Aug 29 2015 - Ivy Bridge CPU

FFmpeg trac at avcodec.org
Tue Sep 22 12:10:56 CEST 2015

#4831: Can't initialize h264_qsv encoder post Aug 29 2015 - Ivy Bridge CPU
             Reporter:  babgvant     |                    Owner:  IvUs
                 Type:  defect       |                   Status:  reopened
             Priority:  important    |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  qsv          |               Blocked By:
  regression                         |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  1            |

Comment (by babgvant):

 Do mean whether LA will actually happen or if the encoder will fail to

 Here's output from my app, which I added some logging to show that it is
 able to configure LA depth (1.7) & LA downsampling (1.8) on my IVB box.

 qstranscode v1.0.4.1
 Intel(R) QuickSync Transcoding With FFMPEG
 IPG:        Intel(R) Core(TM) i7-3770S CPU @ 3.10GHz
 GFX Driver:

 Microsoft Windows Server 2012 R2 (build 9600), 64-bit defaulting to DX11
 Selected audio track: 1
 Selected video track: 0
 Selected streams: video = 0 audio = 1
 SDK: v1.11 IMPL: HARDWARE <-- reported SDK version
 Configure LADS: 2 <-- m_CodingOptions2.LookAheadDS set
 Configure LAD: 100 <-- m_CodingOptions2.LookAheadDepth set
 [mp4 @ 007032c0] Using AVStream.codec.time_base as a timebase hint to the
 muxer is deprecated. Set AVStream.time_base instead.
 Input  video: AVC
 Output video: AVC
 MFX dll: C:\Program Files\Intel\Media SDK\libmfxhw32.dll

 Transcoding started
 Transcoding finished

 Common transcoding time is  14.48 sec
 MFX session 0 transcoding PASSED:
 Processing time: 14.48 sec
 Number of processed frames: 11412

 All done...
 [end output]

 I can't say whether it actually does the LA feature inside the MSDK, but
 it doesn't fail to encode the file.

Ticket URL: <https://trac.ffmpeg.org/ticket/4831#comment:27>
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