VLC DirectShow - Stream(Desktop&Audio)

[n8nie]

Hi...

I'm now trying to stream both desktop & audio(mic recording) at the same time.
Before I install screen capture input filter,i was able to stream the audio but now I unable to stream out the audio.
My system(win xp) audio properties doesn't have any option to set my recording to wave out.
I did try to use virtual audio cable but it fails too. Please help me. I'm totally a newbie.

[cunyalen]

I tried UScreenCapture and VH Screen Capture. UScreenCapture works fine with audio output. I'm using Div3+Mp3 (ASF) output.

VH Screen Capture gets much better image quality than UScreenCapture. But I have the similar problem with VHScrCap. When I stream to file MP4 without audio, it works fine. And MP4 seems to be the only format I can output. When I have audio added (from sound card) and stream it to MP4 file again. The file is shown to have video and audio data (MPEG4+AAC) using MediaInfo. But when I play it, I can only hear sound, but not picture.

I install VH toolkit. When I use VHScrCap in the toolkit, I can capture screen and output to many different formats.

[cunyalen]

Finanlly, VLC works with VH Screen Capture.

Container: Video Codec, Audio Codec ~ File Size
MPEG-TS: MPEG4 (4096 kbps, 25fps),MP3(128 kbps,44100,2) ~ 30M
AVI: MPEG4 (4096 kbps, 25fps),MP3(128 kbps,44100,2) ~ 30M
AVI: H.264 (4096 kbps, 25fps),MP3(128 kbps,44100,2) ~ 2.5M

MPEG-TS: H.264 (4096 kbps, 25fps),MP3(128 kbps,44100,2)
Video and audio not synchronized, video starts a while after the audio starts.

MKV: H.264 (4096 kbps, 25fps),MP3(128 kbps,44100,2) Not sure, works once, then not worked again. Maybe there's also delay.

I can't get any container work for DivX 3.

I checked the files with MediaInfo. When I use MPEG4(Avi), the avi file is shown to have MPEG-4Visual (XviD), while MPEG4(TS) shows MPEG-4Visual. I'm wondering why the file size is so different for XviD and H.264. People are comparing these codecs. I was assuming they would generate similar thing.

[cunyalen]

1. The TS and AVI files that I saved using the method above can't be played by other software except VLC.
2. MMS, HTTP, RTP, RTSP streamings are tested for AVI/TS(H.264/MPEG4). The streaming is unstable. Sometimes, there's a long delay. Sometimes, I can't get the image right away.

[cunyalen]

Further tested.
TS: H.264(AVC) + AAC
H.264(4096 kbps, 25fps),AAC(128 kbps,44100,2) ~ 3.77M

FLV: H.264(AVC) + AAC
H.264(4096 kbps, 25fps),AAC(128 kbps,44100,2) ~ 690K

1. It seems using same parameters, H.264 makes the best quality and smallest file size. For containers, using FLV makes the smallest file size.
2. It seems VH Screen Capture takes less resources than UScreenCapture. The image quality is about the same using the same codecs. It seems it is harder to make connections with VH than UScreen for streaming. But UScreen makes my computer and the network much slower.
3. It's not consistent for different computers. On one computer (Thinkpad x61t), both files above can play. But VLC+VH can only stream TS properly. VLC+UScreen can stream both TS and FLV fine. But on another computer (Dell Optiplex 755), only TS plays file and FLV only plays audio. Another one (Dell Latitude D610) plays neither. Different computers have different hardware and drivers, that may make a difference. But I'm not sure.