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• Record sound with ffmpeg on ubuntu 12.04 [closed]

  27 juin 2012, par vzybilly

  I have been working for a few days on trying to get ffmpeg to record sound, a short list of what I've tried :

  #Crappy screen grab
  
  #ffmpeg -f x11grab -s "1366x768" -r "24" -i :0.0 -f mp4 ./out
  
  #awesome screen grab, grabbing sound but non out.
  
  #ffmpeg -f x11grab -s "1366x768" -r "24" -i :0.0 -f alsa -ac 2 -i pulse -vcodec libx264 -s "1366x768" -acodec libmp3lame -ab 128k -threads 0 -f mp4 ~/Desktop/vid
  
  #audio test, no audio in file.
  
  #ffmpeg -f alsa -ac 2 -i pulse -acodec libmp3lame -ab 128k -threads 0 -f mp3 ./test.mp3
  
  #awesome screen grab.
  
  #ffmpeg -f x11grab -s "1366x768" -r "24" -i :0.0 -threads 0 -sameq -an -f mp4 ~/Desktop/vid[/CODE]I'm running ubuntu 12.04 from beta(ish)

  it would be awesome if someone could help me get this to work all in one line or (the way i'm going) multiple instances of ffmpeg (screen grab, microphone, program)

  I have also tried the pavucontrol with doing the monitoring of when recording audio, but that does not help either.

  Thanks for all of your help, vzybilly 

  EDIT :
  This one crashed.

  $ ffmpeg -f alsa -ac 2 -i plughw:0,0 -f x11grab -r 100 -s 1366x768 -i :0.0 -acodec pcm_s16le -vcodec libx264 -preset ultrafast -threads 3 testVid.mkv
  
  ffmpeg version 0.8.3-4:0.8.3-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  
    built on Jun 12 2012 16:37:58 with gcc 4.6.3
  
  *** THIS PROGRAM IS DEPRECATED ***
  
  This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
  
  [alsa @ 0x8fce240] capture with some ALSA plugins, especially dsnoop, may hang.
  
  [alsa @ 0x8fce240] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, alsa, from 'plughw:0,0':
  
    Duration: N/A, start: 433.999945, bitrate: N/A
  
      Stream #0.0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
  
  [x11grab @ 0x8fde820] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1366 height: 768
  
  [x11grab @ 0x8fde820] shared memory extension  found
  
  [x11grab @ 0x8fde820] Estimating duration from bitrate, this may be inaccurate
  
  Input #1, x11grab, from ':0.0':
  
    Duration: N/A, start: 1340805516.368518, bitrate: N/A
  
      Stream #1.0: Video: rawvideo, bgra, 1366x768, -2147483 kb/s, 100 tbr, 1000k tbn, 100 tbc
  
  File 'testVid.mkv' already exists. Overwrite ? [y/N] y
  
  Incompatible pixel format 'bgra' for codec 'libx264', auto-selecting format 'yuv420p'
  
  [buffer @ 0x8fde700] w:1366 h:768 pixfmt:bgra
  
  [avsink @ 0x8fcdf20] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
  
  [scale @ 0x8ff3ce0] w:1366 h:768 fmt:bgra -> w:1366 h:768 fmt:yuv420p flags:0x4
  
  [libx264 @ 0x8fdd920] lookaheadless mb-tree requires intra refresh or infinite keyint
  
  [libx264 @ 0x8fdd920] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
  
  [libx264 @ 0x8fdd920] profile Constrained Baseline, level 4.2
  
  [libx264 @ 0x8fdd920] 264 - core 120 r2151 a3f4407 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.25 aq=0
  
  Output #0, matroska, to 'archinstall4.mkv':
  
    Metadata:
  
      encoder         : Lavf53.21.0
  
      Stream #0.0: Video: libx264, yuv420p, 1366x768, q=-1--1, 1k tbn, 100 tbc
  
      Stream #0.1: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
  
  Stream mapping:
  
    Stream #1.0 -> #0.0
  
    Stream #0.0 -> #0.1
  
  Press ctrl-c to stop encoding
  
  [alsa @ 0x8fce240] ALSA buffer xrun.
  
  [matroska @ 0x8fcd980] Application provided invalid, non monotonically increasing dts to muxer in stream 1: 213 >= 213
  
  av_interleaved_write_frame(): Invalid argument

  Any thoughts ?

  EDIT & ANSWER :
  Got it all working with a script :

  #!/bin/bash
  
  #vzybilly
  
  #these are temp files
  
  aud="aud.mp3"
  
  vid="vid.mp4"
  
  #grab audio & pid
  
  ffmpeg -f alsa -ac 2 -i plughw:0,0 $aud &
  
  audPID=$!
  
  #grab screen & pid
  
  ffmpeg -f x11grab -s "1366x768" -r "24" -i :0.0 -threads 0 -sameq -an -f mp4 $vid &
  
  vidPID=$!
  
  #wait, till name given (that means stop)
  
  read -p "Stop by giving an Output video name?" out
  
  #stop audio and video with pids
  
  kill -n 2 $audPID
  
  kill -n 2 $vidPID
  
  echo "$out"
  
  #combine to the target output file
  
  ffmpeg -i $aud -i $vid -acodec copy -vcodec copy "$out"
  
  #purge the temp files
  
  rm $aud
  
  rm $vid

• ffmpeg error trying to create mpeg video

  18 juin 2012, par Eamonn McEvoy

  I am having trouble creating mpeg files, I have 2 bitmaps (2592*2160 32bit). I am trying to combine them into an mpeg file but I cant get it to work, the command I have tried is :

  ffmpeg -i %d.bmp -b:v 99.99M -r 1 -s 2592x2160 vid.mpg

  the output is

  ffmpeg -i %d.bmp -b:v 99.99M -r 1 -s 2592x2160  vid.mpg
  
  ffmpeg version N-41416-g718607b Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Jun  8 2012 12:46:19 with gcc 4.6.3
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
  
  ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass
  
   --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable
  
  -libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libope
  
  njpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libth
  
  eora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-
  
  libvorbis --enable-libvpx --ena  libavutil      51. 56.100 / 51. 56.100
  
    libavcodec     54. 25.100 / 54. 25.100
  
    libavformat    54.  6.101 / 54.  6.101
  
    libavdevice    54.  0.100 / 54.  0.100
  
    libavfilter     2. 78.101 /  2. 78.101
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  [image2 @ 01e6be40] Stream #0: not enough frames to estimate rate; consider incr
  
  easing probesize
  
  Input #0, image2, from '%d.bmp':
  
    Duration: 00:00:00.08, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: bmp, pal8, 2592x2160, 25 tbr, 25 tbn, 25 tbc
  
  File 'vid.mpg' already exists. Overwrite ? [y/N] y
  
  w:2592 h:2160 pixfmt:pal8 tb:1/25 sar:0/1 sws_param:flags=2
  
  [ffmpeg_buffersink @ 02bb3ce0] No opaque field provided
  
  [scale @ 02bb3f20] w:2592 h:2160 fmt:pal8 sar:0/1 -> w:2592 h:2160 fmt:yuv420p s
  
  ar:0/1 flags:0x4
  
  [mpeg1video @ 02b864a0] bitrate tolerance too small for bitrate
  
  Output #0, mpeg, to 'vid.mpg':
  
      Stream #0:0: Video: mpeg1video, yuv420p, 2592x2160, q=2-31, 99990 kb/s, 90k
  
  tbn, 5 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (bmp -> mpeg1video)
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters
  
  such as bit_rate, rate, width or height

  If I leave out the -r parameter (ffmpeg -i %d.bmp -b:v 99.99M -s 2592x2160 vid.mpg) the output changes to :

  [mpeg @ 02f80120] buffer underflow i=0 bufi=749380 size=950639
  
  [mpeg @ 02f80120] buffer underflow i=0 bufi=751421 size=950639
  
  [mpeg @ 02f80120] packet too large, ignoring buffer limits to mux it
  
  [mpeg @ 02f80120] buffer underflow i=0 bufi=751421 size=950639
  
  [mpeg @ 02f80120] buffer underflow i=0 bufi=753462 size=950639
  
  [mpeg @ 02f80120] packet too large, ignoring buffer limits to mux it
  
  [mpeg @ 02f80120] buffer underflow i=0 bufi=753462 size=950639
  
  [mpeg @ 02f80120] buffer underflow i=0 bufi=755503 size=950639
  
  ...

  what am I doing wrong ?

• Limitations of ffmpeg ?

  7 février 2016, par Eamonn McEvoy

  I am trying to convert an avi file to mpeg, but ffmpeg is giving me these error messages, ’buffer underflow’ and ’packet too large’

  The command I am using is :

  ffmpeg -I input.avi -s 2592x2160 -b 1200 output.mpg

  1. Dimensions of video - are there any limitations ?

     I have noticed that if I take a video with smaller dimensions it seems to work ok, Is there any way to accommodate files with large dimensions like this ?

  2. Frame rate - can ffmpeg pad out videos ?

     I also have issues with certain frame rates, the error message tells me that only certain frame rates are supported by the mpeg1 format, can I get ffmpeg to pad out my avi file to account for this ?

  3. File size - are there any limitations on the max file size that can be converted ?

  Thanks,
  Eamonn

  OUTPUT

  ffmpeg -i neoAvi.avi -s 2592x2160 -b 1200k neoMpg.mpg
  
  ffmpeg version N-41416-g718607b Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Jun  8 2012 12:46:19 with gcc 4.6.3
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
  
  ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass
  
   --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable
  
  -libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libope
  
  njpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libth
  
  eora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-
  
  libvorbis --enable-libvpx --ena  libavutil      51. 56.100 / 51. 56.100
  
    libavcodec     54. 25.100 / 54. 25.100
  
    libavformat    54.  6.101 / 54.  6.101
  
    libavdevice    54.  0.100 / 54.  0.100
  
    libavfilter     2. 78.101 /  2. 78.101
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  [avi @ 01d2be20] Something went wrong during header parsing, I will ignore it an
  
  d try to continue anyway.
  
  [avi @ 01d2be20] Stream #0: not enough frames to estimate rate; consider increas
  
  ing probesize
  
  [avi @ 01d2be20] Stream #1: not enough frames to estimate rate; consider increas
  
  ing probesize
  
  [avi @ 01d2be20] Could not find codec parameters (Subtitle: none)
  
  Input #0, avi, from 'neoAvi.avi':
  
    Duration: 00:00:01.49, start: 0.000000, bitrate: 1493071 kb/s
  
      Stream #0:0: Video: rawvideo, pal8, 2592x2160, 33.33 tbr, 33.33 tbn, 33.33 t
  
  bc
  
      Stream #0:1: Subtitle: none
  
  Please use -b:a or -b:v, -b is ambiguous
  
  File 'neoMpg.mpg' already exists. Overwrite ? [y/N] y
  
  [mpeg @ 02ba71a0] packet too large, ignoring buffer limits to mux it
  
  [mpeg @ 02ba71a0] buffer underflow i=0 bufi=921414 size=946200
  
  [mpeg @ 02ba71a0] buffer underflow i=0 bufi=923455 size=946200
  
  [mpeg @ 02ba71a0] packet too large, ignoring buffer limits to mux it
  
  [mpeg @ 02ba71a0] buffer underflow i=0 bufi=923455 size=946200
  
  [mpeg @ 02ba71a0] buffer underflow i=0 bufi=925496 size=946200
  
  [mpeg @ 02ba71a0] packet too large, ignoring buffer limits to mux it
  
  [mpeg @ 02ba71a0] buffer underflow i=0 bufi=925496 size=946200
  
  [mpeg @ 02ba71a0] buffer underflow i=0 bufi=927537 size=946200
  
  ...
  
  [mpeg @ 02ba71a0] packet too large, ignoring buffer limits to mux it
  
  [mpeg @ 02ba71a0] buffer underflow i=0 bufi=921414 size=946200
  
  [mpeg @ 02ba71a0] buffer underflow i=0 bufi=923455 size=946200
  
  [mpeg @ 02ba71a0] packet too large, ignoring buffer limits to mux it
  
  [mpeg @ 02ba71a0] buffer underflow i=0 bufi=923455 size=946200
  
  [mpeg @ 02ba71a0] buffer underflow i=0 bufi=925496 size=946200
  
  [mpeg @ 02ba71a0] packet too large, ignoring buffer limits to mux it
  
  [mpeg @ 02ba71a0] buffer underflow i=0 bufi=925496 size=946200
  
  [mpeg @ 02ba71a0] buffer underflow i=0 bufi=927537 size=946200
  
  frame=    4 fps=3.2 q=5.5 size=    1380kB time=00:00:00.06 bitrate=169573.6kbits
  
  frame=   13 fps=7.3 q=29.1 size=    1604kB time=00:00:00.36 bitrate=35836.2kbits
  
  frame=   22 fps=9.5 q=31.0 size=    2100kB time=00:00:00.66 bitrate=25804.8kbits
  
  frame=   31 fps= 11 q=31.0 size=    2490kB time=00:00:00.96 bitrate=21101.5kbits
  
  frame=   40 fps= 12 q=31.0 size=    3010kB time=00:00:01.26 bitrate=19466.8kbits
  
  frame=   47 fps= 12 q=31.0 Lsize=    3128kB time=00:00:01.53 bitrate=16711.7kbit
  
  s/s dup=0 drop=3
  
  video:3116kB audio:0kB global headers:0kB muxing overhead 0.372684%