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• How to add day suffix[st,nd,rd,th] in timestamp's date in ffmpeg command ? [duplicate]

  16 décembre 2019, par Milan Tejani

  This question already has an answer here :

  • How do you format the day of the month to say “11th”, “21st” or “23rd” (ordinal indicator) ?
    
    18 answers
    

  I am using this command to add time stamp in video :

  ffmpeg -y -i input.mp4 -vf "drawtext=fontfile=roboto.ttf:fontsize=36:fontcolor=yellow:text='%{pts\:gmtime\:1575526882\:%d %b, %Y %I\\\:%M %p}'" -preset ultrafast -f mp4 output.mp4

  this command generate date & time : 05 Dec, 2019 06:21 AM

  but i want to add day suffix after day in date like this : 05th Dec, 2019 06:21 AM

  //like 1st,2nd,3rd,4th,5th.... etc

  what changes i have to do to achieve this ?

• Obtaining frames from IP Camera with low latency

  5 février 2023, par Russ1337

  I am currently using this command to get frames from my RTSP stream and reading frames from stdout :

  


  ffmpeg -nostdin -rtsp_transport tcp -i  -pix_fmt bgr24 -an -vcodec rawvideo -f rawvideo -


  


  However, I would like to get the same latency as when I see it via ffplay :

  


  ffplay -fflags nobuffer -flags low_delay -tune zerolatency -framedrop -rtsp_transport tcp 


  


  or when I play it via VLC Media > Open Network Stream with :network_caching=300ms.

  


  I would like to know what other parameters I can use with my ffmpeg command to get an equivalent (or better) result compared to the ffplay command.

  


  I have made references from : How to dump raw RTSP stream to file ?, Open CV RTSP camera buffer lag, How to pipe output from ffmpeg using python ?, bad ffmpeg performace compared to ffplay and VLC, How to minimize the delay in a live streaming with ffmpeg

  


  My current implmentation :

  


  FFMPEG_CMD = "ffmpeg -nostdin -rtsp_transport tcp -i  -pix_fmt bgr24 -an -vcodec rawvideo -f rawvideo -".split(" ")&#xA;WIDTH = 2560&#xA;HEIGHT = 1440&#xA;&#xA;process = subprocess.Popen(FFMPEG_CMD, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL)&#xA;&#xA;while True:&#xA;    raw_frame = process.stdout.read(WIDTH*HEIGHT*3)&#xA;    frame = np.frombuffer(raw_frame, np.uint8) &#xA;    frame = frame.reshape((HEIGHT, WIDTH, 3))&#xA;&#xA;    <do stuff="stuff" with="with" frame="frame"></do> show frame etc.>&#xA;

  


  Thanks for reading.

  


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  ffmpeg command I am now using for < 1s latency.

  &#xA;

  ffmpeg -nostdin -flags low_delay -rtsp_transport tcp -i  -pix_fmt bgr24 -an -vcodec rawvideo -f rawvideo -


  &#xA;

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  Implementation with suggestion(s) from Answers :

  &#xA;

  import subprocess&#xA;import numpy as np&#xA;&#xA;FFMPEG_CMD = "ffmpeg -nostdin -flags low_delay -rtsp_transport tcp -i  -pix_fmt bgr24 -an -vcodec rawvideo -f rawvideo -".split(" ")&#xA;WIDTH = 2560&#xA;HEIGHT = 1440&#xA;&#xA;process = subprocess.Popen(FFMPEG_CMD, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL)&#xA;&#xA;raw_frame = np.empty((HEIGHT, WIDTH, 3), np.uint8) &#xA;frame_bytes = memoryview(raw_frame).cast("B")&#xA;&#xA;while process.poll() is None:&#xA;    process.stdout.readinto(frame_bytes)&#xA;    frame = raw_frame.reshape((HEIGHT, WIDTH, 3))&#xA;&#xA;    <do stuff="stuff" with="with" frame="frame"></do> show frame etc.>&#xA;

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• Anomalie #816 : nettoyer les fichiers de langue

  18 mai 2011, par guytarr °

  Langonet ne peut pas faire tout le boulot, aussi je propose de continuer ce ticket avec les codes de langues qui ne sont pas forcément manquants mais amène à se poser des questions. Je propose de fermer #2083 et de continuer par ici. Quelques codes de langue qui posent questions¶ ’mots_clef’ et (...)