[請問] 這兩個檔案畫質會有明顯差別嗎?
我有兩個檔,A B
因為想要節省硬碟空間,
所以我用格式工廠轉小一點,設定轉成avi,code選H264,其他選項都是預設
用mediainfo分析
A 原來的檔
format : AVI
Format/Info : Audio Video Interleave
File size : 1 000 MiB
Duration : 13mn 37s
Overall bit rate : 10.3 Mbps
Writing application : VirtualDub 1.4.7
Writing library : Nandub build 1853/release
Video
ID : 0
Format : MPEG-4 Visual
Format profile : Simple@L3
Format settings, BVOP : Yes
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default (H.263)
Codec ID : XVID
Codec ID/Hint : XviD
Duration : 13mn 37s
Bit rate : 10.1 Mbps
Width : 1 440 pixels
Height : 1 080 pixels
Display aspect ratio : 4:3
Frame rate : 30.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.217
Stream size : 986 MiB (99%)
A轉檔後的檔
Format : AVI
Format/Info : Audio Video Interleave
File size : 748 MiB
Duration : 13mn 36s
Overall bit rate : 7 678 Kbps
Writing application : MEncoder SVN-r30881(20100311-gcc4.3.3)
Writing library : MPlayer
Video
ID : 0
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.0
Format settings, CABAC : No
Format settings, ReFrames : 1 frame
Codec ID : avc1
Duration : 13mn 36s
Bit rate : 7 776 Kbps
Width : 1 440 pixels
Height : 1 080 pixels
Display aspect ratio : 4:3
Frame rate : 30.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.167
Stream size : 734 MiB (98%)
Writing library : x264 core 80 r1378+57 6f6b50a
Encoding settings : cabac=0 / ref=1 / deblock=1:0:0 /
analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.0:0.0 / mixed_ref=0 /
me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=1 / cqm=0 / deadzone=21,11 /
fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / sliced_threads=0 / nr=0 /
decimate=1 / mbaff=0 / constrained_intra=0 / bframes=0 / wpredp=2 /
keyint=250 / keyint_min=25 / scenecut=40 / rc_lookahead=40 / rc=abr /
mbtree=1 / bitrate=7776 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 /
qpstep=4 / ip_ratio=1.40 /
B檔原來的
Format : AVI
Format/Info : Audio Video Interleave
Format profile : OpenDML
File size : 3.00 GiB
Duration : 1h 51mn
Overall bit rate : 3 835 Kbps
Writing application : PotEncoder
Video
ID : 0
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.0
Format settings, CABAC : Yes
Format settings, ReFrames : 1 frame
Codec ID : H264
Duration : 1h 51mn
Bit rate : 3 758 Kbps
Nominal bit rate : 2 800 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 29.970 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.136
Stream size : 2.94 GiB (98%)
Writing library : x264 core 65
Encoding settings : cabac=1 / ref=1 / deblock=1:0:0 /
analyse=0x3:0x133 / me=dia / subme=1 / psy_rd=0.0:0.0 / mixed_ref=0 /
me_range=4 / chroma_me=0 / trellis=0 / 8x8dct=1 / cqm=0 / deadzone=21,11 /
chroma_qp_offset=0 / threads=4 / nr=1 / decimate=1 / mbaff=0 / bframes=0 /
keyint=290 / keyint_min=25 / scenecut=0(pre) / rc=abr / bitrate=2800 /
ratetol=1.0 / qcomp=0.50 / qpmin=2 / qpmax=31 / qpstep=3 / ip_ratio=1.25 /
aq=0
B檔轉檔後是
Format : AVI
Format/Info : Audio Video Interleave
Format profile : OpenDML
File size : 2.02 GiB
Duration : 1h 51mn
Overall bit rate : 2 583 Kbps
Writing application : MEncoder SVN-r30881(20100311-gcc4.3.3)
Writing library : MPlayer
Video
ID : 0
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.0
Format settings, CABAC : No
Format settings, ReFrames : 1 frame
Codec ID : avc1
Duration : 1h 51mn
Bit rate : 2 475 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 29.970 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.090
Stream size : 1.91 GiB (95%)
Writing library : x264 core 80 r1378+57 6f6b50a
Encoding settings : cabac=0 / ref=1 / deblock=1:0:0 /
analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.0:0.0 / mixed_ref=0 /
me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=1 / cqm=0 / deadzone=21,11 /
fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / sliced_threads=0 / nr=0 /
decimate=1 / mbaff=0 / constrained_intra=0 / bframes=0 / wpredp=2 /
keyint=250 / keyint_min=25 / scenecut=40 / rc_lookahead=40 / rc=abr /
mbtree=1 / bitrate=2475 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 /
qpstep=4 / ip_ratio=1.40 / aq=1:1.00
想請問後來的檔,在畫質上會明顯輸給原來的檔嗎?
因為我現在是用19吋的螢幕,但日後可能會換22-24吋的,
現在是看不出來有什麼差別,不知道以後換新螢幕時,會看起來變差嗎?
謝謝
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◆ From: 59.104.231.143
推
11/09 15:57, , 1F
11/09 15:57, 1F
我知道轉檔後,畫質一定會比較差,我現在看不出差別
但是如果日後換大一點的螢幕時,
原檔跟新檔也看不出來差在哪裏的話,就想留小一點的新檔就好
不然外接硬碟一個一個的買,也是個無底洞
※ 編輯: allamanda 來自: 59.104.231.143 (11/09 16:06)
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