Date: Sat, 06 Dec 2014 18:05:37 -0600 From: "William A. Mahaffey III" <wam@hiwaay.net> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Dropping audio in ffmpeg conversion Message-ID: <548399D1.8070405@hiwaay.net> In-Reply-To: <CAFuo_fxB6Pd1bw5rxakH6SeV=CC7ZaUyQn2dEb=bPH1v4Som8w@mail.gmail.com> References: <20141206234358.0b17f55f.freebsd@edvax.de> <CAFuo_fxB6Pd1bw5rxakH6SeV=CC7ZaUyQn2dEb=bPH1v4Som8w@mail.gmail.com>
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On 12/06/14 17:17, Waitman Gobble wrote: > On Sat, Dec 6, 2014 at 2:43 PM, Polytropon <freebsd@edvax.de> wrote: > >> I'm searching for a convenient way to drop audio from >> an AVI file (video and audio) upon conversion to MP4. >> My tool of choice is ffmpeg, which works perfectly fine >> with the default options: >> >> % ffmpeg -i in.avi out.mp4 >> >> The quality loss, the "pixelated" and "blocky" output >> is what I expect, and the result file is small. I just >> can't find a way to get rid of audio (which I don't >> need). Reading "man ffmeg" told me about "sinks" which >> "do nothing", but I'm too stupid to conclude how to use >> them properly. What I want to have is a converted video >> with no audio track at all (also smaller file size). >> >> Can ffmpeg do this, or do I have to "preprocess" the >> input file with mencoder somehow? >> >> Does anybody know how to proceed? >> >> >> >> -- >> Polytropon >> Magdeburg, Germany >> Happy FreeBSD user since 4.0 >> Andra moi ennepe, Mousa, ... >> _______________________________________________ >> freebsd-questions@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-questions >> To unsubscribe, send any mail to " >> freebsd-questions-unsubscribe@freebsd.org" >> > > I think it's -an switch. > Out of curiosity from this thread, I decided to install ffmpeg & possibly play around w/ it. Here's the transcript: [root@kabini1, /etc, 12:20:50pm] 332 % pkg install -y ffmpeg Updating FreeBSD repository catalogue... Fetching meta.txz: 100% 968 B 1.0k/s 00:01 Fetching digests.txz: 100% 2 MB 341.9k/s 00:06 Fetching packagesite.txz: 100% 5 MB 354.7k/s 00:15 Removing expired repository entries: 100% Processing new repository entries: 100% FreeBSD repository update completed. 23602 packages processed: 17694 updated, 147 removed and 41 added. Updating FreeBSD_new_xorg repository catalogue... FreeBSD_new_xorg repository is up-to-date. nspluginwrapper-1.4.4_4 is locked and may not be modified The following 15 packages will be affected (of 0 checked): New packages to be INSTALLED: ffmpeg: 2.3.5_3,1 [FreeBSD] linux_base-f10: 10_9 [FreeBSD] linux-f10-xorg-libs: 7.4_1 [FreeBSD] linux-f10-fontconfig: 2.6.0_1 [FreeBSD] linux-f10-expat: 2.0.1_1 [FreeBSD] linux-f10-pango: 1.28.3_1 [FreeBSD] linux-f10-png: 1.2.37_2 [FreeBSD] linux-f10-cairo: 1.8.0_3 [FreeBSD] linux-f10-gtk2: 2.14.7_5 [FreeBSD] linux-f10-tiff: 3.8.2 [FreeBSD] linux-f10-jpeg: 6b [FreeBSD] linux-f10-atk: 1.24.0_1 [FreeBSD] schroedinger: 1.0.11_3 [FreeBSD] libx264: 0.142.2455 [FreeBSD] opencv-core: 2.4.9_1 [FreeBSD] The process will require 209 MB more space. 33 MB to be downloaded. Fetching ffmpeg-2.3.5_3,1.txz: 100% 8 MB 380.5k/s 00:24 Fetching linux_base-f10-10_9.txz: 100% 16 MB 366.0k/s 00:48 Fetching linux-f10-xorg-libs-7.4_1.txz: 100% 1 MB 316.6k/s 00:05 Fetching linux-f10-fontconfig-2.6.0_1.txz: 100% 118 kB 121.1k/s 00:01 Fetching linux-f10-expat-2.0.1_1.txz: 100% 65 kB 67.2k/s 00:01 Fetching linux-f10-pango-1.28.3_1.txz: 100% 274 kB 281.3k/s 00:01 Fetching linux-f10-png-1.2.37_2.txz: 100% 150 kB 154.2k/s 00:01 Fetching linux-f10-cairo-1.8.0_3.txz: 100% 353 kB 361.8k/s 00:01 Fetching linux-f10-gtk2-2.14.7_5.txz: 100% 3 MB 351.0k/s 00:09 Fetching linux-f10-tiff-3.8.2.txz: 100% 241 kB 247.5k/s 00:01 Fetching linux-f10-jpeg-6b.txz: 100% 115 kB 118.1k/s 00:01 Fetching linux-f10-atk-1.24.0_1.txz: 100% 144 kB 148.0k/s 00:01 Fetching schroedinger-1.0.11_3.txz: 100% 396 kB 405.9k/s 00:01 Fetching libx264-0.142.2455.txz: 100% 407 kB 208.4k/s 00:02 Fetching opencv-core-2.4.9_1.txz: 100% 1 MB 401.3k/s 00:04 Checking integrity... done (11 conflicting) Checking integrity... done (0 conflicting) Conflicts with the existing packages have been found. One more solver iteration is needed to resolve them. The following 5 packages will be affected (of 0 checked): Installed packages to be REMOVED: nspluginwrapper-1.4.4_4 New packages to be INSTALLED: schroedinger: 1.0.11_3 [FreeBSD] libx264: 0.142.2455 [FreeBSD] opencv-core: 2.4.9_1 [FreeBSD] ffmpeg: 2.3.5_3,1 [FreeBSD] The process will require 49 MB more space. nspluginwrapper-1.4.4_4 is locked and may not be modified whew !!!! that took (43.233 cpu + 5.569 sys) sec., 2:50.10 elapsed time tot, 28.6% CPU efficiency (207 text, 2549 data, 46500 max) KB, (0+1411) io, 7318 pfs + 0 swaps [root@kabini1, /etc, 6:03:18pm] 333 % in short, it tried to install linux-f10, rather than relying on linux-c6 .... pkg bug ? ffmpeg package bug ? pilot error ? TIA for any clarifications .... -- William A. Mahaffey III ---------------------------------------------------------------------- "The M1 Garand is without doubt the finest implement of war ever devised by man." -- Gen. George S. Patton Jr.
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