Ich nehme Audio/Video auf meiner Website mit einer Flash-Anwendung über den Red5-Server auf und die generierte Ausgabe enthält zusätzliche 30 Sekunden an eingefrorenen Abschnitten.
Ich habe das Video mit ffmpeg überprüft und festgestellt, dass die ersten 30 Sekunden 0 kB enthalten. Gibt es eine Möglichkeit, die 0-kB-Teile aus dem aufgezeichneten Video zu entfernen?
ffmpeg -i vid3.flv -qscale 0 -async 1 -ar 22050 -vcodec libx264 vid3.mp4
ffmpeg version N-56663-g851a6e2 Copyright (c) 2000-2013 the FFmpeg developers
built on Sep 25 2013 18:02:05 with gcc 4.8.1 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa
cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavp
ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 52. 46.100 / 52. 46.100
libavcodec 55. 33.100 / 55. 33.100
libavformat 55. 18.102 / 55. 18.102
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 87.100 / 3. 87.100
libswscale 2. 5.100 / 2. 5.100
libswresample 0. 17.103 / 0. 17.103
libpostproc 52. 3.100 / 52. 3.100
[flv @ 026b99e0] Stream discovered after head already parsed
Input #0, flv, from 'vid3.flv':
Metadata:
canSeekToEnd : false
createdby : AMS 5
creationdate : Thu Dec 05 16:58:09 2013
Duration: 00:00:15.92, start: 0.000000, bitrate: 1151 kb/s
Stream #0:0: Video: flv1, yuv420p, 600x338, 1k tbr, 1k tbn, 1k tbc
Stream #0:1: Audio: nellymoser, 11025 Hz, mono, flt
Stream #0:2: Data: none
Please use -q:a or -q:v, -qscale is ambiguous
File 'vid3.mp4' already exists. Overwrite ? [y/N] y
-async is forwarded to lavfi similarly to -af aresample=async=1:min_hard_comp=0.
100000:first_pts=0.
[libx264 @ 03b0fbc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 03b0fbc0] profile High, level 5.1
[libx264 @ 03b0fbc0] 264 - core 135 r2345 f0c1c53 - H.264/MPEG-4 AVC codec - Cop
yleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deb
lock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 m
e_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chro
ma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 i
nterlaced=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=25 scenec
ut=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=1.40 aq=1:1.00
Output #0, mp4, to 'vid3.mp4':
Metadata:
canSeekToEnd : false
createdby : AMS 5
creationdate : Thu Dec 05 16:58:09 2013
encoder : Lavf55.18.102
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 600x33
8, q=-1--1, 16k tbn, 1k tbc
Stream #0:1: Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 22050 Hz, m
ono, s16, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (flv -> libx264)
Stream #0:1 -> #0:1 (nellymoser -> libvo_aacenc)
Press [q] to stop, [?] for help
Hier sind die zusätzlichen Abschnitte:
frame= 191 fps=0.0 q=33.0 size= 0kB time=00:00:00.13 bitrate= 2.8kbits/
frame= 288 fps=221 q=33.0 size= 0kB time=00:00:00.23 bitrate= 1.6kbits/
frame= 416 fps=206 q=33.0 size= 0kB time=00:00:00.36 bitrate= 1.1kbits/
frame= 528 fps=195 q=33.0 size= 0kB time=00:00:00.47 bitrate= 0.8kbits/
frame= 667 fps=201 q=33.0 size= 0kB time=00:00:00.61 bitrate= 0.6kbits/
frame= 780 fps=193 q=33.0 size= 0kB time=00:00:00.72 bitrate= 0.5kbits/
frame= 899 fps=194 q=33.0 size= 0kB time=00:00:00.84 bitrate= 0.5kbits/
frame= 1011 fps=189 q=33.0 size= 0kB time=00:00:00.95 bitrate= 0.4kbits/
frame= 1139 fps=190 q=33.0 size= 0kB time=00:00:01.08 bitrate= 0.4kbits/
frame= 1249 fps=188 q=33.0 size= 0kB time=00:00:01.19 bitrate= 0.3kbits/
frame= 1376 fps=190 q=33.0 size= 0kB time=00:00:01.32 bitrate= 0.3kbits/
frame= 1493 fps=187 q=33.0 size= 0kB time=00:00:01.44 bitrate= 0.3kbits/
frame= 1616 fps=187 q=33.0 size= 0kB time=00:00:01.56 bitrate= 0.2kbits/
frame= 1728 fps=186 q=33.0 size= 0kB time=00:00:01.67 bitrate= 0.2kbits/
Später geht es weiter mit:
frame= 3432 fps=349 q=33.0 size= 1kB time=00:00:03.38 bitrate= 3.6kbits/
frame= 3432 fps=205 q=33.0 size= 17kB time=00:00:03.38 bitrate= 40.9kbits/
frame= 3559 fps=205 q=33.0 size= 56kB time=00:00:03.50 bitrate= 131.2kbits/
frame= 3645 fps=204 q=33.0 size= 77kB time=00:00:03.59 bitrate= 175.2kbits/
frame= 3801 fps=205 q=33.0 size= 113kB time=00:00:03.74 bitrate= 247.8kbits/
frame= 3886 fps=202 q=33.0 size= 159kB time=00:00:03.83 bitrate= 340.1kbits/
frame= 4043 fps=204 q=33.0 size= 203kB time=00:00:03.99 bitrate= 416.6kbits/
frame= 4132 fps=201 q=33.0 size= 267kB time=00:00:04.08 bitrate= 536.3kbits/
frame= 4241 fps=201 q=33.0 size= 321kB time=00:00:04.18 bitrate= 627.4kbits/
frame= 4401 fps=201 q=33.0 size= 342kB time=00:00:04.34 bitrate= 644.4kbits/
frame= 4486 fps=200 q=33.0 size= 365kB time=00:00:04.43 bitrate= 673.7kbits/
frame= 4611 fps=200 q=33.0 size= 385kB time=00:00:04.55 bitrate= 692.6kbits/
frame= 4774 fps=201 q=33.0 size= 404kB time=00:00:04.72 bitrate= 701.7kbits/
frame= 4845 fps=199 q=33.0 size= 427kB time=00:00:04.79 bitrate= 729.9kbits/
frame= 4970 fps=199 q=33.0 size= 444kB time=00:00:04.91 bitrate= 740.1kbits/
frame= 5079 fps=199 q=33.0 size= 509kB time=00:00:05.02 bitrate= 829.6kbits/
frame= 5215 fps=199 q=33.0 size= 580kB time=00:00:05.16 bitrate= 920.8kbits/
frame= 5323 fps=198 q=33.0 size= 610kB time=00:00:05.27 bitrate= 948.7kbits/
frame= 5448 fps=198 q=33.0 size= 677kB time=00:00:05.39 bitrate=1027.5kbits/
frame= 5569 fps=199 q=33.0 size= 687kB time=00:00:05.51 bitrate=1020.6kbits/
frame= 5643 fps=198 q=33.0 size= 745kB time=00:00:05.59 bitrate=1091.6kbits/
frame= 5779 fps=197 q=33.0 size= 809kB time=00:00:05.72 bitrate=1157.5kbits/
frame= 5888 fps=198 q=33.0 size= 850kB time=00:00:05.83 bitrate=1192.7kbits/
frame= 6006 fps=198 q=33.0 size= 902kB time=00:00:05.95 bitrate=1240.4kbits/
frame= 6124 fps=198 q=33.0 size= 934kB time=00:00:06.07 bitrate=1260.0kbits/
frame= 6249 fps=197 q=33.0 size= 951kB time=00:00:06.19 bitrate=1256.5kbits/
frame= 6341 fps=197 q=33.0 size= 962kB time=00:00:06.28 bitrate=1253.5kbits/
frame= 6454 fps=197 q=33.0 size= 985kB time=00:00:06.40 bitrate=1260.9kbits/
frame= 6581 fps=197 q=33.0 size= 1008kB time=00:00:06.52 bitrate=1265.1kbits/
frame= 6690 fps=197 q=33.0 size= 1041kB time=00:00:06.66 bitrate=1280.0kbits/
frame= 6817 fps=196 q=33.0 size= 1055kB time=00:00:06.76 bitrate=1277.3kbits/
frame= 6926 fps=196 q=33.0 size= 1084kB time=00:00:06.89 bitrate=1287.6kbits/
frame= 7063 fps=196 q=33.0 size= 1105kB time=00:00:07.03 bitrate=1286.8kbits/
frame= 7175 fps=196 q=33.0 size= 1130kB time=00:00:07.12 bitrate=1299.4kbits/
frame= 7262 fps=196 q=33.0 size= 1144kB time=00:00:07.21 bitrate=1298.5kbits/
frame= 7372 fps=196 q=33.0 size= 1169kB time=00:00:07.32 bitrate=1307.7kbits/
frame= 7498 fps=195 q=33.0 size= 1189kB time=00:00:07.45 bitrate=1307.1kbits/
frame= 7620 fps=195 q=33.0 size= 1219kB time=00:00:07.59 bitrate=1315.3kbits/
frame= 7745 fps=195 q=33.0 size= 1229kB time=00:00:07.69 bitrate=1309.2kbits/
frame= 7857 fps=195 q=33.0 size= 1260kB time=00:00:07.82 bitrate=1319.6kbits/
frame= 7979 fps=195 q=33.0 size= 1273kB time=00:00:07.92 bitrate=1315.1kbits/
frame= 8068 fps=195 q=33.0 size= 1287kB time=00:00:08.01 bitrate=1314.9kbits/
frame= 8217 fps=195 q=33.0 size= 1324kB time=00:00:08.16 bitrate=1328.3kbits/
frame= 8335 fps=195 q=33.0 size= 1349kB time=00:00:08.28 bitrate=1333.2kbits/
frame= 8493 fps=195 q=33.0 size= 1374kB time=00:00:08.44 bitrate=1333.7kbits/
frame= 8546 fps=194 q=33.0 size= 1388kB time=00:00:08.49 bitrate=1338.4kbits/
frame= 8703 fps=194 q=33.0 size= 1427kB time=00:00:08.65 bitrate=1350.3kbits/
frame= 8821 fps=193 q=33.0 size= 1444kB time=00:00:08.76 bitrate=1349.0kbits/
frame= 8972 fps=193 q=33.0 size= 1481kB time=00:00:08.93 bitrate=1357.3kbits/
frame= 9130 fps=193 q=33.0 size= 1496kB time=00:00:09.07 bitrate=1349.8kbits/
frame= 9268 fps=192 q=33.0 size= 1523kB time=00:00:09.21 bitrate=1353.9kbits/
frame= 9373 fps=192 q=33.0 size= 1536kB time=00:00:09.32 bitrate=1350.0kbits/
frame= 9423 fps=176 q=33.0 size= 1536kB time=00:00:09.37 bitrate=1342.8kbits/
frame= 9457 fps=175 q=33.0 size= 1553kB time=00:00:09.40 bitrate=1352.3kbits/
frame= 9583 fps=175 q=33.0 size= 1586kB time=00:00:09.54 bitrate=1361.6kbits/
frame= 9752 fps=176 q=33.0 size= 1605kB time=00:00:09.70 bitrate=1355.4kbits/
frame= 9824 fps=175 q=33.0 size= 1627kB time=00:00:09.77 bitrate=1363.7kbits/
frame= 9981 fps=175 q=33.0 size= 1663kB time=00:00:09.92 bitrate=1371.7kbits/
frame=10142 fps=175 q=33.0 size= 1691kB time=00:00:10.09 bitrate=1372.0kbits/
frame=10228 fps=175 q=33.0 size= 1712kB time=00:00:10.19 bitrate=1376.4kbits/
frame=10385 fps=176 q=33.0 size= 1726kB time=00:00:10.33 bitrate=1368.6kbits/
frame=10517 fps=176 q=33.0 size= 1752kB time=00:00:10.46 bitrate=1370.8kbits/
frame=10517 fps=155 q=33.0 size= 1761kB time=00:00:10.51 bitrate=1371.9kbits/
frame=10631 fps=154 q=33.0 size= 1771kB time=00:00:10.57 bitrate=1371.3kbits/
frame=10696 fps=154 q=33.0 size= 1787kB time=00:00:10.65 bitrate=1373.6kbits/
frame=10781 fps=153 q=33.0 size= 1808kB time=00:00:10.74 bitrate=1378.3kbits/
frame=10869 fps=153 q=33.0 size= 1811kB time=00:00:10.81 bitrate=1371.6kbits/
frame=10938 fps=153 q=33.0 size= 1840kB time=00:00:10.88 bitrate=1384.2kbits/
frame=11025 fps=152 q=33.0 size= 1855kB time=00:00:10.98 bitrate=1384.3kbits/
frame=11110 fps=152 q=33.0 size= 1875kB time=00:00:11.07 bitrate=1387.0kbits/
frame=11224 fps=152 q=33.0 size= 1901kB time=00:00:11.17 bitrate=1393.9kbits/
frame=11313 fps=153 q=33.0 size= 1914kB time=00:00:11.26 bitrate=1392.0kbits/
frame=11398 fps=153 q=33.0 size= 1941kB time=00:00:11.35 bitrate=1400.6kbits/
frame=11495 fps=153 q=33.0 size= 1958kB time=00:00:11.44 bitrate=1401.6kbits/
frame=11582 fps=153 q=33.0 size= 1975kB time=00:00:11.53 bitrate=1402.5kbits/
frame=11670 fps=153 q=33.0 size= 2003kB time=00:00:11.63 bitrate=1410.8kbits/
frame=11868 fps=153 q=33.0 size= 2039kB time=00:00:11.81 bitrate=1413.9kbits/
frame=12063 fps=154 q=33.0 size= 2070kB time=00:00:12.01 bitrate=1411.8kbits/
frame=12115 fps=154 q=33.0 size= 2082kB time=00:00:12.06 bitrate=1413.7kbits/
frame=12240 fps=154 q=33.0 size= 2118kB time=00:00:12.18 bitrate=1423.4kbits/
frame=12326 fps=154 q=33.0 size= 2133kB time=00:00:12.28 bitrate=1423.1kbits/
frame=12431 fps=154 q=33.0 size= 2165kB time=00:00:12.37 bitrate=1432.7kbits/
frame=12592 fps=154 q=33.0 size= 2195kB time=00:00:12.55 bitrate=1432.1kbits/
frame=12748 fps=155 q=33.0 size= 2221kB time=00:00:12.69 bitrate=1432.9kbits/
frame=12846 fps=155 q=30.0 size= 2238kB time=00:00:12.79 bitrate=1433.1kbits/
frame=12995 fps=155 q=33.0 size= 2255kB time=00:00:12.94 bitrate=1427.5kbits/
frame=13062 fps=155 q=33.0 size= 2280kB time=00:00:13.02 bitrate=1434.1kbits/
frame=13201 fps=155 q=33.0 size= 2309kB time=00:00:13.16 bitrate=1436.8kbits/
frame=13361 fps=156 q=33.0 size= 2323kB time=00:00:13.30 bitrate=1430.1kbits/
frame=13466 fps=156 q=33.0 size= 2348kB time=00:00:13.41 bitrate=1434.2kbits/
frame=13552 fps=156 q=33.0 size= 2361kB time=00:00:13.50 bitrate=1432.4kbits/
frame=13637 fps=156 q=33.0 size= 2375kB time=00:00:13.58 bitrate=1432.0kbits/
frame=13793 fps=157 q=33.0 size= 2401kB time=00:00:13.74 bitrate=1431.6kbits/
frame=13878 fps=157 q=33.0 size= 2417kB time=00:00:13.82 bitrate=1431.9kbits/
frame=13954 fps=157 q=33.0 size= 2448kB time=00:00:13.90 bitrate=1441.9kbits/
frame=14110 fps=157 q=33.0 size= 2464kB time=00:00:14.05 bitrate=1435.6kbits/
frame=14187 fps=157 q=33.0 size= 2494kB time=00:00:14.13 bitrate=1444.9kbits/
frame=14352 fps=158 q=33.0 size= 2506kB time=00:00:14.30 bitrate=1435.6kbits/
frame=14426 fps=157 q=33.0 size= 2540kB time=00:00:14.37 bitrate=1447.5kbits/
frame=14530 fps=158 q=33.0 size= 2550kB time=00:00:14.47 bitrate=1442.9kbits/
frame=14647 fps=158 q=33.0 size= 2580kB time=00:00:14.60 bitrate=1447.2kbits/
frame=14803 fps=158 q=33.0 size= 2595kB time=00:00:14.75 bitrate=1441.3kbits/
frame=14887 fps=158 q=33.0 size= 2608kB time=00:00:14.83 bitrate=1440.2kbits/
frame=15035 fps=158 q=33.0 size= 2637kB time=00:00:14.98 bitrate=1442.0kbits/
frame=15121 fps=158 q=33.0 size= 2656kB time=00:00:15.06 bitrate=1443.9kbits/
frame=15275 fps=159 q=33.0 size= 2680kB time=00:00:15.22 bitrate=1442.0kbits/
frame=15362 fps=159 q=33.0 size= 2694kB time=00:00:15.31 bitrate=1441.3kbits/
frame=15488 fps=159 q=33.0 size= 2722kB time=00:00:15.43 bitrate=1444.4kbits/
frame=15519 fps=159 q=-1.0 Lsize= 2926kB time=00:00:15.57 bitrate=1538.5kbits
/s dup=15201 drop=0
video:2491kB audio:245kB subtitle:0 global headers:0kB muxing overhead 6.957093%
[libx264 @ 03b0fbc0] frame I:64 Avg QP:17.98 size: 11359
[libx264 @ 03b0fbc0] frame P:3947 Avg QP:19.98 size: 350
[libx264 @ 03b0fbc0] frame B:11508 Avg QP:26.88 size: 38
[libx264 @ 03b0fbc0] consecutive B-frames: 1.1% 0.1% 0.1% 98.7%
[libx264 @ 03b0fbc0] mb I I16..4: 24.0% 74.3% 1.8%
[libx264 @ 03b0fbc0] mb P I16..4: 0.3% 2.0% 0.0% P16..4: 2.4% 0.8% 0.6%
0.0% 0.0% skip:93.9%
[libx264 @ 03b0fbc0] mb B I16..4: 0.0% 0.1% 0.0% B16..8: 2.3% 0.0% 0.0%
direct: 0.0% skip:97.6% L0:57.2% L1:42.7% BI: 0.1%
[libx264 @ 03b0fbc0] 8x8 transform intra:80.7% inter:70.2%
[libx264 @ 03b0fbc0] coded y,uvDC,uvAC intra: 57.7% 71.6% 20.3% inter: 0.3% 0.6%
0.1%
[libx264 @ 03b0fbc0] i16 v,h,dc,p: 43% 28% 23% 5%
[libx264 @ 03b0fbc0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 24% 42% 3% 1% 1% 1%
3% 3%
[libx264 @ 03b0fbc0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 46% 26% 9% 3% 3% 3% 3%
4% 3%
[libx264 @ 03b0fbc0] i8c dc,h,v,p: 38% 30% 26% 6%
[libx264 @ 03b0fbc0] Weighted P-Frames: Y:0.1% UV:0.1%
[libx264 @ 03b0fbc0] ref P L0: 81.3% 12.1% 5.1% 1.5% 0.0%
[libx264 @ 03b0fbc0] ref B L0: 54.7% 42.1% 3.2%
[libx264 @ 03b0fbc0] ref B L1: 93.7% 6.3%
[libx264 @ 03b0fbc0] kb/s:1314.44
D:\ffmpeg\bin>
Ich weiß, dass es kein Problem mit ffmpeg ist, sondern mit meiner Flash-Anwendung oder meinem Red5/AMS-Server. Aber ich denke, ich kann dieses Problem beheben, wenn ich diese 0-kB-Teile aus meinem Video entfernen kann.
Antwort1
Red5 zeichnet nur auf, was von einem Client empfangen wird; es gibt kein „Extra“, das vom Server erstellt wird und stille Audiodaten enthält. Aufgrund dessen, was ich über den Server weiß, würde ich davon ausgehen, dass Ihr Veröffentlichungsclient weitere Daten sendet, nachdem er Ihrer Meinung nach aufgehört hat.