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Sintel MP4 Surround 5.1 Full
13 mai 2011, par
Mis à jour : Février 2012
Langue : English
Type : Video
Autres articles (69)
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Des sites réalisés avec MediaSPIP
2 mai 2011, parCette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page. -
Configurer la prise en compte des langues
15 novembre 2010, parAccéder à la configuration et ajouter des langues prises en compte
Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...) -
Le profil des utilisateurs
12 avril 2011, parChaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...)
Sur d’autres sites (7865)
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how to play audio files using ffmpeg
6 juin 2012, par user1426122I'm using ffmpeg to make a music player, i want to know the function to play the music and pause the music. The have searched several times about it but it, but didn't find a workable answer.
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FFmpeg missed packets (from time to time) while copying RTP stream to file
1er septembre 2017, par GnitryI have and RTP video broadcast stream (using NOVUS – H.264 / MPEG-4 HD/SD Broadcast Encoder). And I have a Windows Server 2012 (Intel Xeon E5-2690, 128Gb RAM) with service which is recording this stream to file (using lastest FFmpeg, calling it as external process). Every 2-5 minutes recording stops and starts again to a new file.
From time to time there are significant (and not) lags in video. At most these lags are at the beginning file, sometimes in the center/end. Regarding log there are missed packets.
It could be network problems, but :
I ran manually from console in parallel another instance of ffmpeg and started to record the same broadcast stream with segmentation by time. And in this case recording is very good (missed packets 1..5 very very rarely), no lags. At moments, when the first ffmpeg records the second ffmpeg has no problems.
What could be the reason of this behavior ? Two ffmpeg instances run in parallel and read the same udp input, but the first misses packets when the second feels good. No memory problems, no hdd problems, no CPU overload. I also tried to set highest priority of the first ffmpeg process, but it didn’t help. The only difference between them I see is that first ffmpeg is run from service, and the second is run from from local administrator. To be honest, I used vlc as recorder before, but it had the same problems too... And I can surely say that video stream is ok, because it is played in VLC player 24h/day on another PC without lags...
That is how I run ffmpeg from windows service (C#) :
_process = new Process();
var startInfo = new ProcessStartInfo(@"ffmpeg\ffmpeg.exe");
startInfo.UseShellExecute = false;
startInfo.RedirectStandardInput = true;
startInfo.Arguments = "-loglevel debug -y -ss 1 -i \"" + _url + "\" -vcodec copy -y -an \"" + _outputFileName + "\"";
startInfo.CreateNoWindow = true;Command to record video automatically from windows service :
ffmpeg.exe -loglevel debug -y -ss 1 -i "rtp://225.1.1.1:1024" -vcodec copy -y -an "Session-021221.ts"Command to record video manually.
D:\ffmpeg\ffmpeg -i "rtp://225.1.1.1:1024" -vcodec copy -an -f segment -strftime 1 -segment_time 300 "novus-%Y-%m-%d_%H-%M-%S.ts"This is part of the log of one of the broken recordings (some other full logs are attached) :
...
2017.09.01 18R:22:56.171 frame= 172 fps= 45 q=-1.0 size= 2816kB time=00:00:03.45 bitrate=6674.9kbits/s speed=0.909x
2017.09.01 18R:22:56.174 [NULL @ 0000000000a89ee0] ct_type:0 pic_struct:0
2017.09.01 18R:22:56.686 Last message repeated 26 times
2017.09.01 18R:22:56.687 frame= 199 fps= 46 q=-1.0 size= 3072kB time=00:00:03.99 bitrate=6297.7kbits/s speed=0.926x
2017.09.01 18R:23:04.554 [NULL @ 0000000000a89ee0] ct_type:0 pic_struct:0
2017.09.01 18R:23:04.571 Last message repeated 26 times
2017.09.01 18R:23:04.571 frame= 226 fps= 47 q=-1.0 size= 3584kB time=00:00:04.53 bitrate=6472.7kbits/s speed=0.939x
2017.09.01 18R:23:04.571 [NULL @ 0000000000a89ee0] ct_type:0 pic_struct:0
2017.09.01 18R:23:04.572 Last message repeated 26 times
2017.09.01 18R:23:04.572 frame= 253 fps= 47 q=-1.0 size= 4096kB time=00:00:05.07 bitrate=6610.4kbits/s speed=0.948x
2017.09.01 18R:23:04.572 [NULL @ 0000000000a89ee0] ct_type:0 pic_struct:0
2017.09.01 18R:23:04.572 frame= 254 fps= 21 q=-1.0 size= 4096kB time=00:00:05.09 bitrate=6584.5kbits/s speed=0.418x
2017.09.01 18R:23:04.572 [NULL @ 0000000000a89ee0] ct_type:0 pic_struct:0
2017.09.01 18R:23:04.655 Last message repeated 5 times
2017.09.01 18R:23:04.684 [rtp @ 0000000000a3a9a0] max delay reached. need to consume packet
2017.09.01 18R:23:04.684 [rtp @ 0000000000a3a9a0] RTP: missed 4147 packets
2017.09.01 18R:23:04.685 [rtp @ 0000000000a3a9a0] RTP: PT=21: bad cseq a237 expected=9204
2017.09.01 18R:23:04.685 [rtp @ 0000000000a3a9a0] max delay reached. need to consume packet
2017.09.01 18R:23:04.685 [rtp @ 0000000000a3a9a0] RTP: missed 4148 packets
2017.09.01 18R:23:04.685 [rtp @ 0000000000a3a9a0] Continuity check failed for pid 256 expected 8 got 15
2017.09.01 18R:23:04.686 [rtp @ 0000000000a3a9a0] Continuity check failed for pid 272 expected 10 got 15
2017.09.01 18R:23:04.686 [rtp @ 0000000000a3a9a0] Continuity check failed for pid 32 expected 13 got 4
2017.09.01 18R:23:04.686 [rtp @ 0000000000a3a9a0] Continuity check failed for pid 0 expected 14 got 6
2017.09.01 18R:23:04.767 [NULL @ 0000000000a89ee0] ct_type:0 pic_struct:0
2017.09.01 18R:23:05.255 Last message repeated 25 times
2017.09.01 18R:23:05.256 frame= 286 fps= 22 q=-1.0 size= 4608kB time=00:00:12.51 bitrate=3016.0kbits/s speed=0.971x
2017.09.01 18R:23:05.257 [NULL @ 0000000000a89ee0] ct_type:0 pic_struct:0
2017.09.01 18R:23:05.77 Last message repeated 26 times
2017.09.01 18R:23:05.77 frame= 313 fps= 23 q=-1.0 size= 5120kB time=00:00:13.05 bitrate=3212.5kbits/s speed=0.974x
2017.09.01 18R:23:05.773 [NULL @ 0000000000a89ee0] ct_type:0 pic_struct:0
2017.09.01 18R:23:06.287 Last message repeated 26 times
2017.09.01 18R:23:06.288 frame= 340 fps= 24 q=-1.0 size= 5376kB time=00:00:13.59 bitrate=3239.2kbits/s speed=0.977x
2017.09.01 18R:23:06.29 [NULL @ 0000000000a89ee0] ct_type:0 pic_struct:0
2017.09.01 18R:23:06.803 Last message repeated 26 times
2017.09.01 18R:23:06.804 frame= 367 fps= 25 q=-1.0 size= 5888kB time=00:00:14.13 bitrate=3412.2kbits/s speed=0.979x
2017.09.01 18R:23:06.808 [NULL @ 0000000000a89ee0] ct_type:0 pic_struct:0
2017.09.01 18R:23:07.324 Last message repeated 26 times
2017.09.01 18R:23:07.324 frame= 394 fps= 26 q=-1.0 size= 6144kB time=00:00:14.67 bitrate=3429.5kbits/s speed=0.981x
...Some full logs :
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OpenCV FFMPEG RTSP Camera Feed Errors
4 avril, par trn2020I'm getting these errors at random times when saving frames from an rtsp camera feed. The errors happen at different times, usually after 100-200 images have been saved, and the errors themselves are not always exactly the same. They cause the images that are saved at the time of the error to be distorted either to the point of being completely grey or contain distorted pixels.


#Frame_142 - [hevc @ 0c3bf800] The cu_qp_delta 29 is outside the valid range [-26, 25].

#Frame_406 - [hevc @ 0b6bdb80] Could not find ref with POC 41

I've tried implementing the code in both python and c++ with the same result. Also tried saving as .png instead of .jpg. The rtsp feed works fine when using imshow to display the camera, the problem only appears to happen when trying to save the frames. From what I can gather the errors have to do with ffmpeg but google isn't much help for these types of errors.


#include <iostream>
#include 
#include <chrono>
#include <thread>

using namespace std;
using namespace cv;

int main() {

 VideoCapture cap("rtsp://admin:admin@192.168.88.97/media/video1");
 if (!cap.isOpened())
 return -1;

 for (int i = 0; i < 500; i++)
 {
 Mat frame;
 cap >> frame;
 imwrite("C:\\Users\\Documents\\Dev\\c++\\OpenCVExample\\frames\\frame" + std::to_string(i) + ".png", frame);
 cout << i << "\n";
 std::this_thread::sleep_for(std::chrono::milliseconds(10));

 }

 return 0;
}
</thread></chrono></iostream>

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