November 2013 - ffmpeg-user - lists.ffmpeg.org

Combining multiple MP3's?
by Gilles 03 Mar '14

03 Mar '14

3 2

Latest source doesn't support filter_complex?
by zenicanin 19 Feb '14

19 Feb '14

I just upgraded to the latest version of ffmpeg and keep getting Unrecognized option 'filter_complex'. Is this option really deprecated or is there some other problem? -- View this message in context: http://ffmpeg-users.933282.n4.nabble.com/Latest-source-doesn-t-support-filt… Sent from the FFmpeg-users mailing list archive at Nabble.com.

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AC3 encoding problem - wrong audio tag?
by Stefan Gofferje 14 Jan '14

14 Jan '14

Hi, I have recently changed my home video editing to Linux (kdenlive) to get finally completely rid of Windows. Now I'm trying to encode some home-video with ac3 sound. I do the testing/playing with a Pinnacle Showcenter network media player which is connected via fiber-optic cable to a Haman Kardon amplifier. When I play my the encoded file, the amp show "Dolby 2/0" and is silent. The Showcenter shows as audio type "Ogg". File shows RIFF (little-endian) data, AVI, 624 x 352, 23.98 fps, video: XviD, audio: (6 channels, 48000 Hz) If I check older files that work on the Showcenter, the output of file is: RIFF (little-endian) data, AVI, 624 x 352, 23.98 fps, video: XviD, audio: Dolby AC3 (stereo, 48000 Hz) So in my encoding, the "Dolby AC3" tag seems to be missing. I use ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers built on Jun 15 2012 15:33:11 with gcc 4.5.1 20101208 [gcc-4_5-branch revision 167585] configuration: --prefix=/usr --mandir=/usr/share/man --libdir=/usr/lib64 --shlibdir=/usr/lib64 --disable-stripping --enable-pthreads --enable-shared --enable-avfilter --disable-static --enable-libfaac --enable-libmp3lame --enable-libxvid --enable-libx264 --enable-nonfree --enable-postproc --enable-shared --enable-libdc1394 --enable-libtheora --enable-libschroedinger --enable-libvpx --enable-gpl --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-version3 --enable-x11grab libavutil 51. 54.100 / 51. 54.100 libavcodec 54. 23.100 / 54. 23.100 libavformat 54. 6.100 / 54. 6.100 libavdevice 54. 0.100 / 54. 0.100 libavfilter 2. 77.100 / 2. 77.100 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 15.100 / 0. 15.100 libpostproc 52. 0.100 / 52. 0.100 and my command-line is like ffmpeg -i video.mp4 -i left.wav -i right.wav -i surr_left.wav -i surr_right.wav -i center-wav -i lfe-wav -vcodec libxvid -s 624x352 -b:v 1100k -acodec ac3 -ar 48000 -ab 448k video.avi Any hints? -Stefan -- (o_ Stefan Gofferje | SCLT, MCP, CCSA //\ Reg'd Linux User #247167 | VCP #2263 V_/_ Heckler & Koch - the original point and click interface -------------------------------------------------------------------------------- This mail was scanned for malware by ClamAV (http://www.clamav.net/) --------------------------------------------------------------------------------

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Quicktime IMX encode failing on v2.1
by Steve Kelly 13 Jan '14

13 Jan '14

We're migrating from 0.7 to 2.1 (2.1 built from fully updated ports tree on FreeBSD 9.1) and experiencing some issues converting to Quicktime PAL IMX 50Mb/s. The workflow: is 1/ encode video 2/ encode audio 3/ mux to quicktime The video encode command we used previously is: /usr/local/bin/ffmpeg -i "Input.mpg" -threads 1 -vf "scale=720:576:1,pad=720:608:0:32" -vcodec mpeg2video -r 25 -pix_fmt yuv422p -minrate 50000k -maxrate 50000k -b:v 50000k -intra -flags +ildct+low_delay -dc 10 -flags2 +ivlc+non_linear_q -ps 1 -qmin 1 -qmax 3 -top 1 -bufsize 2000000 -rc_init_occupancy 2000000 -rc_buf_aggressivity 0.25 -an -y "Output.m2v" This fails with: Input #0, mpeg, from 'Input.mpg': Duration: 00:05:26.12, start: 0.957178, bitrate: 52933 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (4:2:2), yuv422p(tv), 720x576 [SAR 16:15 DAR 4:3], max. 50000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc Stream #0:1[0xa0]: Audio: pcm_dvd, 48000 Hz, stereo, s16, 1536 kb/s [NULL @ 0x8088fe020] [Eval @ 0x7fffffff8d80] Undefined constant or missing '(' in 'ivlc' [NULL @ 0x8088fe020] Unable to parse option value "ivlc+non_linear_q" [NULL @ 0x8088fe020] Error setting option flags2 to value +ivlc+non_linear_q. Output #0, mpeg2video, to 'Output.m2v': Stream #0:0: Video: mpeg2video, yuv422p, 720x608 [SAR 16:15 DAR 24:19], q=2-31, 200 kb/s, 90k tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (mpeg2video -> mpeg2video) Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height I found one suggestion that "flags 2 +ivlc+non_linear_q" should become "-flags2 -intra_vlc -non_linear_quant", so the command is now: /usr/local/bin/ffmpeg -i "Input.mpg" -vf "scale=720:576:1,pad=720:608:0:32" -vcodec mpeg2video -r 25 -pix_fmt yuv422p -minrate 50000k -maxrate 50000k -b:v 50000k -intra -flags +ildct+low_delay -dc 10 -flags2 -intra_vlc -non_linear_quant -ps 1 -qmin 1 -qmax 3 -top 1 -bufsize 2000000 -rc_init_occupancy 2000000 -rc_buf_aggressivity 0.25 -an -y "Output.m2v" This fails with: Input #0, mpeg, from 'Input.mpg': Duration: 00:05:26.12, start: 0.957178, bitrate: 52933 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (4:2:2), yuv422p(tv), 720x576 [SAR 16:15 DAR 4:3], max. 50000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc Stream #0:1[0xa0]: Audio: pcm_dvd, 48000 Hz, stereo, s16, 1536 kb/s [NULL @ 0x8088dba20] Unable to find a suitable output format for '1' 1: Invalid argument I can't find any info on the latest error with search, any suggestions appreciated.

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meaning of macroblock colors when using vis_mb_type option
by Wesley S. 29 Dec '13

29 Dec '13

Hi, I was wondering what all the different macroblock colors meant when using the vis_mb_type option? Kind regards, Wesley

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Unable to encode web with frame rates <1 fps
by Johnny Klonaris 22 Dec '13

22 Dec '13

Hi all… I'm trying to create videos with small fps values in both mp4 (libx264) and webm (libvpx) formats. I"m OK down to 1 fps, but anything less only works with libx264 - if I try to use libvpx, I get an error: Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height If the frame rate is >-= 1, or if I only use libx264, no problem. I'm specifying sub-second frame rates as a fraction (e.g. 1/10), but I've also tried decimals: "0.1". The runstring looks like this: /usr/local/bin/ffmpeg -y -r 1/10 -i .../Overlays/Frame-%05d.png -i ".../audio.aif" \ -codec:v libvpx -b:v 500k -codec:a libvorbis -qscale:a 5 -threads 3 -r 1/10 ".../QuickTest-media.web" \ -codec:v libx264 -profile:v baseline -movflags faststart -pix_fmt yuv420p -threads 3 -codec:a aac \ -strict -2 -r 1/10 ".../QuickTest-media.mp4" I've used various versions of ffmpeg - most recently 2.1.1: $ /usr/local/bin/ffmpeg -version ffmpeg version 2.1.1 built on Nov 23 2013 13:37:12 with llvm-gcc 4.2.1 (LLVM build 2336.11.00) configuration: --enable-libx264 --enable-gpl --enable-libvpx --enable-libtheora --enable-libvorbis libavutil 52. 48.101 / 52. 48.101 libavcodec 55. 39.101 / 55. 39.101 libavformat 55. 19.104 / 55. 19.104 libavdevice 55. 5.100 / 55. 5.100 libavfilter 3. 90.100 / 3. 90.100 libswscale 2. 5.101 / 2. 5.101 libswresample 0. 17.104 / 0. 17.104 libpostproc 52. 3.100 / 52. 3.100 My libvpx is 1.1.0. I'm on a Mac running OSX v10.8.5 I've installed with homebrew, pulling from git (that failed last time), and most recently configured and made from source. I've seen various hints online saying this should work - I just can't figure out what part I"m getting wrong. I've tried encoding separately - but no difference: libx264 is ok, libvpx throws an error. Full output from my run: ffmpeg version 2.1.1 Copyright (c) 2000-2013 the FFmpeg developers built on Nov 23 2013 13:37:12 with llvm-gcc 4.2.1 (LLVM build 2336.11.00) configuration: --enable-libx264 --enable-gpl --enable-libvpx --enable-libtheora --enable-libvorbis libavutil 52. 48.101 / 52. 48.101 libavcodec 55. 39.101 / 55. 39.101 libavformat 55. 19.104 / 55. 19.104 libavdevice 55. 5.100 / 55. 5.100 libavfilter 3. 90.100 / 3. 90.100 libswscale 2. 5.101 / 2. 5.101 libswresample 0. 17.104 / 0. 17.104 libpostproc 52. 3.100 / 52. 3.100 Input #0, image2, from '/Users/Johnny/dev/coLab/Group/Johnny/Page/QuickTest1/coLab_local/Overlays/Frame-%05d.png': Duration: 00:00:37.08, start: 0.000000, bitrate: N/A Stream #0:0: Video: png, rgba, 160x120, 25 fps, 25 tbr, 25 tbn, 25 tbc Guessed Channel Layout for Input Stream #1.0 : stereo Input #1, aiff, from '/Users/Johnny/dev/coLab/Group/Johnny/Page/QuickTest1/coLab_local/Nuggets1.aif': Metadata: comment : Duration: 00:15:27.62, start: 0.000000, bitrate: 1411 kb/s Stream #1:0: Audio: pcm_s16be, 44100 Hz, stereo, s16, 1411 kb/s [libvpx @ 0x7fb9d8861a00] v1.1.0 [libvpx @ 0x7fb9d8861a00] Failed to initialize encoder: Invalid parameter [libvpx @ 0x7fb9d8861a00] Additional information: g_timebase.num out of range [1..cfg->g_timebase.den] Output #0, webm, to '/Users/Johnny/dev/coLab/Group/Johnny/Page/QuickTest1/QuickTest1-media.webm': Stream #0:0: Video: vp8, yuva420p, 160x120, q=-1--1, 500 kb/s, 90k tbn, 0.10 tbc Stream #0:1: Audio: vorbis, 44100 Hz, stereo, fltp Output #1, mp4, to '/Users/Johnny/dev/coLab/Group/Johnny/Page/QuickTest1/QuickTest1-media.mp4': Stream #1:0: Video: h264, yuv420p, 160x120, q=-1--1, 90k tbn, 0.10 tbc Stream #1:1: Audio: aac, 44100 Hz, stereo, fltp, 128 kb/s Stream mapping: Stream #0:0 -> #0:0 (png -> libvpx) Stream #1:0 -> #0:1 (pcm_s16be -> libvorbis) Stream #0:0 -> #1:0 (png -> libx264) Stream #1:0 -> #1:1 (pcm_s16be -> aac) Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height If there's any more I should post - please let me know. -- Thanks in advance for any hints. -Johnny

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Best documentation web site ( or other source )
by Hans J. Albertsson 22 Dec '13

22 Dec '13

Considering being in the situation of having a seemingly straightforward problem at hand, but using ffmpeg so seldom that one really starts out in no-clue mode every time, what would be the best place for seeking ffmpeg docs to steer one in the right direction?? Like just recently I had a problem in deleting one audio stream ( a disinterested dubbed version of the original audio ) from an avi file, resulting in the remaining audio stream being deemed unsupported by all my media players. I just tried various remuxings at random w/o any special extra options and by chance hit on one that worked. Which leads me to believe that this particular remux by default includes redoing time stamps. I rarely do manual work with ffmpeg, so every time I have to start from scratch. I really would have liked some docs that could lead me in a more constructive way to "what to try and how to draw conclusions about the problem". And, afterwards, docs that would help me understand what actually happened. So, I think there needs to be multiple kinds of docs for cases like mine; Trouble-shooting guides; Given an error or problem message from ffmpeg, how to find out more about what the real problem is and how to make a guess at what to do about it. Reference manual organised by property/aspect of the media containers and streams. Reference manual organised by option/parameter/purpose of all parts of ffmpeg. Cheat sheets; A set of HowTos for various tasks, and a simple way to add a new recipe to the collection. Maybe all this exists already, I looked and found very little, but that could be just me.

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Fw: Re: Confusion about fieldmatch, decimate and framerate
by Nicholas Robbins 21 Dec '13

21 Dec '13

--- On Thu, 11/7/13, Carl Eugen Hoyos <cehoyos(a)ag.or.at> wrote: > From: Carl Eugen Hoyos <cehoyos(a)ag.or.at> > Subject: Re: [FFmpeg-user] Confusion about fieldmatch, decimate and framerate > To: ffmpeg-user(a)ffmpeg.org > Date: Thursday, November 7, 2013, 9:10 AM > Nicholas Robbins <nickrobbins > <at> yahoo.com> writes: > > > Uploaded to upload.ffmpeg.org/incoming as > sample-robbins.mkv > > The sample claims to be 60fps while it actually is 30fps. > Assuming you produced the mkv file from a MPEG original: > Is the problem also reproducible with the original mpeg > file? So I get the original file using mplayer's dumpstream. It gives me a VOB. ffprobe has this to say about the vob: Input #0, mpeg, from 'Magic.vob': Duration: 00:01:00.64, start: 0.280633, bitrate: 5533 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x480 [SAR 32:27 DAR 16:9], 29.67 fps, 59.94 tbr, 90k tbn, 59.94 tbc Stream #0:1[0x80]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s If I run mkvmerge on this then ffprobe says: Input #0, matroska,webm, from 'Magic-Merged.mkv': Metadata: creation_time : 2013-11-07 22:42:20 Duration: 00:01:00.76, start: 0.000000, bitrate: 5430 kb/s Stream #0:0: Video: mpeg2video (Main), yuv420p, 720x480 [SAR 32:27 DAR 16:9], SAR 186:157 DAR 279:157, 59.94 fps, 59.94 tbr, 1k tbn, 59.94 tbc (default) Stream #0:1: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s (default) If I run ffmpeg with fieldmatch on the original vob I get: Input #0, matroska,webm, from 'Magic-Fieldmatch.mkv': Metadata: ENCODER : Lavf55.12.100 Duration: 00:01:00.86, start: 0.000000, bitrate: 1457 kb/s Stream #0:0: Video: h264 (High), yuv420p, 720x480 [SAR 32:27 DAR 16:9], SAR 186:157 DAR 279:157, 29.97 fps, 29.97 tbr, 1k tbn, 59.94 tbc (default) Now adding in decimate Input #0, matroska,webm, from 'Magic-Fieldmatch-Decimate.mkv': Metadata: ENCODER : Lavf55.12.100 Duration: 00:00:48.76, start: 0.000000, bitrate: 1531 kb/s Stream #0:0: Video: h264 (High), yuv420p, 720x480 [SAR 32:27 DAR 16:9], SAR 186:157 DAR 279:157, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default) (wrong length) Adding in fps option: Input #0, matroska,webm, from 'Magic-Fieldmatch-Decimate-fps.mkv': Metadata: ENCODER : Lavf55.12.100 Duration: 00:01:00.89, start: 0.000000, bitrate: 1424 kb/s Stream #0:0: Video: h264 (High), yuv420p, 720x480 [SAR 32:27 DAR 16:9], SAR 186:157 DAR 279:157, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default) Seems like this is only a problem when I do Fieldmatching. I've never had this problem before when I don't use any filters or use only yadif. I would like an auto-magic step that make sure that the fps is set correctly. Thanks for all your help so far. At this point this is just icing on the cake.

3 32

x11grab video stalls every 30 seconds in screencapture
by Troy Gardner 11 Dec '13

11 Dec '13

We are using latest ffmpeg, for screencapture in the cloud. We are seeing odd dropped frame stalls in video capture every 30 seconds for about 1-2 seconds in duration. Audio is captured without stalls, and Audio Video sync is perfectly fine despite stalls. Hoping someone had ideas, this is driving us nuts and there's nothing obvious to explain it. This is the capture setting we are using. ffmpeg -f alsa -ac 2 -i pulse -f x11grab -r 30 -s 1024x768 -i :0.0 -acodec libvorbis -ar 44100 -vcodec libx264 -preset ultrafast -gp 0 -threads 0 ffg4.mkv This is the a drop frame test case capture with lossless x264 that shows dropped frames around 25-26 and significant stall errors at 30 and 60 seconds http://66.220.0.170/XFG4.mkv We get this trying different options, like keyframes. This is the output with flashsrv, which shows similar pause around 23 and 53 seconds, and indicates it's not a libx264 specific issue. flashsrv http://66.220.0.170/out.mov This is running on an instance with 16 vcpu + 16gb ram, on the Amazon AWS there is no noticeable background process that we can see at least that would explaing and happens regardless if it's debian, or ubuntu. This is the version of ffmpeg. ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers built on Jun 26 2012 12:42:06 with gcc 4.7.1 configuration: --arch=x86_64 --enable-avfilter --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static --enable-libx264 --enable-libvpx --enable-libmp3lame --enable-libfaac --enable-nonfree --enable-libopencore-amrwb --enable-libopencore-amrnb --enable-version3

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systematically encoding using x264
by Chourasia, Amit 05 Dec '13

05 Dec '13

Hello, I am looking for specific guidelines to encode many sequences of image to a video using x264 encoder. The image resolution and frame rate could be arbitrary (some sequences are 256x256 others could be 4kx4k or more), usually with images 1:1 aspect ratio. I would like to create multiple resolution/bitrate videos from these sequences which could be served on multiple devices as well as downloaded. The encoding time is not a very big concern but quality is a huge concern, as these sequences have scientific content. I am seeking some pointers on this and if there is someone out there who may be interested in collaborating that will be great. I'll be willing to open a set of sequences which could be used for tests, benchmarks, quality comparisons etc. Most useful documentation I have seen so far on this is at the following URL https://trac.ffmpeg.org/wiki/x264EncodingGuide https://trac.ffmpeg.org/wiki/StreamingGuide I appreciate any responses on this. Cheers -Amit

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