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Sur d’autres sites (9544)

  • Continuous YouTube live stream via ffmpeg keeps failing after a while [closed]

    23 octobre 2024, par dooleyo

    I am trying to stream a simple MP4 file as a 24/7 YouTube radio station on repeat from a virtual machine using ffmpeg. It's only a 23 minute ( 1GB) file, and runs fine for hours or even days, then hangs up. I've tried on a small Digital Ocean droplet and detaching the ssh session with screen. I am using -c copy so I don't need to process or re-encode anything (even on the smallest droplet, the memory/cpu utilization is negligible, so I know that's not the issue). I have even tried some of ffmpeg's auto-restart options to no avail. Here is the command I'm currently running :

    


    ffmpeg -stream_loop -1 -re -i file.mp4 -c copy -drop_pkts_on_overflow 1 -attempt_recovery 1 -recover_any_error 1 -recovery_wait_time 1 -f flv "rtmp://x.rtmp.youtube.com/live2/{STREAM_KEY}"

    


    This works perfectly, for a time, then hangs up with :

    


    aost#0:1/copy @ 0x623b201c5fc0] Error submitting a packet to the muxer: Broken pipe                                                          
[out#0/flv @ 0x623b201a1780] Error muxing a packet
[flv @ 0x623b201c3940] Failed to update header with correct duration.
[flv @ 0x623b201c3940] Failed to update header with correct filesize.
[out#0/flv @ 0x623b201a1780] Error writing trailer: Broken pipe
[out#0/flv @ 0x623b201a1780] Error closing file: Broken pipe
[out#0/flv @ 0x623b201a1780] video:9310695kB audio:571706kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.153029%
size= 9897524kB time=03:24:40.66 bitrate=6602.3kbits/s speed=   1x


    


    There are not many articles I've found covering the broken pipe issue, but those that do seem to involve either A) streams that won't start, or B) streams where the broken pipe occurs the first time the input tries to loop (neither of which are my problem, since it streams and loops fine for quite a while).

    


    Thanks in advance !

    


  • Comparing PSNR of two videos, possibly with ffmpeg ?

    24 septembre 2020, par UnixNerd

    I would like to compare a large number of videos to a good reference video in order to find videos with poor quality. I want to do this in a batch mode by calling a command line utility, I'm already using ffmpeg in this manner to grab video frames.

    



    ffmpg will give me a PSNR value to compare the input and output videos if I transcode a video. I was under the impression I could use something like this to compare two separate videos but can't find a way to do it.

    



    Would I be better grabbing a single frame from each video and comparing those somehow ? PSNR may not be the best option for me ?

    



    I'm not looking for minor differences in quality but for major differences such a sync problems or large amounts of snow.

    



    Any suggestions ? Thanks in advance :-)

    


  • Comparing PSNR of two videos, possibly with ffmpeg ?

    22 décembre 2016, par UnixNerd

    I would like to compare a large number of videos to a good reference video in order to find videos with poor quality. I want to do this in a batch mode by calling a command line utility, I’m already using ffmpeg in this manner to grab video frames.

    ffmpg will give me a PSNR value to compare the input and output videos if I transcode a video. I was under the impression I could use something like this to compare two separate videos but can’t find a way to do it.

    Would I be better grabbing a single frame from each video and comparing those somehow ? PSNR may not be the best option for me ?

    I’m not looking for minor differences in quality but for major differences such a sync problems or large amounts of snow.

    Any suggestions ? Thanks in advance :-)

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