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

inserting images in video stream.
by Richard.Pickett＠CSRTechnologies.com 08 Sep '08

08 Sep '08

We are creating some videos for the web (flv). We have one solid video compiled as a .ogg (screen recording) and an accompanying .wav (voice recording). We would love to use -f x11grab but it complains it doesn't know that format (grrrr), even though it's in the man page... (sigh) That's for another post (coming in just a few minutes). Anyway, the task we have at hand is this screen capture transitions back and forth between two screens. The transition is smooth but we would like the viewer to see an information screen that says "switching to...." so not only do they hear the naration say we are switching to the other screen but they also have the displayed images telling them the same. We have an image int insert at exactly those points in the video but can't quite figure out the best way to do it and we hope someone here can point us at which solution is the easiest and simplest. Method 1: overlap the 1.5 second transtion in the original movie with the 1.5 second "switching to" movie. We would think this would look something like this: ffmpeg -f ogg -i screen_capture.ogg \ -i sound_capture.wav \ -r 15 -s 1024x768 \ -ab 128k -ar 44100 -ac 2 \ -itsoffset 4.5 -i switching_to.avi \ -y -t $time ${final}_full.flv the -itsoffset 4.5 -i switching_to.avi is the line where we insert the switching avi at 4.5 seconds into the video - except it does absolutely nothing. Method 2: extract the entire ogg in separate image files (one per frame), replace the 23 frames at the transition with the "switching to" image, rebuild the movie from all the image frames. Method 3: extract the ogg int separate movies and "chop" out the transition frames, then recompile the entire movie by -i inserting each ogg with a "switching to" movie in between each ogg move fragment Or is there an easier way? Thanks so much for you help.

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FFMPEG imlib2 watermarking problem
by anamalikhan＠yahoo.com 08 Sep '08

08 Sep '08

Hi to All, I am using FFMPEG watermark.so to do watermarked videos but now i am going to use imlib2.so because it provides better support for text and graphics than watermark.so. I have installed imlib2-* rpms.? when i? enter this below command ffmpeg-15219 -i test.mp4 -ar 22050 -vhook '/usr/lib/libImlib2.so.1.4.0 -i image.png' -y test.flv It gives me following error Failed to find Process entrypoint in /usr/lib/libImlib2.so.1.4.0 Failed to add video hook function: /usr/lib/libImlib2.so.1.4.0 -i image.png Help if you know how to resolve this imlib2 issue. Thanks FFMPEG USER

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svn: Can't copy ... Success
by chaz＠chaz6.com 07 Sep '08

07 Sep '08

Hi Sometimes when I haven't updated for a few days, I get the following error:- svn: Can't copy '.svn/text-base/Doxyfile.svn-base' to '.svn/tmp/Doxyfile.tmp.tmp': Success The only way I have found to fix it is to scrub the entire source folder and download a whole new copy, which is a pain because of a few local patches I have to reapply. Is there a better way around it? Regards, Chris Hills

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gmake install not installing
by alanpae＠ilkda.com 07 Sep '08

07 Sep '08

Hi there, I have a rather weird issue. I have compiled up the latest version of ffmpeg and from what I can tell the compilation was successful. That is, there were no significant errors and the compilation seems to have concluded. The last few lines are: rm -f libavutil/libavutil.a ar rc libavutil/libavutil.a libavutil/adler32.o libavutil/aes.o libavutil/base64.o libavutil/crc.o libavutil/des.o libavutil/fifo.o libavutil/intfloat_readwrite.o libavutil/lfg.o libavutil/lls.o libavutil/log.o libavutil/lzo.o libavutil/mathematics.o libavutil/md5.o libavutil/mem.o libavutil/random.o libavutil/rational.o libavutil/rc4.o libavutil/sha1.o libavutil/string.o libavutil/tree.o libavutil/utils.o ranlib libavutil/libavutil.a rm vhook/drawtext.o vhook/null.o vhook/watermark.o vhook/ppm.o vhook/fish.o So I su - to root to gmake install and ran into the following: # gmake install install -d "/usr/local/lib" install -m 644 libswscale/libswscale.a "/usr/local/lib" find: cannot follow symbolic link /bin/bil2xd: No such file or directory find: cannot follow symbolic link /bin/checkjava: No such file or directory find: cannot follow symbolic link /bin/gil2xd: No such file or directory find: cannot follow symbolic link /bin/smallxd: No such file or directory find: cannot follow symbolic link /bin/smctl: No such file or directory find: cannot follow symbolic link /bin/sunstudio: No such file or directory find: cannot follow symbolic link /bin/uil2xd: No such file or directory find: cannot follow symbolic link /bin/visu: No such file or directory find: cannot follow symbolic link /bin/visuroot: No such file or directory find: cannot follow symbolic link /bin/xdcapture: No such file or directory find: cannot follow symbolic link /bin/xdconfig: No such file or directory find: cannot follow symbolic link /bin/xdesigner: No such file or directory find: cannot follow symbolic link /bin/xdhelp: No such file or directory find: cannot follow symbolic link /bin/xdrecord: No such file or directory find: cannot follow symbolic link /bin/xdreplay: No such file or directory find: cannot follow symbolic link /bin/xdroot: No such file or directory find: cannot follow symbolic link /bin/xdtosj: No such file or directory find: cannot follow symbolic link /usr/bin/bil2xd: No such file or directory find: cannot follow symbolic link /usr/bin/checkjava: No such file or directory find: cannot follow symbolic link /usr/bin/gil2xd: No such file or directory find: cannot follow symbolic link /usr/bin/smallxd: No such file or directory find: cannot follow symbolic link /usr/bin/smctl: No such file or directory find: cannot follow symbolic link /usr/bin/sunstudio: No such file or directory find: cannot follow symbolic link /usr/bin/uil2xd: No such file or directory find: cannot follow symbolic link /usr/bin/visu: No such file or directory find: cannot follow symbolic link /usr/bin/visuroot: No such file or directory find: cannot follow symbolic link /usr/bin/xdcapture: No such file or directory find: cannot follow symbolic link /usr/bin/xdconfig: No such file or directory find: cannot follow symbolic link /usr/bin/xdesigner: No such file or directory find: cannot follow symbolic link /usr/bin/xdhelp: No such file or directory find: cannot follow symbolic link /usr/bin/xdrecord: No such file or directory find: cannot follow symbolic link /usr/bin/xdreplay: No such file or directory find: cannot follow symbolic link /usr/bin/xdroot: No such file or directory find: cannot follow symbolic link /usr/bin/xdtosj: No such file or directory find: cycle detected for /lib/32/ find: cycle detected for /lib/secure/32/ find: cycle detected for /usr/lib/locale/en_US.UTF-8/32/ find: cycle detected for /usr/lib/locale/en_US.UTF-8/LC_CTYPE/32/ find: cycle detected for /usr/lib/locale/en_US.UTF-8/LO_LTYPE/32/ find: cycle detected for /usr/lib/secure/32/ find: cycle detected for /usr/lib/32/ find: cycle detected for /usr/lib/lwp/32/ find: cycle detected for /usr/lib/elfedit/32/ find: cycle detected for /usr/lib/link_audit/32/ find: cycle detected for /usr/lib/libp/32/ install: libswscale.a was not found anywhere! gmake: *** [install-libswscale-static] Error 2 # find . -name libswscale.a ./libswscale/libswscale.a What should I do or is there a way that I can just copy the files to where they belong? Thanks in advance, alan

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ac3 crash
by eliared＠yahoo.com 06 Sep '08

06 Sep '08

anybody else having ffmpeg crash on ac3 decode? ffmpeg -i foo.ac3 foo.wav crashes on me using rev 15182 tripp

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H263 video encoding from a single frame
by ramon.poca＠androme.es 06 Sep '08

06 Sep '08

Hi there. I'm using ffmpeg for 3gp video encoding from a single frame. I'm currently using: FFMPEG -loop_input -r 12 -i $JPGFILE -i $AUDIOFILE\ -s qcif -b 128 -vcodec h263 -r 12 \ -acodec libamr_nb -ac 1 -ar 8000 -ab 12200 \ -shortest $TEMPVIDEO The question is, the video gets blurry aftter some time, I presume due to some artifact on the h263 encoding. Does someone know which would be the best options (to the h263 encoder) for the video to keep steady? -- *Ramon Poca Cos* /Senior Developer/ ramon.poca at androme.es <mailto:ramon.poca at androme.es>

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How to encode only working part of video via ffmpeg.
by irfan.nettech＠gmail.com 06 Sep '08

06 Sep '08

Hi guys, from last one month i am trying to find a way to encode only those part of video which is workable using ffmpeg. but failed. My scenario is if a video full size is 45 minutes and only 5 minutes of video is playable but normally ffmpeg shows 45 minute complete video and encode complete 45 minute later it can't be play on players. Now i want to encode only 5 minutes of playable part of video. Can any one help me how i will do this with ffmpeg. Waiting for response. Best Regards.

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Flipping image
by danflu＠uninet.com.br 06 Sep '08

06 Sep '08

Hello, Please, how can i flip an image upside-down using ffmpeg ? Is out there any sample code that ilustrates this ? Thank you very much Daniel

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Transparency is lost during recompilation wifth ffmpeg and x264
by m_aldemir＠yahoo.com 05 Sep '08

05 Sep '08

Hello, I have a FLV video encoded by Adobe After Effects using On2 VP6 encoder. I want to re-encode this video using x264 codec. FFMPEG can decode VP6 video, and encode x264. But after re-encoding the alpha channel transparency of the video is lost and the background is black. The input file name is onder1.flv, the output file name is onder1x264a.flv. Here are their properties and the command I use: ffmpeg -i onder1.flv FFmpeg version SVN-r14660, Copyright (c) 2000-2008 Fabrice Bellard, et al. configuration: --enable-gpl --enable-libvorbis --enable-liba52 --enable-libmp3lame --enable-libfaad --enable-libfaac --enable-pthreads --enable-libx264 --enable-libxvid --enable-shared libavutil version: 49.7.0 libavcodec version: 51.63.0 libavformat version: 52.19.0 libavdevice version: 52.0.0 built on Aug 7 2008 15:02:01, gcc: 4.1.2 20061115 (prerelease) (Debian 4.1.1-21) Seems stream 0 codec frame rate differs from container frame rate: 1000.00 (1000/1) -> 25.00 (25/1) Input #0, flv, from 'onder1.flv': Duration: 00:00:08.48, start: 0.000000, bitrate: 96 kb/s Stream #0.0: Video: vp6a, yuva420p, 536x576, 25.00 tb(r) Stream #0.1: Audio: mp3, 44100 Hz, stereo, s16, 96 kb/s Must supply at least one output file ffmpeg -i onder1x264a.flv FFmpeg version SVN-r14660, Copyright (c) 2000-2008 Fabrice Bellard, et al. configuration: --enable-gpl --enable-libvorbis --enable-liba52 --enable-libmp3lame --enable-libfaad --enable-libfaac --enable-pthreads --enable-libx264 --enable-libxvid --enable-shared libavutil version: 49.7.0 libavcodec version: 51.63.0 libavformat version: 52.19.0 libavdevice version: 52.0.0 built on Aug 7 2008 15:02:01, gcc: 4.1.2 20061115 (prerelease) (Debian 4.1.1-21) Input #0, flv, from 'onder1x264a.flv': Duration: 00:00:08.59, start: 0.000000, bitrate: 32 kb/s Stream #0.0: Video: h264, yuv420p, 536x576, 25.00 tb(r) Stream #0.1: Audio: mp3, 44100 Hz, mono, s16, 32 kb/s Must supply at least one output file ffmpeg -i onder1.flv -f flv -vcodec libx264 -r 25 -acodec libmp3lame -ac 1 -ar 44100 -ab 32k onder1x264a.flv Can I, somehow, preserve transparency? Or can someone advise me some other method of encoding transparent x264 flv video? Mustafa? Aldemir

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Add a watermark to a video?
by dave＠topekadesign.com 05 Sep '08

05 Sep '08

I am using VirtualDub to add a watermark to batches of videos and then using ffmpeg to convert them to FLV format for upload to a web site. Can I eliminate VirtualDub and use ffmpeg to add a watermark? I've been going through old messages in this group and searching the web, but I couldn't find a definitive answer. Thanks!

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