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• avformat/http: return EINVAL from ff_http_do_new_request() if re-used with different...

  13 décembre 2017, par Aman Gupta

  avformat/http: return EINVAL from ff_http_do_new_request() if re-used with different hostname
  This will prevent improper use of ff_http_do_new_request() if the user
  
  tries to send a request for a different host to a previously connected
  
  persistent http/1.1 connection.
  Signed-off-by : Aman Gupta <aman@tmm1.net>
  
  Signed-off-by : Karthick J <kjeyapal@akamai.com>
  

  • [DH] libavformat/http.c

• How to record audio and video on macos with ffmpeg ?

  5 janvier 2024, par chovy

  $ ffmpeg -f avfoundation -list_devices true -i ""
...
[AVFoundation indev @ 0x7fa8c24312c0] AVFoundation video devices:
[AVFoundation indev @ 0x7fa8c24312c0] [0] FaceTime HD Camera
[AVFoundation indev @ 0x7fa8c24312c0] [1] Capture screen 0
[AVFoundation indev @ 0x7fa8c24312c0] AVFoundation audio devices:
[AVFoundation indev @ 0x7fa8c24312c0] [0] MacBook Pro Microphone


  


  These are my audio and video devices.
I'm trying to record audio from mic and video capture of screen.
However when I try to run the command I get this error :

  


  $ ffmpeg -f avfoundation -i "1:0"  \             
  ~/Videos/screencast.mp4
ffmpeg version 4.3.2 Copyright (c) 2000-2021 the FFmpeg developers
  built with Apple clang version 12.0.0 (clang-1200.0.32.29)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
[AVFoundation indev @ 0x7fced1c315c0] Configuration of video device failed, falling back to default.
[avfoundation @ 0x7fced2009000] Selected pixel format (yuv420p) is not supported by the input device.
[avfoundation @ 0x7fced2009000] Supported pixel formats:
[avfoundation @ 0x7fced2009000]   uyvy422
[avfoundation @ 0x7fced2009000]   yuyv422
[avfoundation @ 0x7fced2009000]   nv12
[avfoundation @ 0x7fced2009000]   0rgb
[avfoundation @ 0x7fced2009000]   bgr0
[avfoundation @ 0x7fced2009000] Overriding selected pixel format to use uyvy422 instead.


  


  Additionally I'd like to capture camera in lower right. This is how I do it on Linux, but the basics don't even work on MacOS.

  


  screencap() {
  file=`date +%Y-%m-%d-%H.%M.%S`
  ffmpeg -f alsa -i pulse -f x11grab -thread_queue_size 64 -i :0.0 \
  -video_size 384x216 -i /dev/video0 \
        -filter_complex 'overlay=main_w-overlay_w:main_h-overlay_h' \
  -r 60 -preset ultrafast ~/Videos/screencast-${file}.mp4
}


  


• What is the best way to split a transport stream file ?

  27 mars 2016, par scaryguy

  I have a .ts file (Download files here : http://dropcanvas.com/2gmsg/1).

  I want to split this video while I expect ALL other properties remain same including pts time.

  Here is what I try to achieve this :

  ffmpeg -ss 0.000 -i sample.ts -y -c copy -t 3 splitted.ts

  Expected start time : 94678.950389
  New start time : 1.402367

  I expect the above command should only take first 3 seconds of the .ts file and all other stuff to stay same. I’ve seen copyts and copytb options from the documentation but I wasn’t able to use them.

  So how do I do this ?

  Thank you

  Here are the logs for copyts. It creates a 0 byte splitted.ts file :

  ffmpeg -ss 0:00:00 -i sample.ts -to 00:00:03 -y -c copy -copyts splitted.ts
  
  ffmpeg version 3.0 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with Apple LLVM version 7.0.0 (clang-700.0.72)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.0 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libxvid --enable-libfreetype --enable-libvorbis --enable-libvpx --enable-libass --enable-ffplay --enable-libfdk-aac --enable-libopus --enable-libx265 --enable-nonfree --enable-vda
  
    libavutil      55. 17.103 / 55. 17.103
  
    libavcodec     57. 24.102 / 57. 24.102
  
    libavformat    57. 25.100 / 57. 25.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 31.100 /  6. 31.100
  
    libavresample   3.  0.  0 /  3.  0.  0
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  [NULL @ 0x7fafac02fc00] start time for stream 2 is not set in estimate_timings_from_pts
  
  Input #0, mpegts, from 'sample.ts':
  
    Duration: 00:00:10.07, start: 94678.950389, bitrate: 934 kb/s
  
    Program 1
  
      Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 854x480 [SAR 1280:1281 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
  
      Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 140 kb/s
  
      Stream #0:2[0x102]: Data: timed_id3 (ID3  / 0x20334449)
  
  Output #0, mpegts, to 'splitted.ts':
  
    Metadata:
  
      encoder         : Lavf57.25.100
  
      Stream #0:0: Video: h264 ([27][0][0][0] / 0x001B), yuv420p, 854x480 [SAR 1280:1281 DAR 16:9], q=2-31, 29.97 fps, 29.97 tbr, 90k tbn, 90k tbc
  
      Stream #0:1: Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, 140 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=    0 fps=0.0 q=-1.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
  
  video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)