LAV Filters - DirectShow Media Splitter and Decoders

[STaRGaZeR]

Impressions after some light testing:

- SSA, ASS, PGS subtitles don't work (in MKV)
- Stuttering when opening videos, disappears after a few seconds. Sometimes it happens after a seek too
- MKV default flags are ignored
- MP4 files hang MPC without displaying a single frame
- Needs an option for "No subtitles", like Haali

ffdshow as decoder.

[nevcairiel]

Originally Posted by STaRGaZeR

- SSA, ASS, PGS subtitles don't work (in MKV)

Subtitles haven't been tested extensively, i know that TEXT subtitles work, although i thought i saw PGS work as well.
I don't usually watch stuff with subtitles, do you have a sample with ASS and/or SSA? They seem to only really be used with animes, some area of videos that i don't watch and/or have at all.
Edit: nvm, i found a ssa sample on some matroska page.

Originally Posted by STaRGaZeR

- Stuttering when opening videos, disappears after a few seconds. Sometimes it happens after a seek too

I saw that too occasionally. I might have an idea whats causing this and how to fix it, but i'm not 100% sure. It never was really extreme for me that it would really annoy me. I'll keep an eye on it.

Originally Posted by STaRGaZeR

- MKV default flags are ignored

Like i said in an earlier post, smart selection of streams is not implement yet. It'll just pick the first stream of every type.
Once thats implemented it'll respect default and forced flags in addition to language priorities. Hopefully everything in a sane manner.

Originally Posted by STaRGaZeR

- MP4 files hang MPC without displaying a single frame

What video codec? What audio codec? Sample?
I tested on some MP4 with h264 video, not sure what audio codec was in there, though.

Originally Posted by STaRGaZeR

- Needs an option for "No subtitles", like Haali

Indeed, i wanted to get this in the last version, but it somehow slipped by.

Thanks for your testing.

[liquidskin76]

Originally Posted by STaRGaZeR

- Stuttering when opening videos, disappears after a few seconds. Sometimes it happens after a seek too

I can confirm this one too. Stuttering can last as long as a few seconds. That and the crash when closing bug are the only 2 bugs i've come across so.

DTS-HD appears to be working fine!

All my tests are limited to mkv/h264.

[STaRGaZeR]

Originally Posted by nevcairiel

Subtitles haven't been tested extensively, i know that TEXT subtitles work, although i thought i saw PGS work as well.
I don't usually watch stuff with subtitles, do you have a sample with ASS and/or SSA? They seem to only really be used with animes, some area of videos that i don't watch and/or have at all.

I was using ffdshow subtitle filter. Indeed plain text subs are working. The problem with ASS and PGS may be that the splitter it's not correctly formatting the output data. I guess this because when changed to ASS/PGS tracks I get ocasional text on screen, like ·"·"$·"$%"!"!·"$&&/((, with the same font, location, etc. Looks like ffdshow still thinks it's receiving plain text subs.

Originally Posted by nevcairiel

Like i said in an earlier post, smart selection of streams is not implement yet. It'll just pick the first stream of every type.
Once thats implemented it'll respect default and forced flags in addition to language priorities. Hopefully everything in a sane manner.

Yup, just testing the stuff. Haali looks like a great reference for this (without its bugs )

Originally Posted by nevcairiel

What video codec? What audio codec? Sample?
I tested on some MP4 with h264 video, not sure what audio codec was in there, though.

Sure, sample here. All of them are H.264+AAC, your typical MP4 file. It's 5 years old, but newer ones behave the same here.

Oh and another suggestion for when you implement the property page, a bitrate graph would look great, I've always found Haali's one very informative.

This splitter is going to be a bomb when it's finished

[hoborg]

Hm, i got cannot register message - missing module.
Should this splitter be working on WinXP?

BTW, there is no problem to register MPC-HC filters...

[nevcairiel]

You need the VS2010 runtime (link in the first post), but yes, its working on my work laptop which runs XP.

[hoborg]

Originally Posted by nevcairiel

You need the VS2010 runtime (link in the first post), but yes, its working on my work laptop which runs XP.

Oh, i missed that...


EDIT:
Here is my quick tests:

Nearly all of my video samples will freeze Graphstudio on end of video or if i stop playback, some videos freeze durning playback.
I can post samples if interested.

RealMedia seems to be not supported.

Do you have plan to add support for pure audio formats too (like FLAC, DTS, MPC, AC3)?

But great work, even lot of MOV files are now splitted corectly

[nevcairiel]

The freeze issue will be fixed in the next version. And yeah, real is a messy format, while it seems to detect the streams just fine, i cannot get it to connect to the realmedia decoders. Silly things!

I'm not sure how pure audio formats behave right now. I do assume in some places that i have a video stream, or at least i think i do. I'll check that.

I'll try to fix some subtitle issues and push out a new version later today, so the freeze bug is no longer annoying everyone..

[roozhou]

@nevcairiel
Why is there a 4M+ avcodec-52.dll in your package? It is as big as libavcodec.dll in ffdshow. Can you remove some unused codecs and optimized assembly functions for a smaller package?

[nevcairiel]

Not 100% sure what happens when i remove codecs, i believe avformat uses them to probe input formats. Sure, its a bit wasted space, but ultimately the goal is to integrate this into MPC-HC, which already has avcodec.
Its not something i really worry about at this point in time. Maybe later on i can look into slimming this down.

[tiben20]

for the build size it might be the --enable-runtime-cpudetect that make the binary so big. I'm not sure if its really needed but there only one way to figure it out :P

[nevcairiel]

I wasn't sure what would happen if i compile it on my i7 and then someone runs it on a cpu without sse4 for example, so i turned it on. I could of course turn all the optimizations off, i don't think avformat uses them much, thats more of a codec thing.

[nevcairiel]

LAVFSplitter 0.4
- Improved SSA Subtitle support
- Fixed freeze-on-stop issue

Download: 32-bit & 64-bit

Please test, especially subtitles! Thanks!
Sadly the "No Subtitles" option once again eluded me, but i wanted to get this one out today because of the freeze issue. Next version, i promise!

[roozhou]

@nevcairiel
CPU type is determined by -march in --extra-cflags. I use "-march=athlon-xp -mfpmath=sse" and it will run on Pentium3, Athlon-xp and all later CPUs. "--disable-encoders --disable-runtime-cpudetect --disable-asm" will greatly reduce binary size.

[nevcairiel]

Originally Posted by roozhou

@nevcairiel
CPU type is determined by -march in --extra-cflags. I use "-march=athlon-xp -mfpmath=sse" and it will run on Pentium3, Athlon-xp and all later CPUs. "--disable-encoders --disable-runtime-cpudetect --disable-asm" will greatly reduce binary size.

Thanks! I already had encoders disabled, and turning off asm and runtime-cputdetect made the files about 10% smaller again. Its still a total of over 4MB though.

[STaRGaZeR]

Originally Posted by nevcairiel

LAVFSplitter 0.4
- Improved SSA Subtitle support
- Fixed freeze-on-stop issue

Download: 32-bit & 64-bit

Please test, especially subtitles! Thanks!
Sadly the "No Subtitles" option once again eluded me, but i wanted to get this one out today because of the freeze issue. Next version, i promise!

Freeze-on-stop fixed, SSA/ASS working fine now

However, there's still something missing: fonts included in MKV. SSA/ASS subs that use fonts included in the MKV are displayed in the default subtitle renderer font, which is in most cases Arial.

[nevcairiel]

Originally Posted by STaRGaZeR

However, there's still something missing: fonts included in MKV. SSA/ASS subs that use fonts included in the MKV are displayed in the default subtitle renderer font, which is in most cases Arial.

Yeah, about that..
How do i tell the subtitle renderer about that font, exactly?
What do other splitters do? Just install the font system-wide?

Also, i would need a sample with this, as i don't have one.

BTW:
Can you test PGS as well? It seemed to work fine on my sample.

[JarrettH]

Can't wait to see this implemented

[STaRGaZeR]

Originally Posted by nevcairiel

Yeah, about that..
How do i tell the subtitle renderer about that font, exactly?
What do other splitters do? Just install the font system-wide?

Also, i would need a sample with this, as i don't have one.

BTW:
Can you test PGS as well? It seemed to work fine on my sample.

Dunno, but they don't install the font, or at least it isn't in Windows/Fonts after or during playback.

Famous sample in this post: http://forum.doom9.org/showthread.ph...89#post1209289

The issue with PGS is interesting. I have a MKV with SRT and PGS, the first track is SRT. If I play it, SRT subs look good. But, if after displaying a single SRT line I switch to the PGS track, I get this: http://img84.imageshack.us/img84/9356/avatarmq.png. Now, if just after opening the sample I switch to the PGS track, PGS subs look fine. But again, if I switch to the SRT track, nothing will appear. Stream switching bug here it seems.

Sample here: http://www.mediafire.com/?ucid8fzk282jm8b

[Underground78]

Hello,

I've started to test the new splitter with this the sample available in this ticket : [MPEG PS/TS/PVA Splitter] Switching between audio tracks is not immediate. The bug report is also valid with LAVFSplitter 0.4, switching between the audio tracks takes much more time than it does when playing with VLC.

There is also a new bug that appears with the same sample (TS - MPEG2 - ffdshow) : seeking is not possible.

Hope it will help improving this promising new splitter.