Recherche avancée

Sur d’autres sites (7894)

• ffmpeg pipe output and script [duplicate]

  27 juillet 2018, par James Magnus

  This question already has an answer here :

  • Execute command in a variable don’t execute the latter part of a pipe
    
    1 answer
    

  I need to extract raw video and pipe it to another program. This runs perfectly in a terminal :

  ffmpeg -i SampleVideo_1280x720_5mb.mp4 -s 1920x1080 -c:v rawvideo -pix_fmt yuv420p -f rawvideo - | ffplay -f rawvideo -pix_fmt yuv420p -s 1920x1080 -

  But when I try to run this command from a script it fails. Here is a very simplified version of the script :

  #!/bin/bash
  
  
  
  c='ffmpeg -i SampleVideo_1280x720_5mb.mp4 -s 1920x1080 -c:v rawvideo -pix_fmt yuv420p -f rawvideo - | ffplay -f rawvideo -pix_fmt yuv420p -s 1920x1080 -'
  
  $c

  The output

  ~/ets/videos$ ./test.sh 
  
  ffmpeg version N-91403-gd24c9e5 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  
    configuration: --extra-cflags='-fPIC -I/home/jlbeaussart/ffmpeg_build/include' --extra-ldflags=-L/home/jlbeaussart/ffmpeg_build/lib --extra-libs='-lpthread -lm' --enable-gpl --enable-libaom --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-shared --enable-libcaca --enable-libxvid --enable-libxml2 --enable-opencl --enable-opengl --enable-cuvid --enable-ffnvcodec --enable-libdrm --enable-nvenc --enable-nvdec --enable-vaapi --enable-vdpau --enable-nonfree
  
    libavutil      56. 18.102 / 56. 18.102
  
    libavcodec     58. 20.104 / 58. 20.104
  
    libavformat    58. 17.101 / 58. 17.101
  
    libavdevice    58.  4.101 / 58.  4.101
  
    libavfilter     7. 25.100 /  7. 25.100
  
    libswscale      5.  2.100 /  5.  2.100
  
    libswresample   3.  2.100 /  3.  2.100
  
    libpostproc    55.  2.100 / 55.  2.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'SampleVideo_1280x720_5mb.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      creation_time   : 1970-01-01T00:00:00.000000Z
  
      encoder         : Lavf53.24.2
  
    Duration: 00:00:29.57, start: 0.000000, bitrate: 1421 kb/s
  
      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1032 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        creation_time   : 1970-01-01T00:00:00.000000Z
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 383 kb/s (default)
  
      Metadata:
  
        creation_time   : 1970-01-01T00:00:00.000000Z
  
        handler_name    : SoundHandler
  
  [NULL @ 0x18d5d40] Unable to find a suitable output format for '|'
  
  |: Invalid argument

• how to use ffmpeg with mjpeg_vaapi encoder (with hardware acceleration) ?

  8 août 2018, par Marat

  When I use ffmpeg with mjpeg encoder without hardware acceleration, everything works fine. I use following command :

  ffmpeg -nostdin -rtsp_transport udp_multicast -allowed_media_types 'video' -i 'rtsp://MYIP' -ss 00:00:0.00 -f image2pipe -q:v 24 -vf scale=-2:480,format=yuv420p -c:v mjpeg -vframes 1 pipe:1

  But, when I try to use mjpeg with hardware acceleration, I always get error :

  ffmpeg -nostdin -rtsp_transport udp_multicast -allowed_media_types 'video' -hwaccel vaapi -vaapi_device /dev/dri/renderD128 -hwaccel_output_format vaapi -i 'rtsp://MYIP' -ss 00:00:0.00 -f image2pipe -q:v 24 -vf scale=-2:480,format=yuv420p -c:v mjpeg_vaapi -vframes 1 pipe:1
  
  ffmpeg version N-91514-gc51e0cd Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  
    configuration: --pkg-config-flags=--static
  
    libavutil      56. 18.102 / 56. 18.102
  
    libavcodec     58. 21.106 / 58. 21.106
  
    libavformat    58. 17.101 / 58. 17.101
  
    libavdevice    58.  4.101 / 58.  4.101
  
    libavfilter     7. 26.100 /  7. 26.100
  
    libswscale      5.  2.100 /  5.  2.100
  
    libswresample   3.  2.100 /  3.  2.100
  
  libva info: VA-API version 0.39.0
  
  libva info: va_getDriverName() returns 0
  
  libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
  
  libva info: Found init function __vaDriverInit_0_39
  
  libva info: va_openDriver() returns 0
  
  Input #0, rtsp, from 'rtsp://MYIP':
  
    Metadata:
  
      title           : Session streamed with GStreamer
  
      comment         : rtsp-server
  
    Duration: N/A, start: 0.180600, bitrate: N/A
  
      Stream #0:0: Video: h264 (Main), yuvj420p(pc, progressive), 800x600, 50 fps, 50 tbr, 90k tbn, 100 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> mjpeg (mjpeg_vaapi))
  
  Impossible to convert between the formats supported by the filter 'graph 0 input from stream 0:0' and the filter 'auto_scaler_0'
  
  Error reinitializing filters!
  
  Failed to inject frame into filter network: Function not implemented
  
  Error while processing the decoded data for stream #0:0
  
  Conversion failed!

  I tried with some additional options but it still keeps failing :

  ffmpeg -nostdin -rtsp_transport udp_multicast -allowed_media_types 'video' -hwaccel vaapi -vaapi_device /dev/dri/renderD128 -hwaccel_output_format vaapi -i 'rtsp://MYIP' -ss 00:00:0.00 -f image2pipe -q:v 24 -vf "scale_vaapi=w=800:h=600" -b:v 700k -r 25 -vcodec mjpeg_vaapi -vframes 1 pipe:1                
  
  ffmpeg version N-91514-gc51e0cd Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  
    configuration: --pkg-config-flags=--static
  
    libavutil      56. 18.102 / 56. 18.102
  
    libavcodec     58. 21.106 / 58. 21.106
  
    libavformat    58. 17.101 / 58. 17.101
  
    libavdevice    58.  4.101 / 58.  4.101
  
    libavfilter     7. 26.100 /  7. 26.100
  
    libswscale      5.  2.100 /  5.  2.100
  
    libswresample   3.  2.100 /  3.  2.100
  
  libva info: VA-API version 0.39.0
  
  libva info: va_getDriverName() returns 0
  
  libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
  
  libva info: Found init function __vaDriverInit_0_39
  
  libva info: va_openDriver() returns 0
  
  Input #0, rtsp, from 'rtsp://MYIP':
  
    Metadata:
  
      title           : Session streamed with GStreamer
  
      comment         : rtsp-server
  
    Duration: N/A, start: 0.179933, bitrate: N/A
  
      Stream #0:0: Video: h264 (Main), yuvj420p(pc, progressive), 800x600, 50 fps, 50 tbr, 90k tbn, 100 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> mjpeg (mjpeg_vaapi))
  
  [mjpeg_vaapi @ 0x374cd80] Encoding entrypoint not found (12 / 7).
  
  Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  Conversion failed!

  Can please anyone suggest right options to make it work ?

• avformat/mov : Check default_encrypted_sample before use in mov_read_sample_encryption...

  21 juillet 2018, par Michael Niedermayer

  avformat/mov : Check default_encrypted_sample before use in mov_read_sample_encryption_info()
  Fixes : 2018-0721-sample
  
  Fixes : null pointer dereference
  Found-by : Nikita Knyzhov (knnikita@yandex.ru)
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/mov.c