[FFmpeg-trac] #5433(ffmpeg:new): Last frames are dropped while decoding with qsv decoder

[FFmpeg]

#5433: Last frames are dropped while decoding with qsv decoder
-------------------------------------+-------------------------------------
             Reporter:  Giribabu     |                     Type:  defect
               Status:  new          |                 Priority:  important
            Component:  ffmpeg       |                  Version:  2.8.3
             Keywords:  H264_qsv     |               Blocked By:
  decoder                            |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  1            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 I tried to install MSS SDK on HSW system , right now i can able to
 triggered HW accelerators (h264_qsv decoder),

 I am trying to compare decoding outputs with qsv decoder and without qsv
 decoder those two outputs are not matched..

 commands used are as follows..

 1) with qsv : ./ffmpeg -vcodec h264_qsv -r 30 -i input.264 -pix_fmt
 yuv420p output_qsv.yuv

 2) with out qsv : ./ffmpeg -i input.264 output_x264.yuv ( default decoder
 )

 these 2 outputs are output_qsv.yuv and output_x264.yuv files are not
 matched..

 I think that qsv decoding with different frame rate, that why i am using
 command by putting " -r 30 " before i/p read,now getting 0th frames twice
 while decoding with qsv ..but CPU utilization is very good while
 decoding..

 I think that both decoders (with and with out qsv options....) should
 match right..?


 ffmpeg version -- ffmpeg-3.0.1 downloaded from
 https://www.ffmpeg.org/download.html

 This is a latest one build from source repo only..

 I have faced few issues like:

 i)  most of the sequences getting " 0 " th frame twice while decoding with
 h264_qsv decoder,
 ii) Last 4 to 5 frames is not dumped in to output file,
 iii) few frames are also dropped into output file,
 iv) as per my observation those 4 frames are appended with N-15 frames in
 the output file, where N is the no of frames in a sequence
 but few frames are dropped..

 please give reply as soon as possible, please let me know any information
 needed..

 Thanks & Regards,
 L V GiriBabu..

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Ticket URL: <https://trac.ffmpeg.org/ticket/5433>
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