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Sur d’autres sites (13576)

  • FFmpeg : Error occurred while encoding audio stream from ac3 to aac

    4 décembre 2015, par akki_2891

    I am using following command to encode my video to h264 and aac audio codec :

    ffmpeg -i sample.mp4 -codec:v libx264 -profile:v high -level:v 4.0 -codec:a libvo_aacenc -b:a 128k output_file.mp4

    Following is a trace of the error i am getting at the console.

    Input #0, mpegts, from 'sample.mp4':
    
  Duration: 00:00:58.08, start: 1.000033, bitrate: 17290 kb/s
    
  Program 1
    
    Stream #0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p, 1920x1
    
080 [SAR 1:1 DAR 16:9], 29.97 fps, 59.94 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fl
    
tp, 448 kb/s
    
    Stream #0:2[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
    
[libx264 @ 003dc660] using SAR=1/1
    
[libx264 @ 003dc660] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
    
[libx264 @ 003dc660] profile High, level 4.0
    
[libx264 @ 003dc660] 264 - core 130 r2274 c832fe9 - H.264/MPEG-4 AVC codec - Cop
    
yright 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 de
    
block=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1
    
me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chr
    
oma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1
    
 interlaced=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 scen
    
ecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmi
    
n=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
[libvo_aacenc @ 03c3c640] Unable to set encoding parameters
    
Output #0, mp4, to 'output_file.mp4':
    
    Stream #0:0: Video: h264, yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 90
    
k tbn, 29.97 tbc
    
    Stream #0:1: Audio: aac, 48000 Hz, 5.1(side), s16, 128 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 -> libx264)
    
  Stream #0:1 -> #0:1 (ac3 -> libvo_aacenc)
    
Error while opening encoder for output stream #0:1 - maybe incorrect parameters
    
such as bit_rate, rate, width or height

    I am really not able to find what possibly could be wrong. I dont want to copy audio codec , i wish to encode it from ac3 to aac

    Also any suggestion to make it lossless

  • ffplay crashed on HLS streaming with toggled -an and -vn options

    19 septembre 2016, par oleg_otvorot

    When I try to start silent(without audio and video streams) playing of HLS (HTTP Live Streaming) by typing

    ffplay -an -vn -i "http://localhost:8080/video/find?startTime=
    
1376716800000&endTime=1376717400000

    I get the next error message on my console :

    ffplay version N-67063-g282c935 Copyright (coffee) 2003-2014 the FFmpeg developers
    
  built on Oct 20 2014 22:10:09 with gcc 4.9.1 (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-libbs2b --enable-libcaca --
    
enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-lib
    
modplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrw
    
b --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinge
    
r --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --en
    
able-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis
    
 --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-
    
libx265 --enable-libxavs --enable-libxvid --enable-zlib
    
  libavutil      54. 10.100 / 54. 10.100
    
  libavcodec     56.  8.102 / 56.  8.102
    
  libavformat    56.  9.101 / 56.  9.101
    
  libavdevice    56.  1.100 / 56.  1.100
    
  libavfilter     5.  2.100 /  5.  2.100
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  1.100 /  1.  1.100
    
  libpostproc    53.  3.100 / 53.  3.100
    
Input #0, hls,applehttp, from 'http://localhost:8080/video/find?startTime=137671
    
6800000&endTime=1376717400000':
    
  Duration: 00:01:50.12, start: 1.418722, bitrate: 0 kb/s
    
  Program 0
    
    Metadata:
    
      variant_bitrate : 0
    
    Stream #0:0: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 320x240 [
    
SAR 19:32 DAR 19:24], 25 fps, 25 tbr, 90k tbn, 50 tbc
    
    Stream #0:1: Audio: aac ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 14
    
7 kb/s
    
Failed to open file 'http://localhost:8080/video/find?startTime=1376716800000&en
    
dTime=1376717400000' or configure filtergraph

    Is this bug or feature that ffplay can’t playing video without audio/video stream ? I need to run ffplay programmatically from my java test application to view loadout of my service.

    P.S : I also tried adding the options "-nodisp -an", but that provided the same result as mentioned above.

  • Could not find tag for codec h264 in stream #0 codec (ffmpeg flac to alac convert)

    2 avril 2019, par Superkoira

    I’m rying to convert flac audio file into alac audio file. I’m using ffmpeg command in mac os terminal after installing ffmpeg using command brew install ffmpeg.

    After running following command

    for name in *.flac; do ffmpeg -nostdin -i "$name" -acodec alac "${name%.*}.m4a"; done

    I am getting the following error :

    Stream mapping:
    
  Stream #0:1 -> #0:0 (mjpeg (native) -> h264 (libx264))
    
  Stream #0:0 -> #0:1 (flac (native) -> alac (native))
    
[ipod @ 0x7fa5c6800000] Frame rate very high for a muxer not efficiently supporting it.
    
Please consider specifying a lower framerate, a different muxer or -vsync 2
    
[libx264 @ 0x7fa5c5804a00] using SAR=1/1
    
[libx264 @ 0x7fa5c5804a00] MB rate (77760000) > level limit (16711680)
    
[libx264 @ 0x7fa5c5804a00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    
[libx264 @ 0x7fa5c5804a00] profile High, level 6.2
    
[libx264 @ 0x7fa5c5804a00] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=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 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=1.40 aq=1:1.00
    
[ipod @ 0x7fa5c6800000] Could not find tag for codec h264 in stream #0, codec not currently supported in container
    
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
    
Error initializing output stream 0:1 -- 
    
Conversion failed!

    Is the problem located in stream #0:1 ?

    Should I be using

    -c:a alac

    instead of

    -acodec alac

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