September 2008 - ffmpeg-user - lists.ffmpeg.org

axis mpeg4 stream w/ aac audio
by danielp＠choma.hu 30 May '14

30 May '14

Hello, i've an Axis 247s video server which provides mpeg4 stream w/ aac audio, and i would like to get an flv stream from this. i've compiled ffmpeg/ffserver with --enable-libmp3lame --enable- shared --enable-libamr-nb --enable-nonfree --enable-gpl --enable- libfaad --enable-libfaac i can get the stream work with ffserver without audio, but not with audio. my ffserver.conf: Port 8090 BindAddress 0.0.0.0 MaxClients 1000 MaxBandwidth 1000 CustomLog - NoDaemon <Feed feed1.ffm> File /tmp/feed1.ffm FileMaxSize 1G ACL allow 127.0.0.1 </Feed> <Stream test.flv> # the source feed Feed feed1.ffm # the output stream format - FLV = FLash Video Format flv VideoCodec flv # this must match the ffmpeg -r argument VideoFrameRate 25 # generally leave this is a large number VideoBufferSize 80000 # another quality tweak VideoBitRate 500 # quality ranges - 1-31 (1 = best, 31 = worst) VideoQMin 1 VideoQMax 5 VideoSize 640x480 # this sets how many seconds in past to start PreRoll 0 AudioBitRate 64 AudioChannels 1 AudioSampleRate 44100 AudioCodec mp3 </Stream> i've tried several things like: openRTSP -b 80000 -y -c -4 -f 25 -w 640 -h 480 -t rtsp://xxx.hu:554/mpeg4/1/media.amp | \ ffmpeg -v 9 -vcodec mpeg4 -acodec mpeg4aac -ab 32k -i - -acodec libmp3lame -ar 44100 -ab 64k -ac 1 -vcodec mpeg4 http://localhost:8090/ or: mencoder \ -rtsp-stream-over-tcp rtsp://xxx.hu:554/mpeg4/1/media.amp \ -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=500:mbd=2:mv0:trell:v4mv:cbp:last_pred=3 \ -oac mp3lame -lameopts abr:br=64:q=1:mode=3 \ -o - | \ ffmpeg \ -ab 32 -acodec mp3 -ar 44100 -ac 1 -f mpeg -r 25 -i - \ -r 25 -ab 32 -acodec mp3 -ar 44100 -ac 1 http://localhost:8090/ and tons of switches, but nothing worked. can you please help me somehow? thx, -- dp

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convert a sequence of images to a video file
by joshjdevl＠gmail.com 04 Oct '12

04 Oct '12

Hi, I would like to convert a series of images (png files) to a video. Would something like this work? ffmpeg -r 29.97 -i /images/picture%.png out.avi When I try the above, I get picture%d.jpg: I/O error occurred Usually that means that input file is truncated and/or corrupted. Thanks, Josh

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named pipes - > x264
by joshjdevl＠gmail.com 29 May '12

29 May '12

Hi, I was following these instructions to do a named pipe to x264 http://ffmpeg.x264.googlepages.com/piping mkfifo fifo.y4m ffmpeg -i test.mp4 -an -f yuv4mpegpipe - > fifo.y4m & x264 --quiet --crf 18 -o video.264 fifo.y4m For some reason, ffmpeg just sits here Stream mapping: Stream #0.1 -> #0.0 Press [q] to stop encoding It doesn't do any processing of test.mp4 and basically sits as a blank console. If I do something like ffmpeg -i test.mp4 -an -f yuv4mpegpipe - > test.y4m & Where test.y4m is not a named pipe, then test.y4m will end up being the yuv4 data... So I guess my question is, is there some extra option I need to compile ffmpeg or x264 with? Or is there another option I need to pass in? I tested this on Ubuntu 8.04 and centos 5.2 Thanks, Josh

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.m4a to .flv - image/video fails
by nreddig＠ptd.net 31 Mar '12

31 Mar '12

Hi all, I have greatly appreciated the information I have already gleaned from reading this forum. However I still can not solve my current problem. I am trying to convert from .m4a to .flv. These are podcast files (.m4a) built in garage band. Pictures were added as well and we would like to use this format to create weekly announcements because Garage Band is so easy for our non-technically oriented staff. Using ffmpeg the audio converts just fine but the "video" is not right. I guess it's because these files include chapter data not actual video. However when I convert it to any format the images fly through at different rates, then it seems to get stuck on a picture in the middle. The format I would like to convert to is flash so that I can easy display multiple announcement files using a flash player. I can convert .mov to .flv no problem. Converting .m4a to .mov and then .flv doesn't produce any better results. Here are the before and after files: http://www.warwicksd.org/warwick.m4a http://www.warwicksd.org/output.flv I used the following to get my conversion: ffmpeg -i warwick.m4a -b 300k -r 12 -s 300x300 -ar 22050 -y -ab 96k output.flv FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2007 Fabrice Bellard, et al. configuration: --enable-gpl --enable-libfaac --enable-libfaad --enable- libmp3lame --disable-vhook --enable-shared libavutil version: 49.5.0 libavcodec version: 51.44.0 libavformat version: 51.14.0 built on Oct 22 2007 15:31:25, gcc: 3.3 20030304 (Apple Computer, Inc. build 1640) Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'warwick.m4a': Duration: 00:00:55.9, start: 0.000000, bitrate: 100 kb/s Stream #0.0(eng): Audio: mpeg4aac, 44100 Hz, stereo Stream #0.1(eng): Video: mjpeg, yuvj420p, 300x300, 44100.00 fps(r) Stream #0.2(eng): Data: tx3g / 0x67337874 Stream #0.3(eng): Data: text / 0x74786574 Output #0, flv, to 'output.flv': Stream #0.0(eng): Video: flv, yuv420p, 300x300, q=2-31, 300 kb/s, 12.00 fps (c) Stream #0.1(eng): Audio: libmp3lame, 22050 Hz, stereo, 96 kb/s Stream mapping: Stream #0.1 -> #0.0 Stream #0.0 -> #0.1 Press [q] to stop encoding frame= 83 fps= 21 q=2.0 Lsize= 1099kB time=6.9 bitrate=1301.6kbits/s video:70kB audio:657kB global headers:0kB muxing overhead 51.296550% .mov files convert nicely to .flv but these .m4as are just not working. Our current staff is very eager to use these Garage Band files to communicate announcements. I have been so desperate to get this particular file type to convert that I have been experimenting with grabbing the frames every 5 secs. and then rebuilding the images into video. This produces strange results and seems to be more programming then should be necessary. Thanks in advanced for any solutions you can provide. Nancy Reddig Web Programmer Warwick SD

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video4linux2 - NTSC webcam
by knox1808＠yahoo.com 29 Jan '10

29 Jan '10

I'm hoping someone can lead me in the right direction.? I've upgraded my OLD debian to ubuntu and noticed my old-fashioned way of capturing video from my webcam doesn't work anymore.? I used to be able to call ffmpeg with: ffmpeg -vd /dev/video0 -s 320x240 test.flv I noticed that ffmpeg now requires: ffmpeg -f video4linux2 -i /dev/video0 However, I am getting errors about incorrect parameters with the following: ffmpeg -f video4linux2 -i /dev/video0 -s 320x240 -an test.flv FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2007 Fabrice Bellard, et al. ? configuration: --enable-gpl --enable-pp --enable-swscaler --enable-pthreads --enable-libvorbis --enable-libtheora --enable-libogg --enable-libgsm --enable-dc1394 --disable-debug --enable-shared --prefix=/usr ? libavutil version: 1d.49.3.0 ? libavcodec version: 1d.51.38.0 ? libavformat version: 1d.51.10.0 ? built on Mar 12 2008 14:31:53, gcc: 4.2.3 (Ubuntu 4.2.3-2ubuntu4) [video4linux2 @ 0xb7fc7110]Missing/Wrong parameters /dev/video0: Error while opening file I've changed permissions to /dev/video0 with chmod g+rw /dev/video0 since I had issues like that in the past. I must be missing some newly-required parameters?? In a more recent SVN (June 22nd), I got a similar error, but it had text more like "Incorrect width, height, or rate". Any help is appreciated.

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Compiling ffmpeg with extra libs without root access
by jakobdj＠gmail.com 15 Apr '09

15 Apr '09

Hi I am trying to compile ffmpeg but I don't have root privilige on the machine. I've compiled using --prefix when configuring - but the problem is that I need to use lameMp3 encoder and libamr-wb and libamr- nb. These I have installed and placed in my home dir - but how do I make sure that ffmpeg looks there when compiling. This is my problem - how do I tell ffmpeg explicitly where to look for extra libs? Kind regards, Jakob Dam Jensen

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streaming ip camera
by rentafranz＠googlemail.com 12 Nov '08

12 Nov '08

hi there, i've got an ip camera on my local net and want to build a live stream of its pictures. the camera provides the current picture under http://<ip>/jpg/image.jpg i wrote a bash skript that sends the camera pictures to ffserver: while true; do ffmpeg -an -i http://192.168.0.201/jpg/image.jpg http://localhost:8090/feed1.ffm; done; when i access http://localhost:8090/test1.mpg with ffplay i see a freeze image, but only if i'm lucky... most times nothing happens... why doesn't ffserver buffer the cam pics? i would be happy if someone helps me. franz

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Please help. I'm lost. I'm trying to make a windows vista computer we have here in the office into a streaming server
by bama.j.777＠gmail.com 29 Oct '08

29 Oct '08

I'm making a windows vista computer we have here in the office into a streaming server. I configured IIS but it's stil not complete and then I installed ffmpeg.exe in windows and it works wherein it converts from a media movie to a .flv Now I need to stream live video using ffmpeg and what I know is I will need ffserver. Is there an ffserver.exe i may download for free somewhere? Or can ffmpeg.exe do the streaming? There are tutorials on how to install and build ffmpeg via the cmd terminal but whatever they taught were futile so I wasn't able to buiold ffmpeg from scratch and I believe I need ffserver to be compiled too. I was able to find the ffmpeg.exe download instead. How do I configure all this? How do I set up this computer int the office into a media streaming server? I'm stuck. Please help. I can't afford flash media server. Please help. I'm lost.

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FFmpeg installlation error
by sr_novell＠yahoo.com 07 Oct '08

07 Oct '08

Hi All, I am getting the following error while installing 'make' ffmpeg. Please advice.. Is it a Bug? ------------------------------ Wwrite-strings -O3 -fno-math-errno -c -o libavdevice/v4l2.o libavdevice/v4l2.c In file included from libavdevice/v4l2.c:38: /usr/include/linux/videodev2.h:461: error: expected ?=?, ?,?, ?;?, ?asm? or ?__attribute__? before ?v4l2_std_id? /usr/include/linux/videodev2.h:544: error: expected specifier-qualifier-list before ?v4l2_std_id? /usr/include/linux/videodev2.h:561: error: expected specifier-qualifier-list before ?v4l2_std_id? /usr/include/linux/videodev2.h:599: error: expected specifier-qualifier-list before ?v4l2_std_id? /usr/include/linux/videodev2.h:622: error: expected specifier-qualifier-list before ?__s64? libavdevice/v4l2.c: In function ?first_field?: libavdevice/v4l2.c:191: error: ?v4l2_std_id? undeclared (first use in this function) libavdevice/v4l2.c:191: error: (Each undeclared identifier is reported only once libavdevice/v4l2.c:191: error: for each function it appears in.) libavdevice/v4l2.c:191: error: expected ?;? before ?std? libavdevice/v4l2.c:193: error: ?std? undeclared (first use in this function) libavdevice/v4l2.c:197: error: expected ?)? before numeric constant libavdevice/v4l2.c:197: error: expected ?)? before numeric constant libavdevice/v4l2.c:197: error: expected ?)? before numeric constant libavdevice/v4l2.c: In function ?v4l2_set_parameters?: libavdevice/v4l2.c:474: error: ?struct v4l2_standard? has no member named ?name? libavdevice/v4l2.c:480: error: ?struct v4l2_standard? has no member named ?id? libavdevice/v4l2.c:481: error: ?v4l2_std_id? undeclared (first use in this function) libavdevice/v4l2.c:481: error: ?struct v4l2_standard? has no member named ?id? make: *** [libavdevice/v4l2.o] Error 1 Regards, Alex

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v4l2 forcing reduced resolution
by randall＠tnr.cc 04 Oct '08

04 Oct '08

I'm encoding video from a Logitech Oribit AF that should support these resolutions under USB 1.1 for mjpeg: Listing available frame formats for device video0: Pixel format: MJPG (MJPEG; MIME type: image/jpeg) Frame size: 160x120 Frame rates: 30, 25, 20, 15, 10, 5 Frame size: 176x144 Frame rates: 30, 25, 20, 15, 10, 5 Frame size: 320x240 Frame rates: 30, 25, 20, 15, 10, 5 Frame size: 352x288 Frame rates: 30, 25, 20, 15, 10, 5 Frame size: 640x480 Frame rates: 30, 25, 20, 15, 10, 5 Frame size: 800x600 Frame rates: 15, 10, 5 When I try to record with ffmpeg at 320x240, it forces the resolution down to 176x144. This would be correct behavior for YUYV, but 320x240 MJPG should be no problem, even on USB 1.1. Here's the command and output: root at gumstix-custom-verdex:~$ ffmpeg -s 320x240 -r 5 -f video4linux2 -vcodec mjpeg -i /dev/video0 out.avi FFmpeg version SVN-r15392, Copyright (c) 2000-2008 Fabrice Bellard, et al. configuration: --enable-cross-compile --cc=/home/randall/gumstix/gumstix-oe/tmp/cross/bin/arm-angstrom-linux-gnueabi-gcc --arch=arm --enable-nonfree --disable-stripping --disable-armvfp --disable-armv6 libavutil 49.10. 0 / 49.10. 0 libavcodec 52. 0. 0 / 52. 0. 0 libavformat 52.22. 1 / 52.22. 1 libavdevice 52. 1. 0 / 52. 1. 0 built on Sep 23 2008 13:05:31, gcc: 4.1.2 [video4linux2 @ 0x7c3320][3]Capabilities: 4000001 [video4linux2 @ 0x7c3320]The V4L2 driver changed the video from 320x240 to 176x144 Input #0, video4linux2, from '/dev/video0': Duration: N/A, start: 1222143652.782699, bitrate: 2027 kb/s Stream #0.0: Video: mjpeg, yuyv422, 176x144, 2027 kb/s, 5.00 tb(r) File 'out.avi' already exists. Overwrite ? [y/N] y Output #0, avi, to 'out.avi': Stream #0.0: Video: mpeg4, yuv420p, 176x144, q=2-31, 200 kb/s, 5.00 tb(c) Stream mapping: Stream #0.0 -> #0.0 Press [q] to stop encoding frame= 0 fps= 0 q=0.0 size= 6kB time=10000000000.00 bitrate= 0.0kbits/s BTW, it also just seems to do nothing. It doesn't actually write any data. I'm able to achieve 800x600 with uvccapture. If I leave out "-vcodec mjpeg", it drops to the same resolution and does encode and write data, but it uses YUYV instead of MJPG input. Ideas? Randall

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