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• ffmpeg Conversion issue with 3:2 aspect ratio

  5 mai 2015, par nurma

  Sometimes there is an issue when i try to convert to mp4 using ffmpeg. I’m getting issue "Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height". Maybe, this is because of input video file, that has dimensions 720x480 with aspect ratio 3:2. Please help me, how to correctly convert this type of video.
  This is the command :

   ffmpeg -y -i input.mp4 -i watermark.png -filter_complex 'scale=-2:360,overlay=(main_w-overlay_w)-20:(main_h-overlay_h)-20' -codec:v libx264 -profile:v main -preset slow -b:v 300k -maxrate 300k -bufsize 600k -threads 0 -codec:a aac -strict experimental -b:a 128k -crf 20 output.mp4 1> output.log 2>&1

  Here the error log :

  ffmpeg version 2.4.3 Copyright (c) 2000-2014 the FFmpeg developers
  
        built on Nov 16 2014 22:36:57 with gcc 4.8.2 (GCC)
  
        configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/man --docdir=/usr/doc/ffmpeg-2.4.3 --enable-gpl --enable-version3 --enable-avfilter --enable-avresample --enable-libass --enable-libdc1394 --enable-libgsm --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libv4l2 --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libzvbi --enable-postproc --enable-runtime-cpudetect --enable-vaapi --enable-vdpau --enable-memalign-hack --enable-pthreads --enable-x11grab --enable-bzlib --enable-zlib --enable-shared --enable-static --disable-debug --arch=x86_64 --enable-pic --extra-cflags='-I/tmp/build/tmp-ffmpeg/ffmpegdeps/usr/include -DRUNTIME_CPUDETECT' --extra-ldflags='-L/tmp/build/tmp-ffmpeg/ffmpegdeps/usr/lib64 -ldl -lssl -lcrypto -lz -lusb' --pkg-config-flags=--static
  
        libavutil      54.  7.100 / 54.  7.100
  
        libavcodec     56.  1.100 / 56.  1.100
  
        libavformat    56.  4.101 / 56.  4.101
  
        libavdevice    56.  0.100 / 56.  0.100
  
        libavfilter     5.  1.100 /  5.  1.100
  
        libavresample   2.  1.  0 /  2.  1.  0
  
        libswscale      3.  0.100 /  3.  0.100
  
        libswresample   1.  1.100 /  1.  1.100
  
        libpostproc    53.  0.100 / 53.  0.100
  
      Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  
        Metadata:
  
          major_brand     : isom
  
          minor_version   : 512
  
          compatible_brands: isomiso2avc1mp41
  
          encoder         : Lavf56.15.102
  
        Duration: 00:00:06.76, start: 0.000000, bitrate: 1856 kb/s
  
          Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 720x480, 1804 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
  
          Metadata:
  
            handler_name    : VideoHandler
  
          Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 16000 Hz, mono, fltp, 54 kb/s (default)
  
          Metadata:
  
            handler_name    : SoundHandler
  
      Input #1, png_pipe, from 'watermark.png':
  
        Duration: N/A, bitrate: N/A
  
          Stream #1:0: Video: png, rgba, 120x35, 25 tbr, 25 tbn, 25 tbc
  
      [libx264 @ 0x2179d80] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 SlowShuffle
  
      [libx264 @ 0x2179d80] profile Main, level 3.0
  
      [libx264 @ 0x2179d80] 264 - core 142 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=5 deblock=1:0:0 analyse=0x1:0x111 me=umh subme=8 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 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=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=crf mbtree=1 crf=20.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=300 vbv_bufsize=600 crf_max=0.0 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00
  
      [aac @ 0x217ba40] Too many bits per frame requested
  
      Output #0, mp4, to 'output.mp4':
  
        Metadata:
  
          major_brand     : isom
  
          minor_version   : 512
  
          compatible_brands: isomiso2avc1mp41
  
          encoder         : Lavf56.15.102
  
          Stream #0:0: Video: h264 (libx264), yuv420p, 540x360, q=-1--1, 300 kb/s, 30 fps, 30 tbn, 30 tbc (default)
  
          Metadata:
  
            encoder         : Lavc56.1.100 libx264
  
          Stream #0:1(eng): Audio: aac, 0 channels, 128 kb/s (default)
  
          Metadata:
  
            handler_name    : SoundHandler
  
            encoder         : Lavc56.1.100 aac
  
      Stream mapping:
  
        Stream #0:0 (h264) -> scale (graph 0)
  
        Stream #1:0 (png) -> overlay:overlay (graph 0)
  
        overlay (graph 0) -> Stream #0:0 (libx264)
  
        Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
      Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height

• VLC Ubuntu : Problems converting rstp streaming into http streaming

  16 janvier 2019, par Gorka Sanz Monllor

  I am trying to convert in a Linux Ubuntu Machine a rstp stream into a http stream, so I execute the following comand :

  vlc -vvv -Idummy rtsp://**************************************transportmode=unicast --sout #transcode{vcodec=MJPG,venc=ffmpeg{strict=1}}:standard{access=http{mime=multipart/x-mixed-replace;boundary=--7b3cc56e5f51db803f790dad720ed50a},mux=mpjpeg,dst=:8080/} --run-time= 300 

  vlc ://quit

  and it doesn’t work. The output is the following :

  root@f139da580fd9:/# vlc -vvv -Idummy rtsp://*********Streaming/Channels/101?transportmode=unicast --sout #transcode{vcodec=MJPG,venc=ffmpeg{strict=1}}:standard{access=ht                  tp{mime=multipart/x-mixed-replace;boundary=--7b3cc56e5f51db803f790dad720ed50a},mux=mpjpeg,dst=:8080/} --run-time= 300 vlc://quit
  
  
  
  VLC media player 2.2.2 Weatherwax (revision 2.2.2-0-g6259d80)
  
  [0000000000a9c178] core libvlc debug: VLC media player - 2.2.2 Weatherwax
  
  [0000000000a9c178] core libvlc debug: Copyright © 1996-2016 the VideoLAN team
  
  [0000000000a9c178] core libvlc debug: revision 2.2.2-0-g6259d80
  
  [0000000000a9c178] core libvlc debug: configured with ./configure  '--build=x86_64-linux-gnu' '--prefix=/usr' '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${pr                  efix}/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--disable-silent-rules' '--libdir=${prefix}/lib/x86_64-linux-gnu' '--libexecdir=${prefix}/lib/x86_64-linux-gnu' '--disable-main                  tainer-mode' '--disable-dependency-tracking' '--config-cache' '--disable-update-check' '--enable-fast-install' '--docdir=/usr/share/doc/vlc-data' '--libdir=/usr/lib' '--with-binary-version=                  2.2.2-5ubuntu0.16.04.4' '--enable-a52' '--enable-aa' '--enable-bluray' '--enable-bonjour' '--enable-caca' '--enable-chromaprint' '--enable-dbus' '--enable-dca' '--enable-directfb' '--enable                  -dvbpsi' '--enable-dvdnav' '--enable-faad' '--enable-flac' '--enable-fluidsynth' '--enable-freerdp' '--enable-freetype' '--enable-fribidi' '--disable-gles1' '--enable-gles2' '--enable-gnutl                  s' '--enable-jack' '--enable-kate' '--enable-libass' '--enable-libmpeg2' '--enable-libxml2' '--enable-lirc' '--enable-live555' '--enable-mad' '--enable-mkv' '--enable-mod' '--enable-mpc' '-                  -enable-mtp' '--enable-mux_ogg' '--enable-ncurses' '--enable-notify' '--enable-ogg' '--enable-opus' '--enable-pulse' '--enable-qt' '--enable-realrtsp' '--enable-samplerate' '--enable-schroe                  dinger' '--enable-sdl' '--enable-sdl-image' '--enable-sftp' '--enable-shine' '--enable-shout' '--enable-skins2' '--enable-speex' '--enable-svg' '--enable-svgdec' '--enable-taglib' '--enable                  -theora' '--enable-twolame' '--enable-upnp' '--enable-vcdx' '--enable-vdpau' '--enable-vnc' '--enable-vorbis' '--enable-x264' '--enable-x265' '--enable-zvbi' '--with-kde-solid=/usr/share/kd                  e4/apps/solid/actions/' '--disable-decklink' '--disable-dxva2' '--disable-fdkaac' '--disable-gnomevfs' '--disable-goom' '--disable-libtar' '--disable-mfx' '--disable-opencv' '--disable-proj                  ectm' '--disable-sndio' '--disable-telx' '--disable-vpx' '--disable-vsxu' '--disable-wasapi' '--enable-alsa' '--enable-atmo' '--enable-dc1394' '--enable-dv1394' '--enable-linsys' '--enable-                  omxil' '--enable-udev' '--enable-v4l2' '--enable-libva' '--enable-vcd' '--enable-smbclient' '--disable-oss' '--enable-crystalhd' '--enable-mmx' '--enable-sse' '--disable-neon' '--disable-al                  tivec' 'build_alias=x86_64-linux-gnu' 'CFLAGS=-g -O2 -fstack-protector-strong -Wformat -Werror=format-security ' 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,--as-needed' 'CPPFLAGS=-W                  date-time -D_FORTIFY_SOURCE=2' 'CXXFLAGS=-g -O2 -fstack-protector-strong -Wformat -Werror=format-security ' 'OBJCFLAGS=-g -O2 -fstack-protector-strong -Wformat -Werror=format-security'
  
  [0000000000a9c178] core libvlc debug: searching plug-in modules
  
  [0000000000a9c178] core libvlc debug: loading plugins cache file /usr/lib/vlc/plugins/plugins.dat
  
  [0000000000a9c178] core libvlc debug: recursively browsing `/usr/lib/vlc/plugins'
  
  [0000000000a9c178] core libvlc debug: saving plugins cache /usr/lib/vlc/plugins/plugins.dat
  
  [0000000000a9c178] core libvlc debug: plug-ins loaded: 459 modules
  
  [0000000000a9c178] core libvlc debug: opening config file (/root/.config/vlc/vlcrc)

  I am trying to connect to it from an external browser as

  http://********:8080/

  I have checked in the Linux Server that there is not any server running. Any idea on why it does not work ?

• Missing packets when transcoding using ffmpeg

  23 février 2021, par Adam Szmyd

  I have very weird issue with trans-coding opus to any other format using ffmpeg. I example it on transcoding to flac as this is what I'm currently using.

  


  So I have this one example opus file that after processing via ffmpeg kinda gets shorten like if the ffmpeg would drop some packets/data out of it.

  


  I wouldn't mind if ffmpeg was cleaning up some redundant stuff but in practice this thing is making my output file of multiple streams out of sync so at some point audio tracks gets overlapping each other.

  


  So I have this input input.opus file that's length is 00:00:05.78 and when i pass it through ffmpeg like this :

  


  $ ffmpeg -i input.opus -c flac output.flac
ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 10 (GCC)
  configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --docdir=/usr/share/doc/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection' --extra-ldflags='-Wl,-z,relro -Wl,--as-needed -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld ' --extra-cflags=' ' --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-version3 --enable-bzlib --disable-crystalhd --enable-fontconfig --enable-frei0r --enable-gcrypt --enable-gnutls --enable-ladspa --enable-libaom --enable-libdav1d --enable-libass --enable-libbluray --enable-libcdio --enable-libdrm --enable-libjack --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-liblensfun --enable-libmp3lame --enable-libmysofa --enable-nvenc --enable-openal --enable-opencl --enable-opengl --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librav1e --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-version3 --enable-vapoursynth --enable-libvpx --enable-vulkan --enable-libglslang --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --enable-libzvbi --enable-avfilter --enable-avresample --enable-libmodplug --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-lto --enable-libmfx --enable-runtime-cpudetect
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, ogg, from 'input.opus':
  Duration: 00:00:05.78, start: -0.017500, bitrate: 48 kb/s
    Stream #0:0: Audio: opus, 48000 Hz, mono, fltp
    Metadata:
      DURATION        : 00:00:05.836000000
      encoder         : Lavc58.91.100 opus
Stream mapping:
  Stream #0:0 -> #0:0 (opus (native) -> flac (native))
Press [q] to stop, [?] for help
[flac @ 0x55f94c9c2f40] encoding as 24 bits-per-sample
Output #0, flac, to 'output.flac':
  Metadata:
    encoder         : Lavf58.45.100
    Stream #0:0: Audio: flac, 48000 Hz, mono, s32 (24 bit), 128 kb/s
    Metadata:
      DURATION        : 00:00:05.836000000
      encoder         : Lavc58.91.100 flac
size=     393kB time=00:00:05.79 bitrate= 555.7kbits/s speed= 373x    
video:0kB audio:385kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.102753%


  


  interestingly ffmpeg above shows that output should get 00:00:05.79 duration but when checking it with ffprobe, its shorter by 50ms :

  


  $ ffprobe -hide_banner output.flac
Input #0, flac, from 'output.flac':
  Metadata:
    encoder         : Lavf58.45.100
  Duration: 00:00:05.73, start: 0.000000, bitrate: 561 kb/s
    Stream #0:0: Audio: flac, 48000 Hz, mono, s32 (24 bit)


  


  It may seem silly small difference but I intentionally cut the file to be 5s long to keep troubleshooting easier. Source file is 30mins and I loose 1min out of it during that process so it is real.

  


  ffmpeg version 4.3.1

  


  How can i troubleshoot this ? When i try with -loglevel trace I noticed these few logs that looks "suspicious" :

  


  [opus @ 0x555a5abe6c40] skip 0 / discard 192 samples due to side data
[opus @ 0x555a5abe6c40] discard 192/960 samples


  


  But haven't found a way to stop it from discarding these samples (not even sure it is causing that..)

  


  I would appreciate any help or point troubleshooting direction.