मेरे पास पीएनजी का एक क्रम है ( यहाँ एक नमूना है ) जिसे मैं ffmpeg के साथ एक वीडियो में बदल देता हूं:
ffmpeg -r 10 -i image%03d.png -s 1380x720 -c:v libx264 -qscale 10 -r 30
basf_merck_libx264.mp4
वीएलसी के साथ यह सब अच्छा और बांका लगता है, लेकिन यूट्यूब पर मुझे लगता है कि सभी ग्रे है !? क्यों?
थोड़ी देर बाद रंगीन स्थानों के साथ एक क्षैतिज पट्टी दिखाई जाती है:
जब मैं कमांड में '-pix_fmt yuv420p' जोड़ता हूं तब youtube क्लिप को सही तरीके से दिखाता है। लेकिन तब मैं जो उच्चतम गुणवत्ता चुन सकता हूं वह 480p है जो इस उद्देश्य के लिए कम है।
ffmpeg आउटपुट
C:\Users\Raffael\Documents\proj>ffmpeg -r 10 -i image%03d.png -s 1380x720 -c:v libx264 -qscale 10 -r 30 basf_merck_libx264.mp4
ffmpeg version N-48785-g2ea3f37 Copyright (c) 2000-2013 the FFmpeg developers
built on Jan 12 2013 20:45:33 with gcc 4.7.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu
tls --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-l
ibopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libtwol
ame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
--enable-filter=frei0r
libavutil 52. 14.100 / 52. 14.100
libavcodec 54. 86.100 / 54. 86.100
libavformat 54. 59.107 / 54. 59.107
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 32.100 / 3. 32.100
libswscale 2. 1.103 / 2. 1.103
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, image2, from 'image%03d.png':
Duration: 00:00:02.04, start: 0.000000, bitrate: N/A
Stream #0:0: Video: png, rgb24, 1380x720, 25 fps, 25 tbr, 25 tbn, 25 tbc
Please use -q:a or -q:v, -qscale is ambiguous
File 'basf_merck_libx264.mp4' already exists. Overwrite ? [y/N] y
using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle Cache64
[libx264 @ 00000000021c6fe0] profile High 4:4:4 Predictive, level 3.2, 4:4:4 8-bit
[libx264 @ 00000000021c6fe0] 264 - core 129 r2230 1cffe9f - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options:
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 dead
zone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_int
ra=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_lookahea
d=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'basf_merck_libx264.mp4':
Metadata:
encoder : Lavf54.59.107
Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv444p, 1380x720, q=-1--1, 15360 tbn, 30 tbc
Stream mapping:
Stream #0:0 -> #0:0 (png -> libx264)
Press [q] to stop, [?] for help
frame= 151 fps= 16 q=-1.0 Lsize= 1995kB time=00:00:04.96 bitrate=3290.5kbits/s dup=100 drop=0
video:1992kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.127092%
[libx264 @ 00000000021c6fe0] frame I:1 Avg QP:22.19 size: 57949
[libx264 @ 00000000021c6fe0] frame P:54 Avg QP:26.90 size: 36277
[libx264 @ 00000000021c6fe0] frame B:96 Avg QP:21.56 size: 236
[libx264 @ 00000000021c6fe0] consecutive B-frames: 5.3% 1.3% 85.4% 7.9%
[libx264 @ 00000000021c6fe0] mb I I16..4: 71.1% 2.5% 26.4%
[libx264 @ 00000000021c6fe0] mb P I16..4: 0.6% 0.5% 5.7% P16..4: 3.1% 2.1% 2.9% 0.0% 0.0% skip:85.0%
[libx264 @ 00000000021c6fe0] mb B I16..4: 0.2% 0.1% 0.0% B16..8: 4.7% 0.1% 0.0% direct: 0.0% skip:94.9% L0:77.6% L1:22.3% BI: 0.1%
[libx264 @ 00000000021c6fe0] 8x8 transform intra:7.7% inter:5.2%
[libx264 @ 00000000021c6fe0] coded y,u,v intra: 59.5% 54.3% 52.9% inter: 1.3% 1.0% 0.6%
[libx264 @ 00000000021c6fe0] i16 v,h,dc,p: 81% 15% 4% 0%
[libx264 @ 00000000021c6fe0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 5% 64% 3% 2% 4% 3% 4% 3%
[libx264 @ 00000000021c6fe0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 13% 21% 7% 6% 7% 6% 7% 6%
[libx264 @ 00000000021c6fe0] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 00000000021c6fe0] ref P L0: 65.3% 9.0% 20.2% 5.5%
[libx264 @ 00000000021c6fe0] ref B L0: 73.0% 21.7% 5.3%
[libx264 @ 00000000021c6fe0] ref B L1: 90.8% 9.2%
[libx264 @ 00000000021c6fe0] kb/s:3241.64
मैंने अपनी वेब-साइट: http://www.joyofdata.de/blog/hd-clips-with-ffmpeg-for-youtube-and-vimeo/ पर जानकारी एकत्र की