BreadCrumbs: Ffmpeg

Ffmpeg

From Luke Jackson

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Direct Download M3U8 file playlist stream and convert into local MP4 video file

echo "Enter m3u8 link:";read link;echo "Enter output filename:";read filename;ffmpeg -i "$link" -bsf:a aac_adtstoasc -vcodec copy -c copy -crf 23 $filename.mp4

-bsf:a aac_adtstoasc

    bsf = (bit stream filter)
    use aac_adtstoasc bsf for a audio streams, this is need if .m3u8 file consists with .ts files and output is .mp4
    reference https://ffmpeg.org/ffmpeg-bitstream-filters.html#aac_005fadtstoasc

-c copy -vcodec copy

    skip codec (encode and decode), just demux and mux
    I guess .ts and .mp4, for video stream, they are both H.264 codec, just guess.
    reference https://ffmpeg.org/ffmpeg.html#Stream-copy

-crf 50

    reference https://trac.ffmpeg.org/wiki/Encode/H.264#CRFExample
    the example shows -c:a copy did not re-encode, guess this option is not needed here.
    And 0 is lossless, 23 is the default, and 51 is worst quality possible 😢

https://gist.github.com/tzmartin/fb1f4a8e95ef5fb79596bd4719671b5d

Add Freshrpms repo

http://ftp.freshrpms.net/pub/freshrpms/fedora/linux/4/freshrpms-release/freshrpms-release-1.1-1.fc.noarch.rpm

yum install ffmpeg-devel

Dependencies Resolved
Transaction Listing:
  Install: ffmpeg-devel.i386 0:0.4.9-0.20050427.1.1.fc3 - freshrpms

Performing the following to resolve dependencies:
  Install: SDL-devel.i386 0:1.2.7-8 - base
  Install: a52dec-devel.i386 0:0.7.4-7.1.fc3.fr - freshrpms
  Install: alsa-lib-devel.i386 0:1.0.6-8.FC3 - updates-released
   Install: faac-devel.i386 0:1.24-1.1.fc3.fr - freshrpms
  Install: faad2-devel.i386 0:2.0-4.1.fc3 - freshrpms
  Install: ffmpeg.i386 0:0.4.9-0.20050427.1.1.fc3 - freshrpms
  Install: fontconfig-devel.i386 0:2.2.3-5 - base
  Install: imlib2-devel.i386 0:1.2.1-2.fc3 - extras
  Install: lame.i386 0:3.96.1-2.1.fc3.fr - freshrpms
  Install: lame-devel.i386 0:3.96.1-2.1.fc3.fr - freshrpms
  Install: libogg-devel.i386 2:1.1.2-1 - base
  Install: libvorbis-devel.i386 1:1.1.0-1 - base
  Install: xorg-x11-devel.i386 0:6.8.2-1.FC3.45.2 - updates-released
  Install: xvidcore-devel.i386 0:1.0.3-1.1.fc3.fr - freshrpms
Total download size: 11 M
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Retrieved from "http://wiki.ljackson.us/Ffmpeg"

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Ffmpeg

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+Direct Download M3U8 file playlist stream and convert into local MP4 video file
+ echo "Enter m3u8 link:";read link;echo "Enter output filename:";read filename;ffmpeg -i "$link" -bsf:a aac_adtstoasc -vcodec copy -c copy -crf 23 $filename.mp4
+<pre>
+-bsf:a aac_adtstoasc
+    bsf = (bit stream filter)
+    use aac_adtstoasc bsf for a audio streams, this is need if .m3u8 file consists with .ts files and output is .mp4
+    reference https://ffmpeg.org/ffmpeg-bitstream-filters.html#aac_005fadtstoasc
+-c copy -vcodec copy
+    skip codec (encode and decode), just demux and mux
+    I guess .ts and .mp4, for video stream, they are both H.264 codec, just guess.
+    reference https://ffmpeg.org/ffmpeg.html#Stream-copy
+-crf 50
+    reference https://trac.ffmpeg.org/wiki/Encode/H.264#CRFExample
+    the example shows -c:a copy did not re-encode, guess this option is not needed here.
+    And 0 is lossless, 23 is the default, and 51 is worst quality possible 😢
+</pre>
+https://gist.github.com/tzmartin/fb1f4a8e95ef5fb79596bd4719671b5d
 Add Freshrpms repo
 </pre>
-== MEncoder ==
- yum install menencoder
-=== Joining the video clips together ===
-Mencoder doesn't have a fancy gui for you to get used to, but is a command line application, meaning we just type the commands in on a command line.
-To join the files "1.avi" and "2.avi" into the joined file "joined.avi" simply type in the following command
- mencoder -oac copy -ovc copy -o "joined.avi" "1.avi" "2.avi"
-In the above command -oac copy means "copy the audio stream", -ovc copy means "copy the video stream", and -o "joined.avi" means "output to file joined.avi".
-If you want to join more than two clips, then just list as many clips as you want, in the order you want them joined. Remember that the clips need to all be encoded exactly the same, else it won't work.
-If your joined clip is going to be larger that 1024Mb ( 1 gigabyte ) then when you come to play back the joined clips, some media players get confused as to how long the clip lasts, so add -noodml to the command line, eg.
- mencoder -oac copy -ovc copy -noodml -o "joined.avi" "1.avi" "2.avi"
-Also note that most movie players cannot play videos that are larger than 2GB (2048MB) in size, irrespective of whether they are .avi, .mpg or .vob.
-It's that simple, and when you are finished you can just delete the mplayer folder, and the application is removed - just remember to move video clips out of the folder first !
 [[Category:Windows XP]]
 [[Category:Linux]]
 [[Category:Mac OS X]]