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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 parameter -sseof position is not “cutting” as expected

  9 mai 2020, par Vitalii

  I have a regular recording of the desktop screen, indefinite in time. I want to keep in memory, only the last 30 seconds. My command looks like this, where I try to cut the video of the last 30 seconds, using -sizeof -30. But the entire length of the video is saved.
  
avfoundation -i '1' it's my macbook screen

  



  ffmpeg -rtbufsize 300M -sseof -30 -f avfoundation -i '1' -c:v libx264 -preset ultrafast -tune zerolatency -crf 25 ~/Desktop/output.mkv


  



  System Macos 10.15
  
ffmpeg version 4.2.2

  



  My full log

  



  ffmpeg -rtbufsize 300M -sseof -30  -f avfoundation -i '1' -c:v libx264 -preset ultrafast -tune zerolatency -crf 25 ~/Desktop/output.mkv
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple clang version 11.0.3 (clang-1103.0.32.59)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_3 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags=-fno-stack-check --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
[AVFoundation input device @ 0x7fec8551cec0] Configuration of video device failed, falling back to default.
[avfoundation @ 0x7fec8600a200] Selected pixel format (yuv420p) is not supported by the input device.
[avfoundation @ 0x7fec8600a200] Supported pixel formats:
[avfoundation @ 0x7fec8600a200]   uyvy422
[avfoundation @ 0x7fec8600a200]   yuyv422
[avfoundation @ 0x7fec8600a200]   nv12
[avfoundation @ 0x7fec8600a200]   0rgb
[avfoundation @ 0x7fec8600a200]   bgr0
[avfoundation @ 0x7fec8600a200] Overriding selected pixel format to use uyvy422 instead.
[avfoundation @ 0x7fec8600a200] Stream #0: not enough frames to estimate rate; consider increasing probesize
Cannot use -sseof, duration of 1 not known
Input #0, avfoundation, from '1':
  Duration: N/A, start: 107388.118500, bitrate: N/A
    Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 2560x1600, 1000k tbr, 1000k tbn, 1000k tbc
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x7fec869bee00] MB rate (16000000000) > level limit (16711680)
[libx264 @ 0x7fec869bee00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7fec869bee00] profile High 4:2:2, level 6.2, 4:2:2 8-bit
[libx264 @ 0x7fec869bee00] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=4 lookahead_threads=4 sliced_threads=1 slices=4 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=25.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
Output #0, matroska, to '/Users/vitalii-artec3d/Desktop/output.mkv':
  Metadata:
    encoder         : Lavf58.29.100
    Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv422p, 2560x1600, q=-1--1, 1000k fps, 1k tbn, 1000k tbc
    Metadata:
      encoder         : Lavc58.54.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
frame=  322 fps= 30 q=19.0 Lsize=     947kB time=00:00:10.80 bitrate= 718.0kbits/s speed=0.998x    
video:943kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.382723%
[libx264 @ 0x7fec869bee00] frame I:2     Avg QP:19.00  size:465715
[libx264 @ 0x7fec869bee00] frame P:320   Avg QP:19.30  size:   105
[libx264 @ 0x7fec869bee00] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0x7fec869bee00] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.1%  0.0%  0.0%  0.0%  0.0%    skip:99.9%
[libx264 @ 0x7fec869bee00] coded y,uvDC,uvAC intra: 36.9% 24.9% 21.0% inter: 0.0% 0.1% 0.0%
[libx264 @ 0x7fec869bee00] i16 v,h,dc,p: 66% 28%  4%  2%
[libx264 @ 0x7fec869bee00] i8c dc,h,v,p: 70% 16% 12%  1%
[libx264 @ 0x7fec869bee00] kb/s:23977740.00


  


• FFmpeg : convert .mpg video to .mp4 without losing quality

  20 novembre 2024, par reterius

  How can I convert a .mpg video to .mp4 without losing quality ? My attempts below :

  


  $INCPATH = dirname(__FILE__).'/';

$id = 99999;
$ext = "MPG";

$input_dir = $INCPATH."../img/videos/".$id.".".$ext ;
$output_dir2 = $INCPATH."../img/videos/".$id.".mp4" ;

$q = '/usr/bin/ffmpeg -i '.$input_dir.' -c:v libx264 -c:a libfaac -r     30 '.$output_dir2." 2>&1" ;

$out = shell_exec($q) ;
$input_dir  = $output_dir2 ;

echo var_dump($out);


  


  Output of running that script :

  


  string(5735) "ffmpeg version N-76539-g480bad7-syslint Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-16)
  configuration: --prefix=/usr/local/cpffmpeg --enable-shared --enable-nonfree --enable-gpl --enable-pthreads --enable-libopencore-amrnb --enable-decoder=liba52 --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --extra-cflags=-I/usr/local/cpffmpeg/include/ --extra-ldflags=-L/usr/local/cpffmpeg/lib --enable-version3 --extra-version=syslint
  libavutil      55.  5.100 / 55.  5.100
  libavcodec     57. 15.100 / 57. 15.100
  libavformat    57. 14.100 / 57. 14.100
  libavdevice    57.  0.100 / 57.  0.100
  libavfilter     6. 15.100 /  6. 15.100
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
Input #0, mpeg, from '/home/imcajans/public_html/kzmk/../img/videos/99999.MPG':
  Duration: 00:00:08.16, start: 0.116600, bitrate: 2955 kb/s
    Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv), 720x576 [SAR 64:45 DAR 16:9], max. 9100 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0:1[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 256 kb/s
[libx264 @ 0x161e820] using SAR=64/45
[libx264 @ 0x161e820] using cpu capabilities: none!
[libx264 @ 0x161e820] profile High, level 3.1
[libx264 @ 0x161e820] 264 - core 148 r2638 7599210 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=18 lookahead_threads=3 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
Output #0, mp4, to '/home/imcajans/public_html/kzmk/../img/videos/99999.mp4':
  Metadata:
    encoder         : Lavf57.14.100
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 720x576 [SAR 64:45 DAR 16:9], q=-1--1, 30 fps, 15360 tbn, 30 tbc
    Metadata:
      encoder         : Lavc57.15.100 libx264
    Stream #0:1: Audio: aac (libfaac) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, s16, 128 kb/s
    Metadata:
      encoder         : Lavc57.15.100 libfaac
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg2video (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (ac3 (native) -> aac (libfaac))
Press [q] to stop, [?] for help
frame=   48 fps=0.0 q=0.0 size=       0kB time=00:00:01.19 bitrate=   0.3kbits/s dup=8 drop=0    
frame=   66 fps= 58 q=29.0 size=      20kB time=00:00:01.83 bitrate=  87.2kbits/s dup=11 drop=0    
frame=   77 fps= 43 q=29.0 size=      51kB time=00:00:02.17 bitrate= 190.3kbits/s dup=13 drop=0    
frame=   89 fps= 38 q=29.0 size=      86kB time=00:00:02.60 bitrate= 272.2kbits/s dup=15 drop=0    
frame=  101 fps= 34 q=29.0 size=     124kB time=00:00:02.98 bitrate= 340.6kbits/s dup=17 drop=0    
frame=  114 fps= 32 q=29.0 size=     166kB time=00:00:03.39 bitrate= 400.3kbits/s dup=19 drop=0    
frame=  126 fps= 31 q=29.0 size=     201kB time=00:00:03.84 bitrate= 428.3kbits/s dup=21 drop=0    
frame=  137 fps= 30 q=29.0 size=     236kB time=00:00:04.20 bitrate= 459.6kbits/s dup=23 drop=0    
frame=  151 fps= 29 q=29.0 size=     275kB time=00:00:04.65 bitrate= 484.2kbits/s dup=25 drop=0    
frame=  165 fps= 29 q=29.0 size=     316kB time=00:00:05.12 bitrate= 505.4kbits/s dup=27 drop=0    
frame=  177 fps= 28 q=29.0 size=     350kB time=00:00:05.50 bitrate= 521.3kbits/s dup=29 drop=0    
frame=  188 fps= 27 q=29.0 size=     387kB time=00:00:05.93 bitrate= 534.6kbits/s dup=31 drop=0    
frame=  198 fps= 27 q=29.0 size=     419kB time=00:00:06.25 bitrate= 548.7kbits/s dup=33 drop=0    
frame=  212 fps= 27 q=29.0 size=     461kB time=00:00:06.72 bitrate= 562.4kbits/s dup=35 drop=0    
frame=  223 fps= 26 q=29.0 size=     495kB time=00:00:07.04 bitrate= 576.6kbits/s dup=37 drop=0    
frame=  240 fps= 26 q=29.0 size=     574kB time=00:00:07.59 bitrate= 618.9kbits/s dup=40 drop=0    
frame=  245 fps= 20 q=-1.0 Lsize=     834kB time=00:00:08.17 bitrate= 835.9kbits/s dup=41 drop=0    
video:696kB audio:128kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.134396%
[libx264 @ 0x161e820] frame I:2     Avg QP:22.05  size: 10777
[libx264 @ 0x161e820] frame P:187   Avg QP:22.67  size:  3323
[libx264 @ 0x161e820] frame B:56    Avg QP:23.98  size:  1242
[libx264 @ 0x161e820] consecutive B-frames: 54.7% 44.1%  1.2%  0.0%
[libx264 @ 0x161e820] mb I  I16..4: 33.5% 63.9%  2.5%
[libx264 @ 0x161e820] mb P  I16..4:  1.9%  1.8%  0.0%  P16..4: 46.9%  4.7%  6.4%  0.0%  0.0%    skip:38.3%
[libx264 @ 0x161e820] mb B  I16..4:  0.1%  0.1%  0.0%  B16..8: 34.4%  0.5%  0.0%  direct: 3.1%  skip:61.8%  L0:41.1% L1:57.8% BI: 1.1%
[libx264 @ 0x161e820] 8x8 transform intra:51.1% inter:96.1%
[libx264 @ 0x161e820] coded y,uvDC,uvAC intra: 25.1% 86.2% 30.4% inter: 9.5% 38.5% 1.1%
[libx264 @ 0x161e820] i16 v,h,dc,p: 41%  5% 11% 43%
[libx264 @ 0x161e820] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36%  6% 48%  1%  1%  3%  1%  3%  1%
[libx264 @ 0x161e820] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 54% 10% 15%  3%  3%  8%  2%  5%  2%
[libx264 @ 0x161e820] i8c dc,h,v,p: 66% 12% 18%  3%
[libx264 @ 0x161e820] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x161e820] ref P L0: 66.7%  5.8% 17.5% 10.0%
[libx264 @ 0x161e820] ref B L0: 81.1% 18.9%  0.0%
[libx264 @ 0x161e820] ref B L1: 99.5%  0.5%
[libx264 @ 0x161e820] kb/s:697.87
"


  


  My video with the .mpg extension at its best quality : https://imcajans.com/img/videos/99999.mpg

  


  And the .mp4 video which was coverted from .mpg (bad quality) : https://imcajans.com/img/videos/99999.mp4