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• How to fix grainy recoding with ffmpeg mp4 x264 ?

  21 mars 2020, par teenserie

  I recorded the audio and video stream from a streaming with ffmpeg. when I go to re-encode the file using libx264, the video in the movements looks bad and grainy as in the image.
Where did I go wrong ?

  



  

  



  this is the code I used

  



  ffmpeg -i input.mp4 -c:v libx264 -c:a aac output.mp4


  



  and these are mediainfo of original file

  



      Metadata:
    major_brand     : isom
    minor_version   : 1
    compatible_brands: isom
    creation_time   : 2020-03-19T22:43:32.000000Z
  Duration: 00:39:51.99, start: 0.000000, bitrate: 1300 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x1080 [SAR 3:2 DAR 16:9], Closed Captions, 1268 kb/s, 59.94 fps, 59.94 tbr, 90k tbn, 59.94 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(spa): Audio: aac (HE-AACv2) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 22 kb/s (default)
    Metadata:
      handler_name    : SoundHandler


  



  mediainfo of the file recoded

  



   Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
  Duration: 00:39:51.99, start: 0.000000, bitrate: 7924 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], Closed Captions, 7892 kb/s, 59.94 fps, 59.94 tbr, 60k tbn, 119.88 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(spa): Audio: aac (HE-AACv2) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 22 kb/s (default)
    Metadata:
      handler_name    : SoundHandler


  



  How can I recode the file without loss of quality ? (sorry for my poor english)

  


• ffmpeg have unmet dependencies (Ubuntu20) [closed]

  10 août 2024, par mojiang

  when installing ffmpeg with ubuntu20(fosal), it have conflict dependencies :

  


  # sudo apt-get install ffmpeg
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 ffmpeg : Depends: libavdevice58 (= 7:4.2.7-0ubuntu0.1) but it is not going to be installed
          Depends: libavfilter7 (= 7:4.2.7-0ubuntu0.1)
          Depends: libavformat58 (= 7:4.2.7-0ubuntu0.1) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.


  


  I solved it by install the reason of conflit library with a specific version, may be someone will need the solution.

  


  step 1. fix-broken

  


  sudo apt --fix-broken install
Reading package lists... Done
Building dependency tree       
Reading state information... Done


  


  step2. find the reason of unmet dependencies :

  


  # sudo apt install libavdevice58=7:4.2.7-0ubuntu0.1 libavfilter7=7:4.2.7-0ubuntu0.1 libavformat58=7:4.2.7-0ubuntu0.1
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libavformat58 : Depends: libchromaprint1 (>= 1.3.2) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.


  


  Here the problem is from libchromaprint1

  


  step3. find candidate versions of libchromaprint1(conflict reason)

  


  # apt-cache policy libchromaprint1
libchromaprint1:
  Installed: (none)
  Candidate: 1.5.1-1~20.04.sav0
  Version table:
     1.5.1-1~20.04.sav0 500
        500 http://ppa.launchpad.net/savoury1/multimedia/ubuntu focal/main amd64 Packages
     1.4.3-3build1 500
        500 http://mirrors.cloud.aliyuncs.com/ubuntu focal/universe amd64 Packages
        500 http://archive.ubuntu.com/ubuntu focal/universe amd64 Packages


  


  step4. install the old version of libchromaprint1 to solve the conflicts

  


  # sudo apt install libchromaprint1=1.4.3-3build1
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  libchromaprint1
0 upgraded, 1 newly installed, 0 to remove and 223 not upgraded.
Need to get 37.6 kB of archives.


  


  step5. reinstall ffmpeg

  


  # sudo apt install ffmpeg
Reading package lists... Done
Building dependency tree       
Reading state information... Done


  


  Done. the reason of conflict is that the latest version of libraries have conflict, by install old version of the conflicted ones to solve it.

  


• Révision 101151 : Mise à jour de librairie getid3 en 1.9.13

  17 décembre 2016, par kent1@arscenic.info

  https://github.com/JamesHeinrich/getID3/releases/tag/v1.9.13

  bugfix #89 : ID3v2.4 custom genres with slashes
  bugfix #88 : large QuickTime files exceed PHP memory limit
  bugfix #87 : ID3v2 write GRID data not working properly
  bugfix #86 : Increase autoloading definitions
  bugfix #84 : ID3v2 available writable frames list
  bugfix #82 : ID3v2 datetime logic
  bugfix #80 : attempt to autodetect ID3v1 encoding
  bugfix #77 : add partial support of DSSv6
  bugfix #76 : add mysqli version of caching extension
  bugfix #75 : mysql cache max key length
  bugfix #71 : custom error handler to catch exif_read_data() errors
  bugfix #71 : add support for mb_convert_encoding
  bugfix #70 : ID3v2 POPM / UFID
  bugfix #68 : workaround broken iTunes ID3v2
  bugfix #48 : Quicktime set MIME to video/mp4 where applicable
  bugfix #1930 fread on pipes
  bugfix #1926 relax ID3v2.IsValidURL check