[FFmpeg-trac] #5995(undetermined:new): Blockiness and ringing in prores4444 encoded video with alpha

FFmpeg trac at avcodec.org
Tue Dec 6 13:22:56 EET 2016


#5995: Blockiness and ringing in prores4444 encoded video with alpha
-------------------------------------+-------------------------------------
             Reporter:  stib         |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
  prores,alpha                       |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by stib):

 I tried to ftp the movie, but I couldn't connect to the server. connecting
 using
 {{{ftp ftp://anonymous@upload.ffmpeg.org}}} timed out, and when I
 connected with {{{sftp ftp://anonymous@upload.ffmpeg.org}}} it asked for a
 password and wouldn't take an empty one or 'anonymous'.

 Anyway the problem still occurs when the source is a png image, so I've
 attached one.

 This is the command I've been using with the png source:
 {{{ffmpeg -i source.png  -c:v prores_ks -pix_fmt yuva444p10le -quant_mat
 'hq' -profile:v 4 output.mov}}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5995#comment:2>
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