Recherche avancée

Sur d’autres sites (11948)

• How to add album art with ffmpeg ?

  17 juillet 2016, par Adi Ricky k

  Everybody, I’ve stuck to add album art on mp3 files.

  I already research and Googling about this issue but not solution yet, on ffmpeg documentation to add image (album art) to mp3 use this script :

  ffmpeg -i input.mp3 -i cover.png -c copy -map 0 -map 1 -metadata:s:v title="Album cover" -metadata:s:v comment="Cover (Front)" out.mp3

  Source from : http://www.ffmpeg.org/ffmpeg-all.html#mp3

  But it’s doesn’t work on my console output is :

  Unrecognized option 'c'
  
  Failed to set value 'copy' for option 'c'

  I looking for another solution and I get from : http://trac.ffmpeg.org/ticket/2221 :

  ffmpeg -i input.mp3 -i cover.png -map 0:0 -map 1:0 -c copy -id3v2_version 3 -metadata:s:v title="Album cover" -metadata:s:v comment="Cover (Front)" out.mp3

  Also return same output, I already research why return :

  Unrecognized option 'c'
  
  Failed to set value 'copy' for option 'c'

  But there are no body have same problem.
  anybody can help me, please ?

  nb : I use ubuntu 12.04 and ffmpeg version 0.8.6-4:0.8.6-0.
  thanks

• python simple web app stack [on hold]

  8 septembre 2013, par Shonu93

  I am currently learning python and have written an app that I would like to put out on the web and/or Facebook platform. My script for the app is around 50-100 lines. The things I would like to implement are :

  1.HTML5 and CSS3

  • I'm good with this and would like to make the front end really appealing.

  2.Database

  • A simple database that keeps some basic info of the users who have used this app. (Either
    through their Facebook account or something else ! )
  • I would also like to have the option of storing 30 second mp3 clips. Say around 50 of
    these clips which the user can select and download.

  3.Python Backend

  • My python script should process user input on the server and send the output to the user.
  • My server should also have ffmpeg and lame libraries installed. (As my app requires this !)

  NOTE ** I would like to develop the complete web app locally first, before deploying it on the web **

  I really have no idea how to go about this. My app works like a charm on my Mac OSX and I really want to deploy this app on the web to make others happy too ! Do help me out guys !

• How to concatenate two AAC files smoothly ?

  15 août 2013, par James Deng

  To save time, I want to segment and transcode a large video file on multiple computers.

  I use ffmpeg to transcode the segments of the large video file with :

  ffmpeg -i large_movie.mp4 -ss 00:00:00 -t 00:01:00 -acodec libfaac seg0.flv
  
  ffmpeg -i large_movie.mp4 -ss 00:01:00 -t 00:01:00 -acodec libfaac seg1.flv
  
  ...

  And concatenate the segments with :

   ffmpeg -i concat.conf -vcodec copy -acodec copy result.flv

  The content of the concat.conf :

  ffsconcat version 1.0
  
  file seg0.flv
  
  file seg1.flv
  
  ...

  Now we get a result FLV file result.flv content all the segments. But when I play this file, I found the segment boundary audio may be momentarily interrupted ! I'm sure those segments is closely associated, and the timestamp is right.

  When I decode the AAC sample in segment file to a wave format, and open the wave with CoolEdit, I found at the front and the end of the file, the value of audio sample is very small (mute ?) ! At the front of the file, there is about 21ms 'mute' sample. And at the end of the file, there is about 3ms 'mute' sample.

  Is the mute samples result the momentarily interrupt ? How to concatenate media file containing AAC smoothly ?

  ---

  After further testing, I found if you split a wave file to small wave files, then encode this small wave files to small aac file use faac :

  faac -P -R 48000 -B 16 -C 2 -X -o 1.aac 1.wav
  
  faac -P -R 48000 -B 16 -C 2 -X -o 2.aac 2.wav
  
  faac -P -R 48000 -B 16 -C 2 -X -o 3.aac 3.wav
  
  faac -P -R 48000 -B 16 -C 2 -X -o 4.aac 4.wav
  
  faac -P -R 48000 -B 16 -C 2 -X -o 5.aac 5.wav

  The console output like this :

  [hugeice@fedora19 trans]$ faac -P -R 48000 -B 16 -C 2 -X -o 5.aac 5.wav
  
  Freeware Advanced Audio Coder
  
  FAAC 1.28
  
  
  
  Quantization quality: 100
  
  Bandwidth: 16000 Hz
  
  Object type: Low Complexity(MPEG-2) + M/S
  
  Container format: Transport Stream (ADTS)
  
  Encoding 5.wav to 5.aac
  
     frame          | bitrate | elapsed/estim | play/CPU | ETA

  And concatenate this small aac files to a big aac files use :

  cat 1.aac 2.aac 3.aac 4.aac 5.aac > big.aac

  Now, if you play the big.aac, there is a momeniary interrupt at the segment boundary !

  The question becomes how segment coding and concatenate aac files smoothly ?