[FFmpeg-trac] #5352(avcodec:open): encoding error with VideoToolbox H.264 Encoder and profile high

[FFmpeg]

#5352: encoding error with VideoToolbox H.264 Encoder and profile high
---------------------------------------+-----------------------------------
             Reporter:  ponpon         |                    Owner:  kernrj
                 Type:  defect         |                   Status:  open
             Priority:  important      |                Component:  avcodec
              Version:  git-master     |               Resolution:
             Keywords:  crash SIGSEGV  |               Blocked By:
             Blocking:                 |  Reproduced by developer:  0
Analyzed by developer:  0              |
---------------------------------------+-----------------------------------

Comment (by ponpon):

 Replying to [comment:7 kernrj]:
 excellent!! good results on all profiles. cheers for good work.

 comment and request
 comment
 doesn't VideoToolbox H.264 Encoder output a proper size to display?
 probably VideoToolbox H.264 doesn't set par or sar on a video stream.
 i tried
 {{{
 ffmpeg  -y -i city_4cif.y4m -c:v h264_videotoolbox -profile:v high -vf
 scale=720:480 -aspect 4:3 h264_videotoolbox.264
 ffmpeg  -y -i city_4cif.y4m -c:v h264_videotoolbox -profile:v high -vf
 scale=720:480 -aspect 4:3 h264_videotoolbox.mp4
 ffmpeg  -y -i city_4cif.y4m -c:v libx264 -profile:v high -vf scale=720:480
 -aspect 4:3 libx264.264
 }}}
 only h264_videotoolbox.264 isn't properly displayed with mpv.
 seeing {{{videotoolboxenc.c}}},
 {{{kVTCompressionPropertyKey_CleanAperture}}} and
 {{{kVTCompressionPropertyKey_PixelAspectRatio}}} aren't supported. is it a
 cause?

 request of support for the below properties in
 {{{VTCompressionSession.h}}}.
 in particular, i strongly request {{{kVTCompressionPropertyKey_Quality}}},
 {{{kVTCompressionPropertyKey_FieldCount}}}, and
 {{{kVTCompressionPropertyKey_FieldDetail}}}.

 for options of general encoding
 {{{kVTCompressionPropertyKey_MaxKeyFrameIntervalDuration}}}
 {{{kVTCompressionPropertyKey_AllowTemporalCompression}}}
 {{{kVTCompressionPropertyKey_DataRateLimits}}}
 {{{kVTCompressionPropertyKey_Quality}}}
 {{{kVTCompressionPropertyKey_H264EntropyMode}}}

 for capture or real-time distribution? i don't well understand the below.
 {{{kVTCompressionPropertyKey_MoreFramesBeforeStart}}}
 {{{kVTCompressionPropertyKey_MoreFramesAfterEnd}}}
 {{{kVTCompressionPropertyKey_MaxH264SliceBytes}}}

 for capture or real-time distribution
 {{{kVTCompressionPropertyKey_RealTime}}}

 for confirming whether hardware encoding or not
 {{{kVTCompressionPropertyKey_UsingHardwareAcceleratedVideoEncoder}}}

 for interlaced encoding
 {{{kVTCompressionPropertyKey_FieldCount}}}
 {{{kVTCompressionPropertyKey_FieldDetail}}}

 for proper color to display
 {{{kVTCompressionPropertyKey_ColorPrimaries}}}
 {{{kVTCompressionPropertyKey_TransferFunction}}}
 {{{kVTCompressionPropertyKey_YCbCrMatrix}}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5352#comment:8>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker