[FFmpeg-user] Failed setup for format vulkan: hwaccel initialisation returned error for Arc A750

Greg Oliver oliver.greg at gmail.com
Wed Aug 21 23:31:31 EEST 2024


On Wed, Aug 21, 2024 at 2:41 PM Terje J. Hanssen
<terjejhanssen at gmail.com> wrote:
>
>
>
> Den 15.08.2024 20:29, skrev Terje J. Hanssen:
> >
> >
> > tor. 15. aug. 2024, 13:27 skrev Wang, Fei W <fei.w.wang at intel.com>:
> >
> >     On Wed, 2024-08-14 at 22:43 +0300, Dennis Mungai wrote:
> >     > On Wed, 14 Aug 2024 at 15:27, Terje J. Hanssen
> >     > <terjejhanssen at gmail.com> wrote:
> >     > >
> >     > >
> >     > > Den 14.08.2024 14:22, skrev Dennis Mungai:
> >     > >
> >     > > > On Wed, Aug 14, 2024, 15:15 Terje J. Hanssen
> >     > > > <terjejhanssen at gmail.com> wrote:
> >     > > >
> >     > > > >
> >     > > > >
> >     > > > > Den 14.08.2024 02:05, skrev Dennis Mungai:
> >     > > > >
> >     > > > > > On Wed, 14 Aug 2024, 02:59 Dennis Mungai,
> >     <dmngaie at gmail.com>
> >     > > > > > wrote:
> >     > > > > >
> >     > > > > > > On Wed, 14 Aug 2024, 02:45 Terje J. Hanssen,
> >     > > > > > > <terjejhanssen at gmail.com> wrote:
> >     > > > > > >
> >     > > > > > > >
> >     > > > > > > >
> >     > > > > > > > Den 13.08.2024 19:40, skrev Dennis Mungai:
> >     > > > > > > >
> >     > > > > > > > > On Tue, 13 Aug 2024 at 19:49, Andrew Randrianasulu
> >     > > > > > > > > <randrianasulu at gmail.com>
> >     > > > > > > > > wrote:
> >     > > > > > > > >
> >     > > > > > > > >
> >     > > > > > > > > > вт, 13 авг. 2024 г., 19:46 Terje J. Hanssen
> >     > > > > > > > > > <terjejhanssen at gmail.com>:
> >     > > > > > > > > >
> >     > > > > > > > > >
> >     > > > > > > > > > > Hi,
> >     > > > > > > > > > >
> >     > > > > > > > > > > I try to test Vulkan h264 or h265 decoding
> >     > > > > > > > > > > according to test command at
> >     > > > > > > > > > > https://trac.ffmpeg.org/wiki/HWAccelIntro#Vulkan
> >     > > > > > > > > > > ffmpeg -init_hw_device "vulkan=vk:0" -hwaccel
> >     > > > > > > > > > > vulkan
> >     > > > > > > > > > > -hwaccel_output_format vulkan -i INPUT -f null - -
> >     > > > > > > > > > > benchmark
> >     > > > > > > > > > >
> >     > > > > > > > > > > but get the following output error:
> >     > > > > > > > > > > [h264 @ 0x55952760cf40] Failed setup for format
> >     > > > > > > > > > > vulkan: hwaccel
> >     > > > > > > > > > > initialisation returned error.
> >     > > > > > > > > > > or
> >     > > > > > > > > > > [hevc @ 0x5580e96e8c80] Failed setup for format
> >     > > > > > > > > > > vulkan: hwaccel
> >     > > > > > > > > > > initialisation returned error.
> >     > > > > > > > > > >
> >     > > > > > > > > > > Any suggestion how to solve it?
> >     > > > > > > > > > >
> >     > > > > > > > > > Honestly, no idea .. try ffmpeg matrix/irc
> >     channel or
> >     > > > > > > > > > ffmpeg-user?
> >     > > > > > > > > >
> >     > > > > > > > > This has to do with your input file. Your log
> >     indicates
> >     > > > > > > > > that you're
> >     > > > > > > > > attempting to decode 10-bit H.264, and from my
> >     > > > > > > > > suspicion, almost zero GPUs
> >     > > > > > > > > implement 10-bit H.264 decode.
> >     > > > > > > > > You can verify via vainfo's output to see the decoder
> >     > > > > > > > > limitation(s) for
> >     > > > > > > > > H.264 levels, etc.
> >     > > > > > > > > Try decoding any of the sample file from Kodi's H.264
> >     > > > > > > > > sample collection:
> >     > > > > > > > >
> >     https://kodi.wiki/view/Samples#Codecs,_Framerates,_Blac
> >     > > > > > > > > k-levels_and_Subtitles
> >     > > > > > > > > And report back.
> >     > > > > > > > > _______________________________________________
> >     > > > > > > > >
> >     > > > > > > >
> >     > > > > > > >  1) Thank you for your suspicion regarding almost zero
> >     > > > > > > > GPUs implement 10-bit H.264 decode.
> >     > > > > > > >  This is obviously true in my case, because when I
> >     tested
> >     > > > > > > > a h264 8-bit yuv420p file, the hwaccel
> >     > > > > > > >  initialisation error was away. Full ffmpeg output
> >     report
> >     > > > > > > > below using my own encoded input file.
> >     > > > > > > >  (Even with a h264 8-bit yuv422p input file ffmpeg did
> >     > > > > > > > output the hwaccel initialisation error)
> >     > > > > > > >
> >     > > > > > > >  2) However Intel Arc A-series should support HEVC
> >     > > > > > > > (H.265) 10-bit 4:2:0 and 10-bit 4:2:2 decode and encode
> >     > > > > > > > formats  according to this page:
> >     > > > > > > > https://www.intel.com/content/www/us/en/support/articles
> >     > > > > > > > /000098345/graphics.html
> >     > > > > > > >  Also testing the corresponding input file in this
> >     format
> >     > > > > > > > get the hwaccel initialisation error, see the full
> >     ffmpeg
> >     > > > > > > > output below.
> >     > > > > > > >
> >     > > > > > > >
> >     > > > > > > >
> >     > > > > > >
> >     > > > >  .......snip
> >     > > > >
> >     > > > >
> >     > > > > >
> >     > > > > > >
> >     > > > > > > > -------------
> >     > > > > > > >
> >     .....snip
> >     > > > > > > >  --------------
> >     > > > > > > >
> >     > > > > > > >  2) 23M h265_yuv422p10le_SR.mp4
> >     > > > > > > >
> >     > > > > > > >  ffmpeg -hide_banner -init_hw_device "vulkan=vk:0" -
> >     > > > > > > > hwaccel vulkan -hwaccel_output_format vulkan -i
> >     > > > > > > > h265_yuv422p10le_SR.mp4 -f null - -benchmark
> >     > > > > > > >  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
> >     > > > > > > > 'h265_yuv422p10le_SR.mp4':
> >     > > > > > > >    Metadata:
> >     > > > > > > >      major_brand     : isom
> >     > > > > > > >      minor_version   : 512
> >     > > > > > > >      compatible_brands: isomiso2mp41
> >     > > > > > > >      encoder         : Lavf61.1.100
> >     > > > > > > >    Duration: 00:01:11.16, start: 0.000000, bitrate: 2703
> >     > > > > > > > kb/s
> >     > > > > > > >    Stream #0:0[0x1](und): Video: hevc (Rext) (hev1 /
> >     > > > > > > > 0x31766568), yuv422p10le(pc, smpte170m/unknown/unknown,
> >     > > > > > > > top coded first (swapped)), 1920x1080 [SAR 1:1 DAR
> >     16:9],
> >     > > > > > > > 2700 kb/s, 25 fps, 25 tbr, 12800 tbn (default)
> >     > > > > > > >        Metadata:
> >     > > > > > > >          handler_name    : VideoHandler
> >     > > > > > > >          vendor_id       : [0][0][0][0]
> >     > > > > > > >  Stream mapping:
> >     > > > > > > >    Stream #0:0 -> #0:0 (hevc (native) -> wrapped_avframe
> >     > > > > > > > (native))
> >     > > > > > > >  Press [q] to stop, [?] for help
> >     > > > > > > >  ** [hevc @ 0x55edf209fa40] Failed setup for format
> >     > > > > > > > vulkan: hwaccel initialisation returned error.
> >     > > > > > > >  ** [hevc @ 0x55edf209fa40] Unsupported film grain
> >     > > > > > > > parameters. Ignoring film grain.
> >     > > > > > > >  Output #0, null, to 'pipe:':
> >     > > > > > > >    Metadata:
> >     > > > > > > >      major_brand     : isom
> >     > > > > > > >      minor_version   : 512
> >     > > > > > > >      compatible_brands: isomiso2mp41
> >     > > > > > > >      encoder         : Lavf61.1.100
> >     > > > > > > >    Stream #0:0(und): Video: wrapped_avframe,
> >     > > > > > > > yuv422p10le(pc, smpte170m/unknown/unknown, progressive),
> >     > > > > > > > 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps,
> >     > > > > > > > 25 tbn (default)
> >     > > > > > > >        Metadata:
> >     > > > > > > >          handler_name    : VideoHandler
> >     > > > > > > >          vendor_id       : [0][0][0][0]
> >     > > > > > > >          encoder         : Lavc61.3.100 wrapped_avframe
> >     > > > > > > >  [out#0/null @ 0x55edf207ff40] video:764KiB audio:0KiB
> >     > > > > > > > subtitle:0KiB other streams:0KiB global headers:0KiB
> >     > > > > > > > muxing overhead: unknown
> >     > > > > > > >  frame= 1779 fps=750 q=-0.0 Lsize=N/A time=00:01:11.16
> >     > > > > > > > bitrate=N/A speed=  30x
> >     > > > > > > >  bench: utime=15.892s stime=0.188s rtime=2.371s
> >     > > > > > > >  bench: maxrss=411104KiB
> >     > > > > > > >
> >     > > > > > >
> >     > > > > > >
> >     > > > > > > It seems that as implemented, Vulkan decoding is
> >     definitely
> >     > > > > > > failing with interlaced HEVC video, regardless of the
> >     > > > > > > underlying pixel format.
> >     > > > > > >
> >     > > > > > > The file failing on your end is interlaced HEVC,
> >     > > > > > > see h265_yuv422p10le_SR.mp4
> >     > > > > > >
> >     > > > > >
> >     > > > > > This ticket may also be relevant, interlaced HEVC
> >     encodes are
> >     > > > > > quite rare out here and may be non-spec compliant.
> >     > > > > >
> >     > > > >  ======================
> >     > > > >
> >     > > > >  Good points.
> >     > > > >
> >     > > > >  My original ProRes422 HQ source input file before encoding to
> >     > > > > HEVC using CinelerraGG/FFmpeg, was a  in a valid HD
> >     > > > > 1920x1080i25 format.
> >     > > > >  I also had a look at the available ffmpeg pixel formats:
> >     > > > >
> >     > > > >  ffmpeg -hide_banner -h encoder=hevc | grep yuv422p10
> >     > > > >      Supported pixel formats: yuv420p yuvj420p yuv422p
> >     yuvj422p
> >     > > > > yuv444p yuvj444p gbrp yuv420p10le yuv422p10le yuv444p10le
> >     > > > > gbrp10le yuv420p12le yuv422p12le yuv444p12le gbrp12le gray
> >     > > > > gray10le gray12le
> >     > > > >
> >     > > > >  ffmpeg -hide_banner -h full codecs=hevc | grep yuv422p10
> >     > > > >       yuv422p10       64 ..FV.......
> >     > > > >       yuv422p10       3 ..FV.......
> >     > > > >
> >     > > > >  So now in a third attempt,  I've tried to simply deinterlace
> >     > > > > the H.265 file, but still get the ffmpeg Vulkan hwaccel
> >     > > > > initialisation error.
> >     > > > >  I'm wondering if my deinterlace code line is correct, because
> >     > > > > the deinterlaced output is smaller (halph the size) of the
> >     > > > > input file.
> >     > > > >  I would have expected it larger(?)
> >     > > > >
> >     > > > >  --------------
> >     > > > >
> >     > > > >  ffmpeg -hide_banner -i h265_yuv422p10le_SR.mp4 -vf
> >     > > > > yadif=parity=auto -c:v libx265 -c:a copy
> >     > > > > h265_yuv422p10le_SR_deinterlaced.mp4
> >     > > > >  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
> >     > > > > 'h265_yuv422p10le_SR.mp4':
> >     > > > >    Metadata:
> >     > > > >      major_brand     : isom
> >     > > > >      minor_version   : 512
> >     > > > >      compatible_brands: isomiso2mp41
> >     > > > >      encoder         : Lavf61.1.100
> >     > > > >    Duration: 00:01:11.16, start: 0.000000, bitrate: 2703 kb/s
> >     > > > >    Stream #0:0[0x1](und): Video: hevc (Rext) (hev1 /
> >     > > > > 0x31766568), yuv422p10le(pc, smpte170m/unknown/unknown, top
> >     > > > > coded first (swapped)), 1920x1080 [SAR 1:1 DAR 16:9], 2700
> >     > > > > kb/s, 25 fps, 25 tbr, 12800 tbn (default)
> >     > > > >        Metadata:
> >     > > > >          handler_name    : VideoHandler
> >     > > > >          vendor_id       : [0][0][0][0]
> >     > > > >  File 'h265_yuv422p10le_SR_deinterlaced.mp4' already exists.
> >     > > > > Overwrite? [y/N] y
> >     > > > >  Stream mapping:
> >     > > > >    Stream #0:0 -> #0:0 (hevc (native) -> hevc (libx265))
> >     > > > >  Press [q] to stop, [?] for help
> >     > > > >  x265 [info]: HEVC encoder version
> >     > > > >  x265 [info]: build info [Linux][GCC 13.3.0][64 bit] 10bit
> >     > > > >  x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT
> >     SSSE3
> >     > > > > SSE4.2 AVX FMA3 BMI2 AVX2
> >     > > > >  x265 [info]: Main 4:2:2 10 profile, Level-4 (Main tier)
> >     > > > >  x265 [info]: Thread pool created using 20 threads
> >     > > > >  x265 [info]: Slices                              : 1
> >     > > > >  x265 [info]: frame threads / pool features       : 4 / wpp(17
> >     > > > > rows)
> >     > > > >  x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
> >     > > > >  x265 [info]: Residual QT: max TU size, max depth : 32 / 1
> >     > > > > inter / 1 intra
> >     > > > >  x265 [info]: ME / range / subpel / merge         : hex / 57 /
> >     > > > > 2 / 3
> >     > > > >  x265 [info]: Keyframe min / max / scenecut / bias  : 25 / 250
> >     > > > > / 40 / 5.00
> >     > > > >  x265 [info]: Lookahead / bframes / badapt        : 20 / 4 / 2
> >     > > > >  x265 [info]: b-pyramid / weightp / weightb       : 1 / 1 / 0
> >     > > > >  x265 [info]: References / ref-limit  cu / depth  : 3 / off /
> >     > > > > on
> >     > > > >  x265 [info]: AQ: mode / str / qg-size / cu-tree  : 2 / 1.0 /
> >     > > > > 32 / 1
> >     > > > >  x265 [info]: Rate Control / qCompress            : CRF-28.0 /
> >     > > > > 0.60
> >     > > > >  x265 [info]: tools: rd=3 psy-rd=2.00 early-skip rskip mode=1
> >     > > > > signhide tmvp
> >     > > > >  x265 [info]: tools: b-intra strong-intra-smoothing lslices=6
> >     > > > > deblock sao
> >     > > > >  Output #0, mp4, to 'h265_yuv422p10le_SR_deinterlaced.mp4':
> >     > > > >    Metadata:
> >     > > > >      major_brand     : isom
> >     > > > >      minor_version   : 512
> >     > > > >      compatible_brands: isomiso2mp41
> >     > > > >      encoder         : Lavf61.1.100
> >     > > > >    Stream #0:0(und): Video: hevc (hev1 / 0x31766568),
> >     > > > > yuv422p10le(pc, smpte170m/unknown/unknown, progressive),
> >     > > > > 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 12800 tbn
> >     > > > > (default)
> >     > > > >        Metadata:
> >     > > > >          handler_name    : VideoHandler
> >     > > > >          vendor_id       : [0][0][0][0]
> >     > > > >          encoder         : Lavc61.3.100 libx265
> >     > > > >        Side data:
> >     > > > >          cpb: bitrate max/min/avg: 0/0/0 buffer size: 0
> >     > > > > vbv_delay: N/A
> >     > > > >  [out#0/mp4 @ 0x5623a778e940] video:11443KiB audio:0KiB
> >     > > > > subtitle:0KiB other streams:0KiB global headers:2KiB muxing
> >     > > > > overhead: 0.213827%
> >     > > > >  frame= 1779 fps= 48 q=32.7 Lsize= 11468KiB time=00:01:11.08
> >     > > > > bitrate=1321.7kbits/s speed=1.92x
> >     > > > >  x265 [info]: frame I:      9, Avg QP:26.34  kb/s: 10966.00
> >     > > > >  x265 [info]: frame P:    452, Avg QP:27.25  kb/s: 3883.36
> >     > > > >  x265 [info]: frame B:   1318, Avg QP:34.22  kb/s: 370.40
> >     > > > >  x265 [info]: Weighted P-Frames: Y:10.2% UV:0.0%
> >     > > > >
> >     > > > >  encoded 1779 frames in 36.97s (48.12 fps), 1316.56 kb/s, Avg
> >     > > > > QP:32.41
> >     > > > >
> >     > > > >  ----------------
> >     > > > >
> >     > > > >  3) 12M h265_yuv422p10le_SR_deinterlaced.mp4
> >     > > > >
> >     > > > >
> >     > > > >  ffmpeg -hide_banner -init_hw_device "vulkan=vk:0" -hwaccel
> >     > > > > vulkan -hwaccel_output_format vulkan -i
> >     > > > > h265_yuv422p10le_SR_deinterlaced.mp4 -f null - -benchmark
> >     > > > >  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
> >     > > > > 'h265_yuv422p10le_SR_deinterlaced.mp4':
> >     > > > >    Metadata:
> >     > > > >      major_brand     : isom
> >     > > > >      minor_version   : 512
> >     > > > >      compatible_brands: isomiso2mp41
> >     > > > >      encoder         : Lavf61.1.100
> >     > > > >    Duration: 00:01:11.16, start: 0.000000, bitrate: 1320 kb/s
> >     > > > >    Stream #0:0[0x1](und): Video: hevc (Rext) (hev1 /
> >     > > > > 0x31766568), yuv422p10le(pc, smpte170m/unknown/unknown,
> >     > > > > progressive), 1920x1080 [SAR 1:1 DAR 16:9], 1317 kb/s, 25 fps,
> >     > > > > 25 tbr, 12800 tbn (default)
> >     > > > >        Metadata:
> >     > > > >          handler_name    : VideoHandler
> >     > > > >          vendor_id       : [0][0][0][0]
> >     > > > >          encoder         : Lavc61.3.100 libx265
> >     > > > >  Stream mapping:
> >     > > > >    Stream #0:0 -> #0:0 (hevc (native) -> wrapped_avframe
> >     > > > > (native))
> >     > > > >  Press [q] to stop, [?] for help
> >     > > > >  [hevc @ 0x56422043e480] Failed setup for format vulkan:
> >     > > > > hwaccel initialisation returned error.
> >     > > > >  Output #0, null, to 'pipe:':
> >     > > > >    Metadata:
> >     > > > >      major_brand     : isom
> >     > > > >      minor_version   : 512
> >     > > > >      compatible_brands: isomiso2mp41
> >     > > > >      encoder         : Lavf61.1.100
> >     > > > >    Stream #0:0(und): Video: wrapped_avframe, yuv422p10le(pc,
> >     > > > > smpte170m/unknown/unknown, progressive), 1920x1080 [SAR
> >     1:1 DAR
> >     > > > > 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn (default)
> >     > > > >        Metadata:
> >     > > > >          handler_name    : VideoHandler
> >     > > > >          vendor_id       : [0][0][0][0]
> >     > > > >          encoder         : Lavc61.3.100 wrapped_avframe
> >     > > > >  [out#0/null @ 0x564220459f40] video:764KiB audio:0KiB
> >     > > > > subtitle:0KiB other streams:0KiB global headers:0KiB muxing
> >     > > > > overhead: unknown
> >     > > > >  frame= 1779 fps=790 q=-0.0 Lsize=N/A time=00:01:11.16
> >     > > > > bitrate=N/A speed=31.6x
> >     > > > >  bench: utime=13.717s stime=0.122s rtime=2.251s
> >     > > > >  bench: maxrss=418956KiB
> >     > > > >
> >     > > > >  ===================================
> >     > > > >
> >     > > >
> >     > > >
> >     > > > Can I see a full dump from vainfo? Want to confirm something
> >     > > >
> >     > > > >
> >     > >
> >     ....snip
> >     >
> >     >
> >     >
> >     > According to Intel's docs on libva, the rext HEVC profile is
> >     > supported for decoding in your libva build, yet it fails on your end
> >     > (DG2).
> >     > I'm referring to the notes on
> >     > https://github.com/intel/libva/blob/master/va/va_dec_hevc.h#L242,
> >     > implying that this is tied to VAProfileHEVCScc* profile
> >     entry-points.
> >     > The failing video signals HEVC rext as it's profile.
> >     > Perhaps an intel developer can take a look at this and assist?
> >     >
> >     > Copying some of them in the thread.
> >
> >     vainfo shows the supported entry points base on VAAPI. It doesn't mean
> >     vulkan also support them. You may use ffmpeg-vaapi to decode if you
> >     want:
> >     https://trac.ffmpeg.org/wiki/Hardware/VAAPI
> >
> >     And more supported codec/formats can be found in intel media-driver's
> >     wiki:
> >     https://github.com/intel/media-driver
> >
> >
> >     Thanks
> >     Fei
> >
>
> > Is there a way to list the video formats supported by Vulkan?
> >
> > ...........snip
>
>
> Fwiw I tried to decode my source 10-bit ProRes 422 HQ video file - and
> did not get the error output:
>
> ffmpeg -hide_banner -init_hw_device "vulkan=vk:0" -hwaccel vulkan
> -hwaccel_output_format vulkan -i hd01.mov -f null - -benchmark
> [aist#0:1/pcm_s24le @ 0x55d342fef940] Guessed Channel Layout: hexadecagonal
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'hd01.mov':
>    Metadata:
>      creation_time   : 2016-02-23T23:49:21.000000Z
>    Duration: 00:01:11.28, start: 0.000000, bitrate: 200496 kb/s
>    Stream #0:0[0x1](eng): Video: prores (HQ) (apch / 0x68637061),
> yuv422p10le(bt709, top coded first (swapped)), 1920x1080, 182130 kb/s,

bt709 is widely supported (on a lot of platforms) though.

> SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 2500 tbn (default)
>        Metadata:
>          creation_time   : 2016-02-23T23:49:21.000000Z
>          handler_name    : Apple Video Media Handler
>          vendor_id       : appl
>          encoder         : Apple ProRes 422 (HQ)
>    Stream #0:1[0x2](eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000
> Hz, hexadecagonal, s32 (24 bit), 18432 kb/s (default)
>        Metadata:
>          creation_time   : 2016-02-23T23:49:21.000000Z
>          handler_name    : Apple Sound Media Handler
>          vendor_id       : [0][0][0][0]
> Stream mapping:
>    Stream #0:0 -> #0:0 (prores (native) -> wrapped_avframe (native))
>    Stream #0:1 -> #0:1 (pcm_s24le (native) -> pcm_s16le (native))
> Press [q] to stop, [?] for help
> Output #0, null, to 'pipe:':
>    Metadata:
>      encoder         : Lavf61.1.100
>    Stream #0:0(eng): Video: wrapped_avframe, yuv422p10le(tv, bt709, top
> coded first (swapped)), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s,
> 25 fps, 25 tbn (default)
>        Metadata:
>          creation_time   : 2016-02-23T23:49:21.000000Z
>          handler_name    : Apple Video Media Handler
>          vendor_id       : appl
>          encoder         : Lavc61.3.100 wrapped_avframe
>    Stream #0:1(eng): Audio: pcm_s16le, 48000 Hz, hexadecagonal, s16,
> 12288 kb/s (default)
>        Metadata:
>          creation_time   : 2016-02-23T23:49:21.000000Z
>          handler_name    : Apple Sound Media Handler
>          vendor_id       : [0][0][0][0]
>          encoder         : Lavc61.3.100 pcm_s16le
> [out#0/null @ 0x55d343006f40] video:765KiB audio:106920KiB subtitle:0KiB
> other streams:0KiB global headers:0KiB muxing overhead: unknown
> frame= 1781 fps=707 q=-0.0 Lsize=N/A time=00:01:11.24 bitrate=N/A
> speed=28.3x
> bench: utime=36.467s stime=0.477s rtime=2.517s
> bench: maxrss=353584KiB


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