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• Raspberry Pi cannot connect to IP camera, while Windows PC can ?

  28 novembre 2020, par gf000

  I have an IP camera (Provision ISR, DI-320IPS-VF, 2MP IR Vari-Focal Dome IP Camera). When I connect it to my router (it is a 10 or 12 years old TP-LINK TL-WR1043ND), it will immediately show up in "IP Manager" (this is a program by the manufacturer) on my Windows PC. If I double click on the camera's row, Internet Explorer opens up, and everything is working fine. On the same Windows PC, if I open VLC Media Player, and paste this URL : rtsp ://username:password@localipaddress:554/profile1
It works fine.

  


  I have also a "Raspberry Pi 4 model B 4 GB RAM", which is connected to the same router. If I open VLC Media Player, and I paste the same URL, it doesn't work. I also created an ffmpeg one-liner, which would take a photo, but that is also not working.

  


  My final goal would be to be able to take photos with that ffmpeg one-liner, on the Raspberry Pi.

  


  Maybe the Raspberry Pi is not powerful enough to handle the stream ? Or, could it be the problem that the IP-camera is sending H-264 / H-265 video stream, and the Raspberry Pi cannot handle it ?

  


  Thank you for your help. Any idea could help me.

  


• HEVC/H.265 interlaced format support in ffmpeg or VLC

  30 décembre 2020, par Ernestas Gruodis

  "Music Box Russia" channel over satellite transmits in HEVC 1920x1080 25fps interlaced - and after recording VLC recognizes file as 50 fps, and resolution 1920x540 - half a height. But on satellite tuner the player works fine - it plays a file as 1920x1080 25fps... When we can expect support for HEVC/H.265 interlaced ? Here is recorded file (Garry Grey & Eva Miller - wtf). Also - a lot of lost frames in VLC player statistics..

  


  EDIT :

  


  I found some interesting info how in HEVC the interlace video content can be indicated here :

  


  


  Unlike to H.264/AVC, interlace-dedicated coding in HEVC is not exist :

  


  

  • No mixed frame-field interaction (like PAFF in H.264/AVC)

  


  • No interlace scanning of transform coefficients

  


  • No correction MVX[1] (or y-component of MV) if current and reference pictures are in different polarity (top-bottom or
bottom-top).

  


  


  However, in HEVC the interlace video content can be indicated
(signaled in VPS/SPS and pic_timing SEI messages the latter are
transmitted for every picture in the sequence). Interlace-related
setting :

  


  


  • in VPS/SPS set general_interlaced_source_flag=1 and general_progressive_source_flag=0. Indeed, the HEVC standard says :

    


    if general_progressive_source_flag is equal to 0 and
general_interlaced_source_flag is equal to 1, the source scan type of
the pictures in the CVS should be interpreted as interlaced only.

    


  


  • in VPS/SPS set general_frame_only_constraint_flag=0

    


  


  • in SPS VUI set field_seq_flag=1 and frame_field_info_present_flag=1. Notice that if these flags are ON
then picture timing SEIs shall be present for each picture.

    


  


  • transmission of Picture Timing SEI per picture with the following parameters :

    


    source_scan_type = 0 to indicate interlace mode
for top field picture signal pict_struct=1 and for bottom field picture pict_struct=2

    


  


  


  


  Perhaps it is possible to pass these parameters to ffmpeg/vlc before playing a file ?

  


• FFmpeg still running but don't render HLS file in WPF application [closed]

  22 octobre 2020, par anhpt233

  I had apply ffmpeg to my wpf app with C# for live streaming and split it for upload to the server. But I has a problem with this command. It's will stop render hls file after more than 30m. And when I check process in task manager, ffmpeg.exe still running with 0% CPU and memory.

  


  I had change "preset" to "ultrafast" and config "rtbufsize" is 100M, but it's can't resolve this problem.

  


  I think maybe the client was out-of-memory, not sure. But I don't know how optimal or fix this issue. Anybody can help me ? Thanks so much !

  


  Here is my code :

  


  ffmpeg -f dshow -framerate 30 -i video="Logitech HD Webcam C270":audio="Microphone (HD Webcam C270)" -y - rtbufsize 100M - f gdigrab - framerate 30 - probesize 10M - draw_mouse 1 - i desktop -filter_complex  "nullsrc = size = 1440*480 [base];[0:v]setpts = PTS - STARTPTS ,scale = 720*480 [upperleft] ; [1:v]setpts = PTS - STARTPTS,scale = 720*480 [upperright];[base][upperleft]overlay = shortest = 1:x = 0:y = 0[tmp1];[tmp1][upperright]overlay = shortest = 1:x = 720:y = 0" -c:v libx264 -crf 23 -force_key_frames "expr: gte(t, n_forced * 2)" -preset veryfast -tune zerolatency -pix_fmt yuv422p -f hls -hls_time 4 -hls_playlist_type vod -start_number 0 -hls_segment_filename index%d.ts 480p.m3u8