Sample passing FFmpeg and base stream of MPEG-4 to VPL decoder?

[parksh]

Hi,

You answered my question last time.
Let me ask you another question.

https://community.intel.com/t5/Media-Intel-oneAPI-Video/Can-I-use-both-MFXInit-and-MFXLoad-in-one-application/m-p/1455754/emcs_t/S2h8ZW1haWx8dG9waWNfc3Vic2NyaXB0aW9ufExFNEg5Q0I4NjJUR1hUfDE0NTU3NTR8U1VCU0NSSVBUSU9OU3xoSw

Can I get a sample that delivers the basic stream of FFmpeg and MPEG-4 to the VPL decoder?

Even if it is not FFMPEG-4 processing, I would also like to get a sample that delivers the basic stream supported by VPL to VPL.

Thank you in advance.

[AlekhyaV_Intel]

Hi,

Thank you for posting in Intel Communities. We apologize to inform you that MPEG-4 is not supported by oneVPL at present. However, MPEG-2 is supported.

We have provided the list of supported codecs for oneVPL.

https://www.intel.com/content/www/us/en/docs/onevpl/upgrade-from-msdk/2021-3/supported-codecs.html

We have passed MPEG-2 video file to VPL decoder using sample_encode sample. Please find the steps below:

1. Converted a mp4 video to mpeg-2 video file

ffmpeg -i input.mp4 -c:v mpeg2video output-mpeg2.mp4

2. sample_decode.exe, along with other executables(encode, vpp, etc.), is available in /bin/ folder in VPL installed directory. You could try the below command to pass MPEG-2 video file to VPL decoder.

sample_decode.exe mpeg2 -i output-mpeg2.mp4 -o output.raw

3. A raw video file would be generated. Below command would be used to play that raw video.

ffplay -v info -f rawvideo -pixel_format nv12 -video_size 1920x1080 output.raw

If this resolved your issue, make sure to accept it as a solution. This helps others with similar issue. Thanks in advance!

Regards,

Alekhya

[parksh]

Thank you for your answer

ffmpeg to the vpl decoder, c++ code sample required
Do you have any samples of c++ code?

Thanks in advance!

[AlekhyaV_Intel]

Hi,

All the VPL samples are written in C++. Could you please elaborate the below sentence?

Ffmpeg to VPL decoder, code sample required.

We have samples to for decoding, encoding, transcoding and applying VPP filters. You could download Base Toolkit or oneVPL standalone library to get samples.(https://www.intel.com/content/www/us/en/developer/tools/oneapi/onevpl.html)

Regards,

Alekhya

[parksh]

use VPL for MPEG-4 decoding, you have to use a splitter(container->elementary) like FFmpeg on MPEG-4 and pass the elementary stream to VPL decoder.

-> You gave me this answer

I was wondering if there is any c++ code that passes the unsupported codec, the FFMPEG-4 codec, to the VPL using FFMPEG.

I'm sorry that it's not smmoth because I ased using translattion.

Thank you!

[AlekhyaV_Intel]

Hi,

We apologize that there's no sample for converting the unsupported codec and passing it to VPL decoder. But here's a workaround to convert mpeg-4 file to mpeg-2 video file using FFMPEG commands and pass it to VPL decoder.

Please find the below command which converts an MPEG-4 video file to MPEG-2 file:

ffmpeg -i input.mp4 -c:v mpeg2video -b:v 8000k -c:a mp2 -b:a 384k output.mpg

Here's what each option in the command does:

• -i input.mp4: Specifies the input file, which is the MPEG-4 file you want to convert.
• -c:v mpeg2video: Sets the video codec to MPEG-2.
• -b:v 8000k: Specifies the video bitrate to 8000 kilobits per second.
• -c:a mp2: Sets the audio codec to MPEG-1 Audio Layer II (MP2).
• -b:a 384k: Specifies the audio bitrate to 384 kilobits per second.
• output.mpg: Specifies the output file, which is the MPEG-2 file you want to create.

If this resolves your doubts/issues, make sure to accept this as a solution. This helps others with similar issue. Thanks in advance!

Regards,

Alekhya

[AlekhyaV_Intel]

Hi,

Has the solution provided helped? Could you please give us an update regarding this issue?

Regards,

Alekhya

[parksh]

Thanks again for your help.

[AlekhyaV_Intel]

Hi,

Thank you for getting back to us. As your issue is resolved, we are closing this thread now. If you need any further assistance, please post a new question as this thread will no longer be monitored by Intel.

Regards,

Alekhya