• Huang, Zhengxu's avatar
    libavfilter/overlay_qsv: Add QSV overlay vpp filter · a5a6ac1a
    Huang, Zhengxu authored
    The filter supports two inputs and (implicitly) scaling the second input
    during composition, unlike the software overlay.
    
    The code has been separated into common interface and qsv overlay
    implementation. The common part mainly creates the qsv session and
    manages the surface which is nearly the same for all qsv filters.
    So the qsvvpp.c/qsvvpp.h API can be used by other QSV vpp filters
    to reduce code redundancy.
    
    Usage:
     -hwaccel qsv -c:v mpeg2_qsv -r 25 -i in.m2v -hwaccel qsv -c:v h264_qsv
     -i in.h264 -filter_complex
     "overlay_qsv=eof_action=repeat:x=(W-w)/2:y=(H-h)/2"  -b 2M -maxrate 3M
     -c:v h264_qsv -y out.h264
    
    Two inputs should have different sizes otherwise one will be completely
    covered or you need to scale the second input as follows:
      -hwaccel qsv -c:v mpeg2_qsv -r 25 -i in.m2v -hwaccel qsv -c:v h264_qsv
      -i in.h264 -filter_complex
      "overlay_qsv=w=720:h=576:x=(W-w)/2:y=(H-h)/2" -b 2M -maxrate 3M -c:v
      h264_qsv -y out.h264
    Signed-off-by: 's avatarChaoX A Liu <chaox.a.liu@gmail.com>
    Signed-off-by: 's avatarZhengxu Huang <zhengxu.maxwell@gmail.com>
    Signed-off-by: 's avatarAndrew Zhang <huazh407@gmail.com>
      Change-Id: I5c381febb0af6e2f9622c54ba00490ab99d48297
    Signed-off-by: 's avatarMaxym Dmytrychenko <maxim.d33@gmail.com>
    a5a6ac1a
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