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• avfilter/vf_scale : set correct AVFrame SAR if reset_sar=1

  16 juin, par Niklas Haas

  avfilter/vf_scale : set correct AVFrame SAR if reset_sar=1
  This otherwise generates an inconsistency between the frame state and the
  
  link state, since the link state is set to 1:1 explicitly when `reset_sar`
  
  is enabled, but this line of code unconditionally overwrote the output
  
  frame SAR with the value that would be computed in the absence of `reset_sar`.
  cf. vf_scale_cuda, which does this correctly
  

  • [DH] libavfilter/vf_scale.c

• avcodec/ppc/mpegvideo_altivec : Use correct inter scantable

  22 mars, par Andreas Rheinhardt

  avcodec/ppc/mpegvideo_altivec : Use correct inter scantable
  This affected the WMV1/2 encoders (but not when running FATE because
  
  the encoding part uses the fastint dct, so this code isn't used
  
  then anyway).
  It did not affect anything else, because a) only WMV1/2 use different
  
  scantables, b) ff_msmpeg4_decode_block() (and therefore the WMV1
  
  decoder) already unquantize inter macroblocks as they are parsed
  
  c) the WMV2 decoder does not use the unquantize functions for inter
  
  macroblocks at all.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/ppc/mpegvideo_altivec.c

• How can I make an rtsp stream as correct as possible in a Django application ? [closed]

  4 décembre 2024, par user25336067

  I am writing a mini video surveillance system on Django. I want the stream to be output to the tag. now I have output to the img tag using a stream and jpeg images (using OpenCV)how to make a stream from a video, you may need to use WebRTC for the stream and somehow decode the video using ffmpeg, please tell me

  


  def generate_frames(rtsp_url):
    cap = cv2.VideoCapture(rtsp_url)  # Замените на ваш RTSP URL

    while True:
        success, frame = cap.read()
        if not success:
            break

        # Кодируем кадр в JPEG
        ret, buffer = cv2.imencode('.jpeg', frame)
        frame = buffer.tobytes()

        yield (b'--frame\r\n'
               b'Content-Type: photo/jpg\r\n\r\n' + frame + b'\r\n')


  


  i vant to stop video and start in video tag
my html looks like this

  


    <div class="video-container">&#xA;    <img src="http://stackoverflow.com/feeds/tag/{% url &#38;#x27;video_feed&#38;#x27; %}?rtspurl={{ rtsp_url }}" width='300' height='225' alt="{{ rtsp_url }}" />&#xA;    <div class="separator"></div>  &#xA;    <p class="cam-name">Трансляция камеры: {{ cam_name }}<br />RTSP: <a>{{ rtsp_url }}</a></p>&#xA;  </div>&#xA;