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Convert Video with alpha channel

Hi Team,


I trying to convert a video to a video with alpha channel but i keep receiving an error about no such file  as below when i tried to run the convert.sh. I placed my original video at my desktop. I even tried place the video on the same folder of the convert.sh and i still get the same error.


The SDK i used was downloaded from this url:

https://cdn.wikitude.com/sdk/7_1_0/WikitudeSDK_NativeAPI_iOS_7-1-0_2017_09_20_17_47_53.zip



My Command Line:

 sh convert.sh ~/Desktop/T-Rex010.mp4 ~/Desktop/abc.mp4 


The Output i get after run the command line above

ffmpeg version 2.0.1 Copyright (c) 2000-2013 the FFmpeg developers

 built on Aug 15 2013 10:56:46 with llvm-gcc 4.2.1 (LLVM build 2336.11.00)

 configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --arch=x86_64 --enable-runtime-cpudetect

  libavutil      52. 38.100 / 52. 38.100

  libavcodec     55. 18.102 / 55. 18.102

  libavformat    55. 12.100 / 55. 12.100

  libavdevice    55.  3.100 / 55.  3.100

  libavfilter     3. 79.101 /  3. 79.101

  libswscale      2.  3.100 /  2.  3.100

  libswresample   0. 17.102 /  0. 17.102

  libpostproc    52.  3.100 / 52.  3.100

: No such file or directory


Any idea about how to solve this issue?


Hi Daniel,


Thanks you for your help and the script you given is working for me.

Hi Alex,

Transparent videos are not currently supported on Native out of the box, but it should be possible to implement them yourself. You will need to process the frames in a custom shader in order to grab the alpha channel from the bottom part of texture. Please see the documentation for more information.

Thanks
Eva

 

Hi Eva,


not really understand what you means "Transparent videos are not currently supported on Native out of the box".


Actually, the video i tried to convert via using convert.sh was brought from a template market and it should be already in alpha channel.


Here is the url for the orignal video brought from the template market.

https://www.dropbox.com/s/jrq7mkg8yf9i4zp/T-Rex010.mov?dl=0



I did test run the convert.sh with the original video but still receiving the same error. Therefore i tried convert it to the H246.mp4 and the result still the same.

The problem is why i keep receive no such file or directory whenever i tried run the convert.sh


Here is the Command line i used

sh convert.sh ~/Desktop/T-Rex010.mov ~/Desktop/test.mp4


The output result:

ffmpeg version 2.0.1 Copyright (c) 2000-2013 the FFmpeg developers

 built on Aug 15 2013 10:56:46 with llvm-gcc 4.2.1 (LLVM build 2336.11.00)

 configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --arch=x86_64 --enable-runtime-cpudetect

  libavutil      52. 38.100 / 52. 38.100

  libavcodec     55. 18.102 / 55. 18.102

  libavformat    55. 12.100 / 55. 12.100

  libavdevice    55.  3.100 / 55.  3.100

  libavfilter     3. 79.101 /  3. 79.101

  libswscale      2.  3.100 /  2.  3.100

  libswresample   0. 17.102 /  0. 17.102

  libpostproc    52.  3.100 / 52.  3.100

: No such file or directory


DONE **ERROR** 0





Hi Alex,

I am afraid you are referring to an issue that has is not related with our products. We do not support the feature to convert videos, but the technology on how to make them appear as augmentations. So unless you can post an error that is Wikitude SDK related I am afraid that we cannot help you.

Thanks
Eva

 

Hi Eva,


I referring to the execution of the convert.sh as show as the screenshot below which is below the overlay videos document from this url: http://www.wikitude.com/external/doc/documentation/latest/studio/workingwithvideos.html?&_ga=2.248505799.1920788039.1515552044-1010125088.1510027232#overlayalpha



image



So you means the file convert.sh which is inside the SDK folder/tools/video/mac_osx is not belong and part of to the Wikitude SDK?

image


Hi Alex,

Let's start from the first step. When you execute the command cd <SDK>/tools/video/MacOSX, do you make sure that you put the exact path of where the convert.sh file is? Because, based on your screen shot the path should be something like cd .../Tools/Video/mac_osx.

Thanks
Eva

 

Hi Eva,


I placed the whole SDK folder and the video file at the desktop as the screenshot below.

image


Then, i open the terminal and change the path to the "wikitude_sdk/Tools/Video/mac_osx" and i can get the convert.sh and ffmpeg file when i call ls in the terminal. After that, i tried call the command

 'sh convert.sh ~/Desktop/T-Rex010.mov ~/Desktop/T-Rex-output.mp4'  and i get an error 'No such file or directory' as the screenshot below.


image


Is there anything goes wrong with all the steps above i show?

Hi Eva,


Here is another test i did. i placed the video file in the same folder of the convert.sh and tried to execute the command line but the result still the same.

image


Hi Alex,



looking at the convert.sh script, I believe the proper way to call it is actually:


sh convert.sh -i <input_video> -o <output_video>


So I believe our documentation is actually wrong on this. Would you mind trying with the command I posted and letting me know whether it works or not?



- Daniel

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