gz-sim: Video Recorder

[azeey-test]

Configuration

• os: Windows

Links

• Live
• Source

Process

Step 1 - Instructions work

Step 2 - Images (if there are any) match the result

[peci1]

I'll test this over the weekend on a real Win 10 laptop.

[peci1]

Everything works as it should (except OGV recording - ffmpeg says it doesn't have vp8 encoder).

[azeey]

It seems like the conda version of ffmpeg doesn't enable vp8. It explicitly does --enable-libvpx for MacOS and Linux (see https://github.com/conda-forge/ffmpeg-feedstock/blob/main/recipe/build.sh). I think a note in the tutorial would be sufficient.

[peci1]

I've added the note here: gazebosim/gz-sim#2634 .

[peci1]

The behavior when OGV is selected on Windows is suboptimal, though. In the best case, the format should be greyed out or not offered at all.

Currently, I can select the format, and then the GUI console gets spammed:

(2024-09-20 01:36:14.413) [error] [VideoEncoder.cc:416] [GUI] Codec for[vp8] not found. Video encoding is not started.
(2024-09-20 01:36:14.429) [info] [VideoRecorder.cc:224] [GUI] Recording video using bitrate: 2070000
(2024-09-20 01:36:14.430) [error] [VideoEncoder.cc:416] [GUI] Codec for[vp8] not found. Video encoding is not started.
(2024-09-20 01:36:14.445) [info] [VideoRecorder.cc:224] [GUI] Recording video using bitrate: 2070000
(2024-09-20 01:36:14.446) [error] [VideoEncoder.cc:416] [GUI] Codec for[vp8] not found. Video encoding is not started.
(2024-09-20 01:36:14.461) [info] [VideoRecorder.cc:224] [GUI] Recording video using bitrate: 2070000
(2024-09-20 01:36:14.462) [error] [VideoEncoder.cc:416] [GUI] Codec for[vp8] not found. Video encoding is not started.
(2024-09-20 01:36:14.478) [info] [VideoRecorder.cc:224] [GUI] Recording video using bitrate: 2070000
(2024-09-20 01:36:14.479) [error] [VideoEncoder.cc:416] [GUI] Codec for[vp8] not found. Video encoding is not started.
(2024-09-20 01:36:14.494) [info] [VideoRecorder.cc:224] [GUI] Recording video using bitrate: 2070000
(2024-09-20 01:36:14.495) [error] [VideoEncoder.cc:416] [GUI] Codec for[vp8] not found. Video encoding is not started.
(2024-09-20 01:36:14.511) [info] [VideoRecorder.cc:224] [GUI] Recording video using bitrate: 2070000
(2024-09-20 01:36:14.512) [error] [VideoEncoder.cc:416] [GUI] Codec for[vp8] not found. Video encoding is not started.
(2024-09-20 01:36:14.528) [info] [VideoRecorder.cc:224] [GUI] Recording video using bitrate: 2070000
(2024-09-20 01:36:14.529) [error] [VideoEncoder.cc:416] [GUI] Codec for[vp8] not found. Video encoding is not started.
(2024-09-20 01:36:14.546) [info] [VideoRecorder.cc:224] [GUI] Recording video using bitrate: 2070000
(2024-09-20 01:36:14.547) [error] [VideoEncoder.cc:416] [GUI] Codec for[vp8] not found. Video encoding is not started.

[traversaro]

It seems like the conda version of ffmpeg doesn't enable vp8. It explicitly does --enable-libvpx for MacOS and Linux (see https://github.com/conda-forge/ffmpeg-feedstock/blob/main/recipe/build.sh). I think a note in the tutorial would be sufficient.

Just a cross-link to the issue(s) tracking libvpx (and hence vp8) support for Windows:

• Feature parity for windows builds conda-forge/ffmpeg-feedstock#149
• Build for windows conda-forge/libvpx-feedstock#7