[SOLVED] FFMpeg not working with MediaSDK 2018Q2.1

[C__LP]

Hi,

I have compiled my own distro (using buildroot) that contains all packages for making libmfx working with my Intel Computestick STK2mv64CC.

I have followed the MediaSDK opensource guide (https://software.intel.com/en-us/articles/build-and-debug-open-source-media-stack) and the sample_multi_transcode with h264 is working fine now.

I have then downloaded and compiled version 3.4.2 of FFMpeg, with libmfx enabled. I am now trying to run a basic video transcoding using ffmpeg, without success.

This is the command I tried (using the bunny h264 sample video):

ffmpeg -y -init_hw_device qsv=qsv:MFX_IMPL_hw -hwaccel qsv -hwaccel_device qsv -i /trailer_1080p.mov -c:v h264_qsv -framerate 60 -acodec copy out.mp4

Relevant output lines of ffmpeg:

[h264_qsv @ 0x75d9d0] Using the VBR with lookahead (LA) ratecontrol method
[h264_qsv @ 0x75d9d0] Error initializing the encoder: unsupported (-3)

Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

I also tested with FFMPeg 3.2.4, 3.4.4.

Any clues on this? Is it possible to get a working ffmpeg call using ffmpeg and QSV?

Thank you for your help,

[Mark_L_Intel1]

Hi LP,

FFmpeg configuration with QSV is little bit confused, the good news is you have installed the Media SDK opensource successfully, so we might have to start from very basic:

1. Did you get a very basic case running, Like sample_decode?
2. If everything still not working, you can refer to following document: this document and this white paper about installation

Let me know if these help.

Mark

[C__LP]

Hi,

I finally successfully had a working version of FFMpeg. I used the Intel fork of FFMpeg https://github.com/Intel-FFmpeg-Plugin/Intel_FFmpeg_plugins/tree/intel_ffmpeg-3.4.1  (documentation is here: https://github.com/Intel-FFmpeg-Plugin/Intel_FFmpeg_plugins/wiki)

1. Yes sample_multiple_transcode is working well. I did not tested sample_decode though.

2. I have found and tried the example you provided, but in both documents you tell the user to download the "latest" version of FFMpeg. To my little experience with FFMpeg & QSV, versioni of the MSDK are tightly coupled with a version of FFMpeg.

Due to the legacy of documentation around the web regarding MediaSDK, it is hard for a new developers to jump into this technology. It would be great to add to your latest tutorial (https://software.intel.com/en-us/articles/build-and-debug-open-source-media-stack) how to build FFMpeg as well.

Thank you very much for your support.