Warum ändert avconv die fps beim deinterlacen?

Ich habe ein .MTS 1080i mit 25fps (Mediainfo), mit dem ich deinterlaced habe avconv -i input.MTS -vf yadif -c:a copy output.mp4. Wie das Wiki sagt, ist der Standardwert für yadif 0, was "einen Frame für jeden Frame ausgibt" .

Meine Frage ist, warum hat output.mp450fps? Ist es auch normal, dass es viel kleiner als die Eingabe ist?

Wie gewünscht:

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: eine Kopie output.mp4
avconv version 0.8.16-6: 0.8.16-1, Copyright (c) 2000-2014 der Libav-Entwickler
  gebaut am 16.09.2014 23:10:48 mit gcc 4.7.2
Eingabe # 0, mpegts, von '00000.MTS':
  Dauer: 00: 00: 37.44, Start: 1.000033, Bitrate: 16506 kb / s
  Programm 1 
    Stream Nr. 0.0 [0x1011]: Video: h264 (Hoch), yuv420p, 1920 x 1080 [PAR 1: 1 DAR 16: 9], 50 fps, 50 tbr, 90 k tbn, 50 tbc
    Stream # 0.1 [0x1100]: Audio: ac3, 48000 Hz, Stereo, s16, 256 kb / s
    Stream # 0.2 [0x1200]: Untertitel: pgssub
[buffer @ 0xa5eb40] w: 1920 h: 1080 pixfmt: yuv420p
[yadif @ 0xa5cba0] Modus: 0 Parität: -1 auto_enable: 0
[libx264 @ 0xa59b00] mit SAR = 1/1
[libx264 @ 0xa59b00] mit CPU-Funktionen: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
[libx264 @ 0xa59b00] Profil Main, Ebene 4.2
[libx264 @ 0xa59b00] 264 - Kern 123 r2189 35cf912 - H.264 / MPEG-4 AVC-Codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - Optionen: 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':
  Metadaten:
    Encoder: Lavf53.21.1
    Stream Nr. 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-Zuordnung:
  Stream # 0: 0 -> # 0: 0 (h264 -> libx264)
  Stream # 0: 1 -> # 0: 1 (Kopie)
Drücken Sie Strg-C, um die Codierung zu beenden
Frame = 1870 fps = 16 q = -1,0 Lsize = 29093 kB Time = 37,38 Bitrate = 6375,8 kBits / s Dup = 935 Drop = 0    
Video: 27902 KB Audio: 1170 KB globale Header: 0 KB Muxing-Overhead 0.070776%
[libx264 @ 0xa59b00] Frame I: 122 Durchschn. QP: 22,47 Größe: 49023
[libx264 @ 0xa59b00] Frame P: 1748 Avg QP: 25.43 Größe: 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% Überspringen: 55,7%
[libx264 @ 0xa59b00] codiert 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] Gewichtete 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