May 2011 - ffmpeg-user - lists.ffmpeg.org

Metadata muxer/demuxer documentation?
by Tristan Trutna 18 Jun '11

18 Jun '11

The metadata documentation for ffmetadata ( http://www.ffmpeg.org/ffmpeg.html#TOC130 ) clearly explains the fileformat, but I am unable to find documentation regarding input or output of these files. Specifically, I would like to create an ffmetadata file from an input mp3 file, edit that file, and then transcode the mp3 file into an AAC file using the edited ffmetadata file to provide metadata to the new AAC file rather than using the -map_meta_data argument. What is the argument I should be using to output or input ffmetadata files? Thank you, Tristan

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(no subject)
by Fico Mico 14 Jun '11

14 Jun '11

http://in-art-online.com/e-commerce/images/site.html

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Re: [FFmpeg-user] mkv to avi errors
by Andrey m0shbear Vul 14 Jun '11

14 Jun '11

-original message- Subject: Re: [FFmpeg-user] mkv to avi errors From: James Darnley <james.darnley(a)gmail.com> Date: 2011-05-26 09:30 On 26/05/2011, Rick C. <rickcorteza(a)gmail.com> wrote: > Stream #0.1(eng): Audio: libmp3lame, 48000 Hz, 5.1, s16, 192 kb/s MP3 does not support more than 2 channels _______________________________________________ Indeed. Might i suggest transcoding to dolby digital aka ac/3?

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Reading RTSP from Axis cameras via FFMPEG
by stas.oskin＠gmail.com 10 Jun '11

10 Jun '11

Hi. I'm trying to read video from Axis camera via ffmpeg and ffplay. The use link goes like this: rtsp://192.168.253.201:554/mpeg4/media.amp The video starts fine, but then immediately breaks to parts. ffmpeg/ffplay start to throw the following errors: [mpeg4 @ 0x1a350400]concealing 661 DC, 661 AC, 661 MV errors [mpeg4 @ 0x1a350400]slice end not reached but screenspace end (44419 left 6CC8BD, score= -262) [mpeg4 @ 0x1a350400]concealing 690 DC, 690 AC, 690 MV errors [mpeg4 @ 0x1a350400]slice end not reached but screenspace end (12453 left 7E1653, score= -263) [mpeg4 @ 0x1a350400]concealing 690 DC, 690 AC, 690 MV errors [mpeg4 @ 0x1a350400]1. marker bit missing in 3. esc [mpeg4 @ 0x1a350400]Error at MB: 206 [mpeg4 @ 0x1a350400]concealing 539 DC, 539 AC, 539 MV errors [mpeg4 @ 0x1a350400]slice end not reached but screenspace end (11108 left 7091E5, score= -268) [mpeg4 @ 0x1a350400]concealing 690 DC, 690 AC, 690 MV errors [mpeg4 @ 0x1a350400]I cbpy damaged at 18 9 [mpeg4 @ 0x1a350400]Error at MB: 297 [mpeg4 @ 0x1a350400]concealing 451 DC, 451 AC, 451 MV errors [mpeg4 @ 0x1a350400]slice end not reached but screenspace end (11107 left 6CF4B6, score= -275) [mpeg4 @ 0x1a350400]concealing 690 DC, 690 AC, 690 MV errors [mpeg4 @ 0x1a350400]slice end not reached but screenspace end (11110 left 7C5C0C, score= -279) [mpeg4 @ 0x1a350400]concealing 690 DC, 690 AC, 690 MV errors VLC, when connecting to same link, works just fine. Any idea what happens? Thanks!

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Streaming MP4
by JULIAN GARDNER 04 Jun '11

04 Jun '11

I was wondering if anybody has managed to get ffmpeg to stream out MP4 video/audio. I have a working system using mpeg-ts and h264/aac and i now need to dual send some channels in MP4 as well, but when i change the output format to mp4 i get "could not write header for output file #0" Anybody have any ideas to why this does not work or a way of getting it to work. joolz

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Encoding v210 fails when using PIX_FMT_YUV422P16LE even though PIX_FMT_YUV422P10LE is deprecated
by Thomas Worth 02 Jun '11

02 Jun '11

I am having trouble encoding v210 material even though I am using the correct encoding parameters: c->codec_type = AVMEDIA_TYPE_VIDEO; c->codec_id = CODEC_ID_V210; c->pix_fmt = PIX_FMT_YUV422P16LE; c->bits_per_raw_sample = 10; c->codec_tag = *((uint32_t*)"v210"); avcodec_find_encoder(c->codec_id) works, but avcodec_open() fails. If I change pix_fmt to PIX_FMT_YUV422P10LE, I don't get any errors but the packing appears to be wrong. My code is already set up to pack YUV422P16. Am I missing an additional encoding parameter? FYI, this all works fine with libav.

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Problem editing m4a files with ffmpeg
by richard 01 Jun '11

01 Jun '11

When I edit an m4a file using ffmpeg using command like this: ffmpeg -i filename.m4a -ss 00:02:34 -t 00:28:35 -acodec copy outputfile.m4a the edited file will play OK on software media players, but large m4a files won't play on my Marantz CD6003. The files timeout after 30 seconds. If I use mp4creator to optimize the edited m4a file using command like this: mp4creator -optimize filename.m4a the optimized file plays OK on the Marantz. I found out using AtomicParsley that editing an m4a file with ffmpeg moves the mdat atoms from the end of the file to near the front. This seems to be an issue for the Marantz. mp4creator moves the mdat atoms back to the end of the file again. Is this a bug in ffmpeg? You kindly fixed another issue with the Marantz here:- http://ffmpeg.org/pipermail/ffmpeg-user/2011-April/000374.html

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Building for ARM
by Wernam Wer 01 Jun '11

01 Jun '11

Hi all, I'm building ffmpeg for an ARM with Linux headers 2.6 to send video frames over RTP, ffmpeg only have to packet these frames and send it. I need to optimize the space so I use the minimal configuration. I have compile the revision 26400 with this configuration and works fine: ./configure --enable-cross-compile --cross-prefix=../../Cross/arm-softfloat-linux-gnu/bin/arm-softfloat-linux-gnu- --target-os=linux --cc=../../Cross/arm-softfloat-linux-gnu/bin/arm-softfloat-linux-gnu-gcc --host-cc=../../Cross/arm-softfloat-linux-gnu/bin/arm-softfloat-linux-gnu-gcc --cpu=armv5te --arch=arm --enable-static --disable-asm --enable-armv5te --disable-stripping --disable-debug --disable-encoders --disable-decoders --disable-parsers --disable-ffplay --disable-ffserver --disable-devices --disable-bsfs --disable-muxers --enable-parser=mpeg4video --enable-muxer=rtp --enable-parser=aac --disable-filters --disable-demuxers --enable-demuxer=m4v --extra-libs=-static --extra-cflags=--static --disable-ffprobe I use with this command (with this output): # ffmpeg -vcodec copy -i pipe -an -f rtp rtp://224.52.52.22:7004 -sameq -v 0 < /dev/null & [3] 178 # FFmpeg version SVN-r26400, Copyright (c) 2000-2011 the FFmpeg developers built on Jan 18 2011 09:48:17 with gcc 4.1.2 configuration: --enable-cross-compile --cross-prefix=../../Cross/arm-softfloat-linux-gnu/bin/arm-softfloat-linux-gnu- --target-os=linux --cc=../../Cross/arm-softfloat-linux-gnu/bin/arm-softfloat-linux-gnu-gcc --host-cc=../../Cross/arm-softfloat-linux-gnu/bin/arm-softfloat-linux-gnu-gcc --cpu=armv5te --arch=arm --enable-static --disable-asm --enable-armv5te --disable-stripping --disable-debug --disable-encoders --disable-decoders --disable-parsers --disable-ffplay --disable-ffserver --disable-devices --disable-bsfs --disable-muxers --enable-parser=mpeg4video --enable-muxer=rtp --enable-parser=aac --disable-filters --disable-demuxers --enable-demuxer=m4v --extra-libs=-static --extra-cflags=--static libavutil 50.36. 0 / 50.36. 0 libavcore 0.16. 1 / 0.16. 1 libavcodec 52.108. 0 / 52.108. 0 libavformat 52.93. 0 / 52.93. 0 libavdevice 52. 2. 3 / 52. 2. 3 libavfilter 1.74. 0 / 1.74. 0 libswscale 0.12. 0 / 0.12. 0 puntero a frame (fis): 0xc2780004 [m4v @ 0x3538a0] max_analyze_duration reached [m4v @ 0x3538a0] Estimating duration from bitrate, this may be inaccurate Input #0, m4v, from 'pipe': Duration: N/A, bitrate: N/A Stream #0.0: Video: [0][0][0][0] / 0x0000, 352x288 [PAR 1:1 DAR 11:9], 25 fps, 25 tbr, 1200k tbn, 25 tbc Output #0, rtp, to 'rtp://224.52.52.22:7004': Metadata: encoder : Lavf52.93.0 Stream #0.0: Video: [0][0][0][0] / 0x0000, 352x288 [PAR 1:1 DAR 11:9], q=2-31, 90k tbn, 25 tbc Stream mapping: Stream #0.0 -> #0.0 SDP: v=0 o=- 0 0 IN IP4 127.0.0.1 s=No Name c=IN IP4 224.52.52.22 t=0 0 a=tool:libavformat 52.93.0 m=video 7004 RTP/AVP 96 a=rtpmap:96 MP4V-ES/90000 a=fmtp:96 profile-level-id=1; config=000001B003000001B50900000100000001200086C400668582120A31 Press [q] to stop encoding If I try to use the version 0.6.3, I can compile it fine, but it doesn't work, i get this output: # ./ffmpeg.last -vcodec copy -i pipe -an -f rtp rtp://224.52.52.22:7004 -sameq -re FFmpeg version 0.6.3, Copyright (c) 2000-2010 the FFmpeg developers built on May 12 2011 13:00:49 with gcc 4.1.2 configuration: --enable-cross-compile --cross-prefix=../../Cross/arm-softfloat-linux-gnu/bin/arm-softfloat-linux-gnu- --target-os=linux --cc=../../Cross/arm-softfloat-linux-gnu/bin/arm-softfloat-linux-gnu-gcc --host-cc=../../Cross/arm-softfloat-linux-gnu/bin/arm-softfloat-linux-gnu-gcc --cpu=armv5te --arch=arm --enable-static --disable-asm --enable-armv5te --disable-stripping --disable-debug --disable-encoders --disable-decoders --disable-parsers --disable-ffplay --disable-ffserver --disable-devices --disable-bsfs --disable-muxers --enable-parser=mpeg4video --enable-muxer=rtp --enable-parser=aac --disable-filters --disable-demuxers --enable-demuxer=m4v --extra-libs=-static --extra-cflags=--static --disable-ffprobe libavutil 50.15. 1 / 50.15. 1 libavcodec 52.72. 2 / 52.72. 2 libavformat 52.64. 2 / 52.64. 2 libavdevice 52. 2. 0 / 52. 2. 0 libswscale 0.11. 0 / 0.11. 0 [m4v @ 0x30e360]max_analyze_duration reached [m4v @ 0x30e360]Estimating duration from bitrate, this may be inaccurate Input #0, m4v, from 'pipe': Duration: N/A, bitrate: N/A Stream #0.0: Video: 0x0000, 352x288 [PAR 1:1 DAR 11:9], 25 fps, 25 tbr, 1200k tbn, 25 tbc And doesn't sent anything. My question is I how can I debug it or if I'm doing anything wrong. I also try to use the last version or the 0.7.rc1 but both doesn't compile, I get this error: /home/john/ffmpeg/ffmpeg-0.7-rc1/libavformat/libavformat.a(utils.o): In function `.L2670': utils.c:(.text+0x928c): undefined reference to `ff_find_pix_fmt' collect2: ld returned 1 exit status make: *** [ffmpeg_g] Error 1 Thanks for the answers. Wernam

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Complete beginner - no sound with screencasting using x11grab?
by lugoteehalt 01 Jun '11

01 Jun '11

Trying to use ffmpeg to record the screen. The following command does not work, but remove '-i pulse' and it works perfectly, but without sound. ffmpeg -f x11grab -i pulse -s `xdpyinfo | grep 'dimensions:'| awk '{print $2}'` -r 25 -i :0.0 -sameq out.mpg ffmpeg version git-N-30155-g01a73d6, Copyright (c) 2000-2011 the FFmpeg developers built on May 23 2011 22:32:40 with gcc 4.4.5 configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-x11grab libavutil 51. 2. 1 / 51. 2. 1 libavcodec 53. 6. 0 / 53. 6. 0 libavformat 53. 2. 0 / 53. 2. 0 libavdevice 53. 0. 0 / 53. 0. 0 libavfilter 2. 10. 0 / 2. 10. 0 libswscale 0. 14. 0 / 0. 14. 0 libpostproc 51. 2. 0 / 51. 2. 0 [x11grab @ 0x9456b40] device: pulse -> display: pulse x: 0 y: 0 width: 0 height: 0 [x11grab @ 0x9456b40] Could not open X display. pulse: Input/output error Current stable version of Debian. Have installed the package 'pulseaudio'. Put in this in /etc/asound.conf: pcm.pulse { type pulse } ctl.pulse { type pulse } pcm.!default { type pulse } ctl.!default { type pulse } As suggested in this forum. Any help appreciated. -- View this message in context: http://ffmpeg-users.933282.n4.nabble.com/Complete-beginner-no-sound-with-sc… Sent from the FFmpeg-users mailing list archive at Nabble.com.

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Convert a file being downloaded
by LongkerDandy 31 May '11

31 May '11

Hi I'm tring to convert a file using command like: ffmpeg -i input.mp4 -vcodec copy -acodec libfaac -ac 2 output.mp4 The problem is the file is being donwloaded and its size is keep increasing. The ffmpeg conversion stopped long before the download finished. So I only got part of the file. Is there a good way to get around it? In fact, I'm trying to convert some online videos. I know ffmpeg can handle http and other protocols. But I have to download it first because some website require special user agent (or other http header). So ffmpeg can't read them directly (at least I don't know how to change the ffmpeg's http header). Any hint? Regards LongkerDandy

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