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

mpeg2 file
by Andre 03 May '11

03 May '11

I have 2 files. One is the video, file.m2v, the other is the audio, audio.wav. How do I join these files to make a mpeg2 file. What extension should I use: .mpg, .vob?

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Using RTP format for H264 streaming
by Mahmut Akcay 03 May '11

03 May '11

I'm having problem to re-stream H264 with RTP format. Below is the command line params and output. ./ffmpeg -i rtmp://flashmedia.nic.in:80/live/dd1 -vcodec copy -an -f rtp rtp:localhost:9000 ffmpeg version git-N-29571-g7d70d19, Copyright (c) 2000-2011 the FFmpeg developers built on May 3 2011 00:51:01 with gcc 4.2.1 (Apple Inc. build 5664) configuration: --enable-libfaac --enable-libmp3lame --enable-libx264 --enable-nonfree --enable-gpl libavutil 51. 2. 0 / 51. 2. 0 libavcodec 53. 3. 0 / 53. 3. 0 libavformat 53. 0. 3 / 53. 0. 3 libavdevice 53. 0. 0 / 53. 0. 0 libavfilter 2. 4. 0 / 2. 4. 0 libswscale 0. 14. 0 / 0. 14. 0 [flv @ 0x101012400] Estimating duration from bitrate, this may be inaccurate Input #0, flv, from 'rtmp://flashmedia.nic.in:80/live/dd1': Duration: N/A, start: 0.000000, bitrate: 64 kb/s Stream #0.0: Video: h264 (Baseline), yuv420p, 400x300 [PAR 1:1 DAR 4:3], 24 tbr, 1k tbn, 48 tbc Stream #0.1: Audio: mp3, 22050 Hz, stereo, s16, 64 kb/s Output #0, rtp, to 'rtp:localhost:9000': Metadata: encoder : Lavf53.0.3 Stream #0.0: Video: libx264, yuv420p, 400x300 [PAR 1:1 DAR 4:3], q=2-31, 90k tbn, 24 tbc Stream mapping: Stream #0.0 -> #0.0 SDP: v=0 o=- 0 0 IN IP6 ::1 s=No Name c=IN IP6 ::1 t=0 0 a=tool:libavformat 53.0.3 m=video 9000 RTP/AVP 96 a=rtpmap:96 H264/90000 a=fmtp:96 packetization-mode=1; sprop-parameter-sets=Z0KAH5ZSAyE/3gKhAAADAAEAAAMAMOBgAVXAABGMP8Y4wMACq4AAIxh/jHDtChUk,aMuNSA== Press [q] to stop encoding frame= 1540 fps= 27 q=-1.0 size= 6kB time=59.14 bitrate= 0.8kbits/s When I play the sdp file printed above I've got following: ./ffplay ./test.sdp -debug 5 ffplay version git-N-29571-g7d70d19, Copyright (c) 2003-2011 the FFmpeg developers built on May 3 2011 00:51:01 with gcc 4.2.1 (Apple Inc. build 5664) configuration: --enable-libfaac --enable-libmp3lame --enable-libx264 --enable-nonfree --enable-gpl libavutil 51. 2. 0 / 51. 2. 0 libavcodec 53. 3. 0 / 53. 3. 0 libavformat 53. 0. 3 / 53. 0. 3 libavdevice 53. 0. 0 / 53. 0. 0 libavfilter 2. 4. 0 / 2. 4. 0 libswscale 0. 14. 0 / 0. 14. 0 [NULL @ 0x10203b200] Format sdp probed with size=2048 and score=50 [sdp @ 0x10203b200] video codec set to: h264 [NULL @ 0x101863e00] RTP Packetization Mode: 1 [NULL @ 0x101863e00] Extradata set to 0x10102af80 (size: 58)!Unsupported bit depth: 0 [sdp @ 0x10203b200] Could not find codec parameters (Video: h264) [sdp @ 0x10203b200] Estimating duration from bitrate, this may be inaccurate ./test.sdp: could not find codec parameters I've tried to transcode the stream to mpeg4 and it's working, but with h264 it doesn't work. Am I missing anything? Thanks in advance mahmut

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RTSP keep-alive issue
by Pedro Oliva 03 May '11

03 May '11

Hi, I'm recording an IP camera RTSP stream. My app should record the stream indefinitely. Sometimes, ffmpeg stops recording after five or six minutes. I've found out that the IP camera rtsp server doesn't support GET_PARAMETER method (server returns 405 response), which is used to test client liveness. Perhaps this could be the reason of this behavior, but I don't understand why ffmpeg stops recording only in a few cases. Could anyone give me an explanation?

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No ffplay generated on ffmpeg 0.6.90-ro
by John Du 03 May '11

03 May '11

Dear FFmpeg team I am compling ffmpeg-0.6.90-rc0, and meeting the configure error on fedora os. But if i use ffmpeg 0.6.1, no such problem. #configure yasm not found, use --disable-yasm for a crippled build If you think configure made a mistake, make sure you are using the latest version from Git. If the latest version fails, report the problem to the ffmpeg-user(a)ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net. Include the log file "config.log" produced by configure as this will help solving the problem. Pls refer to the config.log Even I disable-yasm to compling . but the ffplay is not generated finally. How can I build and generate the ffplay? Regards, John Du Shenzhen QVOD technology Co. Ltd. 22A Building No.3, China Academy of Science & Technology Development, High-tech. South Street No.1, South District of High-tech Industrial Area, Shenzhen City. Tel: 86 3363 2699 Ext. 8110 Fax: 86 3363 2696 Cell: 86 150 1381 9009 E-mail: dujun(a)qvod.com Website: http://www.qvod.com

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h264 encoding/decoding GPU/cuda acceleration
by flora giannone 02 May '11

02 May '11

Hello I would like to know if exists somehow to run encoding / decoding h264 with GPU/cuda acceleration. Thank you very much flora

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Fw: Unable to get correct decoded file
by Hardik Sharma 02 May '11

02 May '11

Thanks Leo but still I am not getting desired output. My decoded video output is with very slow frame rate (even after mentioning frame rate as 30fps) and there is some problem in video frames as per appearance concern. It's different from the input yuv video even without much loss. Please tell me if I should include more format option while encoding or decoding video sequence. I really appreciate your help. Thanks. Regards, Hardik Sharma --- On Sat, 30/4/11, Hardik Sharma <hardik.sharma22(a)yahoo.com> wrote: >From: Hardik Sharma <hardik.sharma22(a)yahoo.com> >Subject: Unable to get correct decoded file >To: "ffmpeg" <ffmpeg-user(a)ffmpeg.org> >Date: Saturday, 30 April, 2011, 12:16 AM > > >Hi, > >I am a new bee with Ubuntu and ffmpeg both so please help me with this issue. I encoded the yuv video to h264 by following command- > ffmpeg -f rawvideo -r 30 -b 256k -s 352x288 -i silent_cif.yuv -vcodec libx264 -b 256k -s 352x288 -preset slow -f h264 -threads 0 silent264.h264 > >But I don't think I am getting correct encoded file as after decoding back to yuv video, I am only getting 2 frames and that too wrong frames. > >Command line for decoding- > ffmpeg -r 30 -b 256k -s 352x288 -i output.h264 -vcodec libx264 -b 256k -s 352x288 -preset slow -f rawvideo -threads 0 slient.yuv > >Please tell me my mistake in command line. I really appreciate your help. Thanks. > >Regards, >Hardik Sharma > >

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Re: [FFmpeg-user] Copyright issues iFFmpeg
by Johannes Frotscher 02 May '11

02 May '11

Another case of stupid abuse of fundamentals, "Free Software GPL", yeah right as in free to plunder, especially the intelligence of users and developers. Steve Jobs: "Good artists copy, great artists steal.", classic paradigm. I know I should not start a discussion of legality here, but this is one of the most prominent cases going well beyond anything. GPL is shooting itself in its left foot if you ask me, what outrageous stupidity. GPL is really a virus, as stated in the Wikipedia article of yours: http://en.wikipedia.org/wiki/GPL#Criticism How else can there be more and even more commercialism, and misinformation, miseducation as on the web right now. And don't tell me its because of the increasing number of users, that is the true bullhog here. The clear distinction of free and unfree software from its origin has been contaminated, by its own people. FreeBSD is the only true freedom act that ever happened to all Unices. Its also the reason why everything is getting patched and cracked beyond degree out there, because its an anarchic state, people wake up. And to correct again: http://www.gnu.org/licenses/gpl-faq.html#MereAggregation The very source of the definition my friends, and if those programs use numerous ever-never-stop-expanding-since-10-years-APPLE-APIs-of- which-iFFmpegGUI-was-using-ffmpeg-selling-it, which have their own copyrights, and license agreements, then I am in fact extending the functionality of the program, thank you no applause please. BTW nice cases of its former Hall-of-Shame here: http://news.ycombinator.com/item?id=790316 Intelligence is conceit, wisdom is bliss. The funny thing is, its actually like the even cranker counter-part of the capitalist markets out there, almost pinpointing its weaknesses. Its not just a matter of intellectual property, its a matter of the legal-economic framework, which define the finale of politics and ideology, hence the dynamics of our future.

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Can anyone explain the error I am seeing when trying to do rtsp streaming
by Arnie Bearak 02 May '11

02 May '11

When I try to run the following command to do rtsp streaming ffmpeg -r 1 -i frame_%05d.pgm -b 18000 -vcodec libx264 -y -vpre slow http://condor1:8090/feed1.ffm I get the following results Input #0, image2, from 'frame_%05d.pgm': Duration: 00:00:24.00, start: 0.000000, bitrate: N/A Stream #0.0: Video: pgm, gray, 3332x332, 1 fps, 1 tbr, 1 tbn, 1 tbc [buffer @ 0x12b11050] w:3332 h:332 pixfmt:gray [scale @ 0x12b11430] w:3332 h:332 fmt:gray -> w:640 h:160 fmt:yuv420p flags:0xa0000004 [buffer @ 0x12b14b20] w:3332 h:332 pixfmt:gray [ffsink @ 0x12b16400] auto-inserting filter 'auto-inserted scaler 0' between the filter '(null)' and the filter 'out' Impossible to convert between the formats supported by the filter 'auto-inserted scaler 0' and the filter 'out' Error opening filters! [flv @ 0x12b16d60] automatic thread number detection not supported by codec, patch welcome Output #0, ffm, to 'http://condor1:8090/feed1.ffm': Stream #0.0: Video: flv, yuv420p, 640x160, q=1-5, 200 kb/s, 1000k tbn, 15 tbc Stream #0.1: Video: [0][0][0][0] / 0x0000, (null), q=0-0, 102400 kb/s, 1000k tbn Stream mapping: Stream #0.0 -> #0.0 Stream #0.0 -> #0.1 Error while opening encoder for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height *** glibc detected *** /home/champ/deps/ffmpeg-HEAD-60c68c0/ffmpeg: free(): invalid pointer: 0x0000000012b13220 ***

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to .mkv conversion fails.
by ranjini raguu 02 May '11

02 May '11

Hello im using ffmpeg for conversions... my prob is whn ever i try to convert any video files to .mkv it fails.... this is the parameter im passing for the conversion. -vcodec libx264 -b 1250kb -acodec libmp3lame -ar 44100 -ab 160kb -ac 2 is there any prob with this conversion in default???? thanks for any replies....

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Question about the LGPL
by ARTRU LUDOVIC p0802080 02 May '11

02 May '11

Hello I'm a French student doing a work experience placement and I have to program a software using videos. But the videos are in .avi and I have to convert it to .flv That's why I found your software. I download it with Windows XP and it works (I haven't already writte a line of code) But the finality of my work experience placement is commercial software. I have some question about the right of using your software. Can I use the ffmpeg.exe if I only use it to convert videos to .flv? (The software will be write in VB.net) Thanks. ARTRU Ludovic IUT Informatique 2G2 IEM

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