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• how to scale video using ffmpeg with -filter_complex

  7 juillet 2020, par JuraganFilm

  im trying to encode my video with watermark and subtitles , i and i have this codes that work for watermark and subtitles

  


  ffmpeg -hide_banner -i $video -i $TITLE.ass -loop 1 -i $WATERMARK -loop 1 -i $LOGO -filter_complex "[${videomap}]drawtext=text='${TEXT}':fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf:y=h-line_h-100:x=w-(t-${MARQUE})*w/15:y='10':enable='lt(mod(t\,1000)\,100)':fontcolor=orange:fontsize=${FONT}:shadowx=${SHADOWX}:shadowy=${SHADOWY},ass=$TITLE.ass[FID1];[FID1][2:v]overlay=10:${WATERMARKPOSITION}:repeatlast=0:enable='between(t,300,600)'[FID3];[3:v]fade=in:st=1200:d=1.6:alpha=1,fade=out:st=107998:d=1.6:alpha=1[FID6];[FID3][FID6]overlay=10:5:repeatlast=0:enable='between(t,1200,187922)'" -c:v libx264 -x264-params "no-deblock=0:ref=2:weightp=2:chroma_qp_offset=0:keyint=50:keyint_min=5:bframes=3:b_pyramid=1:b-adapt=2:subme=7:b_bias=0:direct=1:weightb=1:open_gop=0:scenecut=40::threads=7:lookahead_threads=1" -b:v 500k -minrate 500k -maxrate 600k -bufsize 1200k -pix_fmt yuv420p -preset ultrafast -profile:v baseline -level:v 3.0 -c:a copy -vf "scale=trunc(oh*a/2)*2:480:flags=bicubic" -use_editlist 0 -movflags faststart -metadata title="${INFOVID} - Visit us @ ${WEBSITE}" -strict -2 -f mp4 -y "${output}/$TITLE-480p.mp4"


  


  and now im trying to scale the video to 480p quality , i've tried using

  


  -vf "scale=trunc(oh*a/2)*2:480"


  


  and also add :flags=bicubic but still i got error .

  


  how to scale video with -filter_complex from those code above ?

  


  thank you before !

  


• Live Streaming WebM with Wowza Server

  2 décembre 2010, par noreply@blogger.com (John Luther)

  Guest blogger Charlie Good is CTO and co-founder of Wowza Media Systems

  As a company, we at Wowza move fast and like to tinker. When WebM was announced in May, we saw it as a promising new approach to HTML5 video and decided to do an experiment with live WebM streaming over http.

  Adding WebM VP8 video and Vorbis audio to the other encoding formats that our server supported was easy (we designed the Wowza server to be codec-agnostic). We then created a WebMfile and implemented WebM HTTP streaming.

  We originally created the demo as a proof-of-concept for the IBC show in September, 2010 but have made it available to watch on our web site.

  The file is streamed live (more precisely, "pseudo-live") over http using the Wowza server-side publishing API (PDF). The result is very impressive ; playback starts fast and the VP8 image quality is fantastic.

  You will need a WebM-enabled browser or VLC media player 1.1.5 to view the live stream.

  If you’re interested in keeping up with Wowza’s WebM progress, visit Wowza Labs or drop us a note at info@wowzamedia.com.

  

• Cannot open connection tcp ://localhost:1935 when to set up custom RTMP stream

  8 janvier 2021, par showkey

  My simple network is as following :

  


  192.168.31.52 is my local pc 
192.168.31.251 is an ip camera.


  


  I can open the stream rtsp://192.168.31.251/cam/realmonitor?channel=1&subtype=0 with SMPlayer.
  
Build my nginx for customizing RTMP stream this way.

  


  sudo apt update
sudo apt install build-essential git
sudo apt install libpcre3-dev libssl-dev zlib1g-dev 
git clone https://github.com/arut/nginx-rtmp-module.git
git clone https://github.com/nginx/nginx.git
cd nginx
./auto/configure --add-module=../nginx-rtmp-module
make
sudo make install


  


  Set config file for nginx :

  


  sudo vim /usr/local/nginx/conf/nginx.conf
rtmp { 
    server { 
        listen 1935; 
        application live { 
            live on; 
            interleave on;
 
            hls on; 
            hls_path /tmp/hls; 
            hls_fragment 15s; 
        } 
    } 
} 


  


  Then set permission for nginx :

  


  mkdir /tmp/hls
sudo chmod -R 755  /tmp/hls
sudo chown -R www-data:www-data  /tmp/hls


  


  Edit index.html in /tmp/hls.

  


  <p>test for nginx</p>&#xA;

  


  Both 127.0.0.1/index.html and 192.168.31.52/index.html can open the /tmp/hls/index.html.

  


  Now open port 1935 on my network :

  


  sudo firewall-cmd --zone=public --add-port=1935/tcp --permanent
sudo firewall-cmd --reload 
sudo firewall-cmd --list-ports | grep 1935
1935/tcp


  


  Start nginx :

  


  sudo systemctl start nginx


  


  Up stream the rtsp stream from ip camera—192.168.31.251 to local pc —192.168.31.52.

  


  input="rtsp://192.168.31.251/cam/realmonitor?channel=1&subtype=0"
output="rtmp://192.168.31.52:1935/live/sample"
ffmpeg -i $input -acodec aac -strict experimental -ar 44100 -ac 2 -b:a 96k -r 25 -b:v 500k -s 640*480 -f flv $output


  


  It encounter the following errors :

  


  [tcp @ 0x59fb700] Connection to tcp://192.168.31.52:1935 failed: Connection refused
[rtmp @ 0x59fc5c0] Cannot open connection tcp://192.168.31.52:1935
rtmp://192.168.31.52:1935/live/sample: Connection refused


  


  How can fix it ?