[FFmpeg-trac] #2404(FFmpeg:new): When the video with "white background" the display is gray
FFmpeg
trac at avcodec.org
Tue Mar 26 07:21:37 CET 2013
#2404: When the video with "white background" the display is gray
-------------------------------------+-------------------------------------
Reporter: Ken_JJ | Type: defect
Status: new | Priority: important
Component: FFmpeg | Version: 1.2
Keywords: white | Blocked By:
background | Reproduced by developer: 0
Blocking: |
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
I use ffmpeg to encode Tv singal,when the video background is white,the
image will display gray (the image will full white with some black line).
How to reproduce:
{{{
ffmpeg -f video4linux2 -s 720:480 -i /dev/video0 -f alsa -i hw:0,0 -vcodec
libx264 -pix_fmt yuv420p -acodec libfaac -b:v 4000k -b:a 128k mytest.mp4
ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
built on Mar 25 2013 15:32:48 with gcc 4.6 (Ubuntu/Linaro
4.6.3-1ubuntu5)
configuration: --enable-version3 --enable-libopencore-amrnb --enable-
libopencore-amrwb --enable-libvpx --enable-libfaac --enable-libmp3lame
--enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid
--enable-gpl --enable-postproc --enable-nonfree --enable-network --enable-
protocol=tcp --enable-demuxer=rtsp --enable-decoder=h264 --enable-zlib
libavutil 52. 18.100 / 52. 18.100
libavcodec 54. 92.100 / 54. 92.100
libavformat 54. 63.104 / 54. 63.104
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 42.103 / 3. 42.103
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
[video4linux2,v4l2 @ 0x214a5a0] Estimating duration from bitrate, this may
be inaccurate
Input #0, video4linux2,v4l2, from '/dev/video0':
Duration: N/A, start: 1364276769.068877, bitrate: 165722 kb/s
Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x480,
165722 k b/s, 29.97 fps, 29.97 tbr, 1000k tbn, 1000k tbc
[alsa @ 0x214be60] Estimating duration from bitrate, this may be
inaccurate Guessed Channel Layout for Input Stream #1.0 : stereo
Input #1, alsa, from 'hw:0,0':
Duration: N/A, start: 1364276769.073010, bitrate: 1536 kb/s
Stream #1:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
[libx264 @ 0x215d2c0] using cpu capabilities: MMX2 SSE2Fast SSSE3
FastShuffle SSE4.2 AVX
[libx264 @ 0x215d2c0] profile High, level 3.0
[libx264 @ 0x215d2c0] 264 - core 129 - H.264/MPEG-4 AVC codec - Copyleft
2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3
deblock=1:0:0 an alyse=0x3:0x113 me=hex subme=7 psy=1
psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1
cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=36
lookahead_threads=6 sliced_threads=0 nr=0 decimate=1 interlaced=0
bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1
b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25
scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=4000
ratetol=1.0 qcomp=0.60 min=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'mytest.mp4':
Metadata:
encoder : Lavf54.63.104
Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 720x480,
q=-1--1, 4000 kb/s, 30k tbn, 29.97 tbc
Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, stereo,
s16, 128kb/s
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo -> libx264)
Stream #1:0 -> #0:1 (pcm_s16le -> libfaac)
Press [q] to stop, [?] for help
frame= 17 fps=0.0 q=0.0 size= 0kB time=00:00:00.42 bitrate=
0.9kbits/s frame= 32
fps= 32 q=0.0 size= 0kB time=00:00:00.94 bitrate= 0.4kbits/s
frame= 47 fps= 31 q=0.0 size= 0kB time=00:00:01.43 bitrate=
0.3kbits/s frame=
62 fps= 31 q=0.0 size= 0kB time=00:00:01.92 bitrate= 0.2kbits/s
frame= 70 fps= 24 q=32766.0 Lsize= 966kB time=00:00:02.30
bitrate=3432.8kb its/s video:926kB audio:36kB subtitle:0 global
headers:0kB muxing overhead 0.475477%
[libx264 @ 0x215d2c0] frame I:1 Avg QP:14.29 size: 86439
[libx264 @ 0x215d2c0] frame P:19 Avg QP:16.92 size: 28464
[libx264 @ 0x215d2c0] frame B:50 Avg QP:20.94 size: 6410
[libx264 @ 0x215d2c0] consecutive B-frames: 2.9% 0.0% 17.1% 80.0%
[libx264 @ 0x215d2c0] mb I I16..4: 8.7% 52.1% 39.2%
[libx264 @ 0x215d2c0] mb P I16..4: 0.5% 3.6% 1.1% P16..4: 38.1% 28.9%
20.2% 0.0% 0.0% skip: 7.6%
[libx264 @ 0x215d2c0] mb B I16..4: 0.1% 0.0% 0.0% B16..8: 40.1% 6.7%
1.7% direct: 8.1% skip:43.2% L0:34.1% L1:51.3% BI:14.7%
[libx264 @ 0x215d2c0] final ratefactor: 12.79
[libx264 @ 0x215d2c0] 8x8 transform intra:59.6% inter:59.4%
[libx264 @ 0x215d2c0] coded y,uvDC,uvAC intra: 91.2% 91.3% 79.5% inter:
30.5% 41.7% 19.9%
[libx264 @ 0x215d2c0] i16 v,h,dc,p: 18% 37% 2% 42%
[libx264 @ 0x215d2c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 24% 11% 4% 6%
8% 7% 7% 11%
[libx264 @ 0x215d2c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 31% 8% 5% 7%
7% 8% 6% 9%
[libx264 @ 0x215d2c0] i8c dc,h,v,p: 38% 32% 19% 12%
[libx264 @ 0x215d2c0] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x215d2c0] ref P L0: 52.3% 12.3% 27.6% 7.7%
[libx264 @ 0x215d2c0] ref B L0: 83.8% 14.2% 2.0%
[libx264 @ 0x215d2c0] ref B L1: 90.3% 9.7%
[libx264 @ 0x215d2c0] kb/s:3246.24
Received signal 2: terminating.
}}}
Patches should be submitted to the ffmpeg-devel mailing list and not this
bug tracker.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2404>
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