[FFmpeg-trac] #6192(swscale:new): bus error core dump in swscale optimizations on arm
FFmpeg
trac at avcodec.org
Tue Feb 28 23:24:54 EET 2017
#6192: bus error core dump in swscale optimizations on arm
--------------------------------------+-----------------------------------
Reporter: peterbennett | Owner:
Type: defect | Status: new
Priority: normal | Component: swscale
Version: 3.2.1 | Resolution:
Keywords: crash | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
--------------------------------------+-----------------------------------
Comment (by cehoyos):
Replying to [comment:5 peterbennett]:
> I tested this with the ffmpeg executable and I cannot reproduce it that
way. I traced through ffmpeg and it does call the sws_scale in a slightly
different way. When running the command line through ffmpeg there is the
following message
> [swscaler @ 0xad1c0] No accelerated colorspace conversion found from
yuv420p to bgra.
Why is the line `SET_FF_NVX_TO_ALL_RGBX_FUNC(yuv420p, YUV420P,
accurate_rnd);` that is mentioned on the MythTV bug tracker not called?
> The command line I used is
> ffmpeg -ss 2.0 -i /path/filename -frames 1 -pix_fmt bgra imagefile.bmp
(The console output may give an indication why the neon-optimized code is
not called.)
> It produces an image file without failure, and seems to be the same
thing we are trying to do.
> I do not know the cause of our error.
> We have a workaround and if you see no bug in ffmpeg here, please close
the ticket.
I suspect the work-around chosen is a very bad idea performance-wise.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/6192#comment:7>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
More information about the FFmpeg-trac
mailing list