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Elephants Dream - Cover of the soundtrack
17 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Image
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Valkaama DVD Label
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Mis à jour : Février 2013
Langue : English
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Mis à jour : Février 2012
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Type : Video
Autres articles (109)
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MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
Multilang : améliorer l’interface pour les blocs multilingues
18 février 2011, parMultilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela. -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...)
Sur d’autres sites (9975)
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FFMPEG Cutting Commercials puts audio out of sync
11 septembre 2014, par JaBbAUbuntu 14.04.1 with the real ffmpeg loaded (same problem with the avconv version).
I’m trying to take files created in MythTV with a HDPVR, cut the commercials and put the video into an MP4 container for use with MythRoku.
the command
ffmpeg -i $file -acodec copy -vcodec copy -f mp4 file.mp4Works fine. Once I update the database, I can watch the file in MythRoku or Plex.
However, when I try to cut out the commercials, the audio gets out of sync by just over 1 second (audio delayed) whenever I cut past the 0 mark. Totem Video player and VLC both play the resulting video fine, but I can see a "hitch" at the beginning while they are syncing the audio, so I know the information on the audio sync is in the file somewhere. Mythroku and Plex both are out of sync when playing the file. The MythTV Frontend player actually does play it correctly, and I can hear the "hitch" as it syncs the audio.
After hours of reading posts and playing with settings, I’ve got it down to this :
If I say :
ffmpeg -i $file -acodec copy -vcodec copy -f mp4 -ss 0 -t <anything> out.mp4</anything>The file is fine, plays both locally and in MythRoku/Plex
But if I advance the start any amount - even 1 second - audio is out of sync
ffmpeg -i $file -acodec copy -vcodec copy -f mp4 -ss 1 -t <anything> out.mp4</anything>I’ve tried splitting the video (as mp4) and audio (as ac3) first, splitting them separately, and then putting them back together as the last step, but I get the same results.
The information is in the file - Totem, VLC and the Frontend all can figure it out. How can I get ffmpeg to figure out the sync and write the file so it’s correct ?
Original file :
mythtv@marvin:~$ mediainfo /var/lib/mythtv/recordings/2225_20140824001500.mpg
General
ID : 0 (0x0)
Complete name : /var/lib/mythtv/recordings/2225_20140824001500.mpg
Format : MPEG-TS
File size : 4.03 GiB
Duration : 1h 45mn
Overall bit rate mode : Variable
Overall bit rate : 5 491 Kbps
Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=4, N=32
Codec ID : 27
Duration : 1h 45mn
Bit rate mode : Variable
Bit rate : 4 831 Kbps
Maximum bit rate : 20.0 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 59.940 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.087
Stream size : 3.55 GiB (88%)
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Audio
ID : 4352 (0x1100)
Menu ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : 129
Duration : 1h 45mn
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -6ms
Stream size : 289 MiB (7%)File cut from 0 :
mythtv@marvin:~$ mediainfo 2225_20140824001500_1.mp4
General
Complete name : 2225_20140824001500_1.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 58.5 MiB
Duration : 1mn 45s
Overall bit rate mode : Variable
Overall bit rate : 4 676 Kbps
Writing application : Lavf54.63.104
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=4, N=32
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1mn 45s
Bit rate mode : Variable
Bit rate : 4 281 Kbps
Maximum bit rate : 20.0 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 59.940 fps
Minimum frame rate : 59.920 fps
Maximum frame rate : 59.960 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.077
Stream size : 53.6 MiB (92%)
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : ac-3
Duration : 1mn 45s
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 4.81 MiB (8%)File cut from 1 second with audio sync problem :
mythtv@marvin:~$ mediainfo 2225_20140824001500_2.mp4
General
Complete name : 2225_20140824001500_2.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 68.0 MiB
Duration : 2mn 0s
Overall bit rate mode : Variable
Overall bit rate : 4 750 Kbps
Writing application : Lavf54.63.104
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=4, N=32
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1mn 58s
Bit rate mode : Variable
Bit rate : 4 394 Kbps
Maximum bit rate : 20.0 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 59.940 fps
Minimum frame rate : 59.920 fps
Maximum frame rate : 59.960 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.080
Stream size : 62.3 MiB (92%)
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : ac-3
Duration : 2mn 0s
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 5.49 MiB (8%) -
Can ffmpeg transcode an audio track and add it as a second audio track at the same time, or if not, how to do it as separate commands ?
31 mai 2020, par wb6vpmA bit of history. I am using Plex as my media server, but for reasons unknown, it has issues transcoding the DTS-HD MA 7.1 audio to EAC3 stereo and keeps buffering (the server has plenty of horsepower on all fronts, CPU/RAM/drive space & speed, gigabit networks connections for all devices. The playback device (TCL Roku TV, with a 3rd party soundbar connected via HDMI ARC) doesn't support the built-in 7.1 audio, so I get silence if I play it back directly by putting the file on a USB stick.



Also, I am by no means a ffmpeg guru, I figured out what I do know by Google University and asking questions, so please be kind and forgive me if I ask follow-up questions that may seem n00b-ish, and please provide example commands (preferably in the context of my command below so that I can have a known point of reference to start with).



I have a movie with 4K (HEVC Main 10 HDR) video and DTS-HD MA 7.1 audio that I am looking to leave the video and audio untouched, but to add a 2nd audio track in either EAC3 or if necessary, just AC3 in stereo



So what I am looking for is as follows :



video.mkv



- 

- Existing->4k video file (no change)
- Existing->7.1 audio (no change)
- Convert and add->stereo audio as a 2nd audio track to the output.mkv file









Below is the command I've historically used with ffmpeg to convert and replace the audio file with the stereo audio, but since I'd prefer to leave the 7.1 audio in place, this doesn't work :

ffmpeg -i "D:\video.mkv" -c:v copy -c:a aac -b:a 128k "D:\output.mkv"


And if this cannot be done as a single command, please also let me know what steps I do need to take to be able to do it.



Thanks in advace,
Mike


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ffmpeg for loop into bash script
18 mars 2015, par gazI use a for loop on the mac command line to convert a bunch of avi’s to mp4’s
I would like to put this into a bash script so I can just run the script on any given directory.e.g shelf script name [directory
and let it do its thing.
Do I just open a text editor and add
#!/bin/bashthen my for loop and ffmpeg arguments
then end it all with
fi ?Then make it executable ? Is is that simple.
@Robert Rowntree
Many thanks for the link. This looks like it could be very useful to me. I am not familiar with the concatenate so I would have never found that information.
It appears that I can give ffmpeg a bunch of files at the command line or to read from a text file and ffmpeg will output them all into a single format, In my case MP4’s. Well at least this is what I think it does.
The "The inputs have to be of the same frame size, and a handful of other attributes have to match" worries me a bit, do i need to check the frame rate of every movie to ensure they all match ?
My ultimate goal would be to run a script on say, 30 mixed video files, avi, wmv, mkv, mpg etc and output the lot to mp4, but I think this is way too complicated for me.
I normally just repack mkv’s to mp4 and the quality and size are good and I’m pleased with the results and speed. However, I tried just repacking a the aforementioned avi’s and the quality was poor and pixelated. I searched around and finally found this example ;
ffmpeg -i input.avi -c:v libx264 -crf 19 -preset slow -c:a aac -strict experimental -b:a 192k -ac 2 out.mp4 (can this be improved ? Sped up ?)
Which produces great quality mp4 files from the avi’s I have got but does take a long time. Hence why I originally asked for help creating a script. Which I intended running on the folder of avi’s.
Be great to be able just to run a script on every non mp4 files and have great results every time :) But with different codecs and frame rates etc etc I suppose this will never be possible.
Any further help or input will be greatly received.
Thanks again.
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