[FFmpeg-trac] #5821(avcodec:new): jerky result when using hevc_vaapi encoding on Skylake cpu
FFmpeg
trac at avcodec.org
Tue Oct 25 14:09:35 EEST 2016
#5821: jerky result when using hevc_vaapi encoding on Skylake cpu
-------------------------------------+-------------------------------------
Reporter: trivita | Owner:
Type: defect | Status: new
Priority: normal | Component: avcodec
Version: git-master | Resolution:
Keywords: h265, hevc, | Blocked By:
vaapi | Reproduced by developer: 0
Blocking: |
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by mani):
Hi
Did you resolve this, i am struggling with the same problem and am
attaching the mediainfo of the input and the jerky output got through
hevc_vaapi. If this is not yet resolved can anybody please have a look
into this and see if more experienced people can find the issue.
'''the input file from mediainfo'''
{{{
mediainfo input.mp4
General
Complete name : input.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 11.2 GiB
Duration : 3h 8mn
Overall bit rate mode : Variable
Overall bit rate : 8 496 Kbps
Encoded date : UTC 1904-01-01 00:00:00
Tagged date : UTC 1904-01-01 00:00:00
Writing application : Lavf56.40.101
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High at L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 3h 8mn
Bit rate mode : Variable
Bit rate : 8 361 Kbps
Maximum bit rate : 35.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 24.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.168
Stream size : 11.0 GiB (98%)
Writing library : x264 core
Encoded date : UTC 1904-01-01 00:00:00
Tagged date : UTC 1904-01-01 00:00:00
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 3h 8mn
Duration_LastFrame : -11ms
Bit rate mode : Constant
Bit rate : 128 Kbps
Channel(s) : 2 channels
Channel(s)_Original : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Frame rate : 46.875 fps (1024 spf)
Compression mode : Lossy
Stream size : 173 MiB (2%)
Default : Yes
Alternate group : 1
Encoded date : UTC 1904-01-01 00:00:00
Tagged date : UTC 1904-01-01 00:00:00
}}}
'''Encoded file using hevc_vaapi from mediainfo'''
{{{
$ mediainfo output.mp4
General
Complete name : output.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/mp41)
File size : 5.51 MiB
Duration : 25s 259ms
Overall bit rate mode : Variable
Overall bit rate : 1 830 Kbps
Encoded date : UTC 1904-01-01 00:00:00
Tagged date : UTC 1904-01-01 00:00:00
Writing application : Lavf57.48.102
Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Codec ID : hev1
Codec ID/Info : High Efficiency Video Coding
Duration : 25s 42ms
Bit rate : 1 659 Kbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 24.000 fps
Scan type : Progressive
Bits/(Pixel*Frame) : 0.033
Stream size : 4.95 MiB (90%)
Encoded date : UTC 1904-01-01 00:00:00
Tagged date : UTC 1904-01-01 00:00:00
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 25s 259ms
Bit rate mode : Variable
Bit rate : 180 Kbps
Maximum bit rate : 341 Kbps
Channel(s) : 2 channels
Channel(s)_Original : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Frame rate : 46.875 fps (1024 spf)
Compression mode : Lossy
Stream size : 554 KiB (10%)
Default : Yes
Alternate group : 1
Encoded date : UTC 1904-01-01 00:00:00
Tagged date : UTC 1904-01-01 00:00:00
}}}
Thanks
Mani
--
Ticket URL: <https://trac.ffmpeg.org/ticket/5821#comment:2>
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