Tutorial: Webstreams, lossless conversion; editing with Avidemux
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Post: #1 Zuletzt bearbeitet: 08.03.2014, 17:01 29.07.2013, 12:59 Tutorial: Webstreams, lossless conversion; editing with Avidemux
Hello everybody,
I've written a short and (hopefully) easy to understand tutorial for beginners. It includes: - Recording webstreams with RTMPDump - Lossless conversion of FLV (Flash Video) to mp4/mkv - Simple editing with Avidemux - High Quality screenshots with FFmpeg [Versteckter Link - Registrierung notwendig] I hope it's useful for some of you to learn and understand the most essential basics! If you have some questions, don't hesitate to ask! Thank you for your time and a special thanks from my side to switchblade123 for sharing his streamcodes! Download (PDF-File 2,1MB): [Versteckter Link - Registrierung notwendig] |
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brudgon wrote:hi guys my rtmpdumphelper failed to attached to firefox can someone please help me to solve this problem? run it then hit F8 and open up the add support for browser option. select the last instance of firefox and apply it... you will see that you should get multiple instances of failed to attach. but at least 1 or 2 that connect successfully. then just go the the site and you should see your links show up as normal. if they dont, hit F9 and change the host server. if it still doesnt work there either a conflict with your firewall, another applet or firefox is now blocking it (you may need to reduce the security settings from high to medium in exporers internet options, assuming your using windows). |
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Post: #96 Zuletzt bearbeitet: 19.02.2015, 05:52 18.02.2015, 09:39 Re: Tutorial: Webstreams, lossless conversion; editing with Avidemux
simple question... why are you converting a 25 fps stream into a 40+fps 1?
in the hope of doing what? from what i gather your converting a 1280x720 25fps @1000kbps with an audio sample rate of 48.000hz @16bit on 2 channels... seems to me because your adding 15+ extra fps is likely reason your having sync issues. also if your re-encoding at 1000kbps like the example above, it will cause degredation issues as its an average, some frames will take less some slightly more and your not accounting for this variance which is likely the reason for the quality drop. so try encoding at 1200kbps to give you some headroom. as an example i have upped 2 short etv grabs. 1 original flv grabbed with rtmpdump the other the converted file to mpeg that is slightly smaller, converted to h264 mpeg format. theres no issues with syncing or any perceived drop in quality... [Versteckter Link - Registrierung notwendig] [Versteckter Link - Registrierung notwendig] check em out... while i convert my files with avs video converter (i like the interface) the same basic procedure will work on avidmux. |
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hi guys my rtmpdumphelper failed to attached to firefox can someone please help me to solve this problem?
thanks in anyway |
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i know ffmpeg is the right way but for me is too complicated to use in a few word i understood nothing about ffmpeg
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Post: #93 Zuletzt bearbeitet: 15.12.2014, 11:26 15.12.2014, 11:23 Re: Tutorial: Webstreams, lossless conversion; editing with Avidemux
Sorry to say this, but dont use Avidemux to edit. It cannot preserve frame timings when outputing.
Recorded ETV TV live stream this morning [Versteckter Link - Registrierung notwendig] Don't rely on frame rate notification And ended up with this (Frame timings) from recorded stream (note second number) Frame duration ms 1027 40 1067 40 1107 40 1147 40 1187 40 1227 40 1267 40 1307 40 1347 40 1387 40 1427 40 1467 40 1507 40 1547 40 .. .. 3959 40 4002 43 4041 39 4079 38 4119 40 4159 40 4205 46 4241 36 4279 38 4319 40 4364 45 4402 38 4440 38 4480 40 4523 43 4560 37 4600 40 4640 40 .. .. 6027 40 6067 40 6107 40 6147 40 6187 40 6227 40 6267 40 6307 40 6347 40 6387 40 6427 40 6467 40 6507 40 6547 40 6587 40 6627 40 6667 40 6707 40 .. .. 7600 36 7640 40 7680 40 7723 43 7761 38 7801 40 7839 38 7883 44 7919 36 7959 40 8000 41 8043 43 8082 39 8120 38 8160 40 8204 44 8242 38 8281 39 8320 39 8363 43 Verfified using two methods FFmpeg probe and Pts using hex editor |
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This is a typical Avidemux bug with h263/264 files.
 You can try to fix it with the time-shift option, but using it is a trial and error thing. Select a scene when someone speaks on the mike so you can see wether it already fits or you have to adjust the value again (ms=milliseconds). [Versteckter Link - Registrierung notwendig] |
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vappiano68 wrote:brudgon wrote:hi guys can please someone to help me with avidemux 2.6? perfectly sync for all the duration of the video |
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brudgon wrote:hi guys can please someone to help me with avidemux 2.6? Unfortunately now I have no time. I can write a simple guide at the end of the next week. Only one question: when you play your original .flv recordings with VLC player, is the audio sync or async? |
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hi guys can please someone to help me with avidemux 2.6?
ok this is the problem....i record the show like i always do with rtmpdump and the file is saved like .flv but also with this version the audio is async so i must encode all the recordings with handbrake in mkv so the audio is perfect but the encoding take more time can someone please help me to avoid the encoding? i would like to use only avidemux and make videos perfecly sync like now but using only avidemux and in the original format flv thanks in advance  
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FFmpeg static build for Linux (64bit) - from Dirk Farin's github-repository
Includes the fantastic nlmeans-filter: [Versteckter Link - Registrierung notwendig] Just compare the screenshots on the website and you'll quickly realize how amazing this filter really is ffmpeg version N-56226-g1f7277a Copyright © 2000-2013 the FFmpeg developers built on Jun 18 2014 13:17:12 with gcc 4.8.2 (GCC) 20131212 (Red Hat 4.8.2-7) configuration: --prefix=/usr --arch=x86_64 --disable-debug --enable-static --disable-shared --enable-avisynth --enable-avresample --enable-fontconfig --enable-gnutls --enable-gpl --enable-libass --enable-libbluray --enable-libcaca --enable-libcdio --enable-libcelt --enable-libdc1394 --enable-libfaac --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libxvid --enable-libzvbi --enable-nonfree --enable-openal --enable-openssl --enable-pic --enable-version3 --enable-x11grab --enable-filters Download (MEGA): [Versteckter Link - Registrierung notwendig] |
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i recorded the show and these are the infos about the video
[Versteckter Link - Registrierung notwendig] audio is perfectly sync this file is flv saved in 41.236fps but when i make for example a complete etv show with some cutting and save the file with the same frames the video is too fast and async so i must see in the rtmp parameters and rtmp record in 20fps so in avidemux i save the video in 20fps and the videofile is right but the audio is async again and this is my damn problem because i tried many solution with avidemux but others format video do not work only mp4 work well with the video but again async audio or too back or too forward i tried also to save like the original flv file but avidemux say unsupported video only flv1 and vp6 video are supported thanks for the patience |
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@ All
Mediainfo does not know if file is varible, it only reads header info, which has been generated by recording app/Stream capture. Recording apps are dumb, they basically do a hex dump of input stream into media file format. A list of Media file types that can have variable fps. FLV MKV MOV MP4 WMB WM* RM ... ETC How do you verify the source file is not variable? if you don't check frame timing info. If you just take a source video with unknown fps and re-encode to fixed fps without putting the timing info back in, your encodes will have desync. A rough test is to demux source video to elementary streams and check duration of each. They wont match if variable. |
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thanks dackel and shirtfull for the help you gave me
one day my videos will be better than nowi'm using avidemux 2.5.6 32bit i want to try other versions but i don't know where to find them  my sistem is windows8 64bit |
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