Eu tenho um .MTS 1080i de 25fps (mediainfo) que desentrelaço com avconv -i input.MTS -vf yadif -c:a copy output.mp4 . Como o wiki diz, o valor padrão para yadif é 0, o qual "gera um quadro para cada quadro" .
Minha pergunta é: por que output.mp4 tem 50fps?
Além disso, é normal que seja muito menor que a entrada?
Conforme solicitado:
wantoast@crunchbang:~/videos/video/videocamera$ avconv -i 00000.MTS
avconv version 0.8.16-6:0.8.16-1, Copyright (c) 2000-2014 the Libav developers
built on Sep 16 2014 23:10:48 with gcc 4.7.2
Input #0, mpegts, from '00000.MTS':
Duration: 00:00:37.44, start: 1.000033, bitrate: 16506 kb/s
Program 1
Stream #0.0[0x1011]: Video: h264 (High), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 50 tbc
Stream #0.1[0x1100]: Audio: ac3, 48000 Hz, stereo, s16, 256 kb/s
Stream #0.2[0x1200]: Subtitle: pgssub
At least one output file must be specified
wantoast@crunchbang:~/videos/video/videocamera$ avconv -i 00000.MTS -vf yadif -c:a copy output.mp4
avconv version 0.8.16-6:0.8.16-1, Copyright (c) 2000-2014 the Libav developers
built on Sep 16 2014 23:10:48 with gcc 4.7.2
Input #0, mpegts, from '00000.MTS':
Duration: 00:00:37.44, start: 1.000033, bitrate: 16506 kb/s
Program 1
Stream #0.0[0x1011]: Video: h264 (High), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 50 tbc
Stream #0.1[0x1100]: Audio: ac3, 48000 Hz, stereo, s16, 256 kb/s
Stream #0.2[0x1200]: Subtitle: pgssub
[buffer @ 0xa5eb40] w:1920 h:1080 pixfmt:yuv420p
[yadif @ 0xa5cba0] mode:0 parity:-1 auto_enable:0
[libx264 @ 0xa59b00] using SAR=1/1
[libx264 @ 0xa59b00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
[libx264 @ 0xa59b00] profile Main, level 4.2
[libx264 @ 0xa59b00] 264 - core 123 r2189 35cf912 - 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=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=0 b_adapt=1 b_bias=0 direct=1 weightb=0 open_gop=1 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.25 aq=1:1.00
Output #0, mp4, to 'output.mp4':
Metadata:
encoder : Lavf53.21.1
Stream #0.0: Video: libx264, yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], q=-1--1, 50 tbn, 50 tbc
Stream #0.1: Audio: ac3, 48000 Hz, stereo, 256 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> libx264)
Stream #0:1 -> #0:1 (copy)
Press ctrl-c to stop encoding
frame= 1870 fps= 16 q=-1.0 Lsize= 29093kB time=37.38 bitrate=6375.8kbits/s dup=935 drop=0
video:27902kB audio:1170kB global headers:0kB muxing overhead 0.070776%
[libx264 @ 0xa59b00] frame I:122 Avg QP:22.47 size: 49023
[libx264 @ 0xa59b00] frame P:1748 Avg QP:25.43 size: 12923
[libx264 @ 0xa59b00] mb I I16..4: 61.9% 0.0% 38.1%
[libx264 @ 0xa59b00] mb P I16..4: 2.8% 0.0% 0.5% P16..4: 36.5% 2.8% 1.7% 0.0% 0.0% skip:55.7%
[libx264 @ 0xa59b00] coded y,uvDC,uvAC intra: 38.5% 80.0% 19.8% inter: 7.1% 27.2% 0.2%
[libx264 @ 0xa59b00] i16 v,h,dc,p: 35% 18% 15% 31%
[libx264 @ 0xa59b00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 18% 35% 4% 3% 3% 4% 3% 2%
[libx264 @ 0xa59b00] i8c dc,h,v,p: 50% 18% 26% 6%
[libx264 @ 0xa59b00] Weighted P-Frames: Y:1.1% UV:0.7%
[libx264 @ 0xa59b00] ref P L0: 63.3% 9.7% 13.0% 13.9% 0.1%
[libx264 @ 0xa59b00] kb/s:6111.45
wantoast@crunchbang:~/videos/video/videocamera$ avconv -i output.mp4
avconv version 0.8.16-6:0.8.16-1, Copyright (c) 2000-2014 the Libav developers
built on Sep 16 2014 23:10:48 with gcc 4.7.2
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x216e460] multiple edit list entries, a/v desync might occur, patch welcome
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'output.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf53.21.1
Duration: 00:00:37.47, start: 0.000000, bitrate: 6358 kb/s
Stream #0.0(und): Video: h264 (Main), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 6111 kb/s, 50 fps, 50 tbr, 50 tbn, 100 tbc
Stream #0.1(und): Audio: ac3, 48000 Hz, stereo, s16, 256 kb/s
At least one output file must be specified