I want to display a stream, and monitor the video stats of the displayed stream while recording it using libvlc. When I use sout + duplicate to record the stream while displaying it, I can only get the demux_bitrate stat from the displayed stream using libvlc_media_get_stats function. I am looking to get decoded_video, displayed_pictures, etc as well.
I've tried using the duplicate module to try to make this happen but I can't seem to make this work - am not sure if what I want to do is supported. Code below is tweaked from https://wiki.videolan.org/Documentation:Modules/display/ example for transcoding a stream while displaying the original version.
:sout=#duplicate{dst='transcode{vcodec=h264}:std{access=file,mux=ts,dst=c:\junk\test.mp4}',dst=display}
The stream displays, the file is generated, but the only valid stat is demux_bitrate which seems like the stat that would be accessible from the non-display stream instead of the displayed version.
Display and save with Transcoding
:sout=#duplicate{dst=display,dst="transcode{vcodec=h264}:standard{access=file,mux=mp4,dst=c:\junk\test.mp4}"}
Display and save without Transcoding
:sout=#duplicate{dst=display,dst=standard{access=file,mux=mp4,dst=c:\junk\test.mp4}}
Related
I'm using FileHandle to write stream of bytes to the mp4 file.
My data source allows me to input bytesOffset which is basically the current size of the file (if 0 it starts from the beginning, if more then it continue to save until reaches end).
I want to implement restart functionallity, but when write gets interrupted, the file exist, but size is always 0 KB.
Do you know any way to solve this or know any library which could help me with implementing this?
You can use Shamik framework for that.
Assuming I use OMSF, FlowPlayer or FWPlayer (all of these are open source), do you know if it is possible to retrieve the output from the decoder (a streaming stream) so that I can detect image freezes, artifacts, get bitrate, current level etc ... ?
Thank you !
I have a Delphi 6 application that uses the DSPACK DirectShow component library. Currently I am getting the error "no combination of intermediate filters could be found" when I attempt to connect the Capture pin on an audio capture device to the Input pin of another filter. I believe I am setting the media formats correctly. I have an error trap and in that trap I query explicitly both pins for the exact media format they are set to in case there is an incongruity. When I do this, both pins come back with the exact same WAV format:
format tag: 1
number of channels: 1
bits per sample: 16
sample rate: 8000
That matches up to what I set both filters to, yet I am getting an error that (usually as far as I know) indicates a format incompatibility. Has anyone run into this error before and knows what I might be doing wrong or what other kinds of tests/inspections I can do?
It turns out the error was being caused by the media format I was returning from my push source audio filter. I had the wrong sub-type and that was triggering the "no combination of intermediate filters could be found" error from DirectShow since the sub-type I was using in my push source filter was incorrect and not compatible with other filters like the Capture filter I was using in my filter graph. See the "UPDATE" note in my thread on media format's for full details:
Correct Media Type settings for a DirectShow filter that delivers Wav audio data?
i have tried to record the audio in wav format and i succeeded but when i try to play that file, it gives an error that 'media file is of unsupported format'.
the main portion of code is as follows:
player = Manager.createPlayer("capture://audio?encoding=pcm&rate=44100&bits=16&channels=1");
player.realize();
controller = (RecordControl) player.getControl("RecordControl");
controller.setRecordLocation("file:///SDCard/BlackBerry/voicenotes/voice.wav");
//controller.setRecordSizeLimit(396900);
controller.startRecord();
player.start();
Thread.sleep(7000);
controller.commit();
player.close();
This code works well and it gave me a voice.wav file but i am not able to play this file.Is there is something which i forget?
Thanks in advance.
Sounds like the same problem as here:
http://supportforums.blackberry.com/t5/Java-Development/Bug-in-media-Manager-Player/td-p/1009027/page/2
Essentially, you need to add the RIFF/WAVE-header for the recorded data yourself, see the last post on the thread for example.
HI
I am new to Blackberry.
I am developing an application to get the song name from the live audio stream. I am able to get the mp3 stream bytes from the particular radioserver.To get the song name I add the flag "Icy-metadata:1".So I am getting the header from the stream.To get the mp3 block size I use "Icy-metaInt".How to recognize the metadatablocks with this mp3 block size.I am using the following code.can anyone help me to get it...Here the b[off+k] is the bytes that are from the server...I am converting whole stream in to charArray which is wrong, but how to recognize the metadataHeaders according to the mp3 block size..
b[off+k] = buffers[PlayBuf]PlayByte];
String metaSt = httpConn.getHeaderField("icy-metaint");
metaInt=Integer.parseInt(metaSt);
for (int i=0;i<b[off+k];i++)
{
metadataHeader+=(new String(b)).toCharArray();
System.out.println(metadataHeader);
metadataLength--;
Blackberry has no native regex functionality; I would recommend grabbing the regexp-me library (http://code.google.com/p/regexp-me/) and compiling it into your code. I've used it before and its regex support is pretty good. I think the regex in the code you posted would work just fine.