June 2009 - ffmpeg-devel - lists.ffmpeg.org

Yamaha SMAF 'CNTI' chunk is wrong.
by yoshihisa.uchida＠gmail.com 07 Jan '13

07 Jan '13

Hi, ffmpeg developers, For Yamaha SMAF, Contents Info chunk ('CNTI') includes only following members: - Contents Class - Contents Type - Contents Code Type - Copy Status - Copy Counts (see http://smaf-yamaha.com/what/s52.html) But, in the current ffmpeg, 'CNTI' includes metadata ("VN:libavcodec,"). According to SMAF Specifications Optional Data Chunk (http://smaf-yamaha.com/what/s52.html) I corrected that metadata include Optional Data Chunk ('OPDA'). Regards, uchan

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[PATCH] fixup mpegts_get_pcr to be more reliable
by elupus＠ecce.se 14 Sep '11

14 Sep '11

Hi, Here are a few patches i created while trying to figure out why a file "locked" up in mpegts_get_pcr on seek. I don't seem to learn that patches to the mpegts demuxer have a tendency to get lost in the void. Anyway... 0001: The code for backwords pcr searching could never be reached, so remove it. 0002: Respect the maximum stream position that the function is allowed to process. 0003: Make sure the return value of url_seek is respected 0004: Reindent after the above 0005: Make mpegts_get_pcr resync to stream if the position it is asked to look for a timestamp isn't on a mpegts syncword. ---- The real issue I found out later is that this particlar stream doesn't contain any packets with pid = pcr_pid, so it reads the whole file to attempt to find a starting timestamp for av_gen_search. Are the pid's for the pcr supposed to be listed in PMT? I haven't checked this yet, but i suspect the given pid isn't available in there either. Maybe it should be reset to -1 if the pid isn't found? Regards Joakim

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[PATCH] lavfi test pattern generator
by stefano.sabatini-lala＠poste.it 26 Jun '11

26 Jun '11

Hi all, useful for testing, it is based on the test pattern generator by Nicolas George: http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2007-October/036838.html basically I just stripped the audio signal generator and adapted few things to the lavfi framework, so most credit goes to Nicolas. And it would plenty cool to find some way to get ffmpeg/ffplay take as input such a generator, but I still can't see how to do that. What I can do now is to take as input /dev/null, then overlay the test_pattern over it, but this is rather ugly. Regards. -- FFmpeg = Freak and Fierce Mysterious Proud Erratic Gadget

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[FWD] [PATCH] immediate decoding of dvd stills
by nicola_sabbi＠fastwebnet.it 24 Jun '11

24 Jun '11

Some time ago someone posted this small patch to permit decoding dvd still images without setting LOW_DELAY; unfortunately it seems the patch was forgotten Is it ok to commit? If not, what's the right way to proceed?

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[Toy] MS Video 1 encoder
by kostya.shishkov＠gmail.com 04 May '11

04 May '11

Here's a result of sleepless day :). With a small patch to ELBG it was possible to implement simple 15-bit MSVC encoder. At least it can encode more or less recognizable video. Since I have no intentions nor time to polish it, feel free to use it as you like - finish, rework into RPZA encoder, add link to this post to "Interesting patches" on Multimedia Wiki and forget it, whatever. (I should be working on AAC encoder anyway)

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Fwd: framebuffer device demuxer
by giliarde＠gmail.com 12 Mar '11

12 Mar '11

Hi, patch attached. Giliard wrote: > Dear developer, > > Recently I added a extension in the FFmpeg for grab the screen content > of devices which use framebuffer ( see http://www.directfb.org/ ). > I implemented this as a framebuffer device demuxer in the directory > "libavdevice". > I needed modify the files: libavdevice/alldevices.c, > libavdevice/Makefile and configure. > All similar to x11grab. > > If you has interest for included in the FFmpeg source code official, the > attachment contain the files modified and implemented. > First, thanks a lot for your work. Would it be possible for you to send a patch ? (diff -wup) of your tree and send it attached in ffmpeg-devel mailing list ? Thanks a lot. -- Baptiste COUDURIER GnuPG Key Id: 0x5C1ABAAA Key fingerprint 8D77134D20CC9220201FC5DB0AC9325C5C1ABAAA FFmpeg maintainer http://www.ffmpeg.org

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[PATCH] DCA-in-WAV detection
by kostya.shishkov＠gmail.com 26 Jan '11

26 Jan '11

Here is my attempt on patch discussed on Febryary 2006 Thread called "[PATCH] Fix DTS in WAV file playback."

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[PATCH] Apple Video Encoder (rpza)
by ffmpeg.php＠gmail.com 24 Jan '11

24 Jan '11

Attached is a patch to add support for Apple Video encoding (rpza). The quality settings are defined at compile time right now since I wasn't really sure how to map ffmpeg's numerous video options to the capabilities of rpza. It supports all rpza encoding opcodes but the 4-color block encoding doesn't try to do multiblock runs yet. -Todd

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[PATCH]wmv3 encoder
by fortin＠nerim.net 23 Jan '11

23 Jan '11

Hi, The following patch adds a wmv3 encoder (i removed the vc1 encoder because it doesn't generate an elementary stream). I don't think i can split the patch without breaking compilation between two patches. Please comment (particularly the vc1enc.h include in mpegvideo.c). Thanks, Denis

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[Toy] LucasArts SMUSH demuxer and decoder
by kostya.shishkov＠gmail.com 23 Jan '11

23 Jan '11

Again, for the record and not for review. I just took very old patch and extended it to decode palettized LucasArts FMVs from the games like Full Throttle, Curse of Monkey Island, The Dig, etc. I would be glad if somebody pick and finish it (there are minor glitches during decoding and fade in/fade out scenes are rendered as madly flipping frames instead; oh, and the code style is rather bad).

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