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• FFmpeg : Looping an video/audio stream to YouTube Live

  27 novembre 2020, par Claus

  I'm using this script to stream a 30s .mp4 video file with a 2min audio track in .mp3 format :

  


  #! /bin/bash

VBR="1500k"
FPS="30"
QUAL="ultrafast"
YOUTUBE_URL=" rtmp://a.rtmp.youtube.com/live2"
YOUTUBE_KEY="**********"
VIDEO_SOURCE="test_video_4.mp4"
AUDIO_SOURCE="test_audio_3.mp3"
AUDIO_ENCODER="aac"

ffmpeg \
 -stream_loop -1 \
 -re \
 -i "$VIDEO_SOURCE" \
 -thread_queue_size 512 \
 -i "$AUDIO_SOURCE" \
 -c:v libx264 -preset $QUAL -r $FPS -g $(($FPS *2)) -b:v $VBR \
 -c:a $AUDIO_ENCODER -threads 6 -ar 44100 -b:a 128k -bufsize 512k -pix_fmt yuv420p \
 -fflags +shortest -max_interleave_delta 50000 \
 -f flv $YOUTUBE_URL/$YOUTUBE_KEY


  


  Both the audio and the video get played correctly the first time, with the video looping while the audio playback is completed (since it's shorter). The only problem is that the audio loop does not work and as soon the audio completes the first time the stream simply stops.

  


  Here's the log :

  


  


  ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
  
built with Apple clang version 12.0.0 (clang-1200.0.32.27)
  
configuration : —prefix=/usr/local/Cellar/ffmpeg/4.3.1_4
—enable-shared —enable-pthreads —enable-version3 —enable-avresample —cc=clang —host-cflags= —host-ldflags= —enable-ffplay —enable-gnutls —enable-gpl —enable-libaom —enable-libbluray —enable-libdav1d —enable-libmp3lame —enable-libopus —enable-librav1e —enable-librubberband —enable-libsnappy —enable-libsrt —enable-libtesseract —enable-libtheora —enable-libvidstab —enable-libvorbis —enable-libvpx —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxml2 —enable-libxvid —enable-lzma —enable-libfontconfig —enable-libfreetype —enable-frei0r —enable-libass —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-librtmp —enable-libspeex —enable-libsoxr —enable-videotoolbox —disable-libjack —disable-indev=jack libavutil 56. 51.100 / 56. 51.100 libavcodec 58. 91.100 / 58. 91.100 libavformat 58. 45.100 /
58. 45.100 libavdevice 58. 10.100 / 58. 10.100 libavfilter 7. 85.100 / 7. 85.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 7.100 / 5. 7.100 libswresample 3. 7.100 /
3. 7.100 libpostproc 55. 7.100 / 55. 7.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test_video_4.mp4' : Metadata :
major_brand : mp42
minor_version : 1
compatible_brands : isommp41mp42
creation_time : 2020-11-27T18:38:02.000000Z Duration : 00:00:39.46, start : 0.000000, bitrate : 12081 kb/s
Stream #0:0(und) : Video : h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 12033
kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 48k tbc (default)
Metadata :
creation_time : 2020-11-27T18:38:02.000000Z
handler_name : Core Media Video Input #1, mp3, from 'test_audio_3.mp3' : Metadata :
genre : Cinematic
album : YouTube Audio Library
title : Test Title
artist : Test Artist Duration : 00:02:12.21, start : 0.025057, bitrate : 320 kb/s
Stream #1:0 : Audio : mp3, 44100 Hz, stereo, fltp, 320 kb/s
Metadata :
encoder : LAME3.99r Stream mapping : Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264)) Stream #1:0 -> #0:1 (mp3 (mp3float) -> aac (native)) Press [q] to stop, [?] for help [libx264 @
0x7fa825031600] VBV maxrate unspecified, assuming CBR [libx264 @
0x7fa825031600] using SAR=1/1 [libx264 @ 0x7fa825031600] using cpu
capabilities : MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 [libx264 @
0x7fa825031600] profile Constrained Baseline, level 3.1, 4:2:0, 8-bit
[libx264 @ 0x7fa825031600] 264 - core 161 r3027 4121277 - H.264/MPEG-4
AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html -
options : cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1
psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0
8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0
threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1
interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0
keyint=60 keyint_min=6 scenecut=0 intra_refresh=0 rc_lookahead=0
rc=cbr mbtree=0 bitrate=1500 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69
qpstep=4 vbv_maxrate=1500 vbv_bufsize=512 nal_hrd=none filler=0
ip_ratio=1.40 aq=0 Output #0, flv, to
'rtmp ://a.rtmp.youtube.com/live2/*****' :
  
Metadata :
major_brand : mp42
minor_version : 1
compatible_brands : isommp41mp42
encoder : Lavf58.45.100
Stream #0:0(und) : Video : h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=-1—1, 1500 kb/s,
30 fps, 1k tbn, 30 tbc (default)
Metadata :
creation_time : 2020-11-27T18:38:02.000000Z
handler_name : Core Media Video
encoder : Lavc58.91.100 libx264
Side data :
cpb : bitrate max/min/avg : 0/0/1500000 buffer size : 512000 vbv_delay : N/A
Stream #0:1 : Audio : aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, stereo, fltp, 128 kb/s
Metadata :
encoder : Lavc58.91.100 aac Larger timestamp than 24-bit : 0xffff9b44kB time=00:02:37.43 bitrate=1292.6kbits/s
speed=0.995x [flv @ 0x7fa825032800] Failed to update header with
correct duration. [flv @ 0x7fa825032800] Failed to update header with
correct filesize. frame= 3790 fps= 24 q=-1.0 Lsize= 24962kB
time=00:02:38.03 bitrate=1294.0kbits/s speed=0.997x video:22719kB
audio:2081kB subtitle:0kB other streams:0kB global headers:0kB muxing
overhead : 0.656017% [libx264 @ 0x7fa825031600] frame I:64 Avg
QP:36.43 size : 38436 [libx264 @ 0x7fa825031600] frame P:3726 Avg
QP:28.61 size : 5583 [libx264 @ 0x7fa825031600] mb I I16..4 : 100.0%
0.0% 0.0% [libx264 @ 0x7fa825031600] mb P I16..4 : 3.3% 0.0% 0.0% P16..4 : 13.6% 0.0% 0.0% 0.0% 0.0% skip:83.1% [libx264 @
0x7fa825031600] coded y,uvDC,uvAC intra : 57.8% 71.6% 47.8% inter : 6.0%
7.1% 2.1% [libx264 @ 0x7fa825031600] i16 v,h,dc,p : 21% 39% 23% 18% [libx264 @ 0x7fa825031600] i8c dc,h,v,p : 36% 38% 16% 10% [libx264 @
0x7fa825031600] kb/s:1177.39 [aac @ 0x7fa82502d800] Qavg : 179.328
Exiting normally, received signal 2.

  


  


• How to apply any mask.png on a video with ffmpeg

  18 novembre 2022, par Talha Khalid

  I am adding a 1.mp4 on a video 2.mp4, and i want to add a mask on overlay video(1.mp4)
  

  


  

  


  I want to apply this mask on 1.mp4
  
I'm using chrome key right now

  


      ffmpeg -t 5 -r 30 -f lavfi -i color=c=black:s=640x360
    -i 1.mp4
    -i mask2.png
    -i 2.mp4
    -filter_complex "
    [1:v]scale=500x281[v1];
    [2]scale=500x281[mask];
    [v1][mask]overlay, chromakey=0x00FF00:0.25:0.08 [v2];
    [3:v]scale=640x360[v3];
    [0][v3]overlay [out1];
    [out1][v2]overlay=0:0"
    -y output.mp4


  


  

  


  But it also removes color from videos.
  
I'm not sure but i think it can be done by negate
  
also i don't need audio command, i already done that part
  
Thanks

  


• In spring manage threads created by one controller's different instances

  14 janvier 2014, par lubovbyc

  I have written a controller to deal with video upload. The hard part for me is to convert the video type to both mp4 and webm. I chose to new a thread in my controller and the thread will new a process which is a video convert software called "ffmpeg".

  The problem is that this thread will occupy too much resources(at least 25% CPU usage). So I guess I have to make these threads created by different controller instances execute in a shared queue. It is terrible to have these threads in concurrent execution.

  It seems that the taskExecutor in Spring can only manage threads created by one controller instance. And is there any way to manage threads among threads created by one controller class but different instances ? It seems like a public or shared thread pool..