Com o Media Player Classic (MPC-BE) estou ficando vermelhos processados de forma diferente depois de transcodificar um vídeo.
Estas culturas mostram o primeiro quadro usando. Se você olhar de perto a última foto é mais laranja-y
ffmpeg
para extrair um quadro do vídeo original
ffmpeg
no transcodificar é idêntico, portanto não é incluído explicitamente. Usando a função de instantâneo F5
no MPC-BE no original
Usando a função de instantâneo F5
no MPC-BE na transcodificação
Eu peguei um fluxo flv
e o converti em mkv
usando:
ffmpeg -i $i -c:v copy $i.mkv
Em seguida, transcodifiquei-o usando:
ffmpeg -i orig.flv.mkv -crf 20 -b:v 0 orig.flv.mkv.colortest.mkv
Eu também tentei -c:v libxvid
para substituir -crf 20 -b:v 0
e obtive os mesmos resultados.
Eu colei as informações que recebi do programa MediaInfo
abaixo.
Minhas opções de vídeo no MPC-BE são
Format : Matroska
Format version : Version 4 / Version 2
File size : 1.29 GiB
Duration : 18 min 14 s
Overall bit rate mode : Variable
Overall bit rate : 10.1 Mb/s
Writing application : Lavf56.40.101
Writing library : Lavf56.40.101
2.1 : false
3.1 : false
4.0 : false
4.1 : false
5.1 : false
7.1 : false
AUDIOCHANNELS : 2
FILESIZE : 0
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : [email protected]
Format settings : CABAC / 2 Ref Frames
Format settings, CABAC : Yes
Format settings, RefFrames : 2 frames
Format settings, GOP : M=3, N=47
Codec ID : V_MPEG4/ISO/AVC
Duration : 18 min 14 s
Bit rate mode : Constant
Bit rate : 10 000 kb/s
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 24.417 FPS
Original frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.444
Stream size : 1.25 GiB (97%)
Default : Yes
Forced : No
Color range : Limited
Matrix coefficients : BT.470 System B/G
Format : Matroska
Format_Version : Version 4 / Version 2
FileSize/String : 2.65 MiB
Duration/String : 13 s 107 ms
OverallBitRate_Mode/String : Variable
OverallBitRate/String : 1 696 kb/s
Encoded_Application/String : Lavf56.40.101
Encoded_Library/String : Lavf56.40.101
2.1 : false
3.1 : false
4.0 : false
4.1 : false
5.1 : false
7.1 : false
AUDIOCHANNELS : 2
FILESIZE : 0
Video
ID/String : 1
Format : AVC
Format/Info : Advanced Video Codec
Format_Profile : [email protected]
Format_Settings : CABAC / 4 Ref Frames
Format_Settings_CABAC/String : Yes
Format_Settings_RefFrames/String : 4 frames
CodecID : V_MPEG4/ISO/AVC
Duration/String : 12 s 860 ms
BitRate/String : 1 550 kb/s
Width/String : 1 280 pixels
Height/String : 720 pixels
DisplayAspectRatio/String : 16:9
FrameRate_Mode/String : Constant
FrameRate/String : 24.417 FPS
ColorSpace : YUV
ChromaSubsampling/String : 4:2:0
BitDepth/String : 8 bits
ScanType/String : Progressive
Bits-(Pixel*Frame) : 0.069
StreamSize/String : 2.38 MiB (90%)
Encoded_Library/String : x264 core 148 r2643 5c65704
Encoded_Library_Settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=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=9 / lookahead_threads=1 / 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=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=20.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Default/String : Yes
Forced/String : No