What does the death of Quicktime mean for our existing Isadora patches exactly?

[Fred]

@jtsteph HAP in AVI has been supported for a while I can only praise the results. The files are big but performance is amazing, better than quicktime for sure. There are some threads about this already, but you will need the codec http://renderheads.com/product... and maybe something to encode, I use virtualDub and despite its odd ancient looking interface it is a pretty incredible tool. I did a very big theatre/mapping project and after some bugs got ironed out by mark during our rehearsals I had only 1 small glitch in 30 performances (multiple 4k videos, alpha layers, multi-channel audio). I definitely had good hardware but the system was eating the video files easily. This uses the direct show engine in windows and you can see the movie player display direct show if you are using it for decode.

[jtsteph]

Thank @Fred . I will need to retest, i think. When planning my show this summer, I tested quicktime and directshow and had determined that quicktime had a more predictable interaction and was lighter on the processor. I tested both on my laptop and a giant workstation. I am playing back 4 channels of video (640X480 to 1280X720) with multiple effects, audio reactive clip timing, and audio reactive postion/zoom etc.

I am currently revising my patches for another show and will work to shift everything over to AVI in light of the changes in V3. It's a bit of an onerous task as I work with hundreds of clips.

I will retest the AVI workflow and report back.

- J

[Fred]

@jtsteph I did not test retiming (that could be a sticking point, but it is going to be on any platform as most modern APIs dont support it that well), and I only used HAP avi (what codec were you using with directshow?), I noticed lower overhead. All the gpu based functions will only be limited by your system and have little to do with the container (so effects and position zoom etc as long as you dont use any CPU effects).  I was playing from a raided SSD array and a 1080ti, but it was not needed. 

[jtsteph]

@Fred . Thanks for the information. Yes, I have been making extensive use of retiming - making short animations that increase in complexity and tying the time of those to audio amplitudes is super engaging to watch. Quicktime does this is spades.  

My effects chain is entirely FFGL, I agree that any CPU effects bring things to a crawl. I did compress to HAP AVI but did not see much difference between it and other codecs. This is where I think I will need to retest and perhaps reconsider using retiming (bummer).

My (by now older) laptop below handled everything just fine using quicktime. My workstaion is an 8C/64gb ram/GTX1080 with NVMe storage. It still had issues with AVI in my initial tests.

I will endeavour to test again in the coming days and will post my results.

- J

[Fred]

@jtsteph Maybe we get media foundation integration with version 3.0, it would be great and give us a lot more codecs.

[jtsteph]

Here is another question. Will V3 support MKV with HAP in windows? I just spoke to the myFFMPEG folks. The new version of FFMPEG  and the next version myFFMPEG will support HAP AVI and HAP MKV. MKV is apparently a more contemporary container according to them.

[Fred]

@jtsteph afaik no, there are few discussions on the forum about integrating ffmpeg into Isadora, but for licensing reasons mark has stated this will not happen. Media foundation would be the next step as it can handle hardware decompression of h265. AVI is an older container, but this should not affect you really. They still play and windows does a pretty amazing job of maintaining backwards compatibility, there is no reason to be afraid of AVI, except for the limited codec support.

[Woland]

@jtsteph  Please see Mark's answer about FFmpeg from earlier in this thread:
@mark said:

Common Question: Why won't Isadora 3 support FFmpeg?

The following quote FFmpeg's site should give anyone pause:
Q: Does FFmpeg use patented algorithms?
A: We do not know, we are not lawyers so we are not qualified to answer this. Also we have never read patents to implement any part of FFmpeg, so even if we were qualified we could not answer it as we do not know what is patented. Furthermore the sheer number of software patents makes it impossible to read them all so no one (lawyer or not) could answer such a question with a definite no, those who do lie.

That's a risk I'm not willing to take yet, even though other companies seem to be doing so (Resolume, MAX, etc.) All it would take is one lawsuit to kill Isadora completely.

I will revisit FFmpeg as a possibility after Isadora 3's release. Perhaps if the end user installs the codecs, we'd be safe. That might be one route

[jtsteph]

@fred and @Woland . Thanks for the information. I just managed to get HAP AVIs up and running on my system (there was a conflict with the ffmpeg LAV filters). I let a clip run for the afternoon with a sine wave generator running the time position on the clip. The primary thing that I noted, to get rid of glitchyness, is to turn "loop" off when running variable timings on HAP AVIs with the DS engine. No crashes, no glitches. I will do a performance test over the weekend. Thanks again for all the information.

[DusX]

@jtsteph

In Isadora 2.6.1 looping is not supported (DirectShow does not offer this support), this is why you found it performed better with it set off.
In the upcoming Isadora 3 changes have been made to allow looping playback of Hap Avi in DS mode

[mark_m]

@dusx said:

In the upcoming Isadora 3 changes have been made to allow looping playback of Hap Avi in DS mode

 This makes me inordinately happy! I can hardly wait....!

[jtsteph]

@dusx said:

In the upcoming Isadora 3 changes have been made to allow looping playback of Hap Avi in DS mode

 Great. Thanks for the information @DusX .

[mark_m]

@dusx said:

In the upcoming Isadora 3 changes have been made to allow looping playback of Hap Avi in DS mode

 Oh, does that include palindromic looping? @DusX I do hope so....