April 2007 - ffmpeg-user - lists.ffmpeg.org

Frame sizes
by estelasousavieira＠hotmail.com 31 Oct '07

31 Oct '07

I need to obtain the sizes of the I, P and B frames of the video of a DVD. Is this possible with ffmpeg? _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/

2 3

VFW Capture support
by ramiro＠lisha.ufsc.br 23 Oct '07

23 Oct '07

Hello, First attempt for VFW capture support in Windows. For testing purposes only! Enable it with: ./configure --enable-memalign-hack --enable-vfw-cap It prints lots of (somewhat useless) debug messages. Image is upside down =). I just have to find the right PIX_FMT and width/height... I'm way too tired to look at that now. Note: Run this FFmpeg from Windows' command prompts (cmd or command)! *Not MSys!*. This patch includes the patch I sent to ffmpeg-devel for interactive support for Windows. You must kill it with 'q' or Ctrl+C, or else the capture device won't be released, and you'll have to reboot Windows to get it back. MSys doesn't capture 'q' nor Ctrl+C, so it's doomed to make you loose control of the device. Ramiro Polla

9 11

ffmpeg ffsvq3 codec cannot decode video in .mov file
by sergemp＠mail.ru 05 Aug '07

05 Aug '07

Hello, ffmpeg-user. Initially it was an mplayer issue. But as far as it's related to ffmpeg codec I was suggested to write here. I tried to play with mplayer this file: http://www.iwamamoscow.ru/i/video/other/mountaindew_seagal.mov size: 4895360 It's played fine with -vfm qtvideo. In that case it's played with: Selected video codec: [qtsvq3] vfm: qtvideo (Win32/QuickTime SVQ3 decoder) Selected audio codec: [ffqdm2] afm: ffmpeg (FFmpeg QDM2 audio decoder) But without that switch mplayer tries to use ffsvq3 codec. And it prints a lot of errors instead of video (see log below). I've also rechecked it with first ffmpeg.exe that I found: ffmpeg.exe -i mounta~1.mov out.avi Start of ffmpeg log (stderr only - it prints everything to stderr somewhy): ========================================================================== FFmpeg version SVN-r8564, Copyright (c) 2000-2007 Fabrice Bellard, et al. configuration: --enable-gpl --enable-pp --enable-swscaler --enable-pthreads --enable-liba52 --enable-avisynth --enable-libdts --enable-libfaac --enable-libfaad --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libogg --enable-libtheora --enable-libvorbis --enable-x264 --enable-xvid --enable-amr_nb --enable-amr_wb --cpu=i686 --enable-memalign-hack --extra-ldflags=-static libavutil version: 49.4.0 libavcodec version: 51.40.2 libavformat version: 51.11.0 built on Mar 31 2007 16:35:11, gcc: 4.3.0 20070126 (experimental) Seems stream 0 codec frame rate differs from container frame rate: 2997.00 (2997/1) -> 29.97 (30000/1001) Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'mounta~1.mov': Duration: 00:01:00.5, start: 0.000000, bitrate: 647 kb/s Stream #0.0(eng): Video: svq3, yuv420p, 320x240, 29.97 fps(r) Stream #0.1(eng): Audio: qdm2, 44100 Hz, mono Stream #0.2(eng): Video: mjpeg, yuvj444p, 320x240, 15.00 fps(r) Output #0, avi, to 'out.avi': Stream #0.0: Video: mpeg4, yuv420p, 320x240, q=2-31, 200 kb/s, 15.00 fps(c) Stream #0.1: Audio: mp2, 44100 Hz, mono, 64 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 [mpeg4 @ 009D4840]removing common factors from framerate Press [q] to stop encoding [svq3 @ 009D4840]luma prediction:2544 [svq3 @ 009D4840]error while decoding MB 0 0 Error while decoding stream #0.0 [svq3 @ 009D4840]luma prediction:1760 [svq3 @ 009D4840]error while decoding MB 0 0 Error while decoding stream #0.0 [svq3 @ 009D4840]top block unavailable for requested intra mode at 5 0 [svq3 @ 009D4840]check_intra_pred_mode = -1 [svq3 @ 009D4840]error while decoding MB 5 0 Error while decoding stream #0.0 [svq3 @ 009D4840]unsupported slice header (FF) Error while decoding stream #0.0 [svq3 @ 009D4840]left block unavailable for requested intra mode at 0 0 [svq3 @ 009D4840]check_intra_pred_mode = -1 [svq3 @ 009D4840]error while decoding MB 0 0 Error while decoding stream #0.0 [svq3 @ 009D4840]left block unavailable for requested intra mode at 0 0 [svq3 @ 009D4840]check_intra_pred_mode = -1 [svq3 @ 009D4840]error while decoding MB 0 0 Error while decoding stream #0.0 [svq3 @ 009D4840]error while decoding MB 0 0 Error while decoding stream #0.0 [svq3 @ 009D4840]top block unavailable for requested intra mode at 3 0 [svq3 @ 009D4840]check_intra_pred_mode = -1 [svq3 @ 009D4840]error while decoding MB 3 0 Error while decoding stream #0.0 [svq3 @ 009D4840]unsupported slice header (FF) Error while decoding stream #0.0 [svq3 @ 009D4840]top block unavailable for requested intra mode at 3 0 [svq3 @ 009D4840]check_intra_pred_mode = -1 [svq3 @ 009D4840]error while decoding MB 3 0 Error while decoding stream #0.0 [svq3 @ 009D4840]top block unavailable for requested intra mode at 3 0 [svq3 @ 009D4840]check_intra_pred_mode = -1 [svq3 @ 009D4840]error while decoding MB 3 0 Error while decoding stream #0.0 [svq3 @ 009D4840]top block unavailable for requested intra mode at 3 0 [svq3 @ 009D4840]check_intra_pred_mode = -1 [svq3 @ 009D4840]error while decoding MB 3 0 Error while decoding stream #0.0 [svq3 @ 009D4840]top block unavailable for requested intra mode at 4 0 [svq3 @ 009D4840]check_intra_pred_mode = -1 [svq3 @ 009D4840]error while decoding MB 4 0 Error while decoding stream #0.0 ... ========================================================================== Start of mplayer log (stderr only): ========================================================================== [svq3 @ 00CB5670]luma prediction:2544 [svq3 @ 00CB5670]error while decoding MB 0 0 Error while decoding frame! [svq3 @ 00CB5670]luma prediction:1760 [svq3 @ 00CB5670]error while decoding MB 0 0 Error while decoding frame! [svq3 @ 00CB5670]top block unavailable for requested intra mode at 5 0 [svq3 @ 00CB5670]check_intra_pred_mode = -1 [svq3 @ 00CB5670]error while decoding MB 5 0 Error while decoding frame! [svq3 @ 00CB5670]unsupported slice header (FF) Error while decoding frame! [svq3 @ 00CB5670]left block unavailable for requested intra mode at 0 0 [svq3 @ 00CB5670]check_intra_pred_mode = -1 [svq3 @ 00CB5670]error while decoding MB 0 0 Error while decoding frame! [svq3 @ 00CB5670]left block unavailable for requested intra mode at 0 0 [svq3 @ 00CB5670]check_intra_pred_mode = -1 [svq3 @ 00CB5670]error while decoding MB 0 0 Error while decoding frame! [svq3 @ 00CB5670]error while decoding MB 0 0 Error while decoding frame! [svq3 @ 00CB5670]top block unavailable for requested intra mode at 3 0 [svq3 @ 00CB5670]check_intra_pred_mode = -1 [svq3 @ 00CB5670]error while decoding MB 3 0 Error while decoding frame! ... ========================================================================== Start of mplayer log (stdout only): ========================================================================== MPlayer Sherpya-SVN-r22870-4.1.2 (C) 2000-2007 MPlayer Team CPU: Intel(R) Pentium(R) 4 CPU 2.80GHz (Family: 15, Model: 2, Stepping: 9) CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1 Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2 get_path('codecs.conf') -> 'E:/MPLAYER/NETFARM/MPLAYER/mplayer/codecs.conf' Reading E:/MPLAYER/NETFARM/MPLAYER/mplayer/codecs.conf: Can't open 'E:/MPLAYER/NETFARM/MPLAYER/mplayer/codecs.conf': No such file or directory Reading /usr/etc/mplayer/codecs.conf: Can't open '/usr/etc/mplayer/codecs.conf': No such file or directory Using built-in default codecs.conf. Configuration: --prefix=/usr --language=all --enable-win32dll --enable-static --enable-qtx --enable-real --enable-md5sum --enable-menu --disable-vidix-internal --disable-sdl --enable-caca --enable-gl --enable-matrixview --enable-freetype --enable-png --enable-jpeg --enable-gif --enable-tga --enable-mad --disable-tv --disable-dvb --disable-dvbhead --with-extraincdir=/j/Devel/mplayer/live --flavor=p4 CommandLine: '-ao' 'win32' '-v' 'mounta~1.mov' init_freetype get_path('font/font.desc') -> 'E:/MPLAYER/NETFARM/MPLAYER/mplayer/font/font.desc' font: can't open file: E:/MPLAYER/NETFARM/MPLAYER/mplayer/font/font.desc font: can't open file: /usr/share/mplayer/font/font.desc Using MMX (with tiny bit MMX2) Optimized OnScreenDisplay get_path('fonts') -> 'E:/MPLAYER/NETFARM/MPLAYER/mplayer/fonts' Using Windows native timing get_path('input.conf') -> 'E:/MPLAYER/NETFARM/MPLAYER/mplayer/input.conf' Parsing input config file E:/MPLAYER/NETFARM/MPLAYER/mplayer/input.conf Input config file E:/MPLAYER/NETFARM/MPLAYER/mplayer/input.conf parsed: 42 binds get_path('mounta~1.mov.conf') -> 'E:/MPLAYER/NETFARM/MPLAYER/mplayer/mounta~1.mov.conf' Playing mounta~1.mov. get_path('sub/') -> 'E:/MPLAYER/NETFARM/MPLAYER/mplayer/sub/' WINSOCK2 init: 0 [file] File size is 4895360 bytes STREAM: [file] mounta~1.mov STREAM: Description: File STREAM: Author: Albeu STREAM: Comment: based on the code from ??? (probably Arpi) Checking for YUV4MPEG2 ASF_check: not ASF guid! Checking for NuppelVideo Checking for REAL Checking for SMJPEG Searching demuxer type for filename mounta~1.mov ext: .mov Trying demuxer 7 based on filename extension Checking for MOV MOV: Movie header found! MOV: 'WIDE' chunk found! MOV: Movie DATA found! Quicktime/MOV file format detected. MOV: Movie header (100 bytes): tscale=2997 dur=181599 -------------- MOV: Track #0: MOV: Track header! tkhd len=84 ver=0 flags=0x0 id=1 dur=181399 lay=0 vol=0 MOV: Edit atom! MOV: Edit list table (1 entries) (ver:0,flags:0) MOV: entry#0: duration: 181399 start time: 0 speed: 1.0x MOV: Media stream! MOV: Media header! MOV: Handler header: mhlr/vide (appl) Apple Video Media Handler MOV: Media info! MOV: Video header! MOV: Handler header: dhlr/alis (appl) Apple Alias Data Handler MOV: unknown chunk: dinf 28 MOV: Sample info! MOV: Description list! (cnt:1) MOV: desc #0: SVQ3 (1723 bytes) MOV: Sample duration table! (2 blocks) MOV: Syncing samples (keyframes) table! (48 entries) (ver:0,flags:0) MOV: Sample->Chunk mapping table! (243 blocks) (ver:0,flags:0) MOV: Sample size table! (entries=1814 ss=0) (ver:0,flags:0) MOV: Chunk offset table! (243 chunks) MOV track #0: 243 chunks, 1814 samples pts=181399 scale=2997 time=60.527 EL#0: pts=0 1st_sample=0 frames=1814 (60.527s) pts_offs=0 ==> Found video stream: 0 MOV: Found unknown movie atom SMI (1649)! Image size: 320 x 240 (24 bpp) Display size: 320 x 240 Fourcc: SVQ3 Codec: 'Sorenson Video 3' -------------- MOV: Track #1: MOV: Track header! tkhd len=84 ver=0 flags=0x0 id=2 dur=181212 lay=0 vol=256 MOV: Edit atom! MOV: Edit list table (1 entries) (ver:0,flags:0) MOV: entry#0: duration: 181212 start time: 0 speed: 1.0x MOV: Media stream! MOV: Media header! MOV: Handler header: mhlr/soun (appl) Apple Sound Media Handler MOV: Media info! MOV: Sound header! MOV: Handler header: dhlr/alis (appl) Apple Alias Data Handler MOV: unknown chunk: dinf 28 MOV: Sample info! MOV: Description list! (cnt:1) MOV: desc #0: QDM2 (100 bytes) MOV: Sample duration table! (1 blocks) MOV: Sample->Chunk mapping table! (92 blocks) (ver:0,flags:0) MOV: Sample size table! (entries=2666496 ss=1) (ver:0,flags:0) MOV: Chunk offset table! (121 chunks) MOV track #1: 121 chunks, 0 samples pts=2666496 scale=44100 time=60.465 ==> Found audio stream: 1 Audio bits: 16 chans: 1 rate: 44100 Audio header: samp/pack=4096 bytes/pack=556 bytes/frame=556 bytes/samp=2 Audio extra header: len=64 fcc=0x77617665 MOV: Found unknown audio atom Fourcc: QDM2 -------------- MOV: Track #2: MOV: Track header! tkhd len=84 ver=0 flags=0x0 id=3 dur=181599 lay=0 vol=0 MOV: Edit atom! MOV: Edit list table (2 entries) (ver:0,flags:0) MOV: entry#0: duration: 181399 start time: -1 speed: 1.0x MOV: entry#1: duration: 200 start time: 0 speed: 1.0x MOV: Media stream! MOV: Media header! MOV: Handler header: mhlr/vide (appl) Apple Video Media Handler MOV: Media info! MOV: Video header! MOV: Handler header: dhlr/alis (appl) Apple Alias Data Handler MOV: unknown chunk: dinf 28 MOV: Sample info! MOV: Description list! (cnt:1) MOV: desc #0: jpeg (70 bytes) MOV: Sample duration table! (1 blocks) MOV: Sample->Chunk mapping table! (1 blocks) (ver:0,flags:0) MOV: Sample size table! (entries=1 ss=38316) (ver:0,flags:0) MOV: Chunk offset table! (1 chunks) MOV track #2: 1 chunks, 0 samples pts=40 scale=600 time=0.067 EL#1: pts=0 1st_sample=0 frames=1 (0.067s) pts_offs=0 ==> Found video stream: 2 MOV: Initial Video-Delay: 60.527 sec Image size: 320 x 240 (24 bpp) Display size: 320 x 240 Fourcc: jpeg Codec: 'Photo - JPEG' -------------- Quicktime Clip Info: MOV: longest streams: A: #1 (121 samples) V: #0 (1814 samples) VIDEO: [SVQ3] 320x240 24bpp 29.970 fps 0.0 kbps ( 0.0 kbyte/s) [V] filefmt:7 fourcc:0x33515653 size:320x240 fps:29.97 ftime:=0.0334 get_path('sub/') -> 'E:/MPLAYER/NETFARM/MPLAYER/mplayer/sub/' <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 decoder: [ffmpeg] FFmpeg's libavcodec codec family INFO: libavcodec init OK! Selected video codec: [ffsvq3] vfm: ffmpeg (FFmpeg Sorenson Video v3 (SVQ3)) ========================================================================== ========================================================================== Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders dec_audio: Allocating 192000 + 65536 = 257536 bytes for output buffer. FFmpeg's libavcodec audio codec [qdm2 @ 00CB5670]size: 36 init done INFO: libavcodec init OK! [qdm2 @ 00CB5670]decode(3336): 0169626C[556] -> 01631744[512] Superblock follows Subpacket: type=2 size=553 start_offs=3 Subpacket: type=9 size=25 start_offs=4 Subpacket: type=23 size=1 start_offs=1f Subpacket: type=22 size=50 start_offs=22 Subpacket: type=21 size=98 start_offs=56 Subpacket: type=20 size=138 start_offs=ba Subpacket: type=19 size=222 start_offs=146 Subpacket: type=0 size=0 start_offs=225 AUDIO: 44100 Hz, 1 ch, s16le, 47.9 kbit/6.79% (ratio: 5986->88200) Selected audio codec: [ffqdm2] afm: ffmpeg (FFmpeg QDM2 audio decoder) ========================================================================== Building audio filter chain for 44100Hz/1ch/s16le -> 0Hz/0ch/??... [libaf] Adding filter dummy [dummy] Was reinitialized: 44100Hz/1ch/s16le [dummy] Was reinitialized: 44100Hz/1ch/s16le ao_win32: Samplerate:44100Hz Channels:1 Format:s16le ao_win32: Buffersize:2048 AO: [win32] 44100Hz 1ch s16le (2 bytes per sample) AO: Description: Windows waveOut audio output AO: Author: Sascha Sommer <saschasommer at freenet.de> Building audio filter chain for 44100Hz/1ch/s16le -> 44100Hz/1ch/s16le... [dummy] Was reinitialized: 44100Hz/1ch/s16le [dummy] Was reinitialized: 44100Hz/1ch/s16le Starting playback... [qdm2 @ 00CB5670]decode(3336): 0169626C[556] -> 01631944[512] [qdm2 @ 00CB5670]decode(3336): 0169626C[556] -> 01631B44[512] [qdm2 @ 00CB5670]decode(3336): 0169626C[556] -> 01631D44[512] [qdm2 @ 00CB5670]decode(3336): 0169626C[556] -> 01631F44[512] [qdm2 @ 00CB5670]decode(3336): 0169626C[556] -> 01632144[512] [qdm2 @ 00CB5670]decode(3336): 0169626C[556] -> 01632344[512] [qdm2 @ 00CB5670]decode(3336): 0169626C[556] -> 01632544[512] [qdm2 @ 00CB5670]decode(3336): 0169626C[556] -> 01632744[512] [qdm2 @ 00CB5670]decode(3336): 0169626C[556] -> 01632944[512] [qdm2 @ 00CB5670]decode(3336): 0169626C[556] -> 01632B44[512] [qdm2 @ 00CB5670]decode(3336): 0169626C[556] -> 01632D44[512] [qdm2 @ 00CB5670]decode(3336): 0169626C[556] -> 01632F44[512] [qdm2 @ 00CB5670]decode(3336): 0169626C[556] -> 01633144[512] [qdm2 @ 00CB5670]decode(3336): 0169626C[556] -> 01633344[512] [qdm2 @ 00CB5670]decode(3336): 0169626C[556] -> 01633544[512] [qdm2 @ 00CB5670]decode(2780): 01696498[556] -> 01633744[512] Superblock follows Subpacket: type=2 size=553 start_offs=3 Subpacket: type=9 size=24 start_offs=4 Subpacket: type=23 size=110 start_offs=1e Subpacket: type=22 size=74 start_offs=8e Subpacket: type=21 size=125 start_offs=da Subpacket: type=20 size=126 start_offs=159 Subpacket: type=19 size=77 start_offs=1d9 Subpacket: type=0 size=0 start_offs=227 [qdm2 @ 00CB5670]decode(2780): 01696498[556] -> 01633944[512] [qdm2 @ 00CB5670]decode(2780): 01696498[556] -> 01633B44[512] [qdm2 @ 00CB5670]decode(2780): 01696498[556] -> 01633D44[512] [qdm2 @ 00CB5670]decode(2780): 01696498[556] -> 01633F44[512] [qdm2 @ 00CB5670]decode(2780): 01696498[556] -> 01634144[512] [qdm2 @ 00CB5670]decode(2780): 01696498[556] -> 01634344[512] [qdm2 @ 00CB5670]decode(2780): 01696498[556] -> 01634544[512] [qdm2 @ 00CB5670]decode(2780): 01696498[556] -> 01634744[512] [qdm2 @ 00CB5670]decode(2780): 01696498[556] -> 01634944[512] [qdm2 @ 00CB5670]decode(2780): 01696498[556] -> 01634B44[512] [qdm2 @ 00CB5670]decode(2780): 01696498[556] -> 01634D44[512] [qdm2 @ 00CB5670]decode(2780): 01696498[556] -> 01634F44[512] [qdm2 @ 00CB5670]decode(2780): 01696498[556] -> 01635144[512] [qdm2 @ 00CB5670]decode(2780): 01696498[556] -> 01635344[512] [qdm2 @ 00CB5670]decode(2780): 01696498[556] -> 01635544[512] [qdm2 @ 00CB5670]decode(2224): 016966C4[556] -> 01635744[512] Superblock follows Subpacket: type=2 size=553 start_offs=3 Subpacket: type=9 size=28 start_offs=4 Subpacket: type=23 size=5 start_offs=22 Subpacket: type=22 size=55 start_offs=29 Subpacket: type=21 size=100 start_offs=62 Subpacket: type=20 size=151 start_offs=c8 Subpacket: type=19 size=197 start_offs=161 Subpacket: type=0 size=0 start_offs=227 [qdm2 @ 00CB5670]decode(2224): 016966C4[556] -> 01635944[512] [qdm2 @ 00CB5670]decode(2224): 016966C4[556] -> 01635B44[512] [qdm2 @ 00CB5670]decode(2224): 016966C4[556] -> 01635D44[512] [qdm2 @ 00CB5670]decode(2224): 016966C4[556] -> 01635F44[512] [qdm2 @ 00CB5670]decode(2224): 016966C4[556] -> 01636144[512] [qdm2 @ 00CB5670]decode(2224): 016966C4[556] -> 01636344[512] [qdm2 @ 00CB5670]decode(2224): 016966C4[556] -> 01636544[512] [qdm2 @ 00CB5670]decode(2224): 016966C4[556] -> 01636744[512] [qdm2 @ 00CB5670]decode(2224): 016966C4[556] -> 01636944[512] [qdm2 @ 00CB5670]decode(2224): 016966C4[556] -> 01636B44[512] [qdm2 @ 00CB5670]decode(2224): 016966C4[556] -> 01636D44[512] [qdm2 @ 00CB5670]decode(2224): 016966C4[556] -> 01636F44[512] [qdm2 @ 00CB5670]decode(2224): 016966C4[556] -> 01637144[512] [qdm2 @ 00CB5670]decode(2224): 016966C4[556] -> 01637344[512] [qdm2 @ 00CB5670]decode(2224): 016966C4[556] -> 01637544[512] [qdm2 @ 00CB5670]decode(1668): 016968F0[556] -> 01637744[512] Superblock follows Subpacket: type=2 size=553 start_offs=3 Subpacket: type=9 size=32 start_offs=4 Subpacket: type=23 size=28 start_offs=26 Subpacket: type=22 size=52 start_offs=44 Subpacket: type=21 size=50 start_offs=7a Subpacket: type=20 size=76 start_offs=ae Subpacket: type=19 size=253 start_offs=fc Subpacket: type=0 size=0 start_offs=1fa .... -- Sergey

2 1

OGG THEORA/VORBIS TO FLV AUDIO/VIDEO SYNCHONIZATION ISSUES
by jmcveigh＠kidsco.ca 08 Jun '07

08 Jun '07

Hello; I produce many stop-motion animations starring toy Lego characters. Videos can be viewed at http://www.brickfilms.com/ . I must regularily convert from OGG THEORA/OGG VORBIS to FLV to place the files on a new website. I can successfully convert the file, but there are audio/video synchronization issues. The audio is lagging a few seconds behind. I would truly appreciate your assistance. Thank you for your time. Here is some more information about my setup: ffmpeg -i input.flv -ar 44100 output.flv FFmpeg version SVN-r8852, Copyright (c) 2000-2007 Fabrice Bellard, et al. configuration: --enable-libmp3lame --enable-libogg --enable-libtheora --enable-libvorbis libavutil version: 49.4.0 libavcodec version: 51.40.4 libavformat version: 51.12.1 built on Apr 27 2007 15:06:54, gcc: 4.1.1 20061011 (Red Hat 4.1.1-30) Running Fedora Core 6 If more details are required, please let me know.

2 1

Geerating YUV files from an input file
by jayashree.sripada＠wipro.com 03 Jun '07

03 Jun '07

Hi, I am trying to see what is the exact requirement to genrate a YUV file as oput using the ffmpeg.exe file.I give my command as ffmpeg -i test.mpg frame1.yuv. When I try to view this particular frame1.yuv file, using a YUV viewer I am not able to see the right output. The ouput is distorted. I have tried generating a YUV file from the same test.mpg input using the tutorial by Martin BOhme and I am able to view theYUV420 file in the YUV viewer. Can anybody please let me know what is wrong in the above command I have given, to generate a YUV file using ffmpeg.exe. Thanks in advance! Jayshree The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com

2 1

problem when compile ffmpeg in redhat linux
by weiyuhu2000＠hotmail.com 03 Jun '07

03 Jun '07

First,I compile lame,xvid,x264,faac,faad and so on Then the problem came when I compiled ffmpeg with:./configure --prefix=/data/usr --enable-gpl --enable-shared --enable-libmp3lame --enable-liba52 --enable-liba52bin --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libogg --enable-libvorbis --enable-x264 --enable-xvid --enable-amr-nb --enable-amr-wb --enable-pp --enable-pthreads --disable-ffserver --disable-ffplay faad test failed! I Wonder why?Should I do next? Any help is appreciated! thanks yours tiger _________________________________________________________________ ??????????????? MSN Hotmail? http://www.hotmail.com

2 1

VBR and CBR
by scamhaji＠mobibase.com 20 May '07

20 May '07

Hi, I'm trying to generate 2 kinds of 3gp files using mpeg4 codec for video and amr narrow band for audio : - one using VBR (for video) - and another one using CBR (also for video) Whatever the bit rates I use I can't obtain the desired result. Here are my command lines : First I'd like to obtain a variable bit rate between 84kbps and 144kbps: ffmpeg -i "sourcefile.mpeg" -y -ab 12.2k -ar 8000 -acodec amr_nb -ac 1 -vcodec mpeg4 -r 15 -b 104k -minrate 84k -maxrate 144k -bufsize 4096 -s qcif -pass 1 -passlogfile "passlog" "destfile.3gp" (I achieve the same command with -pass 2 for the second pass) -> The result I have is a variable bit rate between 60 and 160 kbps (average at 100kbps) For the constant bitrate at 40 kbps: ffmpeg -i "sourcefile.mpeg" -y -ab 12.2k -ar 8000 -acodec amr_nb -ac 1 -vcodec mpeg4 -r 15 -b 40k -minrate 40k -maxrate 40k -bufsize 4096 -s qcif -pass 1 -passlogfile "passlog" "destfile.3gp" (and the same with -pass 2) -> The result I have here is a bit rate varying between 20 and 63 kbps (average at 35kbps). Am I missing something ? By the way, what tool do you use to measure the bitrate ? I personnaly use openRTSP. Thanks St?phane

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high quality MPEG4 encoding with Xvid codec in ffmpeg
by pehache.7＠gmail.com 17 May '07

17 May '07

Hello, The ffmpeg FAQ suggests the following parameters for a high quality MPEG4 encoding: -mbd rd -flags +4mv+trell+aic -cmp 2 -subcmp 2 -g 300 -pass 1/2 indeed, this significantly enhances the resuting video, especially at low bitrate. Well, at least if "-vcodec mpeg4" is specified. When "-vcodec xvid" is specified instead, no noticeable enhancement is visible with these parameters. In fact "-vcodec xvid" or "-vcodec mpeg4" give similar results with the default parameters (xvid seems slightly better), but "-vcodec mpeg4" takes the edge with these parameters. Is it normal ? Xvid has the reputation of being an excellent MPEG4 encoder... Is there a better way to parameterize it in ffmpeg ? Similar question: while "-flags +ilme+ildct" used in conjonction with "-vcodec mpeg4" dramatically improves the quality of interlaced videos, the same flags with "-vcodec xvid" doesn't seem to have any effect. Any reason for that ? Thanks, -- pehache enlever NOSPAM. etc... pour r?pondre / remove NOSPAM... to reply http://pehache.free.fr/public.html

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Error when encoding to audio from avs script
by dickson＠paramagnus.com 17 May '07

17 May '07

FFMPEG seems to crash when encoding to mp3 from an avs script. I've tried 3 different builds (rev 8564, 8435, 8310 ) from the month of March 2007 and they all exhibit the same problem. I've tried different bitrates/samplerates etc., different audio/video source loaded in the avs script but ffmpeg still crashes. I don't recall this problem from previous ffmpeg builds. Any ideas? Sample Command: ffmpeg -i test.avs test.mp3 I also have another problem when converting (no avs scripts) certain audio files to mp3. I sometimes get a "lame: output buffer too small" error. Any idea on how to fix that? Thanks!

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Decoding H.264 video streams
by paulsen.stefan＠googlemail.com 16 May '07

16 May '07

Hi, this is my first post on this list. I'm trying to decode a H.264 decoded video using avcodec_decode_video(). I'm able decode all frames by opening a file on the harddisk with av_open_input_file(), fill the AVCodecContext object using avcodec_open() and afterwards passing the packets I get from av_read_frame() to avcodec_decode_video(). But what if only a pointer to the data is available? How should I fill the AVCodecContext object and is it sufficient to sequently pass data pieces of the video to avcodec_decode_video() until it's able to decode a whole frame? I tried the following example from apiexample.c: void video_decode_example(const char *outfilename, const char *filename) { AVCodec *codec; AVCodecContext *c= NULL; int frame, size, got_picture, len; FILE *f; AVFrame *picture; uint8_t inbuf[INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE], *inbuf_ptr; char buf[1024]; /* set end of buffer to 0 (this ensures that no overreading happens for damaged mpeg streams) */ memset(inbuf + INBUF_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE); printf("Video decoding\n"); /* find the video decoder */ codec = avcodec_find_decoder(CODEC_ID_H264); if (!codec) { fprintf(stderr, "codec not found\n"); exit(1); } c= avcodec_alloc_context(); picture= avcodec_alloc_frame(); if(codec->capabilities&CODEC_CAP_TRUNCATED) c->flags|= CODEC_FLAG_TRUNCATED; /* we dont send complete frames */ /* for some codecs, such as msmpeg4 and mpeg4, width and height MUST be initialized there because these info are not available in the bitstream */ c->width = 720; c->height = 576; /* open it */ if (avcodec_open(c, codec) < 0) { fprintf(stderr, "could not open codec\n"); exit(1); } /* the codec gives us the frame size, in samples */ f = fopen(filename, "rb"); if (!f) { fprintf(stderr, "could not open %s\n", filename); exit(1); } frame = 0; for(;;) { size = fread(inbuf, 1, INBUF_SIZE, f); if (size == 0) break; /* NOTE1: some codecs are stream based (mpegvideo, mpegaudio) and this is the only method to use them because you cannot know the compressed data size before analysing it. BUT some other codecs (msmpeg4, mpeg4) are inherently frame based, so you must call them with all the data for one frame exactly. You must also initialize 'width' and 'height' before initializing them. */ /* NOTE2: some codecs allow the raw parameters (frame size, sample rate) to be changed at any frame. We handle this, so you should also take care of it */ /* here, we use a stream based decoder (mpeg1video), so we feed decoder and see if it could decode a frame */ inbuf_ptr = inbuf; while (size > 0) { len = avcodec_decode_video(c, picture, &got_picture, inbuf_ptr, size); if (len < 0) { fprintf(stderr, "Error while decoding frame %d\n", frame); exit(1); } if (got_picture) { printf("saving frame %3d\n", frame); fflush(stdout); /* the picture is allocated by the decoder. no need to free it */ snprintf(buf, sizeof(buf), outfilename, frame); pgm_save(picture->data[0], picture->linesize[0], c->width, c->height, buf); frame++; } size -= len; inbuf_ptr += len; } } /* some codecs, such as MPEG, transmit the I and P frame with a latency of one frame. You must do the following to have a chance to get the last frame of the video */ len = avcodec_decode_video(c, picture, &got_picture, NULL, 0); if (got_picture) { printf("saving last frame %3d\n", frame); fflush(stdout); /* the picture is allocated by the decoder. no need to free it */ snprintf(buf, sizeof(buf), outfilename, frame); pgm_save(picture->data[0], picture->linesize[0], c->width, c->height, buf); frame++; } fclose(f); avcodec_close(c); free(c); free(picture); printf("\n"); } I'm getting all frames in the correct order. But they are all corrupted. The first lines of each frame seem to be decoded correctly, but the rest of the picture is faulty. Even if I'm filling the AVCodecContext object automatically using avcodec_open() the frames are not correct. Is there anything I'm not considering? Regards Stefan

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