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• PyAV/ffmpeg : How to resolve 'Reinit context to WxH ... deprecated pixel format'

  26 mai 2023, par hi im Bacon

  I am using the pyav library to read and process video data and as I am reading through the videos I am getting lots (and lots) of the following output.

  


  I am creating the videos by segmenting either a much larger source file or RTSP/HTTP IP camera.

  


  I would love to understand what this output actually means, and what I can do to prevent its output

  


  ffmpeg creating videos :

  


  ffmpeg -y -i https://manifest.googlevideo.com/api/... -pix_fmt yuvj422p -c:v libx264 -an -vf scale='min(1280,iw)':'min(720,ih)':force_original_aspect_ratio=decrease -r 12 -vsync cfr -x264opts keyint=12:min-keyint=12 -f segment -segment_format matroska -segment_time 5 -initial_offset 1656497474.686672 -strftime 1 /tmp/tmp87cc1n2o/%Y-%m-%dT%H%M%S.mkv -loglevel error


  


  python :

  


  container = av.open(io.BytesIO(...))
for frame in container.decode(video=0):
   ...


  


  2022-06-30 14:45:00,964 DEBUG:****:Creating <***.core.generators.av.AVGenerator object at 0x7f13340abd50> with target path: <_io.BytesIO object at 0x7f13341c93b0>
2022-06-30 14:45:00,966 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p
2022-06-30 14:45:00,966 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuvj422p
2022-06-30 14:45:00,984 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p
2022-06-30 14:45:01,045 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p
2022-06-30 14:45:01,046 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuvj422p
deprecated pixel format used, make sure you did set range correctly
deprecated pixel format used, make sure you did set range correctly
 (repeated 9 more times)
2022-06-30 14:45:01,194 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p
deprecated pixel format used, make sure you did set range correctly
deprecated pixel format used, make sure you did set range correctly
2022-06-30 14:45:01,215 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p
deprecated pixel format used, make sure you did set range correctly
deprecated pixel format used, make sure you did set range correctly
 (repeated 17 more times)
2022-06-30 14:45:01,384 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p
deprecated pixel format used, make sure you did set range correctly
deprecated pixel format used, make sure you did set range correctly
 (repeated 3 more times)
2022-06-30 14:45:01,398 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p
deprecated pixel format used, make sure you did set range correctly
deprecated pixel format used, make sure you did set range correctly
 (repeated 22 more times)
2022-06-30 14:45:01,550 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p
deprecated pixel format used, make sure you did set range correctly
deprecated pixel format used, make sure you did set range correctly
 (repeated 2 more times)
2022-06-30 14:45:01,592 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p


  


• avformat/mov : discard data streams with all zero sample_delta

  6 juillet 2022, par Zhao Zhili

  avformat/mov : discard data streams with all zero sample_delta
  Streams with all zero sample_delta in 'stts' have all zero dts.
  
  They have higher chance be chose by mov_find_next_sample(), which
  
  leads to seek again and again.
  For example, GoPro created a 'GoPro SOS' stream :
  
    Stream #0:4[0x5](eng) : Data : none (fdsc / 0x63736466), 13 kb/s (default)
  
      Metadata :
  
        creation_time : 2022-06-21T08:49:19.000000Z
  
        handler_name : GoPro SOS
  With 'ffprobe -show_frames http://example.com/gopro.mp4', ffprobe
  
  blocks until all samples in 'GoPro SOS' stream are consumed first.
  Signed-off-by : Zhao Zhili <zhilizhao@tencent.com>
  

  • [DH] libavformat/mov.c

• FFmpeg command to draw text hindi font is working fine in windows command prompt but Batch script and simple CPP program in NOT working

  1er juillet 2022, par Abdullah Farweez

  Below ffmpeg command in working fine in command prompt

  


  ffmpeg -i video.mp4 -filter_complex "drawtext=fontfile=Khula-regular.ttf:fontsize=60:fontcolor=blue:text=अगला एपिसोड देखने के लिए जल्दी से फॉलो करें:x=30:y=200" output.mp4


  


  giving expected result


  


  But if we run it as a bat file, it is not giving the expected output

  


      ::bat script start 
    @echo off
    ffmpeg -i video.mp4 -filter_complex "drawtext=fontfile=Khula-Regular.ttf:fontsize=60:fontcolor=blue:text=अगला एपिसोड देखने के लिए जल्दी से फॉलो करें:x=30:y=200" output.mp4
:: bat script end


  


  This the CPP program which calling the ffmpeg command via system method

  


  #include <iostream>&#xA;#include <cstring>&#xA;#include &#xA;&#xA;using namespace std;&#xA;&#xA;int main()&#xA;{&#xA;  string command = "ffmpeg.exe -i video.mp4 -filter_complex \"drawtext=fontfile=Khula-Regular.ttf:fontsize=60:fontcolor=yellow:text=अगला एपिसोड देखने के लिए जल्दी से फॉलो करें:x=30:y=200\" output.mp4";&#xA;  system(command.c_str());&#xA;  return 0;&#xA;}&#xA;</cstring></iostream>

  


  same behavior as bat script.

  


  screenshot of the output video.


  


  Here is the additional information for the references

  


  Folder structure

  


  .
|-- Khula-Regular.ttf
|-- cpp_program.exe
|-- command.cpp
|-- ffmpeg.exe
|-- ffplay.exe
|-- ffprobe.exe
|-- output.mp4
|-- run.bat
`-- video.mp4

C:\bin


  


  FFmpeg info

  


  $ ffmpeg
ffmpeg version N-107262-g4454142782-20220628 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 11.2.0 (crosstool-NG 1.24.0.533_681aaef)
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl --disable-libpulse --enable-libvmaf --disable-libxcb --disable-xlib --enable-amf --enable-libaom --enable-libaribb24 --enable-avisynth --enable-libdav1d --enable-libdavs2 --disable-libfdk-aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-libass --enable-libbluray --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librist --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --disable-libdrm --disable-vaapi --enable-libvidstab --enable-vulkan --enable-libshaderc --enable-libplacebo --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --enable-libzvbi --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-ldexeflags= --extra-libs=-lgomp --extra-version=20220628
  libavutil      57. 27.100 / 57. 27.100
  libavcodec     59. 34.100 / 59. 34.100
  libavformat    59. 25.100 / 59. 25.100
  libavdevice    59.  6.100 / 59.  6.100
  libavfilter     8. 41.100 /  8. 41.100
  libswscale      6.  6.100 /  6.  6.100
  libswresample   4.  6.100 /  4.  6.100
  libpostproc    56.  5.100 / 56.  5.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

Use -h to get full help or, even better, run 'man ffmpeg'


  


  PS : FFmpeg does not showing any error while processing in bat or cpp_program, but output is not giving in the specified font instead giving in random characters in the final output.mp4