2017-08-13 5 views
0

je capture les données de la caméra IP avec le protocole RTSP avec ffmpeg avec la commande:progrès ffmpeg est lorsque le gel des cadres changement de scène

ffmpeg -rtsp_transport tcp -progress /media/kamip/stats.txt -i rtsp://192.168.1.220:554/live/h264/ch0 
-c:v copy -c:a copy -strict 1 -map 0 -f segment -strftime 1 
-segment_time 1800 /media/kamip/cam_%d_%m_%Y_%H_%M_%S.mkv 

J'utilise cela pour 5 caméras. L'un est de type différent et il est dans un endroit différent. Étant donné que ffmpeg ne prend pas en charge la reconnexion, j'écris le statut du fichier /media/kamip/stats.txt. Dans un autre script j'analyse cette sortie et toutes les 30 secondes je vérifie si le numéro d'image a changé, si oui - c'est ok, sinon, je recommence la commande ci-dessus.

Le problème est que dans la nuit. Quand il fait assez sombre et s'allume soudainement, par exemple lorsque la voiture est en stationnement, le fichier /media/kamip/stats.txt affiche le même numéro de cadre, donc mon script le reconnaît comme une connexion perdue (gel vidéo)

J'ai essayé « -strict 1 » option et je pense qu'il est préférable (une fausse alarme par jour au lieu de 10 par jour), donc je pense que cela peut être lié à la source ffmpeg, pas de caméra/vidéo, en particulier parce que la vidéo est très bien même Le nombre d'images rapporté par ffmpeg est toujours le même. Aussi VLC n'a pas ce genre de problème (mais je ne peux pas l'utiliser actuellement pour cet appareil photo)

J'ai trouvé que ffmpeg a un détecteur de changement de scène intégré, mais cela ne devrait fonctionner que lors de l'encodage vidéo (j'utilise " copier "option pour audio et vidéo)?

Je pense à une façon différente d'analyser la capture vidéo, mais cette "-progress" dans ffmpeg devrait fonctionner correctement - et cela fonctionne bien pour d'autres caméras pendant quelques années).

je aussi ne vois pas d'erreur, quand je un fichier codé avec cutted "debug -loglevel" J'ai vu des informations que comme ci-dessous:

[libx264 @ 0x25d77a0] scene cut at 174 Icost:2049115 Pcost:2006553 
ratio:0.0208 bias:0.1387 gop:54 (imb:3186 pmb:168) 

FFmpeg dernière version

ffmpeg version 3.3.3-1ubuntu1~16.04.york0 Copyright (c) 2000-2017 the FFmpeg developers built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609

toute aide sera appréciée

+0

Ce changement de scène msg est liée au codeur estimation que ce soit moins cher de se poursuivre sans un nouveau cadre IDR ou non. Besoin de voir un extrait du fichier de progression en commençant juste avant le gel et juste après. – Mulvya

+0

merci pour l'explication. Je vais recueillir cette sortie, comme je l'ai dit, maintenant avec "-strict 1" est beaucoup beaucoup mieux. – Karol

Répondre

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Ok, j'ai sortie de la progression. il arrêté sur le cadre = 2502417

Le fichier vidéo a 17 minutes 14 secondes. La lumière s'est allumée environ 2,5 secondes avant la fin du fichier.

Progrès, quelques images avant le gel du numéro d'image (sur le châssis: 2502417)

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0
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stream_0_0_q=-1.0 
bitrate=N/A 
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0

Je capturé journal avec le niveau de débogage pour ffmpeg, partie intéressante est ci-dessous:

[segment @ 0x80232240] stream:1 start_pts_time:7200.01 pts:8714067 pts_time:8714.07 dts:8714067 dts_time:8714.07 -> pts:8714067 pts_time:8714.07 dts:8714067 dts_time:8714.07 
[matroska @ 0x80250ba0] Writing block at offset 689225, size 160, pts 8714047, dts 8714047, duration 20, keyframe 1 
[segment @ 0x80232240] stream:1 start_pts_time:7200.01 pts:8714087 pts_time:8714.09 dts:8714087 dts_time:8714.09 -> pts:8714087 pts_time:8714.09 dts:8714087 dts_time:8714.09 
[matroska @ 0x80250ba0] Writing block at offset 689392, size 160, pts 8714067, dts 8714067, duration 20, keyframe 1 
[segment @ 0x80232240] stream:0 start_pts_time:7200.01 pts:8714105 pts_time:8714.1 dts:8714105 dts_time:8714.1 -> pts:8714105 pts_time:8714.1 dts:8714105 dts_time:8714.1 
[matroska @ 0x80250ba0] Writing block at offset 689559, size 160, pts 8714087, dts 8714087, duration 20, keyframe 1 
[matroska @ 0x80250ba0] Writing block at offset 689726, size 112950, pts 8714105, dts 8714105, duration 0, keyframe 0 
frame=123815 fps= 14 q=-1.0 size=N/A time=02:25:14.54 bitrate=N/A speed= 1x  
frame=123815 fps= 14 q=-1.0 size=N/A time=02:25:16.47 bitrate=N/A speed= 1x  
frame=123815 fps= 14 q=-1.0 size=N/A time=02:25:16.93 bitrate=N/A speed= 1x  
frame=123815 fps= 14 q=-1.0 size=N/A time=02:25:17.45 bitrate=N/A speed= 1x  
frame=123815 fps= 14 q=-1.0 size=N/A time=02:25:17.95 bitrate=N/A speed= 1x  
frame=123815 fps= 14 q=-1.0 size=N/A time=02:25:18.47 bitrate=N/A speed= 1x  
frame=123815 fps= 14 q=-1.0 size=N/A time=02:25:18.99 bitrate=N/A speed= 1x  
frame=123815 fps= 14 q=-1.0 size=N/A time=02:25:19.49 bitrate=N/A speed= 1x  
frame=123815 fps= 14 q=-1.0 size=N/A time=02:25:20.01 bitrate=N/A speed= 1x  
frame=123815 fps= 14 q=-1.0 size=N/A time=02:25:20.45 bitrate=N/A speed= 1x  
frame=123815 fps= 14 q=-1.0 size=N/A time=02:25:21.03 bitrate=N/A speed= 1x  
frame=123815 fps= 14 q=-1.0 size=N/A time=02:25:21.66 bitrate=N/A speed= 1x  
frame=123815 fps= 14 q=-1.0 size=N/A time=02:25:22.16 bitrate=N/A speed= 1x  
frame=123815 fps= 14 q=-1.0 size=N/A time=02:25:22.68 bitrate=N/A speed= 1x  
frame=123815 fps= 14 q=-1.0 size=N/A time=02:25:23.20 bitrate=N/A speed= 1x  
frame=123815 fps= 14 q=-1.0 size=N/A time=02:25:23.70 bitrate=N/A speed= 1x  
[segment @ 0x80232240] Delay between the first packet and last packet in the muxing queue is 10014000 > 10000000: forcing output 
[segment @ 0x80232240] stream:1 start_pts_time:7200.01 pts:8714107 pts_time:8714.11 dts:8714107 dts_time:8714.11 -> pts:8714107 pts_time:8714.11 dts:8714107 dts_time:8714.11 
[segment @ 0x80232240] Delay between the first packet and last packet in the muxing queue is 10014000 > 10000000: forcing output 
[segment @ 0x80232240] stream:1 start_pts_time:7200.01 pts:8714127 pts_time:8714.13 dts:8714127 dts_time:8714.13 -> pts:8714127 pts_time:8714.13 dts:8714127 dts_time:8714.13 
[matroska @ 0x80250ba0] Writing block at offset 802684, size 160, pts 8714107, dts 8714107, duration 20, keyframe 1 
[segment @ 0x80232240] Delay between the first packet and last packet in the muxing queue is 10014000 > 10000000: forcing output 
[segment @ 0x80232240] stream:1 start_pts_time:7200.01 pts:8714147 pts_time:8714.15 dts:8714147 dts_time:8714.15 -> pts:8714147 pts_time:8714.15 dts:8714147 dts_time:8714.15 

et alors le fichier est fini.

Malheureusement, je ne pouvais pas trouver une solution pour cette erreur.