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Sur d’autres sites (11682)

  • 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


    


  • I want to convert images and sounds into video using php [closed]

    6 janvier 2023, par hossein ahmadi

    I have 5 pictures that contain 5 English words
Also, I have five audio files of pronunciation of the words above.

    


    I want to write a program with php that puts five pictures together with intervals of five seconds and plays the audio file of each according to the words.

    


    5s(word1.jpg)   5s(word2.jpg)   5s(word3.jpg)   ...
(audio1.mp3)    (audio2.mp3)    (audio3.mp3) ...
output.mp4


    


    I researched ffmpeg but still haven't found the answer to what I want to do

    


  • FFMPEG not extracting all the frames from a video

    19 mai 2018, par Jonathan Huang

    I am trying to extract all the frames from a video in order to get some training data for a tensor flow project. However whenever I run

    ffmpeg -i one.mp4 -r 1/1 "$filename%03d.jpeg"

    I only get 15 pictures. My phone films in 30fps, and the video was 13 seconds long, so shouldn’t I get roughly 490 pictures ?

    Is there an error in my understanding or am I using the wrong function ?