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FFMPEG equalizer clipping audio despite low volume
23 juillet 2023, par TomI'm using ffmpeg to equalise audio transferred from historic gramophone records, using standard eqs of the era.


The frequency and gain values are taken from the graphic eq settings listed on the Audacity website - https://plugins.audacityteam.org/additional-resources/eq-curves/playback-equalization-for-78-rpm-shellacs-and-early-33-lps


An example of the Blumlien300 curve here - https://2850314611-files.gitbook.io/ /files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FklCVENFte0GRy5IqVz0W%2Fuploads%2FJHS6Mv121GX1h898xy4K%2FBlumlein300_3.2.2.txt?alt=media&token=8d04df05-366d-47f8-8c82-149fa5eda59a


The audio file I'm testing with has a digital peak of -35db, the highest gain value applied on this eq is 17db. When I run the ffmpeg command though, it reports the audio is clipping and the result is a horribly distorted recording.


Can anyone advise why this is happening ? I run the same file through the same eq settings in Audacity and the result is as expected.


set eq="equalizer=f=22050:g=-0.4,equalizer=f=21203.720228928225:g=-0.4,equalizer=f=20389.920705063967:g=-0.4,equalizer=f=19607.354835383569:g=-0.4,equalizer=f=18854.823871147240:g=-0.4,equalizer=f=18131.175071633737:g=-0.4,equalizer=f=17435.299938351014:g=-0.4,equalizer=f=16766.132517017904:g=-0.4,equalizer=f=16122.647764715837:g=-0.4,equalizer=f=15503.859979709296:g=-0.4,equalizer=f=14908.821291529812:g=-0.4,equalizer=f=14336.620209010769:g=-0.4,equalizer=f=13786.380224048187:g=-0.4,equalizer=f=13257.258468950000:g=-0.4,equalizer=f=12748.444425315412:g=-0.4,equalizer=f=12259.158682468413:g=-0.4,equalizer=f=11788.651743541806:g=-0.4,equalizer=f=11336.202877384472:g=-0.4,equalizer=f=10901.119014532051:g=-0.4,equalizer=f=10482.733685550458:g=-0.4,equalizer=f=10080.406000125797:g=-0.4,equalizer=f=9693.519665336817:g=-0.4,equalizer=f=9321.482041606178:g=-0.4,equalizer=f=8963.723234884175:g=-0.4,equalizer=f=8619.695223674737:g=-0.4,equalizer=f=8288.871019565895:g=-0.4,equalizer=f=7970.743859979441:g=-0.4,equalizer=f=7664.826431902562:g=-0.4,equalizer=f=7370.650125412990:g=-0.4,equalizer=f=7087.764315853595:g=-0.4,equalizer=f=6815.735673557399:g=-0.4,equalizer=f=6554.147500065165:g=-0.4,equalizer=f=6302.599089819104:g=-0.4,equalizer=f=6060.705116354743:g=-0.4,equalizer=f=5828.095042050793:g=-0.4,equalizer=f=5604.412550532827:g=-0.4,equalizer=f=5389.315000861326:g=-0.4,equalizer=f=5182.472902668021:g=-0.394052055589,equalizer=f=4983.569411436476:g=-0.386751590389,equalizer=f=4792.299843153906:g=-0.376185664074,equalizer=f=4608.371207590573:g=-0.362543760251,equalizer=f=4431.501759492006:g=-0.345993198097,equalizer=f=4261.420566996452:g=-0.330710126890,equalizer=f=4097.867096616487:g=-0.318503033191,equalizer=f=3940.590814149046:g=-0.309564283335,equalizer=f=3789.350800902538:g=-0.303741189604,equalizer=f=3643.915384653179:g=-0.300601888512,equalizer=f=3504.061784765236:g=-0.3,equalizer=f=3369.575770931567:g=-0.3,equalizer=f=3240.251335011708:g=-0.3,equalizer=f=3115.890375464830:g=-0.3,equalizer=f=2996.302393894170:g=-0.3,equalizer=f=2881.304203238093:g=-0.3,equalizer=f=2770.719647160795:g=-0.3,equalizer=f=2664.379330212802:g=-0.3,equalizer=f=2562.120358347913:g=-0.3,equalizer=f=2463.786089399117:g=-0.3,equalizer=f=2369.225893131248:g=-0.3,equalizer=f=2278.294920502843:g=-0.3,equalizer=f=2190.853881783698:g=-0.3,equalizer=f=2106.768833188346:g=-0.296437432785,equalizer=f=2025.910971698469:g=-0.290217913930,equalizer=f=1948.156437760116:g=-0.280922418484,equalizer=f=1873.386125553329:g=-0.268550946447,equalizer=f=1801.485500543704:g=-0.253103497820,equalizer=f=1732.344424036255:g=-0.235614749092,equalizer=f=1665.856984462975:g=-0.218076286078,equalizer=f=1601.921335145533:g=-0.200537822606,equalizer=f=1540.439538284674:g=-0.184632657170,equalizer=f=1481.317414937308:g=-0.168779161348,equalizer=f=1424.464400751469:g=-0.152925665153,equalizer=f=1369.793407238189:g=-0.137072168707,equalizer=f=1317.220688367753:g=-0.121218672255,equalizer=f=1266.665712285991:g=-0.105365175802,equalizer=f=1218.051037954117:g=-0.088396941462,equalizer=f=1171.302196523118:g=-0.070858476440,equalizer=f=1126.347577261013:g=-0.053320011417,equalizer=f=1083.118317858216:g=-0.034770724190,equalizer=f=1041.548198942992:g=-0.013200571808,equalizer=f=1001.573542645411:g=0.011445558081,equalizer=f=963.133115054414:g=0.039167665478,equalizer=f=926.168032418592:g=0.069965750383,equalizer=f=890.621670946974:g=0.103839812794,equalizer=f=856.439580071665:g=0.140789852714,equalizer=f=823.569399039473:g=0.180815870141,equalizer=f=791.960776704742:g=0.223158863450,equalizer=f=761.565294400547:g=0.266149082252,equalizer=f=732.336391770094:g=0.311823093692,equalizer=f=704.229295444710:g=0.360237839089,equalizer=f=677.200950459179:g=0.413174176689,equalizer=f=651.209954299352:g=0.471478099167,equalizer=f=626.216493481026:g=0.535493496953,equalizer=f=602.182282562909:g=0.606978871276,equalizer=f=579.070505500287:g=0.684199304160,equalizer=f=556.845759249530:g=0.767096732395,equalizer=f=535.473999537060:g=0.853776460170,equalizer=f=514.922488709709:g=0.943323717867,equalizer=f=495.159745586582:g=1.036571598687,equalizer=f=476.155497235608:g=1.135335711982,equalizer=f=457.880632600910:g=1.237175803242,equalizer=f=440.307157909949:g=1.342335109599,equalizer=f=423.408153792158:g=1.453088412615,equalizer=f=407.157734043353:g=1.569993670188,equalizer=f=391.531005972773:g=1.688508164136,equalizer=f=376.504032271996:g=1.808802987893,equalizer=f=362.053794347337:g=1.934465396527,equalizer=f=348.158157059540:g=2.065823830001,equalizer=f=334.795834816768:g=2.204891058267,equalizer=f=321.946358968944:g=2.352009664049,equalizer=f=309.590046453497:g=2.509552803849,equalizer=f=297.707969644483:g=2.678532979186,equalizer=f=286.281927358906:g=2.856115742576,equalizer=f=275.294416975809:g=3.041612670003,equalizer=f=264.728607625441:g=3.230723044219,equalizer=f=254.568314407418:g=3.422700948357,equalizer=f=244.797973598401:g=3.621312762050,equalizer=f=235.402618811295:g=3.826195809769,equalizer=f=226.367858069467:g=4.034154835453,equalizer=f=217.679851760848:g=4.246639157749,equalizer=f=209.325291438168:g=4.468048945659,equalizer=f=201.291379432825:g=4.698686666092,equalizer=f=193.565809251186:g=4.938552319047,equalizer=f=186.136746723276:g=5.187645904525,equalizer=f=178.992811874976:g=5.445967422525,equalizer=f=172.123061495972:g=5.712025685327,equalizer=f=165.516972376744:g=5.984236264250,equalizer=f=159.164425188922:g=6.258981796419,equalizer=f=153.055688984312:g=6.515823590632,equalizer=f=147.181406288853:g=6.777692051390,equalizer=f=141.532578768664:g=7.044587178695,equalizer=f=136.100553446236:g=7.314095599483,equalizer=f=130.877009445637:g=7.583605034445,equalizer=f=125.853945246444:g=7.853114469407,equalizer=f=121.023666426868:g=8.146285201135,equalizer=f=116.378773877299:g=8.444439101287,equalizer=f=111.912152466211:g=8.742593001439,equalizer=f=107.616960141075:g=9.042209423688,equalizer=f=103.486617447577:g=9.344900874707,equalizer=f=99.514797451091:g=9.650668303691,equalizer=f=95.695416044961:g=9.959511710641,equalizer=f=92.022622630759:g=10.271431095557,equalizer=f=88.490791156230:g=10.586541422511,equalizer=f=85.094511497198:g=10.906991735356,equalizer=f=81.828581170245:g=11.233594002758,equalizer=f=78.687997363448:g=11.556996378650,equalizer=f=75.667949272979:g=11.873211536187,equalizer=f=72.763810733831:g=12.194794278600,equalizer=f=69.971133133372:g=12.521192148224,equalizer=f=67.285638596875:g=12.846501740168,equalizer=f=64.703213434600:g=13.169127539473,equalizer=f=62.219901840358:g=13.492484068742,equalizer=f=59.831899831942:g=13.820346094285,equalizer=f=57.535549424116:g=14.145340590334,equalizer=f=55.327333025244:g=14.467659297988,equalizer=f=53.203868048980:g=14.789401139821,equalizer=f=51.161901732761:g=15.111142981226,equalizer=f=49.198306155165:g=15.437629968456,equalizer=f=47.310073444503:g=15.770860796927,equalizer=f=45.494311171305:g=16.104091624940,equalizer=f=43.748237917649:g=16.412536097232,equalizer=f=42.069179016527:g=16.579143834849,equalizer=f=40.454562454745:g=16.588876722789,equalizer=f=38.901914933067:g=16.461103901687,equalizer=f=37.408858077565:g=16.215674576171,equalizer=f=35.973104796389:g=15.850016386783,equalizer=f=34.592455776352:g=15.350234288456,equalizer=f=33.264796113983:g=14.615823142814,equalizer=f=31.988092075884:g=13.626809695512,equalizer=f=30.760387983412:g=12.332756508563,equalizer=f=29.579803216941:g=10.518513413063,equalizer=f=28.444529335092:g=8.346792732977,equalizer=f=27.352827304528:g=5.833681758551,equalizer=f=26.303024836072:g=3.097942665008,equalizer=f=25.293513823067:g=0.163604913582,equalizer=f=24.322747878043:g=-2.887748621210,equalizer=f=23.389239963935:g=-6.091081601564,equalizer=f=22.491560116216:g=-9.478973229620,equalizer=f=21.628333252442:g=-12.539218030638,equalizer=f=20.798237065887:g=-14.384804507659,equalizer=f=20:g=-15"
ffmpeg -i "File.wav" -af %eq% -c:a pcm_s24le out.wav


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Quick stream from file which exists
4 mai 2017, par parsaI implement live streaming from mp4 video file which exists on the path with ffmpeg under hls format.
When my video file have the quality greater than hd720 , in encoding there are so many delays for creating .ts fragments.
I mean the .ts fragments slowly produced on my path,and because of it I have so many delays in showing the stream.
Here is my ffmpeg code for streaming :ffmpeg -re -i 123.mp4 -s cga -f hls -hls_list_size 0 -c:v libx264 -c:a aac 200p/out.m3u8
-s nhd -f hls -hls_list_size 0 -c:v libx264 -c:a aac 360p/out.m3u8
-s hd480 -f hls -hls_list_size 0 -c:v libx264 -c:a aac 480p/out.m3u8
-s hd720 -f hls -hls_list_size 0 -c:v libx264 -c:a aac 720p/out.m3u8
-s hd1080 -f hls -hls_list_size 0 -c:v libx264 -c:a aac 1080p/out.m3u8And here is the console output :
ffmpeg -re -i ../files/412-887123464/video/412-887123464.mp4 -s cga -f hls -hls_list_size 0 -c:v libx264 -c:a aac ../fil
es/412-887123464/video/200p/out.m3u8 -s nhd -f hls -hls_list_size 0 -c:v libx264 -c:a aac ../files/412-887123464/video/360p/out.m3u8 -s hd480 -f hls -
hls_list_size 0 -c:v libx264 -c:a aac ../files/412-887123464/video/480p/out.m3u8 -s hd720 -f hls -hls_list_size 0 -c:v libx264 -c:a aac ../files/412-88
7123464/video/720p/out.m3u8 -s hd1080 -f hls -hls_list_size 0 -c:v libx264 -c:a aac ../files/412-887123464/video/1080p/out.m3u8
ffmpeg version N-82225-gb4e9252 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.4.0 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --e
nable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcac
a --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-lib
opencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr
--enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwa
vpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zl
ib
libavutil 55. 35.100 / 55. 35.100
libavcodec 57. 66.101 / 57. 66.101
libavformat 57. 57.100 / 57. 57.100
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 66.100 / 6. 66.100
libswscale 4. 3.100 / 4. 3.100
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '../files/412-887123464/video/412-887123464.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.31.100
Duration: 00:05:04.07, start: 0.000000, bitrate: 3108 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 2976 kb/s, 25 fps, 25 tbr, 90k tbn, 50
tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
Metadata:
handler_name : SoundHandler
[libx264 @ 0000000001c53f00] using SAR=10/9
[libx264 @ 0000000001c53f00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0000000001c53f00] profile High, level 1.3
Output #0, hls, to '../files/412-887123464/video/200p/out.m3u8':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.57.100
Stream #0:0(und): Video: h264 (libx264), yuv420p, 320x200 [SAR 10:9 DAR 16:9], q=-1--1, 25 fps, 90k tbn, 25 tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc57.66.101 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1(und): Audio: aac (LC), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc57.66.101 aac
[libx264 @ 0000000001f87180] using SAR=1/1
[libx264 @ 0000000001f87180] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0000000001f87180] profile High, level 3.0
Output #1, hls, to '../files/412-887123464/video/360p/out.m3u8':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.57.100
Stream #1:0(und): Video: h264 (libx264), yuv420p, 640x360 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 90k tbn, 25 tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc57.66.101 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #1:1(und): Audio: aac (LC), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc57.66.101 aac
[libx264 @ 0000000001c55ba0] using SAR=640/639
[libx264 @ 0000000001c55ba0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0000000001c55ba0] profile High, level 3.0
Output #2, hls, to '../files/412-887123464/video/480p/out.m3u8':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.57.100
Stream #2:0(und): Video: h264 (libx264), yuv420p, 852x480 [SAR 640:639 DAR 16:9], q=-1--1, 25 fps, 90k tbn, 25 tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc57.66.101 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #2:1(und): Audio: aac (LC), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc57.66.101 aac
[libx264 @ 0000000001ca0220] using SAR=1/1
[libx264 @ 0000000001ca0220] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0000000001ca0220] profile High, level 3.1
Output #3, hls, to '../files/412-887123464/video/720p/out.m3u8':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.57.100
Stream #3:0(und): Video: h264 (libx264), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 90k tbn, 25 tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc57.66.101 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #3:1(und): Audio: aac (LC), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc57.66.101 aac
[libx264 @ 0000000001ca23e0] using SAR=1/1
[libx264 @ 0000000001ca23e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0000000001ca23e0] profile High, level 4.0
Output #4, hls, to '../files/412-887123464/video/1080p/out.m3u8':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.57.100
Stream #4:0(und): Video: h264 (libx264), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 90k tbn, 25 tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc57.66.101 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #4:1(und): Audio: aac (LC), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc57.66.101 aac
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Stream #0:0 -> #1:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #1:1 (aac (native) -> aac (native))
Stream #0:0 -> #2:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #2:1 (aac (native) -> aac (native))
Stream #0:0 -> #3:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #3:1 (aac (native) -> aac (native))
Stream #0:0 -> #4:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #4:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
frame= 7600 fps= 21 q=-1.0 Lq=-1.0 q=-1.0 q=-1.0 q=-1.0 size=N/A time=00:05:04.06 bitrate=N/A speed=0.835x
video:294980kB audio:23995kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
[libx264 @ 0000000001d33f00] frame I:33 Avg QP:19.93 size: 11412
[libx264 @ 0000000001d33f00] frame P:2281 Avg QP:23.72 size: 3112
[libx264 @ 0000000001d33f00] frame B:5286 Avg QP:28.59 size: 446
[libx264 @ 0000000001d33f00] consecutive B-frames: 4.3% 6.9% 5.9% 82.8%
[libx264 @ 0000000001d33f00] mb I I16..4: 12.9% 42.9% 44.2%
[libx264 @ 0000000001d33f00] mb P I16..4: 1.3% 4.4% 2.3% P16..4: 41.4% 22.0% 15.5% 0.0% 0.0% skip:13.1%
[libx264 @ 0000000001d33f00] mb B I16..4: 0.0% 0.1% 0.0% B16..8: 35.2% 5.9% 2.1% direct: 3.0% skip:53.6% L0:35.3% L1:48.0% BI:16.8%
[libx264 @ 0000000001d33f00] 8x8 transform intra:53.4% inter:57.9%
[libx264 @ 0000000001d33f00] coded y,uvDC,uvAC intra: 70.6% 89.7% 67.6% inter: 18.1% 20.3% 7.2%
[libx264 @ 0000000001d33f00] i16 v,h,dc,p: 24% 24% 6% 45%
[libx264 @ 0000000001d33f00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 14% 19% 5% 5% 7% 5% 10% 7%
[libx264 @ 0000000001d33f00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 15% 15% 6% 6% 7% 6% 8% 6%
[libx264 @ 0000000001d33f00] i8c dc,h,v,p: 42% 17% 28% 14%
[libx264 @ 0000000001d33f00] Weighted P-Frames: Y:26.3% UV:12.9%
[libx264 @ 0000000001d33f00] ref P L0: 58.7% 24.7% 10.9% 4.8% 1.0%
[libx264 @ 0000000001d33f00] ref B L0: 92.6% 5.8% 1.6%
[libx264 @ 0000000001d33f00] ref B L1: 96.3% 3.7%
[libx264 @ 0000000001d33f00] kb/s:258.68
[aac @ 00000000005fc9e0] Qavg: 686.637
[libx264 @ 0000000002017180] frame I:31 Avg QP:19.77 size: 29228
[libx264 @ 0000000002017180] frame P:2040 Avg QP:23.08 size: 8765
[libx264 @ 0000000002017180] frame B:5529 Avg QP:27.28 size: 1471
[libx264 @ 0000000002017180] consecutive B-frames: 1.3% 4.2% 2.4% 92.1%
[libx264 @ 0000000002017180] mb I I16..4: 8.3% 58.8% 32.9%
[libx264 @ 0000000002017180] mb P I16..4: 3.2% 9.5% 2.6% P16..4: 41.5% 19.5% 11.4% 0.0% 0.0% skip:12.2%
[libx264 @ 0000000002017180] mb B I16..4: 0.2% 0.3% 0.1% B16..8: 34.5% 5.8% 1.7% direct: 2.7% skip:54.7% L0:35.9% L1:49.5% BI:14.6%
[libx264 @ 0000000002017180] 8x8 transform intra:61.2% inter:67.3%
[libx264 @ 0000000002017180] coded y,uvDC,uvAC intra: 55.8% 84.8% 51.3% inter: 15.6% 19.3% 3.9%
[libx264 @ 0000000002017180] i16 v,h,dc,p: 24% 29% 8% 39%
[libx264 @ 0000000002017180] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 17% 21% 5% 5% 7% 5% 8% 6%
[libx264 @ 0000000002017180] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 18% 15% 6% 7% 7% 6% 7% 5%
[libx264 @ 0000000002017180] i8c dc,h,v,p: 42% 18% 27% 13%
[libx264 @ 0000000002017180] Weighted P-Frames: Y:22.3% UV:12.2%
[libx264 @ 0000000002017180] ref P L0: 58.5% 23.4% 12.2% 5.2% 0.8%
[libx264 @ 0000000002017180] ref B L0: 93.1% 5.3% 1.6%
[libx264 @ 0000000002017180] ref B L1: 96.6% 3.4%
[libx264 @ 0000000002017180] kb/s:708.47
[aac @ 0000000001d35200] Qavg: 686.637
[libx264 @ 0000000001d35ba0] frame I:31 Avg QP:19.63 size: 41522
[libx264 @ 0000000001d35ba0] frame P:2025 Avg QP:22.86 size: 13415
[libx264 @ 0000000001d35ba0] frame B:5544 Avg QP:26.52 size: 2471
[libx264 @ 0000000001d35ba0] consecutive B-frames: 1.1% 3.9% 2.8% 92.2%
[libx264 @ 0000000001d35ba0] mb I I16..4: 10.6% 62.4% 26.9%
[libx264 @ 0000000001d35ba0] mb P I16..4: 4.7% 12.4% 2.6% P16..4: 41.1% 17.8% 9.4% 0.0% 0.0% skip:11.9%
[libx264 @ 0000000001d35ba0] mb B I16..4: 0.3% 0.5% 0.1% B16..8: 34.0% 5.5% 1.4% direct: 2.9% skip:55.3% L0:36.7% L1:50.2% BI:13.1%
[libx264 @ 0000000001d35ba0] 8x8 transform intra:61.7% inter:71.6%
[libx264 @ 0000000001d35ba0] coded y,uvDC,uvAC intra: 48.0% 81.9% 43.3% inter: 14.7% 19.7% 2.6%
[libx264 @ 0000000001d35ba0] i16 v,h,dc,p: 27% 29% 9% 35%
[libx264 @ 0000000001d35ba0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 19% 22% 5% 5% 6% 5% 7% 5%
[libx264 @ 0000000001d35ba0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 25% 16% 5% 6% 7% 6% 6% 4%
[libx264 @ 0000000001d35ba0] i8c dc,h,v,p: 42% 20% 26% 12%
[libx264 @ 0000000001d35ba0] Weighted P-Frames: Y:18.1% UV:10.8%
[libx264 @ 0000000001d35ba0] ref P L0: 59.5% 22.6% 12.6% 4.8% 0.5%
[libx264 @ 0000000001d35ba0] ref B L0: 93.6% 5.0% 1.4%
[libx264 @ 0000000001d35ba0] ref B L1: 97.1% 2.9%
[libx264 @ 0000000001d35ba0] kb/s:1109.23
[aac @ 0000000001d828a0] Qavg: 686.637
[libx264 @ 0000000001d7f880] frame I:32 Avg QP:19.45 size: 64737
[libx264 @ 0000000001d7f880] frame P:2104 Avg QP:22.44 size: 23985
[libx264 @ 0000000001d7f880] frame B:5464 Avg QP:25.65 size: 4999
[libx264 @ 0000000001d7f880] consecutive B-frames: 1.2% 7.7% 3.2% 87.8%
[libx264 @ 0000000001d7f880] mb I I16..4: 12.5% 70.0% 17.5%
[libx264 @ 0000000001d7f880] mb P I16..4: 6.7% 17.1% 1.8% P16..4: 40.7% 14.9% 6.6% 0.0% 0.0% skip:12.2%
[libx264 @ 0000000001d7f880] mb B I16..4: 0.6% 0.9% 0.1% B16..8: 32.5% 4.7% 1.0% direct: 2.9% skip:57.4% L0:37.6% L1:51.6% BI:10.8%
[libx264 @ 0000000001d7f880] 8x8 transform intra:65.7% inter:77.5%
[libx264 @ 0000000001d7f880] coded y,uvDC,uvAC intra: 39.5% 76.4% 32.4% inter: 13.2% 19.8% 1.5%
[libx264 @ 0000000001d7f880] i16 v,h,dc,p: 32% 27% 10% 31%
[libx264 @ 0000000001d7f880] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 30% 18% 23% 4% 5% 5% 4% 5% 4%
[libx264 @ 0000000001d7f880] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 20% 15% 5% 7% 7% 6% 6% 4%
[libx264 @ 0000000001d7f880] i8c dc,h,v,p: 42% 19% 27% 12%
[libx264 @ 0000000001d7f880] Weighted P-Frames: Y:10.5% UV:6.7%
[libx264 @ 0000000001d7f880] ref P L0: 62.3% 20.4% 12.7% 4.3% 0.3%
[libx264 @ 0000000001d7f880] ref B L0: 93.4% 5.2% 1.4%
[libx264 @ 0000000001d7f880] ref B L1: 97.7% 2.3%
[libx264 @ 0000000001d7f880] kb/s:2101.26
[aac @ 0000000001d81560] Qavg: 686.637
[libx264 @ 0000000001d7fd60] frame I:33 Avg QP:18.36 size: 98904
[libx264 @ 0000000001d7fd60] frame P:3180 Avg QP:21.67 size: 33377
[libx264 @ 0000000001d7fd60] frame B:4387 Avg QP:24.61 size: 7729
[libx264 @ 0000000001d7fd60] consecutive B-frames: 2.7% 55.9% 15.6% 25.9%
[libx264 @ 0000000001d7fd60] mb I I16..4: 22.4% 66.9% 10.7%
[libx264 @ 0000000001d7fd60] mb P I16..4: 9.9% 17.8% 0.7% P16..4: 40.4% 9.2% 3.0% 0.0% 0.0% skip:19.0%
[libx264 @ 0000000001d7fd60] mb B I16..4: 0.8% 1.3% 0.1% B16..8: 30.2% 2.6% 0.4% direct: 1.7% skip:63.0% L0:38.1% L1:54.9% BI: 7.0%
[libx264 @ 0000000001d7fd60] 8x8 transform intra:62.5% inter:82.9%
[libx264 @ 0000000001d7fd60] coded y,uvDC,uvAC intra: 25.4% 59.5% 11.6% inter: 9.6% 16.3% 0.7%
[libx264 @ 0000000001d7fd60] i16 v,h,dc,p: 33% 28% 15% 24%
[libx264 @ 0000000001d7fd60] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 34% 20% 29% 3% 3% 4% 3% 3% 3%
[libx264 @ 0000000001d7fd60] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 30% 25% 16% 4% 6% 6% 5% 5% 4%
[libx264 @ 0000000001d7fd60] i8c dc,h,v,p: 39% 21% 28% 12%
[libx264 @ 0000000001d7fd60] Weighted P-Frames: Y:5.7% UV:3.6%
[libx264 @ 0000000001d7fd60] ref P L0: 70.0% 18.6% 8.3% 3.1% 0.1%
[libx264 @ 0000000001d7fd60] ref B L0: 91.4% 7.6% 1.0%
[libx264 @ 0000000001d7fd60] ref B L1: 99.0% 1.0%
[libx264 @ 0000000001d7fd60] kb/s:3771.31
[aac @ 0000000001d823e0] Qavg: 686.637But I don’t have any problem for streaming files with creating resolutions from a file which have lower orginal quality than hd1080
What I can to do ? -
FFmpeg error : ratecontrol_init : can't open stats file
18 décembre 2015, par oldo.nichoI’ve setup an AWS EC2 instance running Ubuntu 14.04 and have installed FFmpeg so that I can compress and transcode video.
I’m trying to do a two pass conversion with the following code :
ffmpeg -i input-file.avi -codec:v libx264 -profile:v high -preset slow -b:v 500k -maxrate 500k -bufsize 1000k -vf scale=702:-1 -threads 0 -pass 1 -an -f mp4 ~/encoded/nulland second pass :
ffmpeg -i input-file.avi -codec:v libx264 -profile:v high -preset slow -b:v 500k -maxrate 500k -bufsize 1000k -vf scale=702:-1 -threads 0 -pass 2 -codec:a libfdk_aac -b:a 128k -f mp4 output-file.mp4However I get the following error :
ffmpeg version N-77283-g91c2a33 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
configuration: --prefix=/home/ubuntu/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/ubuntu/ffmpeg_build/include --extra-ldflags=-L/home/ubuntu/ffmpeg_build/lib --bindir=/home/ubuntu/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree
libavutil 55. 11.100 / 55. 11.100
libavcodec 57. 17.100 / 57. 17.100
libavformat 57. 20.100 / 57. 20.100
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 21.100 / 6. 21.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, avi, from 'input-file.avi':
Duration: 01:18:05.29, start: 0.000000, bitrate: 2025 kb/s
Stream #0:0: Video: mpeg4 (Simple Profile) (XVID / 0x44495658), yuv420p, 720x480 [SAR 1:1 DAR 3:2], 1789 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97 tbc
Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, fltp, 224 kb/s
[libx264 @ 0x1e04240] using SAR=1/1
[libx264 @ 0x1e04240] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
[libx264 @ 0x1e04240] ratecontrol_init: can't open stats file
Output #0, mp4, to '/home/ubuntu/encoded/null':
Stream #0:0: Video: h264, none, q=2-31, 128 kb/s, SAR 1:1 DAR 0:0, 29.97 fps
Metadata:
encoder : Lavc57.17.100 libx264
Stream mapping:
Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or heightThe command as written above works fine on my local computer (running OSX). Would anyone have any suggestions as to how to fix this problem ?
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