Recherche avancée

Sur d’autres sites (8974)

• ffmpeg Using -movflags faststart

  16 mai 2019, par user3571514

  I tried to use the command -movflags faststart

  And got the following error :

  Microsoft Windows [Version 6.0.6002] Copyright (c) 2006 Microsoft
  Corporation. All rights reserved.

  C :\uploads\1\videos>ffmpeg -i simple1.mp4 -codec copy -map 0 -movflags faststart output.mp4

  -movflags faststart output.mp4 ffmpeg version N-34549-g13b7781, Copyright (c) 2000-2011 the FFmpeg developers built on Nov 6 2011
  22:02:08 with gcc 4.6.1 configuration : —enable-gpl
  —enable-version3 —disable-w32threads —enable-ru ntime-cpudetect —enable-avisynth —enable-bzlib —enable-frei0r —enable-libope ncore-amrnb —enable-libopencore-amrwb —enable-libfreetype
  —enable-libgsm —en able-libmp3lame —enable-libopenjpeg —enable-librtmp —enable-libschroedinger -
  -enable-libspeex —enable-libtheora —enable-libvo-aacenc —enable-libvo-amrwben c —enable-libvorbis —enable-libvpx —enable-libx264 —enable-libxavs —enable- libxvid —enable-zlib libavutil 51. 24. 0 / 51. 24. 0 libavcodec 53. 28. 0 / 53. 28.
  0 libavformat 53. 19. 0 / 53. 19. 0 libavdevice 53. 4. 0 / 53.
  4. 0 libavfilter 2. 47. 0 / 2. 47. 0 libswscale 2. 1. 0 / 2. 1. 0 libpostproc 51. 2. 0 / 51. 2. 0 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ’simple1.mp4’ : Metadata :
  major_brand : isom
  minor_version : 512
  compatible_brands : isomiso2avc1mp41
  encoder : Lavf54.29.104 Duration : 00:02:32.81, start : 0.000000, bitrate : 1166 kb/s
  Stream #0:0(und) : Video : h264 (Main) (avc1 / 0x31637661), yuv420p, 854x480 [ SAR 1:1 DAR 427:240], 1064 kb/s, 29.97 fps, 29.97 tbr, 90k
  tbn, 59.94 tbc
  Metadata :
  handler_name : VideoHandler
  Stream #0:1(und) : Audio : aac (mp4a / 0x6134706D), 44100 Hz, mono, s16, 93 kb /s
  Metadata :
  handler_name : [mp4 muxer @ 04179D00] [Eval @ 0027DAB8] Undefined constant or missing ’(’ in ’f aststart’

  [mp4 muxer @ 04179D00] Unable to parse option value "faststart"

  [mp4 muxer @ 04179D00] Error setting option movflags to value
  faststart.

  Output #0, mp4, to ’output.mp4’ : Metadata :
  major_brand : isom
  minor_version : 512
  compatible_brands : isomiso2avc1mp41
  encoder : Lavf54.29.104
  Stream #0:0(und) : Video : h264, yuv420p, 854x480 [SAR 1:1 DAR 427:240], q=2-3 1, 1064 kb/s, 29.97 fps, 90k tbn, 29.97 tbc
  Metadata :
  handler_name : VideoHandler
  Stream #0:1(und) : Audio : aac, 44100 Hz, mono, 93 kb/s
  Metadata :
  handler_name : Stream mapping : Stream #0:0 -> #0:0 (copy) Stream #0:1 -> #0:1 (copy)

  Could not write header for output file #0 (incorrect codec parameters ?)

• making screenshots from a wmv video with ffmpeg in linux [closed]

  28 avril 2013, par John

  when I try to make screenshots from a wmv video it shows-
  Error while decoding stream #0.1 - frame= 0 fps= 0 q=0.0 Lsize= -0kB time=10000000000.00 bitrate= -0.0kbits/s video:0kB audio:0kB global headers:0kB muxing overhead -inf%

  the command I am using for taking the video screenshots is - ffmpeg -i name.wmv -r 1/20 %03d.jpg

  I am using ffmpeg in linux, the video in question was originally encoded with Windows Media Video 9 and I can screenshot the video fine in windows but I cannot get it to work in linux.

  mediainfo shows the following - Video Format : VC-1 - Codec : WVC1, Microsoft

  ffmpeg -codecs|grep wmv shows that the wmv codec is already installed.

  avi, mpeg, mpg, mov and mp4 videos are all working fine, its only wmv file types which gives me this error so what can I do now ?

  thanks

• How to distinguish a physical D3D adapter from a virtual adapter used by the Remote Desktop Protocol ?

  31 octobre 2023, par rustak

  I'm currently developing a desktop application(c#/wpf) that decodes video using FFmpeg. I would like to give the user the option to select an adapter for video decoding. I'm using Direct3D method EnumAdapters to list available adapters on current device which works fine. The list of available adapters looks something like this :

  


  Adapter 0
  Description: Intel(R) HD Graphics 630
  Vendor ID:   0x8086
  Device ID:   0x5912
  SubSys ID:   0x86941043
  Revision:    4
  Luid:    46459
  Flags:    None
  Dedicated Video Memory:    128 MB
  Dedicated System Memory:  0 MB
  Shared System Memory:     8092 MB
Adapter 2
  Description: Microsoft Basic Render Driver
  Vendor ID:   0x1414
  Device ID:   0x8C
  SubSys ID:   0x0
  Revision:    0
  Luid:    50158
  Flags:    Software
  Dedicated Video Memory:    0 MB
  Dedicated System Memory:  0 MB
  Shared System Memory:     8092 MB


  


  I have noticed that an additional adapter appears in the list of available adapters when RDP is used. The additional adapter has the same properties as the physical one ; the only difference is in the LUID. The output looks something like this :

  


  Adapter 0
  Description: Intel(R) HD Graphics 630
  Vendor ID:   0x8086
  Device ID:   0x5912
  SubSys ID:   0x86941043
  Revision:    4
  Luid:    46459
  Flags:    None
  Dedicated Video Memory:    128 MB
  Dedicated System Memory:  0 MB
  Shared System Memory:     8092 MB
Adapter 1 // <- additional addapter
  Description: Intel(R) HD Graphics 630 
  Vendor ID:   0x8086
  Device ID:   0x5912
  SubSys ID:   0x86941043
  Revision:    4
  Luid:    1322913970
  Flags:    None
  Dedicated Video Memory:    128 MB
  Dedicated System Memory:  0 MB
  Shared System Memory:     8092 MB
Adapter 2
  Description: Microsoft Basic Render Driver
  Vendor ID:   0x1414
  Device ID:   0x8C
  SubSys ID:   0x0
  Revision:    0
  Luid:    50158
  Flags:    Software
  Dedicated Video Memory:    0 MB
  Dedicated System Memory:  0 MB
  Shared System Memory:     8092 MB


  


  I'm aware that the additional adapter is some kind of virtual adapter used by RDP. I have tried both of them, and it seems that both are suitable for video decoding using FFmpeg.

  


  However, from a UX perspective, it doesn't look or feel right that the combo box contains two adapters with the same name. So my question is : how can I distinguish a physical adapter from a virtual adapter used by the Remote Desktop Protocol ?