ffdshow tryouts project: Discussion & Development

[v0lt]

You can add support for FOURCC 'png '? It is used in the mov-files. I used the same decoder, which decodes the "PNG1" and "MPNG". I substituted the FOURCC in the splitter, but it's not the best solution.

mov-png_example

I wanted to do the same "jpeg" (ffdshow_mediaguids.h, section //quicktime), but do not completely understand how to add changes in TglobalSettings.cpp.

[dansrfe]

@ Midzuki
How do I do the same thing you did with the ffdshow audio processor outputting to raw?

Thanks!

[Midzuki]

@ dansrfe:

1) patch a copy of ffdshow.ax ;
2) unregister the original ffdshow.ax ;
3) hide the original ffdshow.ax in a temp folder,
move the modified .ax into ffdshow's folder ;
4) register the patched .ax file ;
5) start playing a DVD with MPC,
then press the pause button ;
6) run Graphstudio, press CTRL + G, click "Connect" ;

N.B.: I configured MPC to "prefer" ffdshow audio processor, since its default merit status is "DO_NOT_USE".

P.S.: Several weeks ago, Keiyakusha tried to convince that "it would be very bad" if ffdshow had dedicated standalone filters, without shared capabilities & settings.
Now, let's see whether he will change his mind.

[Keiyakusha]

Not really. I don't have anything against "dedicated" filters or something. I just don't want to see things like subtitles rendering removed from raw filter functionality.

[Gleb Egorych]

As I understand, revsion 3608 reverts 3589, i.e. mpeg decoders are now integer again.

[clsid]

Nope, they are still float.

[Gleb Egorych]

For example, all changes made in mpegaudiodec.c with 3589 are reverted with 3608. But seems these changes are relevant to disabled decoders and don't touch float decoders.

[hoborg]

MOV PCM problem

Hi.
I have problem with playback of few MOV files from Canon IXUS 200 IS.
It play in wierd slow motion in graphstudio - 2.5FPS.
If i disable audio, it play just fine.
Here is graph:

MP4Splitter.ax rev.1.4.2646.0, FFDshow 3608

MPC MPA audio decoder play it without any issue too on both machines.

Here video is sample

Media info:

Video
ID                               : 1
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : Baseline@L4.1
Format settings, CABAC           : No
Format settings, ReFrames        : 1 frame
Codec ID                         : avc1
Codec ID/Info                    : Advanced Video Coding
Duration                         : 4s 566ms
Bit rate mode                    : Variable
Bit rate                         : 23.1 Mbps
Width                            : 1 280 pixels
Height                           : 720 pixels
Display aspect ratio             : 16:9
Frame rate mode                  : Constant
Frame rate                       : 30.000 fps
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.837
Stream size                      : 12.6 MiB (97%)
Language                         : English
Encoded date                     : UTC 2010-10-03 10:07:35
Tagged date                      : UTC 2010-10-03 10:07:35
Color primaries                  : BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177
Transfer characteristics         : BT.709-5, BT.1361
Matrix coefficients              : BT.601-6 525, BT.1358 525, BT.1700 NTSC, SMPTE 170M

Audio
ID                               : 2
Format                           : PCM
Format settings, Endianness      : Little
Format settings, Sign            : Signed
Codec ID                         : sowt
Duration                         : 4s 566ms
Bit rate mode                    : Constant
Bit rate                         : 705.6 Kbps
Channel(s)                       : 1 channel
Sampling rate                    : 44.1 KHz
Bit depth                        : 16 bits
Stream size                      : 393 KiB (3%)
Language                         : English
Encoded date                     : UTC 2010-10-03 10:07:35
Tagged date                      : UTC 2010-10-03 10:07:35

The strange thing is, that it seems this problem only affect realtek sound cards, home i have SoubBlaster, and it play just fine.

[dansrfe]

Works fine on my side with ffdshow latest build, madVR latest build, and MPC-HC 32-bit latest build.

[hoborg]

Originally Posted by dansrfe

Works fine on my side with ffdshow latest build, madVR latest build, and MPC-HC 32-bit latest build.

I was able to reproduce this issue on Intel Atom and Realtec HD audio. At home it is working fine C2D+Audigy4.

No idea what can causing it, but if i use MPC MPA audio decoder, it is working fine, so must be something in FFDshow.

[Atak_Snajpera]

@devs
Possible bug in h.264/avc decoder
Haali Media Splitter + ffdshow r3572 (libavcodec / ffmpeg-mt with 1-4 threads) = corrupted image
Haali Media Splitter + ffdshow r3572 (DVXA enabled) = no corruption



sample
http://www.mediafire.com/?4z2as0yjvnjoage

[augur]

hi,
since rev.3501 (3500 works fine) when I'm seeking fast (holding & sliding the cursor) with mpc-hc, it crash.

After many tests, i've found that this is caused by the AC3 encoding option (16, 32 & 32 float are ok), absolutely nothing else is activated (i used 48000hz inputs since resample was desactivated).

On the MPC side, i've found that if i disable his filters (avi & mp3 for my tests) it works again.
Going back to previous versions didn't do anything (last try:1.3.1896)

sorry for my poor english & testing abilities , and thanks for all your work.

system: XP sp3. ffdshow x86 regular & icl11

edit: doesn't seem to crash with multichannels tracks (tried ac3,truehd, dts(hd), lpcm)

[XhmikosR]

@clsid: rev3610 broke ffmpeg-mt. It's crashing with every h264 video I've tried while rev3609 works fine.

[clsid]

Should be fixed in 3611.

[dansrfe]

ffdshow does not render pgs subtitles from a .ts file at all. Internal mpc renderer with EVR-CP renders it fine. Also I want to bump the broken karaoke ssa support in ffdshow problem. Please give some sort of eta of when these problems can be expected to be fixed. Thanks again ffdshow devs.

[LigH]

I have a problem with ffdshow expanding the height of the video, repeating lower lines, if it is not MOD 16. But it does that in a rather strange way.

- ffdshow_rev3611_20101006_xvidvideo-ru_x86_icl11
- mpc-homecinema.1.4.2667_(x86)_msvc2010

both from xvidvideo.ru; this effect happened with earlier versions too.

At first I usually had disabled all internal decoders and splitters of MPC-HC where useful, to allow decoding via ffdshow. But it appears that the MPC-HC internal decoder does the same as ffdshow.

The media info dialog in MPC-HC (Shift+F10; Details) shows the following values, depending on ffdshow or MPC-HC wether or not using DXVA for decoding H.264:

a) if DXVA decoding for H.264 is enabled: General { Video size = 640 x 368 }; stream list { Video: MPEG4 Video (H264) 640x360 25.00fps [Video] } -- at least MOD 16
b) if DXVA decoding for H.264 is disabled: General { Video size = 640 x 372 }; stream list { Video: MPEG4 Video (H264) 640x360 25.00fps [Video] } -- not even MOD 16?!

Test files: MP4 or MKV (same content, ~330 KB each)



P.S.: DGIndexNV 2026 and 2030 warn "Stream specifies cropping" (for the MKV) and report the "coded size" as 640x384 (even MOD 32).

[jmone]

Can I confirm a comment in some MADFLAC threads that FLAC decoding in FFDSHOW is only 16-Bit (eg 24-Bit source material is decoded to 16-Bit).
Thanks
Nathan

[magic144]

any chance the DXVA filter can be made to produce the same output as the software-only filter in the following respect...

for interlaced material,
output colorspace - e.g. NV12 only
set interlace flag in output media type

I find this is essential when watching e.g. some Concert Blu-Rays.

just wondering if it's possible!
also could the DXVA filter be somehow rolled into the main filter such that it can be chosen based on a profile rule?
(and is there any way of creating a profile rule to distinguish interlaced from non-interlaced content??)

[Gleb Egorych]

Originally Posted by jmone

Can I confirm a comment in some MADFLAC threads that FLAC decoding in FFDSHOW is only 16-Bit (eg 24-Bit source material is decoded to 16-Bit).
Thanks
Nathan

Since FLAC decoding in ffdshow is done by libavcodec, the output is indead 16-bit.

[jmone]

Thanks - so all 24-Bit sources using libavcodec (eg True-HD) is also only 16bit. Any plans to support 24-bit?
Thanks
Nathan