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

Convert some hundreds files to a H264
by marcos rebelo 18 May '11

18 May '11

Hi all I was giving some hundreds of files (more will come) with different formats (div, avi, mov, ...) and different sizes to be converted to H264 with: a maximum width 720, -b 500k -bt 500k -acodec libfaac Is there any simple configuration, configurable script or something like that, that is able of processing this different files without the human interaction. I'm a Perl developer, I may program something if is simple. CPU and time isn't a problem, so there is no problem if I need (I would prefer) to pass 2 times. Thanks for any help Best Regards Marcos Rebelo -- Marcos Rebelo http://www.oleber.com/ Milan Perl Mongers leader https://sites.google.com/site/milanperlmongers/ Webmaster of http://perl5notebook.oleber.com

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convesion to mkv fails
by mouli s 17 May '11

17 May '11

Hello, Wat is the best way for the conversion of any files to mkv ??? i tried all the following... wat happened is the converted file cannot be opened.... "C:\Program Files\BullsHit Converter\Lib\FFmpeg\ffmpeg.exe" -i "C:\Documents and Settings\Desktop\Samples\video\Wild.wmv" -y "C:\Documents and Settings\broov\Desktop\ConversionSamples\video\Wild.mkv" also tried using some values... "C:\Program Files\BullsHit Converter\Lib\FFmpeg\ffmpeg.exe" -i "C:\Documents and Settings\Desktop\Samples\video.mp4" -y -vcodec libx264 -b 1250kb -acodec libmp3lame -ar 44100 -ab 160kb -ac 2 "C:\Documents and Settings\broov\Desktop\Samples\video.mkv" the converted video file cannot be opened.... wats the prob in this convertion ????? thanks for any replies...

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Need Help in Stripping Down ffmpeg.c transcode
by Aditya 17 May '11

17 May '11

for a simple video format conversion. 1 If i input a video file. the parse_options function takes the arguments translates and assigns the video encode values 2. the parse_option function calls and initializes the video output - do_video_out 3. the parse_options function calls and initializes the audio output -do_audio_out 4. the transcoding function is called which takes in the arguments got by the parsed_options function. 5. the trans coding function does a whole lot of processing with error checks ---- some of which might not be needed for basic transcode. 6. output_packet is called at /* at the end of stream, we must flush the decoder buffers */ 7. from the out_packet the data is written to the file. The the areas where i see the reduction of code is the input options. if i preset them and initialize the output/codec/streams the transcoding if limited to just video transcoding - not considering the subtitles or error checks.. How do i simplify the ffmpeg.c can any one help me do this?

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slice-max-size for h.264 in ffmpeg
by Hardik Sharma 17 May '11

17 May '11

Can you help me. Please let me know how I can add the NAL size control as I am new to ffmpeg and trying to do some experiments with it. Thanks Regards, Hardik Sharma On 5/16/11 4:40 PM, Hardik Sharma wrote: >Hi, >>Does ffmpeg support an option like ‘slice-max-size’ for H.264 ? >>I know that the x264 encoder supports a parameter called >‘slice-max-size’, running ‘x264 –fullhelp’ reveals the following: >--slice-max-size <integer> Limit the size of each slice in bytes >>Is it the case that while ffmpeg does not support any such option as >yet, it will/may support such an option. >>Is there any way by which I can control NALU size? Thanks. It doesn't currently, but it should be easy to add. -- Baptiste COUDURIER Key fingerprint 8D77134D20CC9220201FC5DB0AC9325C5C1ABAAA FFmpeg maintainer http://www.ffmpeg.org

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slice-max-size for h.264 in ffmpeg
by Hardik Sharma 17 May '11

17 May '11

Hi, Does ffmpeg support an option like ‘slice-max-size’ for H.264 ? I know that the x264 encoder supports a parameter called ‘slice-max-size’, running ‘x264 –fullhelp’ reveals the following: --slice-max-size <integer> Limit the size of each slice in bytes Is it the case that while ffmpeg does not support any such option as yet, it will/may support such an option. Is there any way by which I can control NALU size? Thanks. Regards, Hardik Sharma

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Re: [FFmpeg-user] how do I correct a differing frame rate?
by phil curb 17 May '11

17 May '11

no but i'd still like to be able to remux the file so ffmpeg -i doesn't give that error about the frame rate. I just don't know the line to do it.. ---------------------------------------- On 2011.05.16 05:35 PM, phil curb wrote: > When I run ffmpeg -i on this FLV file, it says > > Seems stream 0 codec frame rate differs from container frame rate: 59.94 (2997/5 > 0) -> 29.92 (359/12) > > How do I fix this file so that it doesn't say that? >http://www.sendspace.com/file/a4hzyc Remux? I've found those messages to be quite harmless, but then again, I've never really worked with FLV. Are you actually having any problems with the file?

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Installation Problems
by Grant Smith 17 May '11

17 May '11

I'm trying to install ffmpeg on Ubuntu 10.04 using the tutorial found @ http://ubuntuforums.org/showpost.php?p=9868359&postcount=1289 I get to the portion regarding the actual install of ffmpeg and I get the following error: ERROR: libmp3lame >= 3.98.3 not found 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. The link to my config.log file is http://pastebin.com/wsJYFe5e. It's set to expire in ~20 hours. Any advice on this problem would be GREATLY appreciated. Thank you, Grant Smith A+, Network+, MCP x 2, BSIT/VC, MIS Phone: +1.317.560.4457

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how do I correct a differing frame rate?
by phil curb 17 May '11

17 May '11

When I run ffmpeg -i on this FLV file, it says Seems stream 0 codec frame rate differs from container frame rate: 59.94 (2997/5 0) -> 29.92 (359/12) How do I fix this file so that it doesn't say that? http://www.sendspace.com/file/a4hzyc

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understanding copy flag
by Rick C. 17 May '11

17 May '11

Hello, I was making a few tests using the following syntax: ffmpeg -i original.avi -acodec copy -vcodec copy output.avi To my surprise the results were not very good (mainly just the audio side I believe). Am I wrong in thinking this should work as a passthrough? I tried the same with .mp4 and .mpg and the results were what I expected. I didn't notice anything significant from the output log so I didn't post anything. Any advice would be great. Thanks! rc

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Solved: Fwd: vlc-troubles with git-N-29534-g66b1f21
by Reindl Harald 16 May '11

16 May '11

fyi: this builf from today, oldabi works well on fedora 13/14 without any issues ecnoding and/or vlc, the first build since 2010-03-31 and i am happy again :-) ffmpeg version git-N-29954-g33651e3, Copyright (c) 2000-2011 the FFmpeg developers built on May 17 2011 00:31:33 with gcc 4.5.1 20100924 (Red Hat 4.5.1-4) -------- Original-Nachricht -------- Betreff: [FFmpeg-user] vlc-troubles with git-N-29534-g66b1f21 Datum: Sat, 07 May 2011 20:40:56 +0200 Von: Reindl Harald <h.reindl(a)thelounge.net> Antwort an: FFmpeg user questions and RTFMs <ffmpeg-user(a)ffmpeg.org> Organisation: the lounge interactive design An: Mailing-List ffmpeg <ffmpeg-user(a)ffmpeg.org> today (after some off-list) explanations (thanks again) i got a in the first moment working ffmpeg with "oldabi" git-N-29534-g66b1f21 encoding works wonderful with several formats but vlc-1.9.1 from rpmfusion (Fedora 14) says there are no decoders for all formats except .vob i can confirm that this ffmpeg-build is the problem because after downgrade to our latest working snapshot from 2011-03-31 the problem went away and also a lot of test-videos encoded with git-N-29534-g66b1f21 playing without any issue i wonder that even a "rpmbuild --rebuild vlc-rpmfusion.src.rpm" did not solve the problem, so is there any known issue? -- Mit besten Grüßen, Reindl Harald the lounge interactive design GmbH A-1060 Vienna, Hofmühlgasse 17 CTO / software-development / cms-solutions p: +43 (1) 595 3999 33, m: +43 (676) 40 221 40 icq: 154546673, http://www.thelounge.net/ http://www.thelounge.net/signature.asc.what.htm

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