[FFmpeg-trac] #7300(undetermined:new): h264_nvenc / weighted_pred not working with B Frame parameter
FFmpeg
trac at avcodec.org
Tue Sep 4 10:36:22 EEST 2018
#7300: h264_nvenc / weighted_pred not working with B Frame parameter
-------------------------------------+-------------------------------------
Reporter: | Owner:
smallishzulu | Status: new
Type: defect | Component:
Priority: normal | undetermined
Version: unspecified | Resolution:
Keywords: nvenc | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by smallishzulu):
Official NVIDIA reply over their ticket system.
Using weighted prediction along with B-frames is currently not supported.
The relevant comment from the EncodeAPI header file is
uint32_t enableWeightedPrediction
:1; /**< [in]: Set this to 1 to enable weighted prediction. Not
supported if encode session is configured for B-Frames( 'frameIntervalP'
in NV_ENC_CONFIG is greater than 1).*/
, so the current behaviour is not a bug.
However, when I try the same command without -bf 2:
/opt/ffmpeg/bin/ffmpeg -loglevel verbose -re -i /home/admintv/big-buck-
bunny_294_1280x720.mp4 -aspect 16:9 -s 720x576 -map 0:0 -c:v:0
h264_nvenc -temporal-aq 1 -spat
ial-aq 1 -aq-strength 15 -2pass 1 -preset slow -cbr 1 -rc cbr -profile:v
main -vb 1550k -minrate 1550k -maxrate 1550k -bufsize 1550k -muxrate
1790k -flags +ilme+ildct -top 1 -r 25 -pix_fmt
yuv420p -map 0:1 -c:a:0 aac -b:a:0 128k -g 50 -f mpegts -weighted_pred 1
'udp://192.168.2.100:5000?pkt_size=188'
ffmpeg version N-91062-gf995aa8 Copyright (c) 2000-2018 the FFmpeg
developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
configuration: --prefix=/opt/ffmpeg --enable-nonfree --enable-gpl
--extra-cflags='-I/opt/ffmpeg/include -I/usr/local/include
-I/usr/local/cuda/include -I/opt/ndi/sdk/include' --extra-ldflags='-L/
opt/ffmpeg/lib -L/usr/local/cuda/lib64 -L/opt/ndi/sdk/lib'
--bindir=/opt/ffmpeg/bin --extra-libs=-ldl --enable-libx264 --enable-
libx265 --enable-nonfree --enable-gpl --enable-nvenc --enable-libzvbi
--enable-libfdk-aac --enable-libzimg --enable-libzmq --enable-libfreetype
--enable-static --enable-shared --enable-hardcoded-tables --enable-vdpau
--enable-cuda --enable-cuvid --enable-libvpx --en
able-libmp3lame --enable-libndi_newtek --enable-openssl --enable-ffnvcodec
--enable-libfontconfig --enable-libfribidi --enable-cuda-sdk --enable-
libnpp
libavutil 56. 18.102 / 56. 18.102
libavcodec 58. 19.101 / 58. 19.101
libavformat 58. 13.102 / 58. 13.102
libavdevice 58. 4.100 / 58. 4.100
libavfilter 7. 22.100 / 7. 22.100
libswscale 5. 2.100 / 5. 2.100
libswresample 3. 2.100 / 3. 2.100
libpostproc 55. 2.100 / 55. 2.100
[h264 @ 0x228d680] Reinit context to 1280x720, pix_fmt: yuv420p
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/admintv/big-buck-
bunny_294_1280x720.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: mp41
creation_time : 1970-01-01T00:00:00.000000Z
title : Big Buck Bunny
encoder : Lavf52.13.0
Duration: 00:09:56.46, start: 0.000000, bitrate: 2353 kb/s
Stream #0:0(und): Video: h264 (Constrained Baseline), 1 reference
frame (avc1 / 0x31637661), yuv420p(left), 1280x720 [SAR 1:1 DAR 16:9],
2220 kb/s, 24 fps, 24 tbr, 24 tbn, 48 tbc (default)
Metadata:
creation_time : 1970-01-01T00:00:00.000000Z
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 127 kb/s (default)
Metadata:
creation_time : 1970-01-01T00:00:00.000000Z
handler_name : SoundHandler
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (h264_nvenc))
Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[h264 @ 0x239cf80] Reinit context to 1280x720, pix_fmt: yuv420p
[graph_1_in_0_1 @ 0x25f1ac0] tb:1/48000 samplefmt:fltp samplerate:48000
chlayout:0x3
[graph 0 input from stream 0:0 @ 0x2c10e00] w:1280 h:720 pixfmt:yuv420p
tb:1/24 fr:24/1 sar:1/1 sws_param:flags=2
[scaler_out_0_0 @ 0x2c12180] w:720 h:576 flags:'bicubic' interl:0
[scaler_out_0_0 @ 0x2c12180] w:1280 h:720 fmt:yuv420p sar:1/1 -> w:720
h:576 fmt:yuv420p sar:64/45 flags:0x4
[h264_nvenc @ 0x228f440] Loaded Nvenc version 8.1
[h264_nvenc @ 0x228f440] Nvenc initialized successfully
[h264_nvenc @ 0x228f440] 1 CUDA capable devices found
[h264_nvenc @ 0x228f440] [ GPU #0 - < GeForce GTX 1080 > has Compute SM
6.1 ]
[h264_nvenc @ 0x228f440] supports NVENC
[h264_nvenc @ 0x228f440] AQ enabled.
[h264_nvenc @ 0x228f440] Temporal AQ enabled.
[mpegts @ 0x22b6180] muxrate 1790000, pcr every 23 pkts, sdt every 595,
pat/pmt every 119 pkts
Output #0, mpegts, to 'udp://192.168.2.100:5000?pkt_size=188':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: mp41
title : Big Buck Bunny
encoder : Lavf58.13.102
Stream #0:0(und): Video: h264 (h264_nvenc) (Main), 1 reference frame,
yuv420p(top first, left), 720x576 [SAR 64:45 DAR 16:9], q=-1--1, 1550
kb/s, 25 fps, 90k tbn, 25 tbc (default)
Metadata:
creation_time : 1970-01-01T00:00:00.000000Z
handler_name : VideoHandler
encoder : Lavc58.19.101 h264_nvenc
Side data:
cpb: bitrate max/min/avg: 1550000/0/1550000 buffer size: 1550000
vbv_delay: -1
Stream #0:1(und): Audio: aac (LC), 48000 Hz, stereo, fltp, delay 1024,
128 kb/s (default)
Metadata:
creation_time : 1970-01-01T00:00:00.000000Z
handler_name : SoundHandler
encoder : Lavc58.19.101 aac
[h264_nvenc @ 0x228f440] Failed locking bitstream buffer: invalid param
(8)its/s speed=0.479x
Video encoding failed
So waiting for their upcoming reply.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/7300#comment:3>
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