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• Is there any way to read frame from ffmpeg subprocess in Python ?

  18 septembre 2023, par Jester48

  Hi is there any way to read frame from FFMPEG ?

  


  import cv2

ffmpeg_cmd = ['ffmpeg', '-hwaccel_device','0','-hwaccel', 'cuda','-c:v','h264_cuvid', '-i', 'rtsp://URL/02a6b055-51b6-e30f-254c-0f462ed11587?stream=0&codec=h264','-vf', 'fps=1', '-pix_fmt', 'bgr24', '-f', 'rawvideo', '-']
pipe = subprocess.Popen(ffmpeg_cmd, stdout=subprocess.PIPE)


  


  I need get frame from this ffmpeg rtsp stream to numpy for upload to yolov5. I try many solution from google but it's not working on this.

  


• How to use ffmpeg on hardware acceleration with multiple inputs ?

  20 mars 2019, par Cole

  I’m trying to speed up the rendering of a video by using the GPU instead of the CPU. This code works, but I don’t know if I’m doing it correctly.

  ffmpeg -hwaccel cuvid -c:v hevc_cuvid \
  
  -i video.mp4 \
  
  -i logo.png \
  
  -i text.mov \
  
  -c:v h264_nvenc \
  
  -filter_complex " \
  
  [0]scale_npp=1920:1080,hwdownload,format=nv12[bg0]; \
  
  [bg0]trim=0.00:59.460,setpts=PTS-STARTPTS[bg0]; \
  
  [1]scale=150:-1[logo1];[bg0][logo1]overlay=(W-w)-10:(H-h)-10[bg0]; \
  
  [2]scale=500:-1[logo2];[logo2]setpts=PTS-STARTPTS[logo2]; \
  
  [bg0][logo2]overlay=-150:-100[bg0]; \
  
  [bg0]fade=in:00:30,fade=out:1750:30[bg0]" \
  
  -map "[bg0]" -preset fast -y output.mp4 

  I feel like I need to be using hwuplaod somewhere in there, but I’m not totally sure. Any help would be appreciated.

  Log from run :

  ffmpeg version 4.0 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.11) 20160609
  
    configuration: --enable-gpl --enable-libx264 --enable-cuda --enable-nvenc --enable-cuvid --enable-nonfree --enable-libnpp --extra-cflags=-I/usr/local/cuda/include/ --extra-ldflags=-L/usr/local/cuda/lib64/
  
    libavutil      56. 14.100 / 56. 14.100
  
    libavcodec     58. 18.100 / 58. 18.100
  
    libavformat    58. 12.100 / 58. 12.100
  
    libavdevice    58.  3.100 / 58.  3.100
  
    libavfilter     7. 16.100 /  7. 16.100
  
    libswscale      5.  1.100 /  5.  1.100
  
    libswresample   3.  1.100 /  3.  1.100
  
    libpostproc    55.  1.100 / 55.  1.100
  
  [hevc @ 0x3eb04c0] vps_num_hrd_parameters -1 is invalid
  
  [hevc @ 0x3eb04c0] VPS 0 does not exist
  
  [hevc @ 0x3eb04c0] SPS 0 does not exist.
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2mp41
  
      encoder         : Lavf58.7.100
  
    Duration: 00:00:59.46, start: 0.000000, bitrate: 5894 kb/s
  
      Stream #0:0(und): Video: hevc (Main) (hev1 / 0x31766568), yuv420p(tv, progressive), 3840x2160 [SAR 1:1 DAR 16:9], 5891 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 29.97 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  Input #1, png_pipe, from 'logo.png':
  
    Duration: N/A, bitrate: N/A
  
      Stream #1:0: Video: png, rgba(pc), 528x128 [SAR 11339:11339 DAR 33:8], 25 tbr, 25 tbn, 25 tbc
  
  Input #2, mov,mp4,m4a,3gp,3g2,mj2, from 'text.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 512
  
      compatible_brands: qt  
  
      encoder         : Lavf57.56.100
  
    Duration: 00:00:06.00, start: 0.000000, bitrate: 1276 kb/s
  
      Stream #2:0(eng): Video: qtrle (rle  / 0x20656C72), bgra, 1920x1080, 1274 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 12800 tbn, 12800 tbc (default)
  
      Metadata:
  
        handler_name    : DataHandler
  
  Stream mapping:
  
    Stream #0:0 (hevc_cuvid) -> scale_npp
  
    Stream #1:0 (png) -> scale
  
    Stream #2:0 (qtrle) -> scale
  
    fade -> Stream #0:0 (h264_nvenc)
  
  Press [q] to stop, [?] for help
  
  Output #0, mp4, to 'output.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2mp41
  
      encoder         : Lavf58.12.100
  
      Stream #0:0: Video: h264 (h264_nvenc) (Main) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 2000 kb/s, 29.97 fps, 30k tbn, 29.97 tbc (default)
  
      Metadata:
  
        encoder         : Lavc58.18.100 h264_nvenc
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/2000000 buffer size: 4000000 vbv_delay: -1
  
  frame= 1783 fps=151 q=30.0 Lsize=   15985kB time=00:00:59.45 bitrate=2202.4kbits/s dup=4 drop=0 speed=5.04x    
  
  video:15977kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.050389%

  Not sure what to make of this, pretty new to ffmpeg.

• Codec 'mpeg4' (12) is not supported by the bitstream filter 'h264_mp4toannexb [migrated]

  11 juillet 2021, par Karan

  rohit@rohit : /Desktop/hyland$ ffmpeg -y -i sample.mov -codec copy -bsf h264_mp4toannexb -map 0 -f segment -segment_time 5 -segment_format mpegts -segment_list "segments/prog_index.m3u8" -segment_list_type m3u8 segments/fileSequence%d.ts
ffmpeg version n4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 7 (Ubuntu 7.5.0-3ubuntu1 18.04)
configuration : —prefix= —prefix=/usr —disable-debug —disable-doc —disable-static —enable-cuda —enable-cuda-sdk —enable-cuvid —enable-libdrm —enable-ffplay —enable-gnutls —enable-gpl —enable-libass —enable-libfdk-aac —enable-libfontconfig —enable-libfreetype —enable-libmp3lame —enable-libnpp —enable-libopencore_amrnb —enable-libopencore_amrwb —enable-libopus —enable-libpulse —enable-sdl2 —enable-libspeex —enable-libtheora —enable-libtwolame —enable-libv4l2 —enable-libvorbis —enable-libvpx —enable-libx264 —enable-libx265 —enable-libxcb —enable-libxvid —enable-nonfree —enable-nvenc —enable-omx —enable-openal —enable-opencl —enable-runtime-cpudetect —enable-shared —enable-vaapi —enable-vdpau —enable-version3 —enable-xlib
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
libswscale 5. 7.100 / 5. 7.100
libswresample 3. 7.100 / 3. 7.100
libpostproc 55. 7.100 / 55. 7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample.mov' :
Metadata :
major_brand : qt
  
minor_version : 512
compatible_brands : qt
  
encoder : Lavf58.17.101
Duration : 00:00:52.08, start : 0.000000, bitrate : 1674 kb/s
Stream #0:0(eng) : Video : mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1544 kb/s, 24 fps, 24 tbr, 12288 tbn, 24 tbc (default)
Metadata :
handler_name : VideoHandler
encoder : Lavc58.22.101 mpeg4
Stream #0:1(eng) : Audio : aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
Metadata :
handler_name : SoundHandler
[h264_mp4toannexb @ 0x5626984d8740] Codec 'mpeg4' (12) is not supported by the bitstream filter 'h264_mp4toannexb'. Supported codecs are : h264 (27)
Error initializing bitstream filter : h264_mp4toannexb
Stream mapping :
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
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