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Médias (91)
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Valkaama DVD Cover Outside
4 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Image
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Valkaama DVD Label
4 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Image
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Valkaama DVD Cover Inside
4 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Image
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1,000,000
27 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Demon Seed
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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The Four of Us are Dying
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Sur d’autres sites (5963)
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Send 2 different feeds to ffserver from ffmpeg
30 avril 2015, par Niklas Tampier HolmgrenI’m currently working in a project where I have to stream 2 webcams streams from a computer to another through a TCP connection, I can stream 1 without problem :
using
ffserver.conf :
HTTPPort 8090
HTTPBindAddress 0.0.0.0
MaxClients 40
MaxBandwidth 30000
CustomLog -
NoDaemon
<stream>
Format status
ACL allow localhost
ACL allow 192.168.0.0 192.168.255.255
</stream>
#feed for camera 1
<feed>
File /tmp/webcam1.ffm
FileMaxSize 100M
</feed>
#feed for camera 2
<feed>
File /tmp/webcam2.ffm
FileMaxSize 100M
</feed>
#stream for feed 1
<stream>
Feed webcam1.ffm
Format mjpeg
VideoSize 1280x720
VideoFrameRate 30
Preroll 0
NoAudio
Strict -1
</stream>
#stream for feed2
<stream>
Feed webcam2.ffm
Format mjpeg
VideoSize 1280x720
VideoFrameRate 30
Preroll 0
NoAudio
Strict -1
</stream>command to run ffserver :
ffserver /etc/ffserver.conf
command to feed ffserver :
ffmpeg -v 2 -r 20 -f video4linux2 -i /dev/video0 http://localhost/webcam1.ffm
and it works perfect, but when I try to run the other feed :
ffmpeg -v 2 -r 20 -f video4linux2 -i /dev/video1 http://localhost/webcam2.ffm
I can see just the second stream and the first one do not work anymore.
some idea ? -
Arecord->FFMPEG works but FFMPEG w/ ALSA stutters ?
7 février 2017, par user2989813I am trying to stream audio from my Pi Zero and my I2s MEMS mic. I would like to stream using FFMPEG and ALSA (which I have already compiled) but I’m running into stuttering issues.
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FFMPEG + ALSA
~/special/ffmpeg/ffmpeg -report -f alsa -ar 48000 -ac 2 -acodec pcm_s32le -i mic_sv -f lavfi -i testsrc -c:v h264_omx -c:a aac -ab 32k -bufsize 32k -f flv rtmp://209.85.230.23/live2/KEY
This results in constant stuttering and choppiness.
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Arecord piped directly to FFMPEG
arecord -Dmic_sv -c2 -r48000 -fS32_LE | ~/special/ffmpeg/ffmpeg -report -acodec pcm_s32le -i - -f lavfi -i testsrc -c:v h264_omx -acodec aac -ab 32k -bufsize 32k -f flv rtmp://209.85.230.23/live2/KEY
This results in a coherent audio stream, but with skipping every 5 seconds or so.
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Arecord recorded to a wav file, piped into FFMPEG
arecord -Dmic_sv -c2 -r48000 -fS32_LE -twav temp.v &
~/special/ffmpeg/ffmpeg -report -re -i temp.v -f lavfi -i testsrc -c:v h264_omx -ac 2 -acodec aac -ab 32k -bufsize 32k -async 2 -f flv rtmp://209.85.230.23/live2/KEY
This results in a perfect audio stream.
I don’t know why #3 works but #2 and #1 cause problems. Any suggestions ?
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Ffmpeg cpp libav randomly uses high cpu and less gpu or uses high gpu and less cpu with hw accel
29 avril 2024, par cngkytI am using ffmpeg as library with cpp
the integration of library is perfectly done i am using AVFilterGraph as audio resampler and video pixfmt converter.


I cannot share code because it is a complete library and contains too many files but i can assure there is no problem about code but maybe approach.


My whole class is based on the transcode example of ffmpeg
text


The problem is when i run my program that encodes approx 90 streams


it starts with 25% cpu usage 80% gpu encode usage %85 gpu decode usage with 100% sm utilization


or


it starts with 80% cpu usage 45% gpu encode usage 50% gpu decode usage with 60% sm utilization


when it start like second type of utilization videos are perfect
but when it starts like the first type of utilization videos are freezing


my program uses pure gpu for encoding for all streams but using gpu decoding for every 3 cpu deoding
that means i use hwaccel for 1/3 of streams
because my cards are 4070 ti super and they have 2 NVENC 1 NVDEC chips


my program takes udp streams and encode it and outputs udp mpegts


bitrate and quality settings are persistent across streams depending on resolution


i always test on same streams


the problem happens randomly
but if it starts with high cpu and low gpu utilization it goes on like this
when i restart program problem occurs randomly again


what can couse this


just as an info i have experience on c++ more than 25 years


if there is someone who can teach me something i will be happy


thanks for your further helps


i have tried to reproduce it with compiled ffmpeg instead of my libav library usage
same thing happens but not often


i have tried using hevc_cuvid instead of hwacceleration with avcodec_find_decoder_by_name function