Recherche avancée

Sur d’autres sites (10263)

• how encode xdcam.mxf and set for mediainfo flag "standard : component"

  3 août 2018, par livio

  My goal is to encode an XdcamHD 50Mb .mxf, with ffmpeg or ffmbc or bmx, and get the following Mediainfo technical and tag data

  Format Settings, Matrix : Custom

  Standard : Component

  enter image description here

  When I try to convert with FFmbc I get a correct XdcamHD in every aspects, except the following Mediainfo technical data :

  Format Settings, Matrix : Default

  Standard : PAL

  enter image description here

  The target file and my file analized whith ffprobe are identical

  on the left target file on the right my encoded file

  enter image description here

  and this is my code

  ffmbc.exe -i %1 -tff -target xdcamhd422 -t 5 -y rewrapffmbc.mxf 

  When i try to convert with ffmpeg I obtain the same good file but if I read the technical and tag data in Mediainfo the flag "Standard :" has disappeared. Also in this case my file is being rejected from a Broadcast Company we deal with.

  here is the ffmpeg code

  ffmpeg.exe  -i %1 -r 25 -aspect 16:9 -pix_fmt yuv422p -color_primaries 1 -color_trc 1 -colorspace 1 -vcodec mpeg2video -non_linear_quant 1 -flags +ildct+ilme -top 1 -intra_vlc 1 -qmax 3 -lmin "1*QP2LAMBDA" -vtag xd5c -rc_max_vbv_use 1 -rc_min_vbv_use 1 -g 12 -b:v 50000k -minrate 50000k -maxrate 50000k -bufsize 3835k -bf 2 -trellis 1 -map 0:0 -map 0:1 -map 0:2 -map 0:1 -map 0:2 -map 0:1 -map 0:2 -map 0:1 -map 0:2  -map_channel 0.1.0:0.1.0 -map_channel 0.2.0:0.2.0  -map_channel 0.1.0:0.3.0 -map_channel 0.2.0:0.4.0  -map_channel 0.1.0:0.5.0 -map_channel 0.2.0:0.6.0  -map_channel 0.1.0:0.7.0 -map_channel 0.2.0:0.8.0 -c:a pcm_s24le -ar 48000 -ac 1 -map_metadata 0  -timecode 09:59:59:20 -y profilo-1.mxf

  Can someone provide a solution or a workaround ?

  Thank you

• Writing an image to linux framebuffer distorts the image C++

  8 avril 2021, par max

  Im trying to set up rtsp video stream from teledyne Dalsa Genie Nano camera. For grab images I'm using a framework provided by this company.
For rtsp stream I will use ffmpeg tool that can stream video directly from linux frame buffer.
  
So i tried to write this image via memcpy function and at this moment the image is not recorded correctly. because when i try to take a screenshot from Facebook with ffmpeg in output i have corrupted image.
  
Here's some information :

In the framework I have an image object that contains :

  


  

  1. void *address (address of one frame)

  


  2. int width (1280)

  


  3. int height (1024)

  


  4. int depth (1)

  


  


  So I wrote a function :


  


  It's working fine without any errors but when I print image from frame buffer (fb) I have

  


  

  


  I think it happens because fb device depth is 32 but frame depth is 1.

  


  Am I right ?

  


  I tried to change fb device depth with fbset tool but it returns an error -


  


  Command I use for taking an image from fb : sudo ffmpeg -f fbdev -framerate 1 -i /dev/fb0 -frames:v 1 screenAA3.jpeg

  


  Can someone tell me what I'm doing wrong ?

  


• deprecate AV_CODEC_ID_VOXWARE and introduce AV_CODEC_ID_METASOUND instead

  6 août 2013, par Kostya Shishkov

  deprecate AV_CODEC_ID_VOXWARE and introduce AV_CODEC_ID_METASOUND instead
  Voxware is the name of company, it has produced several audio codecs e.g.
  
  MetaVoice family and MetaSound.
  

  • [DBH] libavcodec/avcodec.h
  • [DBH] libavcodec/codec_desc.c
  • [DBH] libavcodec/version.h
  • [DBH] libavformat/riff.c