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• Using ffmpeg to "re-time" an RTSP stream ?

  29 mars 2021, par Tom S

  I recently set up a birdbox in my garden, and have been using a cheapie camera that I bought, along with ffmpeg on a raspberry pi to stream from the camera to YouTube.

  


  But YouTube keeps telling me that I am sending data too fast - multiple seconds of video per second, and at that point the stream seems to stall and I just get a buffering spinner on YouTube and have to restart ffmpeg to restore the stream.

  


  This is happening very frequently, infact even more frequently now than when I originally got everything up and running for some reason... So much so that Ive had to setup ffmpeg to run as a service, and restart it once an hour via cron. But even this is not enough and now it seems that it can go bonkers within 10-15 minutes of a restart - almost like the more often I restart the quicker it gets...

  


  I dont know where the issue is, or how to find it (does ffmpeg simply restream "verbatim" what ever the camera supplies ?), but I wonder if it might be possible to have ffmpeg re-time the stream so that I only send to YouTube the 25fps that it is happy with (i.e. dropping any frames in excess of this) ?

  


  I have key frames set to 1 second on the camera.

  


  Thanks !

  


  ---

  


  Here is my service file which contains the command that I use to start ffmpeg :

  


  [Unit]
Description=BirbCam 1 streaming service
After=network.target
StartLimitIntervalSec=0

[Service]
Type=simple
Restart=always
RestartSec=1
User=root
# Uncomment one ExecStart line below, then run `sudo systemctl daemon-reload` before restart
# With audio
ExecStart=/usr/local/bin/ffmpeg -rtsp_transport tcp -i rtsp://172.25.144.35:554/user=admin&password=&channel=1&stream=0.sdp?real_stream -tune zerolatency -vcodec libx264 -pix_fmt + -c:v copy -c:a aac -strict experimental -f flv rtmp://a.rtmp.youtube.com/live2/xxxx-xxxx-xxxx-xxxx-xxxx

# Without audio
# ExecStart=/usr/local/bin/ffmpeg -f lavfi -i anullsrc -rtsp_transport tcp -i rtsp://172.25.144.35:554/user=admin&password=&channel=1&stream=0.sdp?real_stream -tune zerolatency -vcodec libx264 -pix_fmt + -c:v copy -c:a aac -strict experimental -f flv rtmp://a.rtmp.youtube.com/live2/xxxx-xxxx-xxxx-xxxx-xxxx

[Install]
WantedBy=multi-user.target


  


• FFMPEG, how to get rid of "broken pixels" in videos ?

  5 avril 2021, par Sergi Fernàndez

  I'm using the following command to trim the video and reduce it's size, while keeping the visual quality :

  


  ffmpeg -hwaccel cuda -y -hide_banner -ss 00:02:45.2000000 -i .\video\410.mkv -t 00:20:29.3090000 -map 0:v -c:v hevc_nvenc -preset slow -map 0:a -codec:a aac -x265-params crf=16 -metadata:s:v:0 title=1080p -metadata:s:v:0 language=ja -metadata:s:a:0 title=Japanese -metadata:s:a:0 language=ja -tune zerolatency .\processing\410.mkv

  


  It's been working pretty good, it gets encoded fast and it looks exactly as the input video, but at certain moments you can find this kind of problems with the pixels :

  


  

  


  If I open the video with Windows Media Player, VLC, Photos app, etc... they all show the video with this pixel issue. However, if i open the damaged video using Wondershare Filmora, you can't see that issue at all, and it looks just as the original video. This is how it looks like in Wondershare Filmora :

  


  

  


  How can that be possible ? Any way to fix this for all video players ? If possible I would like to avoid CPU encoding, as it takes more than 2 days to encode a single video... Thanks !

  


• Error with FFMPEG "av_interleaved_write_frame() broken pipe" While streaming in loop

  16 juin 2021, par Prateek Kalra

  Good Evening to all,

  


  Please help i am having some issue with my ffmpeg

  


      #! /bin/bash

VBR="1500k"
FPS="30"
QUAL="fast"

KEY="keyhere"


ffmpeg -re -stream_loop -1 -i /home/play/night.mp4 -deinterlace -c:v libx264 -b:v 2M -c:a copy -strict -2 -flags +global_header -bsf:a aac_adtstoasc -bufsize 2100k -f flv rtmp://a.rtmp.you$KEY


  


  My issue is that first time steam work fine to YouTube but when video enters loop it ends with error

  


  av_interleaved_write_frame(): Broken pipeB time=00:15:23.02 bitrate=1592.9kbits/s speed=0.959x
    Last message repeated 1 times
[flv @ 0x873b40] Failed to update header with correct duration.
[flv @ 0x873b40] Failed to update header with correct filesize.


  


  Please advice

  


  Thank you so Much