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40
votes
5answers
27k views

Meaningful thumbnails for a Video using FFmpeg

FFmpeg can capture images from videos that can be used as thumbnails to represent the video. Most common ways of doing that are captured in the FFmpeg Wiki. But, I don't want to pick random frames at ...
6
votes
1answer
14k views

ffmpeg open webcam using YUYV but i want MJPEG

I need ffmpeg to open webcam (logitech c910) in MJPEG mode, because the webcam can give ~24 using MJPEG "protocol" and only ~10 fps using the YUYV. Can i choose between them using ffmpeg command line? ...
2
votes
1answer
3k views

Why does encoding a video using the MJPEG codec take longer than MPEG-4?

I am testing the encoding performance (MPEG-4 and MJPEG) of a smart camera. I have written an application in OpenCV/FFMPEG for performing encoding, where the application captures images from the ...
1
vote
1answer
101 views

What is the best way to losslessly compress MJPEG to MP4?

I have a few digital camera movies recorded in MJPEG that are taking a few GB of storage space. I would like to better compress them, but losing as little detail as possible, or none. Since MJPEG ...
1
vote
1answer
71 views

View port 8080 output from own computer

I'm following the tutorial here to learn how to stream video between computers. http://rtcl.kaist.ac.kr/~bkkim/lecture/designlab/DesignLab_RoboCam_Lab6_C.pdf After installing the recommended ...
1
vote
0answers
288 views

ffserver ffmpeg stream mjpeg from webcam Logitech C930e to mjpeg format without re transcoding

I have premium webcam from Logitech (C930e) and this camera support mjpeg built in processing directly in the camera it self. My purpose is to get that stream with ffmpeg and pipe it to ffserver so ...
1
vote
0answers
719 views

FFMPEG capture snapshot image from RTSP IPCamera

Hi I am able to stream video successfully from my IP Camera with VLC using the URL: rtsp://192.168.0.6:554/cam/realmonitor When attempting to use FFMPEG it is failing with the following errors: I ...
1
vote
1answer
583 views

How to make avi (MJPEG codec) by avconv for iphone?

I try to make video from pack of jpg by avconv and open it on iphone. I make avi file using MJPEG by command: avconv -r 10 -i %06d.jpg -r 10 -vcodec mjpeg -qscale 1 out.avi Eveything is ok on my ...
1
vote
0answers
805 views

Having trouble reading a YUV video with mplayer/mencoder

I'm making some experiences with the YUV raw video format. This YUV video I created (with ppmtoy4m from mjpegtools, from a series of screenshots taken at 24 fps) plays OK with Totem, correct rate, ...
0
votes
2answers
1k views

What makes VLC and Google Chome succeed where MPlayer and OpenCV fail?

I have this MJPEG stream. When I open it with VLC or with Chrome, it works perfectly, and in both cases the stream starts instantly (or atleast within one second). However, with MPlayer, I get this ...
0
votes
2answers
5k views

Mjpeg recording with FFMPEG preserving time information

I am recording the MJPEG video from an IP camera and saving it to a file but the problem is that file's duration is way smaller than the actual recording time. Its around 9 seconds video for 2 minutes ...
0
votes
1answer
71 views

Video compression size s and codecs from JPEG

I am building a data logger with 3 cameras which output as jpeg frames (o.79MB/jpeg @24bit/pixel) at 24 frames per second. I want to take these images and convert it to a video. Each For the video I ...
0
votes
0answers
18 views

ffmpeg mjpeg to x264 buffer issue

I'm piping some MJPEG data into ffmpeg in order to turn it into an x264 stream. Here are my arguments: ffmpeg -use_wallclock_as_timestamps 1 -i pipe:0 -strict -2 -movflags empty_moov+...
0
votes
1answer
71 views

How to stream video from IP Camera Planet HM126 to a webpage

Unfortunately, I'm not able to find how I should set up this specific model of Planet IP camera to stream its video somewhere. (Is it even possible?) Finally I'd like to put that stream into my ...
0
votes
1answer
2k views

Fixing an unmuxed image/jpeg stream from webcam using gstreamer

I made a broken footage using the following pipeline: gst-launch-1.0 v4l2src ! filesink location=encode.mjpeg Somehow gstreamer can still play it back: gst-launch-1.0 filesrc location=encode.mjpeg ...
0
votes
1answer
1k views

Extracting jpeg images from mjpeg stream on terminal

I'm trying to extract jpeg images from an mjpeg stream. I've done a search and found a few sources, but those were extracting jpeg images from a mjpeg file, such as this one here. In my case, I don't ...
0
votes
1answer
1k views

Record mjpeg with ffmpeg

I want to record a mjpeg stream via ffmpeg, but as the framerate of the mjpeg is very unreliable the result video is at first to fast and the speed changes. The source i used to test is: http://c-cam....
-1
votes
1answer
33 views

Convert .mp4 video file for playback on camcorder

I have a .mp4 file with MPEG4 for video and MP3 for audio that I need to convert to make my camcorder (a cheap one I got off eBay) play it back, but the only problem is that it doesn't accept anything ...