February 2011 - MPlayer-dev-eng - lists.mplayerhq.hu

[PATCH] add support of compression algorithm 3 in mkv demuxer
by Alexander Beregalov 02 Jan '12

02 Jan '12

Specs from http://www.matroska.org/technical/specs/ : ContentCompAlgo The compression algorithm used. Algorithms that have been specified so far are: 0 - zlib, 1 - bzlib, 2 - lzo1x, 3 - Header Stripping. ContentCompSettings Settings that might be needed by the decompressor. For Header Stripping (ContentCompAlgo=3), the bytes that were removed from the beggining of each frames of the track. I have such file, it works for me. | + A track | + Track number: 2 | + Track UID: 2 | + Track type: audio | + Lacing flag: 1 | + Default flag: 1 | + Codec ID: A_AC3 | + Content encodings | + Content encoding | + Content compression | + Algorithm: 3 (header removal) | + Settings: length 2, data: 0x0b 0x77 See an attachment. Please comment.

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DxVA in MPlayer
by Georgi Petrov 26 Jun '11

26 Jun '11

Hello, I'm Georgi Petrov and a year ago I developed the Direct 3D renderer. Now I'm interested in implementing DxVA support in MPlayer. Yesterday I started to investigate the amount of work and any difficulties I may have and I came up with the following questions: 1. Since DxVA 2 requires EVR renderer (the current Direct 3D one won't work), I suppose that the best way to start is implementing a working EVR renderer first. If so, are there anybody who is familiar at least a little with it? The only thing that bothers me is that EVR is supposed to be used in a DirectShow chain and MPlayer has nothing to do with DirectShow... In short - does anybody know is it feasible to develop the EVR renderer first and test it with the current (non-accelerated) internal MPlayer codecs? 2. Once the EVR custom presenter is ready, FFmpeg already has the needed infrastructure for offloading computations for H.264, VC-1, MPEG-2 and MPEG-4 ASP. Excuse me if I don't get it, but each one of these standards should have an "accelerated" implementation, which from MPlayer's point of view is a new codec. Then inside the codec there are places, where one can hook and transfer the decoding part to the DxVA/VA API/VDAPU at any given stage (IDCT, MO and so on). Is this right? I'm starting to look at the code right now, but a higher abstract point of view is welcome. 3. As far as I understand this approach is used by VA API and VDPAU. Can I reuse their infrastructure as well? On this page I see a VA API patches: http://www.splitted-desktop.com/~gbeauchesne/mplayer-vaapi/ Are they part of MPlayer already or not? 4. Can somebody, who has already worked on VA API/VDPAU implementations give me some clue? How much work is involved in getting the whole chain work? Are most of the puzzle pieces in place or I will have to dig deeper into understanding how H.264 / VC-1 and so on work on a pure codec level? 5. I am trying to figure out a realistic estimate about how much time and hard work this is about, so any help in this direction is welcome. Greeting, Georgi

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[PATCH] Add size based support for -endpos in MPlayer
by Clément Bœsch 11 Jun '11

11 Jun '11

A small patch to add size based support for -endpos in MPlayer. I tested it with random videos, audio only files and -loop option and it seems to work. Anything else I should test? However, I don't understand why mpctx->sh_audio is tested when mpctx->sh_video is NULL; is there a way to call the code around mplayer.c:L3698 without having neither mpctx->sh_video and mpctx->sh_audio? And then, does this mean mpctx->stream could be NULL? -- Clément B. Not sent from a jesusPhone.

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[PATCH] vf_delogo: variable rectangle
by Nicolas George 23 May '11

23 May '11

Hi. The attached patch makes it possible to change the coordinates of the rectangle for the delogo filter, by supplying a subtitle-like file with the times and coordinates. Regards, -- Nicolas George

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[PATCH] Bind to seek to a given percent
by Clément Bœsch 05 May '11

05 May '11

Hi, It's the second time a person tells me he prefers GUI over classic MPlayer because the progress bar allows them to seek to a given position immediately. So I was wondering about making a default bind for this. It seems there is not current solution to bind a combination of keys, just like KEY_CTRL + '1', so I just binded F1 to F9 ('1' to '9' are for most of them already in use). I know this bind is not really good (especially for those using desktop managers) but I didn't find any better. What do you think of this? -- Clément B. Not sent from a jesusPhone.

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Subtitles out-of-sync with 23.976 mkv files with lavf demuxer
by Anssi Hannula 05 Apr '11

05 Apr '11

Hi! Frame-based (microdvd) subtitles currently get out of sync towards the end of 23.976 fps H264 matroska files (some 1-2s in 40min). This doesn't happen with the legacy demuxer (-demuxer mkv). AFAICS this happens because demux_lavf.c uses st->r_frame_rate to determine sh_video->fps and sh_video->frametime, and r_frame_rate is rounded up to 24 fps by av_find_stream_info(). I'm not immediately sure what is the correct solution here, so does someone else know? -- Anssi Hannula

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the great reformatting
by Diego Biurrun 06 Mar '11

06 Mar '11

I've been experimenting with uncrustify for a while now[1]. Unlike all the other code formatters I have tried over the years, most prominently GNU indent, it screws up very little and mostly does the right thing. Plus, the author reacts to bug reports. I have cooked up a suitable K&R style configuration that should work well with MPlayer. I have tested against mplayer.c to my satisfaction, if somebody knows a trickier file, let me know. I'm attaching the config file, it would be suitable to place under TOOLS or so. Grab uncrustify from http://uncrustify.sourceforge.net/ and experiment. I used a git clone from today. So, in short, the time for the great reformatting is finally arriving. Constructive comments are welcome, skip the flaming and bikeshedding please. K&R ftw, Diego [1] Thanks to Clément for help with testing.

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Homepage DOCS needs update
by Ingo Brückl 01 Mar '11

01 Mar '11

How is the update of http://www.mplayerhq.hu/DOCS/ accomplished? Doesn't seem to be in the homepage repository (or I'm blind) and is outdated. Ingo

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[PATCH] Make aa video output workable
by Alexei Ababilov 28 Feb '11

28 Feb '11

Years ago value of force_monitor_aspect variable was 4.0/3.0. Now its default value is 0. It works well (the actual aspect is determined dynamically) with most of video output drivers, but aa becomes unusable (screenshot aa-incorrect.png). The patch sets force_monitor_aspect to 4.0/3.0, if it is not set by user. Also, the old test method for "linux" aa driver checks file named like /dev/vcsa01. Now udev names such files like /dev/vsca1. It is fixed by this patch, too.

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[PATCH] Add a couple of ID_DVD_* messages to stream_dvdnav.c
by Mike Castle 28 Feb '11

28 Feb '11

Add ID_DVD_TITLE_%d_CHAPTERS= and ID_DVD_CURRENT_TITLE= to dvdnav: similar to what exists for dvd:

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