Recherche avancée

Sur d’autres sites (8285)

• Playlist formats with FFMPEG

  28 août 2013, par shaish

  I have a C application, based on FFMPEG, thats processes audio streams.
  everything works if i use a direct stream url like : mms ://xxx.yyy.zzz, or a direct link to a MP3/aac file.

  however,many streams online come in a playlist format like .pls, .m3u, and .asx

  does libavformat (or ffmpeg in general) has support for such formats, or do i need to parse them myself ?
  (just opening these urls with avformat_open_input gives me an error.)

  if not possible with ffmpeg - are there any (simple) libraries out there that can do it ?

  Thanks

• Burn subtitles Ffmpeg Segmantation Fault error

  5 septembre 2012, par Batuhan Topbaş

  I have vps and ffmpeg latest version. I wanna burn subtitles on videos then i use this input

  ffmpeg -i ohd.avi -report -acodec copy -strict -2 -vcodec libx264 -acodec aac -sameq -vf ass=ohd.ass outputass.mp4

  But this is give me error. Segmantation Fault. See in output..

      ffmpeg started on 2012-09-05 at 10:30:37
  
  Report written to "ffmpeg-20120905-103037.log"
  
  ffmpeg version N-44073-g54ca7e3 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Aug 31 2012 16:15:40 with gcc 4.1.2 (GCC) 20080704 (Red Hat 4.1.2-52)
  
    configuration: --enable-libfreetype --enable-libx264 --enable-gpl --enable-libfaac --enable-libass --enable-nonfree
  
    libavutil      51. 70.100 / 51. 70.100
  
    libavcodec     54. 55.100 / 54. 55.100
  
    libavformat    54. 25.104 / 54. 25.104
  
    libavdevice    54.  2.100 / 54.  2.100
  
    libavfilter     3. 15.101 /  3. 15.101
  
    libswscale      2.  1.101 /  2.  1.101
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  Input #0, avi, from 'ohd.avi':
  
    Metadata:
  
      encoder         : Lavf54.25.104
  
    Duration: 00:01:00.22, start: 0.000000, bitrate: 4538 kb/s
  
      Stream #0:0: Video: h264 (High) (H264 / 0x34363248), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 23.98 tbn, 47.95 tbc
  
      Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 44100 Hz, stereo, s16, 192 kb/s
  
  File 'outputass.mp4' already exists. Overwrite ? [y/N] y
  
  FreeType library version: 2.2.1
  
  [Parsed_ass_0 @ 0xa6b4b00] FreeType headers version: 2.2.1
  
  [Parsed_ass_0 @ 0xa6b4b00] Init
  
  [Parsed_ass_0 @ 0xa6b4b00] File size: 622
  
  [Parsed_ass_0 @ 0xa6b4b00] [0xa6b7420] Style: Default,FreeSerif,24,&H00FFFFFF,&H00FFFFFF,&H00FFFFFF,&H00C0C0C0,-1,0,0,0,100,100,0,0.00,1,2,3,2,20,20,20,1
  
  [Parsed_ass_0 @ 0xa6b4b00] Added subtitle file: 'ohd.ass' (1 styles, 1 events)
  
  [Parsed_ass_0 @ 0xa6b4b00] Fontconfig disabled, only default font will be used.
  
  [graph 0 input from stream 0:0 @ 0xa6cd900] w:1280 h:720 pixfmt:yuv420p tb:1001/24000 fr:24000/1001 sar:1/1 sws_param:flags=2
  
  [graph 1 input from stream 0:1 @ 0xa6b0ae0] tb:1/44100 samplefmt:s16 samplerate:44100 chlayout:0x3
  
  [audio format for output stream 0:1 @ 0xa6b0c60] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the filter 'audio format for output stream 0:1'
  
  [auto-inserted resampler 0 @ 0xa6b17c0] chl:stereo fmt:s16 r:44100Hz -> chl:stereo fmt:flt r:44100Hz
  
  [libx264 @ 0xa6bfa20] using SAR=1/1
  
  [libx264 @ 0xa6bfa20] using cpu capabilities: MMX2 SSE2Fast FastShuffle SSEMisalign LZCNT
  
  [libx264 @ 0xa6bfa20] profile High, level 3.1
  
  [libx264 @ 0xa6bfa20] 264 - core 125 r2208 d9d2288 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=23 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'outputass.mp4':
  
    Metadata:
  
      encoder         : Lavf54.25.104
  
      Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 24k tbn, 23.98 tbc
  
      Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, flt, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> libx264)
  
    Stream #0:1 -> #0:1 (ac3 -> aac)
  
  Press [q] to stop, [?] for help
  
  Segmentation fault

  What is wrong my input code ? i can't find because i am amateur.

• Configure and Build OpenCV to Custom FFMPEG Install

  4 avril 2017, par enderland

  I cannot seem to configure OpenCV to link to a non-/usr/lib set of FFMPEG libraries.

  My LD_LIBRARY_PATH contains a direct link to the folder for the custom install of FFMPEG :

  LD_LIBRARY_PATH=/pathto/ffmpeg-0.10.2/lib

  Additionally, I’ve configured pkgconfig as :

  PKG_CONFIG_PATH=/samepathto/ffmpeg-0.10.2/lib/pkgconfig/

  Within CMake however I cannot find any setting for path to FFMPEG - either in basic or custom. The only setting related to FFMPEG appears to be WITH_FFMPEG type setting (set to ON).

  I can build OpenCV but it seems to link to the system libraries for libavcodec - this causes a conflict as the system libraries are version .52 and the version in my install of FFMPEG are .53. Linking an app on a machine without the same system libraries seems to NOT link to my custom install of OpenCV (specifically the libavcodec) because of this (I’m installing these libraries on a shared network folder).

  I am not sure if my problem is with building and linking to the wrong version of FFMPEG or if it is something with my environment after building (and then linking to the wrong ffmpeg).

  I am building on Linux, Redhat 6, OpenCV 2.3.1.