Avidemux always shows a green screen.

[Betsy25]

Hi,

No matter what format I import as a source in Avidemux, v2.4 stable and v2.5 . I always end up seeing a green preview window, EVERY TIME.

If I import some .flv file, it says something about some unrecognized audio format (AAC) and crashes completely.:confused:

[LoRd_MuldeR]

A green screen usually indicates an unsupported video format...

[Betsy25]

Hi Lord_Mulder,

It means Avidemux does not support Youtube .flv or .mp4 files ?

[LoRd_MuldeR]

First of all, Avidemux supports the FLV container as well as the MP4 container. Also it supports the FLV1 video format as well as the H.264 video format.

Therefore files "downloaded" from Youtube should be supported, as these usually are FLV1 in a FLV container -or- H.264 in a MP4 container.

Anyway, if you can't get your file to work with the latest revision of Avidemux, then please post the MediaInfo report and/or provide a sample file...

[Betsy25]

Hi Lord_Mulder,

I only get a green screen, and an error "No audio decoder found for this file".

Here's MediaInfo text output :
General
Complete name : D:\Music Clips\Lily Allen - The Fear.flv
Format : Flash Video
File size : 19.0 MiB
Duration : 3mn 45s
Overall bit rate : 707 Kbps
totalduration : 225.040
totaldatarate : 706.608
bytelength : 19910416.000
canseekontime : Yes
sourcedata : B4A7D04C4

Video
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L3.0
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Muxing mode : Container profile=Unknown@3.0
Duration : 3mn 45s
Bit rate : 591 Kbps
Width : 640 pixels
Height : 360 pixels
Display aspect ratio : 16/9
Frame rate : 25.000 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.103
Stream size : 15.9 MiB (84%)

Audio
Format : AAC
Format/Info : Advanced Audio Codec
Format version : Version 4
Format profile : LC
Format settings, SBR : No
Duration : 3mn 45s
Bit rate : 109 Kbps
Channel(s) : 2 channels
Channel positions : L R
Sampling rate : 44.1 KHz
Resolution : 16 bits
Stream size : 2.92 MiB (15%)


File available here (18.9 MB) : http://www.2shared.com/file/5378240/ef3887bb/Lily_Allen_-_The_Fear.html

[LoRd_MuldeR]

It seems Avidemux isn't prepared for H.264 and AAC in a FLV container :o

What you can try: Demux your FLV file with FLV Extract (http://www.moitah.net/) and then re-mux the streams with MKV Toolnix (http://forum.doom9.org/showpost.php?p=933870&postcount=1) -or- YAMB (http://kurtnoise.free.fr/index.php?dir=Yamb/). The resulting MKV/MP4 file should open in Avidemux :)

Another option: Use Avisynth input via AVSProxy(GUI). FFVideoSource() does handle that FLV file...

[Betsy25]

Thanks a lot ! I'll report how it turns out.:)

[Gavino]

It seems Avidemux isn't prepared for H.264 and AAC in a FLV container :o
Any prospect of this being fixed soon? (still doesn't work in 2.5.1)

Demuxing with FLVExtract and remuxing with Yamb to mp4 works (Avidemux can then read the mp4), but direct support would clearly be more convenient.

[Gavino]

Any news on this, LoRd_MuldeR?