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• converting eac3 to aac with ffmpeg

  30 novembre 2023, par vespino

  I have a number of video files stored on my Synology of which the audio doesn't play on when opening them with DS File. This is because DS File does not support eac3. I would like to convert those files to aac using ffmpeg, but when doing so, all audio is lost.

  


  This is the file info :

  


  Input #0, matroska,webm, from &#x27;<file>.mkv&#x27;:&#xA;  Metadata:&#xA;    encoder         : libebml v1.4.2 &#x2B; libmatroska v1.6.4&#xA;  Duration: 00:48:43.42, start: 0.000000, bitrate: 6566 kb/s&#xA;    Stream #0:0: Video: h264 (High), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)&#xA;    Stream #0:1(eng): Audio: eac3, 48000 Hz, 5.1 (default)&#xA;    Stream #0:2(eng): Subtitle: subrip&#xA;    Metadata:&#xA;      title           : English [SDH]&#xA;    Stream #0:3(ara): Subtitle: subrip&#xA;    Metadata:&#xA;      title           : Arabic&#xA;    Stream #0:4(chi): Subtitle: subrip&#xA;</file>

  


  This is my attempt :

  


  ffmpeg -i <file>.mkv -map 0:v -map 0:a:0 -map 0:s -c copy -c:a aac -b:a 640k output.mkv&#xA;</file>

  


  Subtitles are kept, but audio is completely removed. I would like to automate the process if possible.

  


  This is my ffmpeg configuration :

  


  ffmpeg version 4.1.8 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 8.5.0 (GCC)
  configuration: --prefix=/usr --incdir='${prefix}/include/ffmpeg' --arch=i686 --target-os=linux --cross-prefix=/usr/local/x86_64-pc-linux-gnu/bin/x86_64-pc-linux-gnu- --enable-cross-compile --enable-optimizations --enable-pic --enable-gpl --enable-shared --disable-static --disable-stripping --enable-version3 --enable-encoders --enable-pthreads --disable-protocols --disable-protocol=rtp --enable-protocol=file --enable-protocol=pipe --disable-muxer=image2 --disable-muxer=image2pipe --disable-swscale-alpha --disable-ffplay --disable-ffprobe --disable-doc --disable-devices --disable-bzlib --disable-altivec --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libmp3lame --disable-vaapi --disable-cuvid --disable-nvenc --disable-decoder=aac --disable-decoder=aac_fixed --disable-encoder=aac --disable-decoder=amrnb --disable-decoder=ac3 --disable-decoder=ac3_fixed --disable-encoder=zmbv --disable-encoder=dca --disable-decoder=dca --disable-encoder=ac3 --disable-encoder=ac3_fixed --disable-encoder=eac3 --disable-decoder=eac3 --disable-encoder=truehd --disable-decoder=truehd --disable-encoder=hevc_vaapi --disable-decoder=hevc --disable-muxer=hevc --disable-demuxer=hevc --disable-parser=hevc --disable-bsf=hevc_mp4toannexb --x86asmexe=yasm --cc=/usr/local/x86_64-pc-linux-gnu/bin/x86_64-pc-linux-gnu-wrap-gcc --enable-yasm --enable-libx264 --enable-encoder=libx264
  libavutil      56. 22.100 / 56. 22.100
  libavcodec     58. 35.100 / 58. 35.100
  libavformat    58. 20.100 / 58. 20.100
  libavdevice    58.  5.100 / 58.  5.100
  libavfilter     7. 40.101 /  7. 40.101
  libswscale      5.  3.100 /  5.  3.100
  libswresample   3.  3.100 /  3.  3.100
  libpostproc    55.  3.100 / 55.  3.100


  


  Synology does not support eac3 out of the box. So is this even possible ?

  


• FFmpeg : Choosing audio streams by language

  16 octobre 2017, par jdauthre

  I am trying to transcode tv streams but with only the english audio stream included. I have tried using the -map 0:m:language:eng stream specifier, but I get :

  "Automatic encoder selection failed for output stream #0:3. Default encoder for format mpegts (codec none) is probably disabled. Please choose an encoder manually.
  
  Error selecting an encoder for stream 0:3"

  This is despite including an encoder. I have tried all sorts of variations on this theme without success.

  Full output for one attempt is below :

  ffmpeg -i http://192.168.1.74:8001/1:0:1:189E:7FD:2:11A0000:0:0:0: -ignore_unknown -map 0:a -map 0:m:language:eng -map 0:v -acodec aac -vcodec libx264 -b:v 1100000 -t 00:00:30 "somethin.ts" 2>output.txt
  
  
  
      Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  [mpegts @ 03db7b60] Could not find codec parameters for stream 17 (Unknown: none ([11][0][0][0] / 0x000B)): unknown codec
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  [mpegts @ 03db7b60] Could not find codec parameters for stream 18 (Unknown: none ([11][0][0][0] / 0x000B)): unknown codec
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  Input #0, mpegts, from 'http://192.168.1.74:8001/1:0:1:189E:7FD:2:11A0000:0:0:0:':
  
    Duration: N/A, start: 23690.732933, bitrate: N/A
  
    Program 6321 
  
    Program 6322 
  
    Program 6338 
  
    Program 6301 
  
    Program 6302 
  
      Stream #0:0[0x13ec]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Stream #0:1[0x13ee](NAR): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 224 kb/s
  
      Stream #0:2[0x13ed](eng): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 224 kb/s
  
      Stream #0:3[0x13ef](eng,eng): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006)
  
      Stream #0:4[0x13f0](eng): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
  
      Stream #0:5[0xf04]: Unknown: none ([5][0][0][0] / 0x0005)
  
      Stream #0:6[0xf03]: Unknown: none ([5][0][0][0] / 0x0005)
  
      Stream #0:7[0xf02]: Unknown: none ([5][0][0][0] / 0x0005)
  
      Stream #0:8[0xf01]: Unknown: none ([5][0][0][0] / 0x0005)
  
      Stream #0:9[0xf00]: Unknown: none ([5][0][0][0] / 0x0005)
  
      Stream #0:10[0x92a]: Unknown: none ([5][0][0][0] / 0x0005)
  
      Stream #0:11[0x913]: Unknown: none ([5][0][0][0] / 0x0005)
  
      Stream #0:12[0x912]: Unknown: none ([5][0][0][0] / 0x0005)
  
      Stream #0:13[0x911]: Unknown: none ([5][0][0][0] / 0x0005)
  
      Stream #0:14[0x919]: Unknown: none ([5][0][0][0] / 0x0005)
  
      Stream #0:15[0xf09]: Unknown: none ([11][0][0][0] / 0x000B)
  
      Stream #0:16[0xf08]: Unknown: none ([11][0][0][0] / 0x000B)
  
      Stream #0:17[0xf07]: Unknown: none ([11][0][0][0] / 0x000B)
  
      Stream #0:18[0xf06]: Unknown: none ([11][0][0][0] / 0x000B)
  
    Program 6318 
  
    Program 6390 
  
    Program 6391 
  
    Program 6351 
  
    Program 6361 
  
    Program 6306 
  
    Program 6341 
  
  Automatic encoder selection failed for output stream #0:3. Default encoder for format mpegts (codec none) is probably disabled. Please choose an encoder manually.
  
  Error selecting an encoder for stream 0:3

  Any ideas on how to do this. I cant specify streams by number as I want to use it for lots of tv streams and the order is often different.

  Thanks

• Wrong video information after encoding [closed]

  22 mars 2024, par Constadinos Chatzis

  Using FFMPEG for encoding videos from HDR to SDR with 3DLuts, i recently came to my attention that after the encoding the video has wrong information.

  


  The code i use is :
-vf lut3d="example.cube" -c:v libx265 -crf 16 -c:a copy -preset fast

  


  Original HDR video infos :

  


  General
Unique ID                      : 235922119201670445249046242281848857470 (0xB17CF2883DCE2BDE00E192235198637E)
Complete name                  : example.mkv
Format                         : Matroska
Format version                 : Version 4
File size                      : 201 MiB
Duration                       : 20 s 96 ms
Overall bit rate mode          : Variable
Overall bit rate               : 83.8 Mb/s
Frame rate                     : 16 343.153 FPS
Movie name                     : example
Writing application            : Lavf60.16.100
Writing library                : Lavf60.16.100
ErrorDetectionType             : Per level 1

Video
ID                             : 1
ID in the original source medi : 4113 (0x1011)
Format                         : HEVC
Format/Info                    : High Efficiency Video Coding
Format profile                 : Main 10@L5.1@High
HDR format                     : Dolby Vision, Version 1.0, Profile 7.6, dvhe.07.06, BL+EL+RPU, Blu-ray compatible / SMPTE ST 2086, Version HDR10, HDR10 compatible
Codec ID                       : V_MPEGH/ISO/HEVC
Duration                       : 20 s 96 ms
Bit rate                       : 66.3 Mb/s
Width                          : 3 840 pixels
Height                         : 2 160 pixels
Display aspect ratio           : 16:9
Frame rate mode                : Constant
Frame rate                     : 16 343.153 FPS
Original frame rate            : 23.976 (24000/1001) FPS
Color space                    : YUV
Chroma subsampling             : 4:2:0 (Type 2)
Bit depth                      : 10 bits
Bits/(Pixel*Frame)             : 0.000
Stream size                    : 106 GiB
Language                       : English
Default                        : No
Forced                         : No
Color range                    : Limited
Color primaries                : BT.2020
Transfer characteristics       : PQ
Matrix coefficients            : BT.2020 non-constant
Mastering display color primar : Display P3
Mastering display luminance    : min: 0.0050 cd/m2, max: 4000 cd/m2
Maximum Content Light Level    : 602 cd/m2
Maximum Frame-Average Light Le : 184 cd/m2
Original source medium         : Blu-ray


  


  After encoding to SDR the infos are :

  


  General
Unique ID                      : 197829821108483109262455008881990159019 (0x94D4A33C264AF154BCA17241DA23CAAB)
Complete name                  : example.mkv
Format                         : Matroska
Format version                 : Version 4
File size                      : 182 MiB
Duration                       : 20 s 62 ms
Overall bit rate mode          : Variable
Overall bit rate               : 76.1 Mb/s
Frame rate                     : 16 370.850 FPS
Movie name                     : example
Writing application            : Lavf60.16.100
Writing library                : Lavf60.16.100
ErrorDetectionType             : Per level 1

Video
ID                             : 1
ID in the original source medi : 4113 (0x1011)
Format                         : HEVC
Format/Info                    : High Efficiency Video Coding
Format profile                 : Format Range@L5@Main
HDR format                     : Dolby Vision, Version 1.0, Profile 7.6, dvhe.07.06, BL+EL+RPU, Blu-ray compatible
Codec ID                       : V_MPEGH/ISO/HEVC
Duration                       : 20 s 62 ms
Bit rate                       : 66.3 Mb/s
Width                          : 3 840 pixels
Height                         : 2 160 pixels
Display aspect ratio           : 16:9
Frame rate mode                : Constant
Frame rate                     : 16 370.850 FPS
Original frame rate            : 23.976 (24000/1001) FPS
Color space                    : RGB
Bit depth                      : 10 bits
Bits/(Pixel*Frame)             : 0.000
Stream size                    : 106 GiB
Writing library                : x265 3.5+113-8787af124:[Windows][GCC 13.2.0][64 bit] 10bit
Encoding settings              : cpuid=1111039 / frame-threads=4 / numa-pools=16 / wpp / no-pmode / no-pme / no-psnr / no-ssim / log-level=2 / input-csp=3 / input-res=3840x2160 / interlace=0 / total-frames=0 / level-idc=0 / high-tier=1 / uhd-bd=0 / ref=3 / no-allow-non-conformance / no-repeat-headers / annexb / no-aud / no-eob / no-eos / no-hrd / info / hash=0 / temporal-layers=0 / open-gop / min-keyint=23 / keyint=250 / gop-lookahead=0 / bframes=4 / b-adapt=0 / b-pyramid / bframe-bias=0 / rc-lookahead=15 / lookahead-slices=8 / scenecut=40 / no-hist-scenecut / radl=0 / no-splice / no-intra-refresh / ctu=64 / min-cu-size=8 / no-rect / no-amp / max-tu-size=32 / tu-inter-depth=1 / tu-intra-depth=1 / limit-tu=0 / rdoq-level=0 / dynamic-rd=0.00 / no-ssim-rd / signhide / no-tskip / nr-intra=0 / nr-inter=0 / no-constrained-intra / strong-intra-smoothing / max-merge=2 / limit-refs=3 / no-limit-modes / me=1 / subme=2 / merange=57 / temporal-mvp / no-frame-dup / no-hme / weightp / no-weightb / no-analyze-src-pics / deblock=0:0 / sao / no-sao-non-deblock / rd=2 / selective-sao=4 / no-early-skip / rskip / fast-intra / no-tskip-fast / no-cu-lossless / no-b-intra / no-splitrd-skip / rdpenalty=0 / psy-rd=2.00 / psy-rdoq=0.00 / no-rd-refine / no-lossless / cbqpoffs=6 / crqpoffs=6 / rc=crf / crf=16.0 / qcomp=0.60 / qpstep=4 / stats-write=0 / stats-read=0 / ipratio=1.40 / pbratio=1.30 / aq-mode=2 / aq-strength=1.00 / cutree / zone-count=0 / no-strict-cbr / qg-size=32 / no-rc-grain / qpmax=69 / qpmin=0 / no-const-vbv / sar=1 / overscan=0 / videoformat=5 / range=1 / colorprim=9 / transfer=16 / colormatrix=0 / chromaloc=0 / display-window=0 / cll=0,0 / min-luma=0 / max-luma=1023 / log2-max-poc-lsb=8 / vui-timing-info / vui-hrd-info / slices=1 / no-opt-qp-pps / no-opt-ref-list-length-pps / no-multi-pass-opt-rps / scenecut-bias=0.05 / no-opt-cu-delta-qp / no-aq-motion / no-hdr10 / no-hdr10-opt / no-dhdr10-opt / no-idr-recovery-sei / analysis-reuse-level=0 / analysis-save-reuse-level=0 / analysis-load-reuse-level=0 / scale-factor=0 / refine-intra=0 / refine-inter=0 / refine-mv=1 / refine-ctu-distortion=0 / no-limit-sao / ctu-info=0 / no-lowpass-dct / refine-analysis-type=0 / copy-pic=1 / max-ausize-factor=1.0 / no-dynamic-refine / no-single-sei / no-hevc-aq / no-svt / no-field / qp-adaptation-range=1.00 / scenecut-aware-qp=0conformance-window-offsets / right=0 / bottom=0 / decoder-max-rate=0 / no-vbv-live-multi-pass / no-mcstf / no-sbrc
Language                       : English
Default                        : No
Forced                         : No
Color range                    : Full
Color primaries                : BT.2020
Transfer characteristics       : PQ
Matrix coefficients            : Identity
Original source medium         : Blu-ray


  


  Is this normal ? Shouldn't the encoding file had different info's about color primaries, transfer characteristics etc ?

  


  Encoding video files i expected more accurate file informations.