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If you have a drone codec installed on your PC, I hope this blog post can help you.
Question
I want to be able to re-stream an AR Drone 2 video stream from a Debian server to Flash.
I’ve been told that the AR drone is using my p264 codec. I’m completely new to video codecs, so I don’t know what works best for the purpose I want to achieve?
I was able to stream video from the AR drone, but with very high latency and very low quality compared to connecting directly to the main AR drone using ffplay.
Feedfeed1.ffmswf formatVideo frame rate 30VideoIntraOnlySoundless FILE /tmp/feed1.ffmMaximum file size 17 KBPermission ACL 127.0.0.1Soundless The command I use to get input on the streaming server is:
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ffmpeg -i do http://192.168.1.1:5555 http://localhost:8090/feed1.ffmHow can I reduce latency and increase resolution if the stream is definitely not visible?
Solutions
Unfortunately, ffserver just doesn’t do the job you want it to do. They abstainFace the same wall because everyone is on the Internet. The best I can get can be described as a delay of around 3 seconds, slowly and gradually increasing to around 5-10 seconds after the thread has been running for hours.
My stream is also not decoded with ffmpeg. I don’t understand or don’t know why. it works with ffplay, which confuses me even more!
I’m looking at Py-Media to see when I can just write the runtime code for a similar project. I also want to stream videos that minimize images in most streams.
ps look at gstreamer, I’ve seen a lot of discussions about this with different results.
Get answers to his basic questions and simply share your knowledge.
The OpenCV2 platform is used to decode, serve and consume drone video.Image analysis. If you are using this API to work with the drone video function, this method is too pretty.join us often. However, it is useful to have some theoryBasic knowledge:
Video stream with Parrot AR.Drone 2.0 encoded in H.264 or MPEG4 (more precisely:MPEG4.10 or MPEG4.2).
Both codecs work with “I-frames”, also called “keyframes”, which preserve the integrityImage information comparable to a photograph or image, and the “P-frames” that store itDifference from the new previous image. I-frames are followed by a large number of P-frames.
The P-frame often references and stores the previous metal frame (I-frame or P-frame).Only information that differs from this previous metal frame. It may be useful to consider Instead, video stream decoding is complex and requires high CPU usage.This is the case, for example, with slower computers for which it is impractical to decode every frame in real time. it is not very easy to decode every second frame because P-frames are from the last frame. As a result, information will be lost, resulting in an erroneous and distorted image.
A stylized representation of a footage with an I-frame followed by five P-frames
So decode or nothing? Not really, because the PS-Drone also provides a triggerVideo bitrate, the ability to actually decode key frames that are sure to be received strictlyPeriod, but 95% less CPU usage.
If you want to view, for example, color recordings of devices, it is also useful to know that both codecs are already installed.store their information for the reason that progressive 4:2:0 SE. This means that each frame is savedas a grain (rather than two interlaced fields), and therefore pixels are represented by brightnesscolor brightness and color hue. The color goes from red (0) to green (85) to blue.(170) back so you’re (almost) red (255).
In a square no larger than 2 × 2 pixels, each individual pixel has its own illumination value, all but four pixelsdivide the above value by the color. This is because the human eye cannot distinguish colors.connected as well as the difference in brightness. There are also different shades of blue.are not as distinguishable as different shades of green or red, which is why blue is toolightened accurateth codec compression. Are these common procedures for video reductionData flow as well as non-specific limitation of certain drones or PS drones.
The H.264 codec is a relatively new way to equalize and even compress a video stream. vThe drone sends new images for both cameras in 1280×720 and 640×360 pixel files.MPEG4 codec predates H.264; it should have more bandwidth but also less CPU powerfor decoding and is recommended for slow home computers. Drone resolution for MPEG4 streamsis 640×368 pixels, but the extra five lines contain no useful information. Imagescould be clearer, but there is definitely a tendency to “block” if the bitrate type is too low.information about the video stream.
Drone lagging video parameters encoded in H a.264 encoding, video stream at 640×360 pixels.front device. It is advisable to set up a new video codec in advance and correct the situationto run the video feature and not change it while it’s definitely running.
##### Proposed chain of clean-launched drones #####
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