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ANNEXE : Les plugins utilisés spécifiquement pour la ferme
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Les sons
15 mai 2013, par -
Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir
Sur d’autres sites (8271)
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When I run ffmpeg Im getting "output file #0 does not contain any stream" [duplicate]
29 novembre 2020, par 0 dayIm trying to feed live stream from ffmpeg to ffserver but Im getting this error


libavutil 55. 78.100 / 55. 78.100
 libavcodec 57.107.100 / 57.107.100
 libavformat 57. 83.100 / 57. 83.100
 libavdevice 57. 10.100 / 57. 10.100
 libavfilter 6.107.100 / 6.107.100
 libavresample 3. 7. 0 / 3. 7. 0
 libswscale 4. 8.100 / 4. 8.100
 libswresample 2. 9.100 / 2. 9.100
 libpostproc 54. 7.100 / 54. 7.100
Input #0, x11grab, from ':0.0':
 Duration: N/A, start: 1606657336.654899, bitrate: N/A
 Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1680x1050, 25 fps, 24.92 tbr, 1000k tbn, 1000k tbc
Output #0, alsa, to 'http://localhost:8090/feed.ffm':
Output file #0 does not contain any stream


here is my cli


ffmpeg -probesize 1000M -framerate 25 -video_size 1680x1050 -f x11grab -i :0.0 -f alsa -c:a aac -vf format=yuv420p http://localhost:8090/feed1.ffm


I'v looked at this and this but it did not helped


How can I fix


Output file #0 does not contain any stream

EDIT :


ffmpeg -probesize 1000M -framerate 25 -video_size 1680x1050 -f x11grab -i :0.0 -f alsa -i default -c:a aac -vf format=yuv420p http://localhost:8090/feed1.ffm
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers

Input #0, x11grab, from ':0.0':
 Duration: N/A, start: 1606679309.355016, bitrate: N/A
 Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1680x1050, 25 fps, 24.92 tbr, 1000k tbn, 1000k tbc
Guessed Channel Layout for Input Stream #1.0 : stereo
Input #1, alsa, from 'default':
 Duration: N/A, start: 1606679310.190079, bitrate: 1536 kb/s
 Stream #1:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
Stream mapping:
 Stream #1:0 -> #0:0 (pcm_s16le (native) -> mp2 (native))
 Stream #0:0 -> #0:1 (rawvideo (native) -> mpeg1video (native))
 Stream #0:0 -> #0:2 (rawvideo (native) -> vp8 (libvpx))
Press [q] to stop, [?] for help
[x11grab @ 0x561e2391da00] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
[mpeg1video @ 0x561e23968400] bitrate tolerance 21333 too small for bitrate 64000, overriding
[mpeg1video @ 0x561e23968400] MPEG-1/2 does not support 3/1 fps
Error initializing output stream 0:1 -- Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height
[alsa @ 0x561e23926c40] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
Conversion failed!


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audio/mp4 ; codecs="mp4a.40.2" not playing in Chrome and Firefox
19 octobre 2020, par Stefan FalkIt seems I want to convert audios, which I want to stream on my website, to
audio/mp4; codecs="mp4a.40.2".

Using
ffmpeg-cli-wrapper, I am converting my uploaded audio files with this command here :

ffmpeg -i /tmp/input.any -acodec aac -b:a 256000 /tmp/output.aac


On the client I am creating a SourceBuffer like this :


this.sourceBuffer = this.mediaSource.addSourceBuffer('audio/mp4; codecs="mp4a.40.2"');


The errors are :


Chrome :


NotSupportedError: Failed to load because no supported source was found.


Firefox :


NotSupportedError: The media resource indicated by the src attribute or assigned media provider object was not suitable.


Here comes the fun part :


If I create the SourceBuffer using
audio/aacas mime-type :

this.sourceBuffer = this.mediaSource.addSourceBuffer('audio/aac');


the audio gets played correctly on Chrome but Firefox says :


MediaSource.addSourceBuffer: Type not supported in MediaSource



Update


After changing the command to


ffmpeg -i /tmp/input.any -acodec aac -b:a 256000 /tmp/output.mp4
 ^^^ 


Chrome/Firefox do not give an error when using
audio/mp4; codecs="mp4a.40.2", but the audio is not being played.


See


- 

- https://stackoverflow.com/a/64432478/826983




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"Could not demultiplex stream" in loading Video recorded by Opencv's VideoWriter
21 novembre 2020, par batumanMy program is



int main(){
 cout << "Start the process" << endl;
 cv::VideoCapture vcap("rtsp://root:pass@192.168.0.90/axis-media/media.amp?camera=1");
 cout << "Camera connection done!" << endl;
 cv::Mat image, small;
 //Output video
 cv::Size S = cv::Size((int) vcap.get(CV_CAP_PROP_FRAME_WIDTH), (int) vcap.get(CV_CAP_PROP_FRAME_HEIGHT));
 int ex = static_cast<int>(vcap.get(CV_CAP_PROP_FOURCC));
 int fps = vcap.get(CV_CAP_PROP_FPS);
 cout << "fps " << fps << " ex " << ex << endl;
 cv::VideoWriter outputVideo;
 outputVideo.open("TEST.avi", ex/*CV_FOURCC('X', '2', '6', '4')*/, vcap.get(CV_CAP_PROP_FPS), S, true);
 if(!outputVideo.isOpened()){
 cout << "Could not open the output video for write" << endl;
 return -1;
 }

 for(;;){
 if(!vcap.read(image)){
 std::cout << "No frame" << std::endl;
 cv::waitKey(0);
 }

 cv::resize(image, small, image.size()/2, 0, 0 , cv::INTER_LINEAR);
 cv::imshow("Display", small);
 cv::waitKey(1);
 outputVideo.write(small);
 if(getkey() == '\n')
 break;
 }
 cout << "Camera release" << endl;
 outputVideo.release();
 vcap.release();
 image.release();
 small.release();
 return 0;
}
</int>


int ex = static_cast<int>(vcap.get(CV_CAP_PROP_FOURCC));</int>ex is 0 here.


I can record the TEST.avi, but can't be read by cv::VideoCapture vcap("TEST.avi") ; or VLC player or Videos in Ubuntu.
The error is
"Could not demultiplex stream".


If I changed to



outputVideo.open("TEST.avi", CV_FOURCC('X', '2', '6', '4'), vcap.get(CV_CAP_PROP_FPS), S, true);
outputVideo.open("TEST.avi", CV_FOURCC('P','I','M','1'), vcap.get(CV_CAP_PROP_FPS), S, true);
outputVideo.open("TEST.avi", CV_FOURCC('M', 'P', '4', '2'), vcap.get(CV_CAP_PROP_FPS), S, true);
etc.



all have same problem.



If I set



outputVideo.open("TEST.avi", CV_FOURCC('i', 'Y', 'U', 'V'), vcap.get(CV_CAP_PROP_FPS), S, true);



I have error as
Opencv: FFMPEG iYUV is not supported with codec id 14


For



outputVideo.open("TEST.avi", CV_FOURCC('M', 'J', 'P', 'G'), vcap.get(CV_CAP_PROP_FPS), S, true);


OpenCV Error: Assertion failed (img.cols == width && img.rows == height && chann
els == 3) in write, file /home/Softwares/opencv/opencv/modules/videoio/src/
cap_mjpeg_encoder.cpp, line 829
terminate called after throwing an instance of 'cv::Exception'
 what(): /home/Softwares/opencv/opencv/modules/videoio/src/cap_mjpeg_enco
der.cpp:829: error: (-215) img.cols == width && img.rows == height && channels =
= 3 in function write



What could be wrong ? Is that my FFMPEG has problem ?


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