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• Can ffmpeg copy parts from an rmvb file without re-encoding ?

  24 juin 2017, par Eng. M.Hamdy

  I want to fast copy parts from an rmvb file without re-encoding. This command works fine with mp4 files but not with rmbv (I dropped start time and duration here) :

  ffmpeg -i input -c copy output

  when I use it with rmvb like this :

  ffmpeg -i 1.rmvb -c copy 1.mp4

  I get this error :

  [mp4 @ 00bb8980] Could not find tag for codec rv40 in stream #0, codec
  not curre ntly supported in container Could not write header for
  output file #0 (incorrect codec parameters ?) : Invali d argument
  Stream mapping : Stream #0:1 -> #0:0 (copy) Stream #0:0 -> #0:1
  (copy)

  I also tried this :

  ffmpeg -i 1.rmvb -c copy 2.rmvb

  and got this error :

  [NULL @ 04748980] Unable to find a suitable output format for ’2.rmvb’
  2.rmvb : Invalid argument

  I tried this command :

  ffmpeg -i 1.rmvb -c:v copy -c:a aac -strict experimental -b:a 128k 1.mp4

  and got this error :

  [mp4 @ 046e0020] Could not find tag for codec rv40 in stream #0, codec
  not curre ntly supported in container Could not write header for
  output file #0 (incorrect codec parameters ?) : Invali d argument Error
  initializing output stream 0:1 — [aac @ 046e1bc0] Qavg : nan
  Conversion failed !

  I read this topic :
  but the solution does not work for me.. After many trials, this is the command that worked (and took too long time) :

  ffmpeg -i 1.rmvb -c:v libx264 -b:a 32k output.mp4

  But I do not want to re-encode the file. Any solution ?

  Edit :
  I tried :

  ffmpeg -i 1.rmvb -c copy 1.mkv

  ffmpeg version N-86447-gfeb13ae Copyright (c) 2000-2017 the FFmpeg
  developers built with gcc 7.1.0 (GCC) configuration : —enable-gpl
  —enable-version3 —enable-cuda —enable-cuvid —e nable-d3d11va —enable-dxva2 —enable-libmfx —enable-nvenc —enable-avisynth — enable-bzlib —enable-fontconfig —enable-frei0r —enable-gnutls
  —enable-iconv
  —enable-libass —enable-libbluray —enable-libbs2b —enable-libcaca —enable-li bfreetype —enable-libgme —enable-libgsm —enable-libilbc —enable-libmodplug -
  -enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enabl e-libopenh264 —enable-libopenjpeg —enable-libopus —enable-librtmp —enable-li bsnappy —enable-libsoxr —enable-libspeex —enable-libtheora —enable-libtwolam e —enable-libvidstab —enable-libvo-amrwbenc —enable-libvorbis —enable-libvpx —enable-libwavpack —enable-libwebp —enable-libx264 —enable-libx265 —enable
  -libxavs —enable-libxvid —enable-libzimg —enable-lzma —enable-zlib libavutil 55. 63.100 / 55. 63.100 libavcodec 57. 98.100 /
  57. 98.100 libavformat 57. 73.100 / 57. 73.100 libavdevice 57. 7.100 / 57. 7.100 libavfilter 6. 92.100 / 6. 92.100 libswscale 4. 7.101 / 4. 7.101 libswresample 2. 8.100 /
  2. 8.100 libpostproc 54. 6.100 / 54. 6.100 [rm @ 033a7520] Invalid stream index 2 for index at pos 206099254 Input #0, rm, from
  ’1.rmvb’ : Metadata :
  title : ArabSeed.CoM
  author : ArabSeed.CoM
  copyright : ArabSeed.CoM
  comment :
  ASMRuleBook : #($Bandwidth >= 0),Stream0Bandwidth = 64082, Stream1Bandwi dth = 285918 ;
  Audiences : Easy RealMedia Tool’s Audience ;
  audioMode : music
  Creation Date : 4/22/2010 4:31:14
  Description : This File is Created by Easy RealMedia Tools@ !
  Email : rick@redcheek.net
  Generated By : Easy RealMedia Tools V1.8x
  HomeWeb : http://redcheek.net
  Keywords : ArabSeed.CoM
  Modification Date : 4/22/2010 4:31:14
  videoMode : normal Duration : 01:16:35.69, start : 0.000000, bitrate : 358 kb/s
  Stream #0:0 : Audio : cook (cook / 0x6B6F6F63), 44100 Hz, stereo, fltp, 64 kb/ s
  Stream #0:1 : Video : rv40 (RV40 / 0x30345652), yuv420p, 720x408, 280 kb/s, 25 fps, 25 tbr, 1k tbn, 1k tbc Output #0, matroska, to
  ’1.mkv’ : Metadata :
  title : ArabSeed.CoM
  author : ArabSeed.CoM
  copyright : ArabSeed.CoM
  comment :
  ASMRuleBook : #($Bandwidth >= 0),Stream0Bandwidth = 64082, Stream1Bandwi dth = 285918 ;
  Audiences : Easy RealMedia Tool’s Audience ;
  audioMode : music
  Creation Date : 4/22/2010 4:31:14
  Description : This File is Created by Easy RealMedia Tools@ !
  Email : rick@redcheek.net
  Generated By : Easy RealMedia Tools V1.8x
  HomeWeb : http://redcheek.net
  Keywords : ArabSeed.CoM
  Modification Date : 4/22/2010 4:31:14
  videoMode : normal
  encoder : Lavf57.73.100
  Stream #0:0 : Video : rv40 (RV40 / 0x30345652), yuv420p, 720x408, q=2-31, 280 kb/s, 25 fps, 25 tbr, 1k tbn, 1k tbc
  Stream #0:1 : Audio : cook ([255][255][255][255] / 0xFFFFFFFF), 44100 Hz, ster eo, fltp, 64 kb/s Stream mapping : Stream #0:1 -> #0:0
  (copy) Stream #0:0 -> #0:1 (copy) Press [q] to stop, [?] for help
  [matroska @ 05228980] The Matroska muxer does not yet support muxing
  cook av_interleaved_write_frame() : Not yet implemented in FFmpeg,
  patches welcome Error writing trailer of 1.mkv : Not yet implemented in
  FFmpeg, patches welcome frame= 21 fps=0.0 q=-1.0 Lsize= 0kB
  time=00:00:01.48 bitrate= 0.0kbits /s speed= 148x video:2kB
  audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing ove
  rhead : unknown Conversion failed !

  I also tried :

  ffmpeg -i 1.rmvb -c copy 1.avi
  
  
  
  ffmpeg version N-86447-gfeb13ae Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 7.1.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --e
  
  nable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --
  
  enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv
  
  --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-li
  
  bfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug -
  
  -enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enabl
  
  e-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-li
  
  bsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolam
  
  e --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
  
   --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable
  
  -libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
  
    libavutil      55. 63.100 / 55. 63.100
  
    libavcodec     57. 98.100 / 57. 98.100
  
    libavformat    57. 73.100 / 57. 73.100
  
    libavdevice    57.  7.100 / 57.  7.100
  
    libavfilter     6. 92.100 /  6. 92.100
  
    libswscale      4.  7.101 /  4.  7.101
  
    libswresample   2.  8.100 /  2.  8.100
  
    libpostproc    54.  6.100 / 54.  6.100
  
  [rm @ 00077520] Invalid stream index 2 for index at pos 206099254
  
  Input #0, rm, from '1.rmvb':
  
    Metadata:
  
      title           : ArabSeed.CoM
  
      author          : ArabSeed.CoM
  
      copyright       : ArabSeed.CoM
  
      comment         :
  
      ASMRuleBook     : #($Bandwidth >= 0),Stream0Bandwidth = 64082, Stream1Bandwi
  
  dth = 285918;
  
      Audiences       : Easy RealMedia Tool's Audience;
  
      audioMode       : music
  
      Creation Date   : 4/22/2010 4:31:14
  
      Description     : This File is Created by Easy RealMedia Tools@!
  
      Email           : rick@redcheek.net
  
      Generated By    : Easy RealMedia Tools V1.8x
  
      HomeWeb         : http://redcheek.net
  
      Keywords        : ArabSeed.CoM
  
      Modification Date: 4/22/2010 4:31:14
  
      videoMode       : normal
  
    Duration: 01:16:35.69, start: 0.000000, bitrate: 358 kb/s
  
      Stream #0:0: Audio: cook (cook / 0x6B6F6F63), 44100 Hz, stereo, fltp, 64 kb/
  
  s
  
      Stream #0:1: Video: rv40 (RV40 / 0x30345652), yuv420p, 720x408, 280 kb/s, 25
  
   fps, 25 tbr, 1k tbn, 1k tbc
  
  Could not write header for output file #0 (incorrect codec parameters ?): Operat
  
  ion not permitted
  
  Stream mapping:
  
    Stream #0:1 -> #0:0 (copy)
  
    Stream #0:0 -> #0:1 (copy)
  
      Last message repeated 1 times

• using pocketsphinx_continuous with a .wav file

  3 avril 2013, par user2242131

  I am attempting to write an application that will allow a user to speak a small set of commands from a remote system and have them executed on my server. Using pocketsphinx to parse the spoken text. When run locally with the microphone, pocketsphinx_continuous works perfectly no matter how I slur the words. But when importing the audio file and using ffmpeg to downsample the audio to a single channel, 16 bit PCM file, it will parse the first word without difficulty. Then it will skip everything else and treat it as . I am confident that the problem is in the file format and not in the pocketsphinx configuration.

  Using command line
  ffmpeg -y -i Sound\AddSheet.wav -ac 1 -f s16le -acodec pcm_s16le -ar 16k AddTmp.wav
  in a batch file.

  The bottom of the output I get is :

  INFO: fsg_search.c(1407): Start node ADD.0:5:47
  
  INFO: fsg_search.c(1407): Start node <sil>.0:2:49
  
  INFO: fsg_search.c(1446): End node <sil>.126:128:305 (-486)
  
  INFO: fsg_search.c(1662): lattice start node <s>.0 end node <sil>.126
  
  INFO: ps_lattice.c(1352): Normalizer P(O) = alpha(<sil>:126:305) = -175371
  
  INFO: ps_lattice.c(1390): Joint P(O,S) = -176076 P(S|O) = -705
  
  000000000: ADD USER
  
  </sil></sil></s></sil></sil>

  Which is not the audio in the file. The words spoken in the file are "ADD SPREADSHEET", which works perfectly from the same microphone without the intervening .wav file.

  I have tried increasing the audio volume and decreasing the background noise using sox :

  sox -v 3.0 Sound\%1 Sound\%1-loud.wav ffmpeg -i Sound\%1-loud.wav -vn -ss 00:00:00 -t 00:00:01 -y Sound\%1-noiseaud.wav 
  
  sox Sound\%1-noiseaud.wav -n noiseprof Sound\%1-noise.prof 
  
  sox Sound\%1 Sound\%1-clean.wav noisered sound\noise.prof 0.21 
  
  ffmpeg -y -i Sound\%1-clean.wav -ac 1 -f s16le -acodec pcm_s16le -ar 16k AddTmp.wav

  with no noticeable effect on the final results.

  If you look at the output you will notice that fsg_search.c has found ADD as the start node, then silence for the remainder. Please help on this.

• How we compressed videofile (all format) in android programmatically

  29 mars 2017, par prakash choudhary

  i am stuck with the funtionality for the compressed video before upload to the Amazon s3. i am looking functionality like the whatsup that compressed all the video of the gallery and camera after R&D i got FFmpeg library but that is increasing size of the app apk.Please there is any alternative t ? Any idea about this problem