December 2005 - ffmpeg-devel - lists.ffmpeg.org

[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

9 20

Read from a buffer instead of a file
by raphaelh＠nist.gov 08 Mar '07

08 Mar '07

Hi, is it possible to read video from a buffer instead of a file with libav(codec/format) ? I have MPEG2-TS video in a buffer, and cannot use "av_open_input_file" and the "av_read_frame" on a buffer, it only works from a file. Anyone has an idea how to do that ? Thanks in advance, --Raphael HUCK

5 10

Possible bug in h264 dec
by francis_labonte＠hotmail.com 23 Jan '07

23 Jan '07

Hi, Runnning valgrind on a file, I got some invlid read. It points to: H264_CHROMA_MC8_TMPL in dsputil_h264_template_mmx.c called by mc_dir_part in h264.c In my opinion, I think it could come from here: if( full_mx < 0-extra_width || full_my < 0-extra_height || full_mx + 16/*FIXME*/ > pic_width + extra_width || full_my + 16/*FIXME*/ > pic_height + extra_height) "<" should become "<=" for the 2 FIXME. An index ( mx, my) ranging from 0-... is compared to a size ranging from 1-,,, Applying my modification fix my invalid. I would like to have have some input to know if my analysis make sens or not! Thank you Francis NOTE: I'me not using the latest version of CVS, but this line didn't change in HEAD, and a friend told me he got similar result with HEAD version.

2 1

SIGSEGV in h264.c, stream is available for debugging
by dario＠ip.tv 23 Jan '07

23 Jan '07

> > I've got a SIGSEGV decoding h264, the stream was generated by x264. > > > The following stream was recorded live and begins from the middle: > > > http://www.datscom.com.br/~dario/dump.SIGSEGV.h264 > > >the following command line reproduces the fault (the source code is updated >from cvs as of 09/05/2005 08:13pm GMT-3). > >$ ./ffmpeg -i dump.SIGSEGV.h264 -f null dump.SIGSEGV.h264.null > Has anyone got any status on that subject? Anyway, I've managed to increase the number of max reference pics (at least from what I could understand from the code), from 16 to 32 in h264.c, and it seems to help a little (the stream above now decodes to the end). btw, nice symbolic constants would be nicer than things like that spread all over the code: for (i = 0; i < 16; i++) ... Picture* delayed_pics[16]; etc... :-) The above stream now decodes ok, but the following one fails with "getbuffer() failed" and consequently (no checks for the getbuffer calls) SIGSEGV. I assume there is some leak somewhere? http://bule.ip.tv/~dario/dump.SIGSEGV.1.h264 Again, I'd appreciate any help on the subject. Regards, Dario Andrade R&D IP.TV

3 2

[PATCH] demuxer for dcinema audio
by Reimar.Doeffinger＠stud.uni-karlsruhe.de 30 Aug '06

30 Aug '06

Hi, I'd like to suggest the attached patch for demuxing D-Cinema audio. It's not exactly beautiful since it does something like decoding (changing the bit order), but I though it to be the easier solution over adding a special decoder (since it isn't used anywhere else). The smil file that came with it said it was of the format "audio/302m", and I assume it is SMPTE 302M uncompressed audio, but I don't have the specs. Please tell me what you think about it... Oh, some samples (I already extended the MPlayer mpeg demuxer to play the gxf file): Address: ftp://www.ropa-net.de Username: web49f4 Password: 123456 Greetings, Reimar D?ffinger

4 18

How to encode videos using libavcodec/libavformat DLLs?
by Lars.Blumberg＠aquasoft.de 20 Jun '06

20 Jun '06

Hello! I want to use the libavcodec/libavformat DLLs to encode a video/sound stream. Therefore I want to put every single frame into the stream. Is there any place where I can find some information about how to do that, may be a sample application, tutorial or something like that? I am programming with Delphi, but I guess als VC++ or VB code would be helpfull. I want to load the DLLs dynamically into the application. Thanks for any comments. Sincerly Lars

3 4

[BUG] libavformat mp3 in mp4 with fourcc mp4a
by tempn＠twmi.rr.com 04 May '06

04 May '06

hello, while checking a sample in mplayer, i came across a libavformat problem libavformat detects 'mp4a' fourcc in mp4 as aac always, but mplayer detects mp4a as mp3 and/or aac when appropriate. you can check the sample at http://home.twmi.rr.com/compn/163.mp4 its 3mb. i have 11mb of the file, or 'the wanderer' has a complete sample. these encodes are made by the kaizoku-fansubs group... the audio plays correctly using mplayer 163.mp4 -demuxer 35 -ac +ffmp3 some mplayer output, the only thing different between an mp4a aac and mp4a mp3 was the elementary stream descriptor atom... > AAC: > MOV track #0: 105 chunks, 948 samples > Audio bits: 16 chans: 2 rate: 44100 > MOV: Found MPEG4 audio Elementary Stream Descriptor atom (51)! > Fourcc: mp4a > > MP3: > MOV track #1: 2886 chunks, 0 samples > Audio bits: 16 chans: 2 rate: 48000 > MOV: Found MPEG4 audio Elementary Stream Descriptor atom (35)! > Fourcc: mp4a verified ffplay detects aac audio. is there a way to force codecs with ffplay? -compn

4 3

mov and libavformat demuxer problem on file
by tempn＠twmi.rr.com 03 May '06

03 May '06

peppo found this movie and reported it to #mplayer http://perso.wanadoo.fr/absy.com/Magmalondres.mov mplayer mov demuxer thinks its a reference mov file Playing Magmalondres.mov. MOV: Reference Media file!!! MOV: Reference Media file!!! Exiting... (End of file) libavformat fouls up the audio somehow? MPlayer Sherpya-MinGW-20051205-4.0.2 (C) 2000-2005 MPlayer Team CommandLine: 'Magmalondres.mov' '-v' '-demuxer' '35' init_freetype get_path('font/font.desc') -> 'C:/programs/mplayer/mplayer/font/font.desc' font: can't open file: C:/programs/mplayer/mplayer/font/font.desc font: can't open file: /usr/share/mplayer/font/font.desc Using MMX Optimized OnScreenDisplay Using Windows native timing get_path('input.conf') -> 'C:/programs/mplayer/mplayer/input.conf' Parsing input config file C:/programs/mplayer/mplayer/input.conf Input config file C:/programs/mplayer/mplayer/input.conf parsed: 53 binds [GUI] Gui Thread started get_path('J:\Magmalondres.mov.conf') -> 'C:/programs/mplayer/mplayer/J:\Magmalon dres.mov.conf' [GUI] Adding video filter: screenshot Playing J:\Magmalondres.mov. get_path('sub/') -> 'C:/programs/mplayer/mplayer/sub/' WINSOCK2 init: 0 [file] File size is 24660479 bytes STREAM: [file] J:\Magmalondres.mov STREAM: Description: File STREAM: Author: Albeu STREAM: Comment: based on the code from ??? (probably Arpi) LAVF_check: QuickTime/MPEG4 format libavformat file format detected. ==> Found audio stream: 0 ======= WAVE Format ======= Format Tag: 28781 (0x706D) Channels: 0 Samplerate: 96000 avg byte/sec: 0 Block align: 0 bits/sample: 16 cbSize: 83 Unknown extra header dump: [0] [0] [0] [c] [66] [72] [6d] [61] [6d] [70] [34] [6 1] [0] [0] [0] [c] [6d] [70] [34] [61] [0] [0] [0] [0] [0] [0] [0] [33] [65] [73 ] [64] [73] [0] [0] [0] [0] [3] [80] [80] [80] [22] [0] [0] [0] [4] [80] [80] [8 0] [14] [40] [15] [0] [18] [0] [0] [1] [f4] [0] [0] [1] [f4] [0] [5] [80] [80] [ 80] [2] [12] [10] [6] [80] [80] [80] [1] [2] [0] [0] [0] [8] [0] [0] [0] [0] =========================== ==> Found video stream: 1 ======= VIDEO Format ====== biSize 72 biWidth 320 biHeight 180 biPlanes 0 biBitCount 24 biCompression 1446269005='MP4V' biSizeImage 172800 Unknown extra header dump: [0] [0] [1] [b0] [f3] [0] [0] [1] [b5] [e] [e0] [40] [c0] [cf] [0] [0] [1] [0] [0] [0] [1] [20] [0] [84] [40] [fa] [28] [50] [20] [b4 ] [a2] [1f] =========================== LAVF: 1 audio and 1 video streams found LAVF: build 3211776 VIDEO: [MP4V] 320x180 24bpp 2500.000 fps 0.0 kbps ( 0.0 kbyte/s) [V] filefmt:35 fourcc:0x5634504D size:320x180 fps:2500.00 ftime:=0.0004 get_path('sub/') -> 'C:/programs/mplayer/mplayer/sub/' get_path('default.sub') -> 'C:/programs/mplayer/mplayer/default.sub' ========================================================================== Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding) dec_audio: Allocating 4608 bytes for input buffer. dec_audio: Allocating 49152 + 65536 = 114688 bytes for output buffer. FAAD: Failed to initialize the decoder! ADecoder init failed :( ADecoder init failed :( [GUI] MessageBox: Cannot find codec for audio format 0x6134706D. Cannot find codec for audio format 0x6134706D. Read DOCS/HTML/en/codecs.html! ========================================================================== <vo_directx><INFO>checking primary surface <vo_directx><FORMAT PRIMARY>14 BGR32 supported <vo_directx><INFO>testing supported overlay pixelformats <vo_directx><FORMAT OVERLAY>0 YV12 supported <vo_directx><FORMAT OVERLAY>1 I420 not supported <vo_directx><FORMAT OVERLAY>2 IYUV not supported <vo_directx><FORMAT OVERLAY>3 YVU9 supported <vo_directx><FORMAT OVERLAY>4 YUY2 supported <vo_directx><FORMAT OVERLAY>5 UYVY supported <vo_directx><FORMAT OVERLAY>6 BGR8 not supported <vo_directx><FORMAT OVERLAY>7 RGB15 not supported <vo_directx><FORMAT OVERLAY>8 BGR15 not supported <vo_directx><FORMAT OVERLAY>9 RGB16 not supported <vo_directx><FORMAT OVERLAY>10 BGR16 not supported <vo_directx><FORMAT OVERLAY>11 RGB24 not supported <vo_directx><FORMAT OVERLAY>12 BGR24 not supported <vo_directx><FORMAT OVERLAY>13 RGB32 not supported <vo_directx><FORMAT OVERLAY>14 BGR32 not supported <vo_directx><INFO>Your card supports 4 of 15 overlayformats <vo_directx><INFO>can mirror up down <vo_directx><INFO>hardware supports overlay Opening video filter: [screenshot] ========================================================================== Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family INFO: libavcodec init OK! Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4) ========================================================================== Audio: no sound Freeing 0 unused audio chunks. Starting playback... [ffmpeg] aspect_ratio: 1.777778 VDec: vo config request - 320 x 180 (preferred colorspace: Planar YV12) Trying filter chain: screenshot vo VDec: using Planar YV12 as output csp (no 0) Movie-Aspect is 1.78:1 - prescaling to correct movie aspect. VO Config (320x180->320x180,flags=0,'MPlayer',0x32315659) SwScaler: using unscaled Planar YV12 -> BGR 24-bit special converter REQ: flags=0x417 req=0x0 VO: [directx] 320x180 => 320x180 Planar YV12 VO: Description: Directx DDraw YUV/RGB/BGR renderer VO: Author: Sascha Sommer <saschasommer at freenet.de> <vo_directx><INFO>using singlebuffer overlay *** [vo] Allocating (slices) mp_image_t, 320x192x12bpp YUV planar, 92160 bytes *** [screenshot] Allocating (slices) mp_image_t, 320x192x12bpp YUV planar, 92160 bytes *** [vo] Allocating (slices) mp_image_t, 320x192x12bpp YUV planar, 92160 bytes *** [screenshot] Allocating (slices) mp_image_t, 320x192x12bpp YUV planar, 92160 bytes get_path('subfont.ttf') -> 'C:/programs/mplayer/mplayer/subfont.ttf' Unicode font: 584 glyphs. [mpeg4 @ 0090AAE8]slice end not reached but screenspace end (74316 left 700020, score= -16) [mpeg4 @ 0090AAE8]concealing 240 DC, 240 AC, 240 MV errors V: 2.6 80/ 80 ??% ??% ??,?% 0 0 ===== PAUSE ===== xine is reported not to work vlc is reported to work, but to file a bug report [00000276] mp4 demuxer error: unknown ref type=alis FIXME (send a bug report) -compn

3 3

[PATCH]: Too much alignment assumed by H264 decoder
by davem＠davemloft.net 09 Mar '06

09 Mar '06

These uint64_t cast memory operations cause unaligned accesses on platforms such as Sparc, there really isn't anything in the datastructures to ensure this level of alignment. But uint32_t seems to work fine, as the following patch against current CVS implements. Please consider for inclusion, thanks. --- libavcodec/h264.c.~1~ 2005-12-22 08:16:17.000000000 -0800 +++ libavcodec/h264.c 2005-12-22 08:20:59.000000000 -0800 @@ -1407,14 +1407,18 @@ if(!USES_LIST(mb_type, list)){ if(1){ //FIXME skip or never read if mb_type doesn't use it for(y=0; y<4; y++){ - *(uint64_t*)s->current_picture.motion_val[list][b_xy + 0 + y*h->b_stride]= - *(uint64_t*)s->current_picture.motion_val[list][b_xy + 2 + y*h->b_stride]= 0; + *(uint32_t*)s->current_picture.motion_val[list][b_xy + 0 + y*h->b_stride]= + *(uint32_t*)s->current_picture.motion_val[list][b_xy + 1 + y*h->b_stride]= + *(uint32_t*)s->current_picture.motion_val[list][b_xy + 2 + y*h->b_stride]= + *(uint32_t*)s->current_picture.motion_val[list][b_xy + 3 + y*h->b_stride]= 0; } if( h->pps.cabac ) { /* FIXME needed ? */ for(y=0; y<4; y++){ - *(uint64_t*)h->mvd_table[list][b_xy + 0 + y*h->b_stride]= - *(uint64_t*)h->mvd_table[list][b_xy + 2 + y*h->b_stride]= 0; + *(uint32_t*)h->mvd_table[list][b_xy + 0 + y*h->b_stride]= + *(uint32_t*)h->mvd_table[list][b_xy + 1 + y*h->b_stride]= + *(uint32_t*)h->mvd_table[list][b_xy + 2 + y*h->b_stride]= + *(uint32_t*)h->mvd_table[list][b_xy + 3 + y*h->b_stride]= 0; } } for(y=0; y<2; y++){ @@ -1426,13 +1430,17 @@ } for(y=0; y<4; y++){ - *(uint64_t*)s->current_picture.motion_val[list][b_xy + 0 + y*h->b_stride]= *(uint64_t*)h->mv_cache[list][scan8[0]+0 + 8*y]; - *(uint64_t*)s->current_picture.motion_val[list][b_xy + 2 + y*h->b_stride]= *(uint64_t*)h->mv_cache[list][scan8[0]+2 + 8*y]; + *(uint32_t*)s->current_picture.motion_val[list][b_xy + 0 + y*h->b_stride]= *(uint32_t*)h->mv_cache[list][scan8[0]+0 + 8*y]; + *(uint32_t*)s->current_picture.motion_val[list][b_xy + 1 + y*h->b_stride]= *(uint32_t*)h->mv_cache[list][scan8[0]+1 + 8*y]; + *(uint32_t*)s->current_picture.motion_val[list][b_xy + 2 + y*h->b_stride]= *(uint32_t*)h->mv_cache[list][scan8[0]+2 + 8*y]; + *(uint32_t*)s->current_picture.motion_val[list][b_xy + 3 + y*h->b_stride]= *(uint32_t*)h->mv_cache[list][scan8[0]+3 + 8*y]; } if( h->pps.cabac ) { for(y=0; y<4; y++){ - *(uint64_t*)h->mvd_table[list][b_xy + 0 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+0 + 8*y]; - *(uint64_t*)h->mvd_table[list][b_xy + 2 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+2 + 8*y]; + *(uint32_t*)h->mvd_table[list][b_xy + 0 + y*h->b_stride]= *(uint32_t*)h->mvd_cache[list][scan8[0]+0 + 8*y]; + *(uint32_t*)h->mvd_table[list][b_xy + 1 + y*h->b_stride]= *(uint32_t*)h->mvd_cache[list][scan8[0]+1 + 8*y]; + *(uint32_t*)h->mvd_table[list][b_xy + 2 + y*h->b_stride]= *(uint32_t*)h->mvd_cache[list][scan8[0]+2 + 8*y]; + *(uint32_t*)h->mvd_table[list][b_xy + 3 + y*h->b_stride]= *(uint32_t*)h->mvd_cache[list][scan8[0]+3 + 8*y]; } } for(y=0; y<2; y++){

10 21

FFMPEG on Windows
by kirantulasi＠rediffmail.com 27 Feb '06

27 Feb '06

Hi, I need to build ffmpeg on Windows. I find that it is currently available on Linux. There were some instructions for building it on Windows by using MinSYS and MinGW but I had a tough time in making use of them for this purpose. Can anyone of you tell me if there is a MSVC workspace (*.dsw) or a project (*.dsp) available which I can use directly? I tried building a MSVC workspace using the ffmpeg files but I found that many files have main() and I was not sure how to build them. Another thing I would like to know is can I find a complete list of codecs (audio and video) which are supported by the container formats AVI, ASF and MPG? I need to build a transcoder which can take inputs in these container formats. Thanks in advance, Kiran

12 16