Are loud speaker & music speaker the same on smartphone. Or are they two separate speakers?
Thanks,
Thang
It is depend on your device. On my device, they are same.
Related
I am using the fluid_synth_process () function in my custom fx function to modulate audio according to the example in. But this seems to modulate audio from all midi channels globally. How do I modulate audio output from every midi channel separately?
I need to open the default audio capture device and start recording. libsox seems to be a nice cross-platform solution. Using the binary frontend, I can just rec test.wav and the default microphone is activated.
However, when browsing the documentation, no similar functionality exists. This thread discusses precisely the same topic as my question, but doesn't seem to have reached a solution.
Where could an example of using libsox for recording from the default audio device be located?
You can record using libsox. Just set the input file to "default" and set the filetype to the audio driver (e.g. coreaudio on mac, alsa or oss on linux)
const char* audio_driver = "alsa";
sox_format_t* input = sox_open_read("default", NULL, NULL, audio_driver);
Look at some examples for more info on how to structure the rest of the code.
You need to record with alsa first and use libsox for the right format. libsox is not for recording. see example: https://gist.github.com/albanpeignier/104902
I am implementing the operation of encoding video with TI DM365 mpeg4 encoder and containerizing it with ffmpeg mp4 container using a dummy FMP4 codec to produce headers and footers. While the container is proven to be working correctly using similar Intel based mpeg4 encoder, the dm365 gives a mosaic result if P frames are used at all. Using only I frames works, but I would like to minimize amount of data stored.
The example of the result can be viewed here. Settings are 1-Iframe, 9-Pframes
TI developers didn't answer my question regarding this in 2 days, so I am trying to get help here.
This may help, a TI data sheet on the various settings/parameters and their effect. Apologies if it is telling you stuff you already know...
TI Data Sheet spraba9.pdf
Please guide me to achieve the following result in my program (written in C):
I have a stream source as HTTP MPEG TS stream (codecs h264 & aac), It has 1 video and 1 audio substream.
I need to get MPEG ES frames (of same codecs), to send them via RTP to
RTSP clients. It'll be best if libavformat give frames with RTP
header.
MPEG ES is needed, because, as i know, media players on Blackberry
phones do not play TS (i tried it).
Although, i appreciate if anyone point me some another format, easier to get
in this situation, that can hold h264 & aac, and plays well on
blackberry and other phones.
I've already succeed with other task to open the stream and remux to
FLV container.
Tried to open two output format contexts with "rtp" formats, also got
frames. Sent to client. No success.
I've also tried writing frames to "m4v" AVFormatContext, have got
frames, have cut them by NAL, added RTP header before each frame, and sent to client. Client displays 1st frame and hangs, or plays a second of video+audio (faster than needed) each 10 seconds or more.
In VLC player log i have this: http://pastebin.com/NQ3htvFi
I've scaled timestamps to make them start with 0 for simplicity.
I compared it with what VLC (or Wowza, sorry i dont remember) incremented audio TS by 1024, not 1920, so i did additional linear scaling to be similar to other streamers.
Packet dump of playback of bigbuckbunny_450.mp4 is here:
ftp://rtb.org.ua/tmp/output_my_bbb_450.log
BTW in both cases i've hardly copied SDP from Wowza or VLC.
What is the right way to get what i need?
I'm also interested if there's some library similar to
libavformat? Maybe even in embryo state.
i have usb-modem that i can comunicate with it using AT-Command.
i can send and recive sms using it.
we know that we can insert an SD-Card into the usb-modem and use it as a storage device
but i been stuck for days searching how i can work on files on sd card using AT-Command??
please help. thanks in advance
I don't think you can do this. The AT command-set is only for doing "phonestuff". Calling, texting (which in itself is an extension), and such.
The usual reason for usb-modems to have built-in storage is so you can store the drivers there. This would let you use the modem on any computer without needing to connect to the internet to get the drivers.
Are you sure the modem doesn't expose the card as a drive as other USB devices do (e.g cameras, phones, etceteras)? I can't see a way of retrieving files off it using ATxx commands.
Edit, I did a little digging and found this:
https://wiki.archlinux.org/index.php/Huawei_E1550_3G_modem#AT_commands
And I am wondering if any of the following can point you in the right direction:
AT^U2DIAG=0 - the device is only Modem
AT^U2DIAG=1 - device is in modem mode + CD ROM
AT^U2DIAG=255 - the device in modem mode + CD ROM + Card Reader
AT^U2DIAG=256 - the device in modem mode + Card Reader
AT+CPIN=<PIN-CODE> - enter PIN-code
AT+CUSD=1,<PDU-encoded-USSD-code>,15 - USSD request, result can be found (probably) in /dev/ttyUSB2.
So it would appear you can put the device in a card-reader mode using AT^U2DIAG=256. I'd be interested to see if, when you execute this, whether your drive will then be mapped. I can't really find anything to get files off it after you do this.