vo-aacenc | VisualOn AAC encoder from Android | Speech library
kandi X-RAY | vo-aacenc Summary
kandi X-RAY | vo-aacenc Summary
VisualOn AAC encoder library. This library contains an encoder implementation of the Advanced Audio Coding (AAC) audio codec. The library is based on a codec implementation by VisualOn as part of the Stagefright framework from the Google Android project.
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QUESTION
When I try to convert a bunch of PNGs with alpha in them, the conversion works but there's this strange behavior where the pixels from previous frames do not get cleared and show up in the next frame where the background should just be fully transparent. It looks exactly the same as if you're drawing frames on top of each other without clearing the whole canvas in-between.
I'm speculating on what happens but I think given a frame N with a pixel RGBA (1, 0, 0, 1) and a frame N+1 with a pixel (0, 0, 0, 0), ffmped produces the second frame as (1, 0, 0, 1) when I want (0, 0, 0, 0).
Any way to force ffmpeg to try and clear all the pixels from the last frame before encoding the new frame?
Command I use:
...ANSWER
Answered 2021-Aug-06 at 19:30I just needed to upgrade to ffmpeg 4.4 and it works fine now.
QUESTION
Using a fairly simple installation of ImageResizer, integrated with our application. We're evaluating it, and so have not applied a license yet. Images are resizing as expected (with the red dot for no license), but we're trying to pull frames from videos using the FFmpeg plugin and having problems.
With a request like myvideo.mp4?ffmpeg.seconds=1
or myvideo.mp4?ffmpeg.percent=50
, the browser shows The image ... cannot be displayed because it contains errors
, and application log shows:
ANSWER
Answered 2021-Mar-13 at 10:25Hoo boy, don't i feel sheepish.. it's a good thing i like humility. :-|
Turns out the comment down at the bottom of the Ffmpeg documentation page is really important: "Make sure you use , or ffmpeg will not be able to participate in the request.".
Seems like that should probably be up in the Installation section.
QUESTION
I am using ffmpeg-python to combine video and audio in my program but for one video file I constantly get this error:
...ANSWER
Answered 2021-Jan-26 at 15:18It looks like your ffmpeg
was not built with AV1 support. Neither --enable-libdav1d
nor --enable-libaom
appear in the configuration. It's also really old (a 2.0 dev build from 2013).
You can confirm with the ffmpeg -codecs
command, and look for a line like this
DEV.L. av1 Alliance for Open Media AV1 (decoders: libdav1d libaom-av1 )
If it's missing, or there's no D
, then it will not work.
Note that you have a shared build (--disable-static --enable-shared
), so you'll also need to have the libraries installed separately, even if they were enabled.
Consider increasing the value for the 'analyzeduration' and 'probesize' options
This won't work in this case. It's already found the parameters – (av01 / 0x31307661), 2560x1440, 5427 kb/s
– but doesn't know what to do with them.
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