社科院调研：2018年经济增速预计6.7%
78 questions
2
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1
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2k
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Can I inject subtitles into a live stream with FFmpeg?
In my live streaming scenario I need to grab a video source and inject subtitles that I generate algorithmically during the stream (i.e. I do not know the subtitles upfront), and publish the streams ...
CommunityBot
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0
votes
1
answer
454
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resend headers NUT formats
If I do this
ffmpeg -f dshow -video_size 720x480 -framerate 29.97 -i video="Roxio Video Capture USB":audio="Line (Roxio Video Capture USB)" -c:v mjpeg -c:a pcm_s16le -map 0:v -map 0:a -f fifo -...
CommunityBot
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2
votes
1
answer
4k
views
best way to publish low latency video on ffmpeg
I am trying to publish a stream of live video that need to get to the client side in under 3 sec in latency.
I am using vMix to capture a 720p/50 stream from a camera, that by virtual camera letting ...
CommunityBot
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1
vote
2
answers
82
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Is this a problem in my command, the stream, or FFMPEG itself?
I am not sure if this is the correct Stack Exchange site for this question. I originally posted it on Stackoverflow, but looks like it will be closed there as "off-topic".
I am trying to ...
CommunityBot
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3
votes
1
answer
1k
views
Switching between multiple m3u8 playlist
In a live stream setup, I have 2 cameras and each one sends RTMP stream to one different application which is on my Nginx-RTMP server. On the browser I am using Videojs Hls plugin.
Now my question ...
CommunityBot
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0
votes
1
answer
464
views
What video container formats are similar to MPEG-TS?
I have been looking to live video streaming where a client can join the stream of bytes and play the video automatically. I have recently found MPEG-TS which seems to work pretty well, and I noticed ...
CommunityBot
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0
votes
1
answer
136
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Pink and green color on overlay logo
I ran into such a problem with hls streaming, adding filters to the overlay logo, but it was smeared with pink and green stripes. Has anyone come across this.
ffmpeg -f concat -safe 0 -re -i <(for ...
CommunityBot
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2
votes
1
answer
4k
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ffmpeg rtsp over http not working
I put this conf on ffserver
HTTPPort 1234
RTSPPort 1235
<Stream live.h264>
Format rtp
Feed feed1.ffm
VideoCodec libx264
VideoFrameRate 24
VideoBitRate 100
VideoSize 480x272
AVOptionVideo flags ...
CommunityBot
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1
vote
1
answer
128
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Webpage as a stream overlay using ffmpeg
Probably this is a dumb question but I haven't found anything talking about a way to display as overlay an active webpage.
I use to stream volleyball match using rtmp from my mobilephone to ossrs ...
CommunityBot
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0
votes
1
answer
174
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Generate HLS streams from pre-encoded videos without re-encoding using ffmpeg
I have three videos: low.mp4, mid.mp4 and high.mp4, all of which were generated from the same source file using ffmpeg with the following command:
ffmpeg -y -i source.mp4 -c:v libx264 -crf SOMEVALUE -...
CommunityBot
- 1
0
votes
1
answer
890
views
ffmpeg dash output for multiple resolutions to be in the same mpd file
I am using ffmpeg to convert an input stream into multiple resolutions and creating an mpd for each resolution.
So far, so good.
But I am trying to find a way to create a single mpd for all ...
CommunityBot
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0
votes
1
answer
337
views
Serving static video content directly vs. via adaptive streaming protocols (HLS, DASH)
Is there an advantage of serving static video content (not a live stream) via adaptive streaming protocols such as HLS or DASH over serving them directly as files using HTTP server in terms of speed?
...
CommunityBot
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0
votes
0
answers
34
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How to modify video framing while encoding at runtime?
I'm developing a webapp to direct volleyball matches from the gym taking score, scouting and live stream integrating all these features in a single panel rendered on a mobile phone screen.
My issue is ...
1
vote
1
answer
886
views
FFMPEG: FIFO buffer to smoothen bandwidth requirements?
I'm trying to achieve something pretty simple, but it's very hard to describe:
There is a live video stream which uses h264 for it's video, and m4a for it's audio. This stream is not mine, and I have ...
CommunityBot
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1
vote
0
answers
95
views
Green screen on RTSP stream from USB camera using mediamtx (ffmpeg)
I need to cast a stream from a USB camera via RTSP as stable as possible (at any moment i need to be able to get a static picture on a remote host, reflecting the real state of affairs in front of the ...
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