youtube-dl already contains this functionality – just specify that you want mp3: youtube-dl -x –audio-format mp3 https://www.youtube.com/watch?v=BaW_jenozKc Replace https://www.youtube.com/watch?v=BaW_jenozKc with your actual URL.
All videos for FFMPEG concatenate should have matching encoding, fps and so on, otherwise you’ll get unexpected results. I guess, it’s hard to get by without re-encoding if your videos come from different sources. I had to look though lots of solutions, the working ones would suggest converting your videos to the same intermediate format … Read more
For those coming to this old question: only mp4 is required nowadays! http://caniuse.com/#feat=mpeg4
You can still record videos from the command line: adb shell screenrecord /sdcard/video.mp4 When you are done recording, press Ctrl+C. Then you can copy the file to your computer (current folder) adb pull /sdcard/video.mp4 If you want you can delete the file from the sdcard adb shell rm /sdcard/video.mp4
Good graph from this 2011 article: This is a tough call, but honestly, WebM is probably going to win out in the end considering it’s Google’s project. Ogg will most likely stay what it is now in its audio counterpart– an open standard that is not widely-adopted even though it’s superior in some ways. H.264 … Read more
I found three commands that helped me reduce the delay of live streams. The first command its very basic and straight forward, the second one it’s been combined with other options which might work differently on each environment and the last command it is a hacky version that I found in the documentation It was … Read more
You can use ffmpeg to convert to WebM. Make sure to compile it with the –enable-libvpx and –enable-libvorbis flags (see FFmpeg compile guides), or visit the FFmpeg Download page for links to builds that include support. After that, you can use the following command (I’m using input.flv as my example input file): ffmpeg -i input.flv … Read more
As your input file report a strange frame rate value 1k fps coming from the tbs and tbr value (look here for their definition) the encoder generate a different result, 16k tbn, 1k tbc (default) So by calling : ffmpeg -fflags +genpts -i 1.webm -r 24 1.mp4 You configure ffmpeg to generate new pts (a.k.a … Read more