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FFMPEG : Transcoding

Sergio 2016-03-30 17:57:56 UTC in Nimble Streamer


I'm trying transcoding a live streaming with this code :

/usr/local/bin/ffmpeg -i rtmp:// -vcodec libx264 -preset veryfast -b:v 2000k -maxrate 2000k -bufsize 2000k -s 1280x720 -sws_flags lanczos -r 60 -acodec copy -f flv rtmp://

But it does not work.


Yury Udovichenko 2016-03-31 02:11:31 UTC


Please specify what exactly doesn't work - what behavior do you see.
If it's related to Nimble Streamer, please post your question to

Joël 2016-04-01 10:45:51 UTC

you need rtmp authentication like:

-f flv "rtmp://ip-nimble-server:1935/application?rtmpauth=user:password/stream"

karwan 2016-04-03 23:24:42 UTC

Nimble rtmp authentication


karwan 2016-04-14 20:47:59 UTC

Ubuntu 14.04 should be amended as follows

/usr/local/bin/ffmpeg -i
ffmpeg -i

Andrey 2018-08-13 09:43:50 UTC

I created interface and application with the name "live" login and password also "live"
in ffmpeg rtmp://live:live@ip/live
I get [rtmp @ 0x561816633140] Can not read RTMP handshake response
If I try to use srt then
[srt @ 0x55c5c96b0540] Connection setup failure: connection time out.
srt: // 1234: Unknown error occurred
11: 58: 41.143066 / SRT: RcvQ: worker !! FATAL !!: SRT.c: CChannel reported ERROR DURING TRANSMISSION - IPE. INTERRUPTING worker anyway.

Max 2018-08-13 12:17:50 UTC

Hello Andrey,

Are you trying to pull or push RTMP stream? What is the full command you're trying to use?

Andrey 2018-08-13 12:36:46 UTC

coder push to nimble
if push mpegts udp there are problems with delays. Coder and Nimble are located in different cities

coder ubuntu
ffmpeg -y -re -i $FILE_INPUT -map 0:v -c:v:0 $VCODEC -vf:v:0 bwdif=0 -r:v:0 25 -maxrate:v:0 300k -bufsize: v:0 300k -b:v:0 300k -s:v:0 640x480 -profile:v:0 main -map 0:v -c:v:1 $VCODEC -vf:v:1 bwdif=0 -r:v:1 25 -maxrate:v:1 600k -bufsize: v:1 600k -b:v:1 600k -s:v:1 1024x768 -profile:v:1 main -map 0:a -c:a:0 $ACODEC -b:a:0 64k -f flv "rtmp://live:live@nimble_ip/live"

In nimble created interface and application with rtmp and name "live" login and password also "live"

Max 2018-08-13 12:39:13 UTC

Try to push it without authentication enabled, will it work?

I'd also suggest to try pushing with URL authentication like it described in article.

Andrey 2018-08-13 13:35:55 UTC

in coder
[rtmp @ 0x55745b76bac0] Cannot read RTMP handshake response
rtmp://nimble_ip/live?rtmpauth=live:live/stream: Connection reset by peer

without authentication
Global setting Nimble clear login and password and clear login and password in application "live"

[rtmp @ 0x56021f8c00c0] Cannot read RTMP handshake response
rtmp://nimble_ip/live: Connection reset by peer

Max 2018-08-13 13:37:18 UTC

Please check nimble.log on the server, are there any errors?

Andrey 2018-08-13 13:52:55 UTC


Max 2018-08-14 02:46:07 UTC

Hello Andrey,

Please file a support ticket via form and provide us publish point URL so we could check what is going wrong in your case.

Thank you.

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