December 2006 - ffmpeg-devel - lists.ffmpeg.org

[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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[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] Vorbis I floor type 0 support
by eclipse7＠gmx.net 16 Mar '08

16 Mar '08

Hi, i extended the ffmpeg vorbis decoder to decode vorbis floor0 files. It is my first try at this kind of stuff. I only had one sample tho testing wasn't too exhaustive. I tested the code on linux x86 and Solaris SPARC so far. As always comments and testers welcome. Have fun, Alex (beastd)

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ID3v2
by andreas＠olebyn.nu 22 May '07

22 May '07

Hi I've written a tentative patch that adds ID3v2.[234] reading and ID3v2.4 writing to the mp3 (de)muxer. I've tested it together with xmms and itunes. I'd say the primary reasons for using ID3v2 is: * It's located at the beginning of the file (obviously a benefit when streaming) * It supports strings > 30 chars Comments welcome. While at it, I renamed some stuff to better reflect what ID3-version it is used for. Perhaps I should submit that as a separate patch?

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[BUG] matroska demuxer
by baptiste.coudurier＠smartjog.com 21 Apr '07

21 Apr '07

Hi x264_no-b-frames.mkv in incoming lavf demuxer does not recognize the stream, while mplayer does: ffmpeg -i x264_no-b-frames.mkv Input #0, matroska, from 'x264_no-b-frames.mkv': Duration: 00:00:40.2, bitrate: N/A Must supply at least one output file If someone is motivated to check. -- Baptiste COUDURIER GnuPG Key Id: 0x5C1ABAAA SMARTJOG S.A. http://www.smartjog.com Key fingerprint 8D77134D20CC9220201FC5DB0AC9325C5C1ABAAA Phone: +33 1 49966312

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matroska to vob frame skipping issue.
by chris＠garveycocker.com 04 Apr '07

04 Apr '07

Hi, I have been struggling with trying to encode matroska files (AC3 and h264 streams) to vobs. The encoding takes place but the resultant file plays very jerky. It is like only every other frame is been encoded. This happens for me on about 90% of such files. I have uploaded an example of this issue - lots of panning which illustrates the problem very well: ftp://upload.mplayerhq.hu/MPlayer/incoming/matroska-to-vob-skipping Here is my command line: ffmpeg -i planet.earth.mkv -target dvd planet.earth.mpg FFmpeg version SVN-r7159, Copyright (c) 2000-2006 Fabrice Bellard, et al. configuration: --enable-a52 --enable-gpl --enable-memalign-hack --disable-debug libavutil version: 49.1.0 libavcodec version: 51.25.0 libavformat version: 51.6.0 built on Nov 23 2006 10:04:43, gcc: 3.4.4 (mingw special) [matroska @ 00709434]Ignoring seekhead entry for ID=0x1549a966 [matroska @ 00709434]Ignoring seekhead entry for ID=0x1654ae6b [matroska @ 00709434]Ignoring seekhead entry for ID=0x114d9b74 [matroska @ 00709434]Unknown entry 0x73a4 in info header [matroska @ 00709434]Unknown track header entry 0x55aa - ignoring [matroska @ 00709434]Unknown track header entry 0x23314f - ignoring [matroska @ 00709434]Unknown track header entry 0x55ee - ignoring [matroska @ 00709434]Unknown track header entry 0xaa - ignoring [matroska @ 00709434]Unknown track header entry 0x55aa - ignoring [matroska @ 00709434]Unknown track header entry 0x23314f - ignoring [matroska @ 00709434]Unknown track header entry 0x55ee - ignoring [matroska @ 00709434]Unknown track header entry 0xaa - ignoring Input #0, matroska, from 'planet.earth.mkv': Duration: 00:01:02.3, bitrate: N/A Stream #0.0: Audio: ac3, 48000 Hz, 5:1 Stream #0.1: Video: h264, yuv420p, 1280x720, 25.00 fps(r) Assuming PAL for target. Output #0, dvd, to 'planet.earth.mpg': Stream #0.0: Video: mpeg2video, yuv420p, 720x576, q=2-31, 6000 kb/s, 25.00 fps(c) Stream #0.1: Audio: ac3, 48000 Hz, 5:1, 448 kb/s Stream mapping: Stream #0.1 -> #0.0 Stream #0.0 -> #0.1 Press [q] to stop encoding frame= 1557 q=2.0 Lsize= 29646kB time=62.2 bitrate=3902.0kbits/s video:14759kB audio:3404kB global headers:0kB muxing overhead 63.221013% Is this a know issue or a bug? Thanks, Chris

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[PATCH] lpcm 20 and 24 bit support in MPEG PS
by baptiste.coudurier＠smartjog.com 04 Apr '07

04 Apr '07

Hi This patch add support for 20bit and 24bit lpcm in MPEG PS. There are 4 cases, I dunno if factorizing code is worth, It did not look cleaner, I'm not sure though. Vob samples with 20bit, 24bit, multi channel and mono pcm can be found here: http://www.videohelp.com/~jsoto/AudioTests/ -- Baptiste COUDURIER GnuPG Key Id: 0x5C1ABAAA SMARTJOG S.A. http://www.smartjog.com Key fingerprint 8D77134D20CC9220201FC5DB0AC9325C5C1ABAAA Phone: +33 1 49966312

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alsa input / output
by lucabe72＠email.it 27 Mar '07

27 Mar '07

Hi all, I wrote a small AVOutputFormat and AVInputFormat for supporting alsa through alsalib. It is not perfect yet, and still has some bugs (A/V synchronization might be incorrect because timestamps generation is very naive, endianess is not correctly handled, only 16bit samples are currently supported, etc...). But it is already usable (I tried to capture an avi from video4linux2/alsa, and I had no xruns and audio and video look in synch). Is anyone interested in this alsa format? If yes, I can send it to the list so that interested people can try it, and improve or fix it (in its current form, I do not know if it can be submitted for inclusion...) Also, just for the fun of it I am thinking about accessing alsa without using alsalib (by directly accessing /dev/snd/*). Does anyone know where can I find some documentation about the "raw" /dev/snd/* interface? Thanks, Luca -- _____________________________________________________________________________ Copy this in your signature, if you think it is important: N O W A R ! ! !

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[PATCH] Remove extra parameter in printf()-like function
by flameeyes＠gentoo.org 18 Mar '07

18 Mar '07

As per subject, this occurrence was uncovered after the patch previously submitted. I have some other fixes I'm going to send now, but this has probably a different importance, at least to my eyes. -- Diego "Flameeyes" Petten? - http://farragut.flameeyes.is-a-geek.org/ Gentoo/Alt lead, Gentoo/FreeBSD, Video, AMD64, Sound, PAM, KDE

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[PATCH] Add missing __format__ attributes where missing
by flameeyes＠gentoo.org 18 Mar '07

18 Mar '07

As per summary, this patch adds a few __format__ attribute where missing, thanks to -Wmissing-format-attributes . -- Diego "Flameeyes" Petten? - http://farragut.flameeyes.is-a-geek.org/ Gentoo/Alt lead, Gentoo/FreeBSD, Video, AMD64, Sound, PAM, KDE

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