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• AWS Lambda - ffmpeg erroneously outputs distorted/clipped mp3

  23 mars 2018, par Eric Amshukov

  How do I get an mp3 output without any distortion using ffmpeg ?

  I am utilizing ffmpeg on AWS Lambda linux using the static build provided by https://www.johnvansickle.com/ffmpeg/ (x86_64 build).

  After running the following command, the mp3 output has terrible clipping/distortion.

  ffmpeg -loglevel verbose -ss 0 -t 30 -y -i /tmp/ick_20180323005225.wav -codec:a libmp3lame -qscale:a 7 /tmp/ick_20180323005225-opa.mp3

  Edit : here is the sample file that I used :

  http://www.brainybetty.com/FacebookFans/Feb112010/strings.wav

  Here is the log coming from Lambda :

  Executing command '/tmp/ffmpeg -loglevel verbose -ss 0 -t 30 -y -i /tmp/ick_20180323005225.wav -codec:a libmp3lame -qscale:a 7 /tmp/ick_20180323005225-opa.mp3' ...
  
  STDERR:
  
  ffmpeg version 3.4.2-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2018 the FFmpeg developers
  
  built with gcc 6.3.0 (Debian 6.3.0-18) 20170516
  
  configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libfribidi --enable-libass --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enab
  
  libavutil 55. 78.100 / 55. 78.100
  
  libavcodec 57.107.100 / 57.107.100
  
  libavformat 57. 83.100 / 57. 83.100
  
  libavdevice 57. 10.100 / 57. 10.100
  
  libavfilter 6.107.100 / 6.107.100
  
  libswscale 4. 8.100 / 4. 8.100
  
  libswresample 2. 9.100 / 2. 9.100
  
  libpostproc 54. 7.100 / 54. 7.100
  
  [wav @ 0x4bbdf40] parser not found for codec pcm_s16le, packets or times may be invalid.
  
  Guessed Channel Layout for Input Stream #0.0 : stereo
  
  Input #0, wav, from '/tmp/ick_20180323005225.wav':
  
  Duration: 00:00:05.00, bitrate: 1411 kb/s
  
  Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s
  
  Stream mapping:
  
  Stream #0:0 -> #0:0 (pcm_s16le (native) -> mp3 (libmp3lame))
  
  Press [q] to stop, [?] for help
  
  [graph_0_in_0_0 @ 0x4bc64e0] tb:1/44100 samplefmt:s16 samplerate:44100 chlayout:0x3
  
  [format_out_0_0 @ 0x4bc6360] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_0'
  
  [auto_resampler_0 @ 0x4bd2ee0] ch:2 chl:stereo fmt:s16 r:44100Hz -> ch:2 chl:stereo fmt:s16p r:44100Hz
  
  Output #0, mp3, to '/tmp/ick_20180323005225-opa.mp3':
  
  Metadata:
  
  TSSE : Lavf57.83.100
  
  Stream #0:0: Audio: mp3 (libmp3lame), 44100 Hz, stereo, s16p, delay 1105
  
  Metadata:
  
  encoder : Lavc57.107.100 libmp3lame
  
  size= 11kB time=00:00:00.73 bitrate= 119.5kbits/s speed=1.41x
  
  size= 23kB time=00:00:01.67 bitrate= 114.5kbits/s speed=1.61x
  
  size= 36kB time=00:00:02.61 bitrate= 113.4kbits/s speed=1.65x
  
  size= 48kB time=00:00:03.55 bitrate= 111.0kbits/s speed=1.69x
  
  size= 60kB time=00:00:04.46 bitrate= 109.6kbits/s speed=1.71x
  
  No more output streams to write to, finishing.
  
  size= 67kB time=00:00:05.01 bitrate= 108.9kbits/s speed=1.75x
  
  video:0kB audio:66kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.371917%
  
  Input file #0 (/tmp/ick_20180323005225.wav):
  
  Input stream #0:0 (audio): 216 packets read (881988 bytes); 216 frames decoded (220497 samples);
  
  Total: 216 packets (881988 bytes) demuxed
  
  Output file #0 (/tmp/ick_20180323005225-opa.mp3):
  
  Output stream #0:0 (audio): 192 frames encoded (220497 samples); 193 packets muxed (68026 bytes);
  
  Total: 193 packets (68026 bytes) muxed
  
  Executed command '/tmp/ffmpeg -loglevel verbose -ss 0 -t 30 -y -i /tmp/ick_20180323005225.wav -codec:a libmp3lame -qscale:a 7 /tmp/ick_20180323005225-opa.mp3' with code: 0.

• ffmpeg Unrecognized option 'var_stream_map'

  3 août 2022, par 陈永林

  I try :

  



  ffmpeg -re -i ./2898654.mp4 -b:a:0 32k -b:a:1 64k -b:v:0 1000k -b:v:1 3000k  \
  -map 0:a -map 0:a -map 0:v -map 0:v -f hls \
  -var_stream_map "a:0,agroup:aud_low a:1,agroup:aud_high v:0,agroup:aud_low v:1,agroup:aud_high" \
  -master_pl_name master.m3u8 \
  ./out_%v.m3u8


  



  error info :

  



  ffmpeg version 3.4.2-1~16.04.york0.2 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
  configuration: --prefix=/usr --extra-version='1~16.04.york0.2' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
Unrecognized option 'var_stream_map'.
Error splitting the argument list: Option not found


  


• Converting mp4 file downloaded via youtube-dl from periscope by using ffmpeg gives error

  20 mars 2018, par MonsterMMORPG

  This is command i have used to download from periscope by using latest youtube-dl

  youtube-dl -v periscopeurl

  Then i am running this command to convert it to a proper MP4

  ffmpeg -i gg.mp4 -c:v libx264 -preset veryslow -crf 18 -c:a aac -b:a 192k -pix_fmt yuv420p gg2.mp4

  I am using latest youtube-dl and ffmpeg

  The error i am getting is shown below

  So how can i fix this error ? The file can not be played properly on k lite mega codec player but it can be played on vlc player however can not go to any specific time etc. so it really needs to be properly re-encoded

  C:\temp>ffmpeg -i gg.mp4 -c:v libx264 -preset veryslow -crf 18 -c:a aac -b:a 192k -pix_fmt yuv420p gg2.mp4
  
  ffmpeg version N-90378-ge4eaaf7bf6 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 7.3.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3l
  
  ame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-li
  
  bvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-l
  
  ibvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enabl
  
  e-avisynth
  
    libavutil      56. 11.100 / 56. 11.100
  
    libavcodec     58. 14.100 / 58. 14.100
  
    libavformat    58. 10.100 / 58. 10.100
  
    libavdevice    58.  2.100 / 58.  2.100
  
    libavfilter     7. 13.100 /  7. 13.100
  
    libswscale      5.  0.102 /  5.  0.102
  
    libswresample   3.  0.101 /  3.  0.101
  
    libpostproc    55.  0.100 / 55.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'gg.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.10.100
  
    Duration: 00:56:45.15, start: 0.000000, bitrate: 174 kb/s
  
      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 320x568, 130 kb/s, 23.97 fps, 24 tbr, 90k tbn, 180k tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 35 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 00000009eda7ce00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 00000009eda7ce00] profile High, level 3.1
  
  [libx264 @ 00000009eda7ce00] 264 - core 155 r2901 7d0ff22 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=16 deblock=1:0:0 analyse=0x3:0x133 me
  
  =umh subme=10 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=24 chroma_me=1 trellis=2 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 d
  
  ecimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=8 b_pyramid=2 b_adapt=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=24 scenecut=40 intra_refresh=0 rc_look
  
  ahead=60 rc=crf mbtree=1 crf=18.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Too many packets buffered for output stream 0:0.577014:32:22.77 bitrate=  -0.0kbits/s speed=N/A
  
  [libx264 @ 00000009eda7ce00] frame I:1     Avg QP:19.87  size: 30456
  
  [libx264 @ 00000009eda7ce00] frame P:36    Avg QP:19.68  size:  8765
  
  [libx264 @ 00000009eda7ce00] frame B:92    Avg QP:25.27  size:  1149
  
  [libx264 @ 00000009eda7ce00] consecutive B-frames:  0.8% 10.7%  0.0% 88.5%  0.0%  0.0%  0.0%  0.0%  0.0%
  
  [libx264 @ 00000009eda7ce00] mb I  I16..4:  8.3% 10.7% 81.0%
  
  [libx264 @ 00000009eda7ce00] mb P  I16..4:  0.9%  1.5%  1.0%  P16..4: 38.8% 16.4% 11.7%  3.1%  1.3%    skip:25.3%
  
  [libx264 @ 00000009eda7ce00] mb B  I16..4:  0.1%  0.1%  0.1%  B16..8: 21.5%  4.6%  2.1%  direct: 2.7%  skip:68.9%  L0:41.2% L1:45.6% BI:13.2%
  
  [libx264 @ 00000009eda7ce00] 8x8 transform intra:28.6% inter:10.9%
  
  [libx264 @ 00000009eda7ce00] direct mvs  spatial:93.5% temporal:6.5%
  
  [libx264 @ 00000009eda7ce00] coded y,uvDC,uvAC intra: 74.0% 65.1% 38.7% inter: 15.2% 8.0% 2.9%
  
  [libx264 @ 00000009eda7ce00] i16 v,h,dc,p: 49% 20% 23%  7%
  
  [libx264 @ 00000009eda7ce00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 12% 33%  3%  5%  5%  5%  5%  7%
  
  [libx264 @ 00000009eda7ce00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 14% 10%  7%  9%  9% 11%  8% 11%
  
  [libx264 @ 00000009eda7ce00] i8c dc,h,v,p: 37% 24% 29% 10%
  
  [libx264 @ 00000009eda7ce00] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 00000009eda7ce00] ref P L0: 73.3%  6.3% 11.1%  1.8%  1.7%  1.2%  1.0%  0.5%  0.5%  0.4%  0.4%  0.4%  0.4%  0.4%  0.4%  0.3%
  
  [libx264 @ 00000009eda7ce00] ref B L0: 94.0%  3.8%  0.9%  0.3%  0.2%  0.2%  0.2%  0.1%  0.1%  0.1%  0.0%  0.0%  0.0%  0.0%  0.0%
  
  [libx264 @ 00000009eda7ce00] ref B L1: 97.7%  2.3%
  
  [libx264 @ 00000009eda7ce00] kb/s:672.35
  
  Conversion failed!
  
  
  
  C:\temp>