Recherche avancée

Sur d’autres sites (5404)

• Revision 36317 : Il y a certains cas où l’on ne peut pas passer par revision_mot notamment ...

  16 mars 2010, par kent1@… — Log

  Il y a certains cas où l’on ne peut pas passer par revision_mot notamment si on s’insère dans un formulaire d’édition d’article dans un pipeline pre_edition ... On ne passe pas la gestion des conflits dans ce cas là

• Send sprop-parameter-sets inband rather than in SDP

  21 janvier 2021, par Max

  I am trying to use ffmpeg to stream an MP4 file over rtp. I am sending the stream to a SFU server that will broadcast the stream to users. The clients are expecting to receive an h264 video stream with profile-level-id 42e01f. The issue I'm having is that the video received by the clients does not decode properly (just a black screen). If I transcode the video before sending, then everything works correctly. If I dump the SDP that describes what ffmpeg is sending, there is a distinct difference between the transcoded and non-transcoded version.

  


  For the non-transcoded version, my ffmpeg command looks like

  


  ffmpeg  '-re' \
  '-v' \
  'info' \
  '-protocol_whitelist' \
  'pipe,tls,file,http,https,tcp,rtp' \
  '-i' \
  '-f' 'mp4' \
  'https://storage.googleapis.com/my_bucket/file' \
  '-map' \
  '0:v:0' \
  '-c:v' \
  'copy' \
  '-f' \
  'rtp' \
  '-sdp_file' 'out.sdp' \
  'rtp://142.93.14.110:40425?rtcpport=45155'


  


  When I run this command, out.sdp contains the line

  


  a=fmtp:96 packetization-mode=1; sprop-parameter-sets=Z0LAH9kAUAW7AWoCAgKAAAH0gABdwAeMGSQ=,aMuMsg==; profile-level-id=42C01F


  


  However, if I change -c:v copy to -c:v libx264 -preset ultrafast, then the sdp line changes to a=fmtp:96 packetization-mode=1;. Given that there is no SDP exchange between ffmpeg and my SFU, I think the issue is that ffmpeg needs to be sending the sprops in-band rather than setting them in the sdp. Any help here would be amazing. The other possible issue is that the profile levels are sightly different.

  


• How to to burn subtitles based image on video using 'overlay_cuda', ffmpeg video filter

  4 septembre 2020, par jgkim0518

  I have to burn subtitles based image on video using ffmpeg(v4.3) and cuda, hardware accelerator. I want to use 'overlay_cuda' in filter complex.

  


  It is my command.

  


  ./ffmpeg -init_hw_device cuda=cuda:1 -hwaccel cuda -filter_hw_device cuda -hwaccel_output_format cuda -i 2_dump.ts -filter_complex "[v:0]scale_npp=1920:1080,format=yuv420p[base_video];[base_video][s:3]overlay_cuda[resurlt_video]" -map "[resurlt_video]" -map 0:a -c:v h264_nvenc -f mpegts subtitle_test.ts


  


  But it's fail.

  


  These are output massage included error.

  


  ffmpeg version 4.3 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-39)
configuration: --prefix=/usr/local --pkg-config-flags=--static --extra-cflags=-I/usr/local/include --extra-ldflags='-L/usr/local/lib -L/usr/local/lib64' --extra-libs='-lm -lpthread -lc' --bindir=/usr/local/bin --enable-cross-compile --enable-pic --enable-gpl --enable-libfdk_aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree --enable-cuda-nvcc --enable-cuvid --enable-nvenc --enable-libnpp --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64 --enable-libass --enable-static --disable-shared
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
[mpegts @ 0x4971500] start time for stream 5 is not set in estimate_timings_from_pts
[mpegts @ 0x4971500] start time for stream 6 is not set in estimate_timings_from_pts
[mpegts @ 0x4971500] start time for stream 7 is not set in estimate_timings_from_pts
[mpegts @ 0x4971500] start time for stream 8 is not set in estimate_timings_from_pts
[mpegts @ 0x4971500] start time for stream 9 is not set in estimate_timings_from_pts
[mpegts @ 0x4971500] start time for stream 10 is not set in estimate_timings_from_pts
[mpegts @ 0x4971500] start time for stream 11 is not set in estimate_timings_from_pts
[mpegts @ 0x4971500] start time for stream 12 is not set in estimate_timings_from_pts
Input #0, mpegts, from '2_dump.ts':
Duration: 00:05:09.80, start: 1.400000, bitrate: 12595 kb/s
Program 1 
Metadata:
  service_name    : Service01
  service_provider: AMUZLAB
Stream #0:0[0x100](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, 5.1(side), fltp, 384 kb/s
Stream #0:1[0x101](ind): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:2[0x102](zho): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:3[0x103](kho): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:4[0x104]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(top first), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 50 tbr, 90k tbn, 50 tbc
Stream #0:5[0x105](CHI): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
Stream #0:6[0x106](CHS): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
Stream #0:7[0x107](IND): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
Stream #0:8[0x108](THA): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
Stream #0:9[0x109](MAN): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
Stream #0:10[0x10a](MON): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
Stream #0:11[0x10b](BUR): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
Stream #0:12[0x10c](ENG): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
File 'subtitle_test.ts' already exists. Overwrite? [y/N] y
Stream mapping:
Stream #0:4 (h264) -> scale_npp (graph 0)
Stream #0:8 (dvbsub) -> overlay_cuda:overlay (graph 0)
overlay_cuda (graph 0) -> Stream #0:0 (h264_nvenc)
Stream #0:0 -> #0:1 (ac3 (native) -> mp2 (native))
Stream #0:1 -> #0:2 (ac3 (native) -> mp2 (native))
Stream #0:2 -> #0:3 (ac3 (native) -> mp2 (native))
Stream #0:3 -> #0:4 (ac3 (native) -> mp2 (native))
Press [q] to stop, [?] for help
[mpegts @ 0x4971500] sub2video: using 1920x1080 canvas
Impossible to convert between the formats supported by the filter 'Parsed_scale_npp_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 #0:4
Conversion failed!


  


  And, It is command line succeeded used 'overlay', software video filter, non_hardware accelerator.

  


  ./ffmpeg -hwaccel cuda -re -i 2_dump.ts -filter_complex "[0:v:0][0:s:3]overlay[v]" -map "[v]" -map 0:a -c:v h264_nvenc -f mpegts subtitle_test.ts


  


  How to to burn subtitles based image on video using ffmpeg(v4.3) and cuda, hardware accelerator ?

  


  Thank you.