C / C++ / MFC

How to improve quality of a video.?

31-Jul-13 22:01

If a post offends me then I will reply in an appropriate manner. Smile | :)

By the way my real name is fat_boy, but that account got closed for pointing out obvious truths about a certain person. Smile | :)

Re: creating empty file

sarfaraznawaz1-Aug-13 2:51

sarfaraznawaz

1-Aug-13 2:51

Can we create the virtual drive of usb .

Re: creating empty file

Rajesh R Subramanian1-Aug-13 6:07

Rajesh R Subramanian

1-Aug-13 6:07

Erudite_Eric wrote:
If a post offends me then I will reply in an appropriate manner.

Yeah, I've done that before, but I found that to be of useful to nobody. I thought I'd just point it out, but you're free to do what you feel is right.

Erudite_Eric wrote:
By the way my real name is fat_boy, but that account got closed for pointing out obvious truths about a certain person.

Now, you're being offensive. Because I consider myself as a regggular here. Smile | :)

Anyone who's been here long enough (and regular) will know your story. But it has nothing to do with the icebergs melting, I tell you.

"Real men drive manual transmission" - Rajesh.

mbatra3129-Jul-13 20:35

29-Jul-13 20:35

Hi,

I am using DirectShow to capture and play video files in our application. I am facing one issue, whenever I play any HD video in our application, it is not of the same quality as it plays in any other Media player ( Windows Media Player, VLC etc....).

Does anybody have any idea what can be the problem...What should I do to Improve the quality of a video.

Do I need any specific codec or any dll which might be required for the same.

Any help will be appreciated.

Regards,
Mbatra

Erudite_Eric29-Jul-13 21:24

29-Jul-13 21:24

How much is it worth to get your product working properly?

I mean, you dont come here with a specific problem, you come here with a 'fix it for me' request. I want to know how much your company is prepared to pay to get their product working.

mbatra3129-Jul-13 21:35

29-Jul-13 21:35

Hi,

Can you please be bit more specific. Is it related to the problem I have asked or related to the forum, that I should not ask for the direct solution.?

Regards,

Erudite_Eric30-Jul-13 0:20

30-Jul-13 0:20

How much research have you done on this problem so far? It seems very little since you dont have specific questions. That is why I havent given you specific answers.

mbatra3130-Jul-13 0:50

30-Jul-13 0:50

Ok fine.

I have not gone too far. I was thinking I might go in the wrong direction.
Please let me know if you need any specific information:

Here I have elaborated what I want:
I am working on a project in which I capture a video using a camera. Now that video plays fine. it will be of the same quality as captured using the camera. I have downloaded some HD video from the net. when I play that video in my application, that video doesn't look like its a HD video. its quality deteriorates somewhat. if I play the same video in any other software (Windows Media player, VLC or any other player which can encode/decode HD video), it plays fine.

Wherever I search on any forum or on any site, I'll found that codecs which uses H.264 standard can better encode/decode HD videos and plays a video with high quality.

Regards,

Erudite_Eric30-Jul-13 2:08

30-Jul-13 2:08

So does your application use codec?

mbatra3130-Jul-13 2:15

30-Jul-13 2:15

I am not sure about this. I am using only DirectShow to capture and play any video file.

Regards,

mbatra3130-Jul-13 2:19

30-Jul-13 2:19

I am using FFmpeg, that produces libraries and programs for handling multimedia data. it includes libavcodec, an audio/video codec library for transcoding multimedia files.

Erudite_Eric30-Jul-13 2:45

30-Jul-13 2:45

And are there any better libraries around?

Erudite_Eric30-Jul-13 2:48

30-Jul-13 2:48

As in, if I google for "directshow codes for HD video" I get this:
Windows Essentials Codec Pack is a collection of audio and video DirectShow codecs and filters

Read more: Windows Essentials Media Codec Pack - Free download and software reviews - CNET Download.com http://download.cnet.com/Windows-Essentials-Media-Codec-Pack/3000-13632_4-10662709.html#ixzz2aX4xtd5d[^]

mbatra3130-Jul-13 22:30

30-Jul-13 22:30

Hi Eric,

I have installed this codec pack on my PC...It does not seem to make any difference....Still playing HD videos shows some blurness at the edges of the objects.

I have seen when playing the same HD video in Windows Media Player, it is quite bright and of good quality. I was wondering what could be the difference in playing a video using DirectShow in Windows Media Player and my Application. Whatelse extra they are implementing or shipping with their product. What special codec or filter is being used.?

Regards,

Erudite_Eric31-Jul-13 4:09

31-Jul-13 4:09

I just found that link from a 2 second google, I didnt recomend it, but just gave it as an exmple of what is out there with the implied suggestion that you look yourself.

mbatra311-Aug-13 19:21

GUID as parameter "conversion" failure

1-Aug-13 19:21

Hi Eric,

I want to ask one thing if you have an idea. I have also searched and found that H.264 is the standard used for HD videos.... Now there are various codec using H.264 as the standard for encoding and decoding. One such is x264 codec which is open source and freely available. I have downloaded that codec, now will that work for my application also, if I play any HD file in my application. I mean to ask is it sufficient that a codec is installed on your PC and if you play any HD file in your application, it will encode HD automatically.?

Regards,

Vaclav_29-Jul-13 5:00

Vaclav_

29-Jul-13 5:00

Why am I getting this error ?
Here is the GUID definition

DEFINE_GUID(GUID_DEVINTERFACE_USB_DEVICE,0xA5DCBF10L, 0x6530, 0x11D2, 0x90, 0x1F, 0x00, 0xC0, 0x4F, 0xB9, 0x51, 0xED);
// (A5DCBF10-6530-11D2-901F-00C04FB951ED)

And here is the usage
hDevInfo = SetupDiGetClassDevs(
&GUID_DEVINTERFACE_USB_DEVICE, NULL, 0, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT);

And here is the compiler complaint:

…. cannot convert parameter 1 from 'const struct _GUID *' to 'struct _GUID *'

Any help will be as always appreciated
Cheers Vaclav

Richard MacCutchan29-Jul-13 5:34

29-Jul-13 5:34

Vaclav_Sal wrote:
Any help will be as always appreciated

Another reminder to please put your code snippets between <pre> tags for readability, thus:

C++

DEFINE_GUID(GUID_DEVINTERFACE_USB_DEVICE,0xA5DCBF10L, 0x6530, 0x11D2, 0x90, 0x1F, 0x00, 0xC0, 0x4F, 0xB9, 0x51, 0xED);
// (A5DCBF10-6530-11D2-901F-00C04FB951ED)

And the answer is that you need to cast away the constness[^] of the definition.

Use the best guess

Vaclav_29-Jul-13 7:31

Vaclav_

29-Jul-13 7:31

Thanks for the answer, but I just cannot select plain text, the options always
stays on code.

Richard MacCutchan29-Jul-13 20:49

29-Jul-13 20:49

Are you using the code link above the edit box? Alternatively you can just type the HTML direct into the edit field.

Use the best guess

Erudite_Eric29-Jul-13 21:27

29-Jul-13 21:27

Hey, come on, this should be simple! Its a casting issue!

I think some times people learn C++ without paying any attention to the fact that it is C as well.

Vaclav_30-Jul-13 4:21

Vaclav_

30-Jul-13 4:21

<pre lang="Thanks, next time I'll ask something more complex if stuff like this is inappropriate"></pre>

Richard - this is what happens when I post as "plain text". Aslo there is no preview.
So here is the message as code - again "Thanks, next time I'll ask something more complex if stuff like this is inappropriate"

Richard MacCutchan30-Jul-13 5:44

draw multiple lines and move then on screen

30-Jul-13 5:44

You need to clear the checkbox at the bottom that says "Treat my content as plain text, not as HTML". There are lots of useful features to the edit pages on these forums, created by the CodeProject staff's hard work and dedication to making this site easy to use. It would be a good idea to spend some time getting familiar with them all.

Use the best guess

appollosputnik28-Jul-13 5:13

appollosputnik

28-Jul-13 5:13

I am writing a pure C based win32 applications. I have drawn line. Now i want to translate that line, move the line whereved user wants to move on screen. Then again I drawn another line, I am drawing multiple lines.

I have created rectangle region for each line and trying to move the line.

When I move the 2nd line over the 1st line on screen the 1st line is getting wiped out. Because I am InvalidateRect() of the rect for the line being moved, so when that rectangle is crossing the other line then the other line is getting removed from the screen.

How can I rectify it. How can I have all the lined being on the screen and moved according to the user's wish. The code should be pure C and win32 no MFC. Please help me how can I do it. Any help is highly appreciated. Thanks Sujan

Re: draw multiple lines and move then on screen

Richard MacCutchan28-Jul-13 6:23