No Video on MediaTek Device (Samsung Galaxy A15)?

[defrag-bambino]

Hi,
I just tried out the WifiLink by RunCam. Using the FPV4Win Windows App I receive the video just fine. However, using the same External Wifi Module (the one that comes with the WifiLink-G version), the PixelPilot app does not display any stream.
I did use the correct gs.key, generated by the WifiLink board. I also tried switching to h264. I am on the correct channel 173 with both devices. The PixelPilot App just says "Starting wfb-ng on channel 173 ..." - but never displays anything.

I am using a Samsung Galaxy A15 (not 5G version), which is a pretty new phone (2024) with the latest Android version. It has a Mediatek Helio G99 processor, which seems to be capable of both h264 and h265 - so it should be capable of handling this use-case just fine.

Any ideas what may be going on here? Is there any possibility to get a logfile from the PixelPilot App?

[Epictek]

This is a common issue with MediaTek SoCs as the third party encoder used the this app primarily supports snapdragon processors. Logs would be useful for debugging this issue

For obtaining logs, once #3 is merged there will be a share button. But for now the only way to obtain logs is using logcat on a PC

[defrag-bambino]

Could you upload an .apk build of #3 while we wait?

[Epictek]

Could you upload an .apk build of #3 while we wait?

Built by GitHub, not tested myself and not endorsed by openipc
https://github.com/Epictek/PixelPilot/releases/tag/latest

[defrag-bambino]

pixelpilot_log_20240920_202831.txt
Do you know what to look for in there?

[Epictek]

pixelpilot_log_20240920_202831.txt
Do you know what to look for in there?

Nothing jumps out straight away, another useful bit of information for debbuging would be the details of the HEVC decoder from https://play.google.com/store/apps/details?id=com.parseus.codecinfo

[defrag-bambino]

Ok:

c2.android.hevc.decoder

Hardware acceleration: false
Software-only: true
Low latency decoding: false
Codec provider: Android platform
Max supported instances: 32
Max resolution: 1920x1088
Max bitrate: 5 Mbps
Frame rate: 0 — 960 fps
Max frame rate per resolution:
144p: 960,0 fps
144p (YouTube): 853,3 fps
240p: 409,6 fps
240p (widescreen): 303,4 fps
360p: 182,0 fps
360p (widescreen): 136,5 fps
480p: 102,4 fps
480p (widescreen): 76,6 fps
576p: 75,9 fps
720p: 34,1 fps
1080p: 15,2 fps
Color profiles:
COLOR_FormatSurface (0x7F000789)
COLOR_FormatYUV420Flexible (0x7F420888)
COLOR_FormatYUV420PackedPlanar (0x14)
COLOR_FormatYUV420PackedSemiPlanar (0x27)
COLOR_FormatYUV420Planar (0x13)
COLOR_FormatYUV420SemiPlanar (0x15)
Adaptive playback: true (required: false)
Partial frames queuing: false
Secure playback decryption: false
Dynamic timestamp: false
Multiple access units: false
Tunneled playback: false
Partial access units per input buffer: false
Profile levels:
HEVCProfileMain (0x1): HEVCHighTierLevel52 (0x80000)
HEVCProfileMainStill (0x4): HEVCHighTierLevel52 (0x80000)

c2.mtk.hevc.decoder

Hardware acceleration: true
Software-only: false
Low latency decoding: false
Codec provider: Device vendor / OEM
Max supported instances: 12
Max resolution: 2560x2560
Max bitrate: 160 Mbps
Frame rate: 0 — 960 fps
Max frame rate per resolution:
144p: 960,0 fps
144p (YouTube): 960,0 fps
240p: 960,0 fps
240p (widescreen): 960,0 fps
360p: 960,0 fps
360p (widescreen): 960,0 fps
480p: 960,0 fps
480p (widescreen): 960,0 fps
576p: 960,0 fps
720p: 580,3 fps
1080p: 257,9 fps
Color profiles:
COLOR_FormatSurface (0x7F000789)
COLOR_FormatYUV420Flexible (0x7F420888)
COLOR_FormatYUV420PackedPlanar (0x14)
COLOR_FormatYUV420PackedSemiPlanar (0x27)
COLOR_FormatYUV420Planar (0x13)
COLOR_FormatYUV420SemiPlanar (0x15)
Adaptive playback: true (required: false)
Partial frames queuing: false
Secure playback decryption: false
Dynamic timestamp: false
Multiple access units: false
Tunneled playback: false
Partial access units per input buffer: false
Supported vendor parameters:
vendor.mtk.ext.vdec.force.output.cc.value
vendor.mtk.ext.vdec.hdr.feature-on
vendor.mtk.ext.vdec.heif.feature-on
vendor.mtk.ext.vdec.svp.feature-on
vendor.mtk.ext.vdec.vilte.feature-on
vendor.mtk.ext.vdec.vpp.disabled.value
vendor.mtk.ext.vdec.vpp.motion.intpl.feature-on
vendor.mtk.ext.vdec.vpp.motion.intpl.max-conversion-rate
vendor.mtk.ext.vdec.vpp.motion.intpl.pixel-format
vendor.mtk.ext.vdec.vpp.quality.tuner.feature-on
vendor.mtk.ext.vdec.vpp.quality.tuner.pixel-format
vendor.mtk.ext.vdec.vpp.resolution.scaler.feature-on
vendor.mtk.ext.vdec.vpp.resolution.scaler.max-frame-height
vendor.mtk.ext.vdec.vpp.resolution.scaler.max-frame-width
vendor.mtk.ext.vdec.vpp.resolution.scaler.pixel-format
vendor.mtk.intfimpl.thiz.value
vendor.mtk.output.buffer.alloc.config.usage
vendor.mtk.vdec.cpu.boost.mode.value
vendor.mtk.vdec.force.pixel.format.value
vendor.mtk.vdec.thumbnail.mode.value
Profile levels: HEVCProfileMain (0x1): HEVCHighTierLevel51 (0x20000)

c2.mtk.hevc.decoder.secure

Hardware acceleration: true
Software-only: false
Low latency decoding: false
Codec provider: Device vendor / OEM
Max supported instances: 1
Max resolution: 2560x2560
Max bitrate: 160 Mbps
Frame rate: 0 — 960 fps
Max frame rate per resolution:
144p: 960,0 fps
144p (YouTube): 960,0 fps
240p: 960,0 fps
240p (widescreen): 960,0 fps
360p: 960,0 fps
360p (widescreen): 960,0 fps
480p: 960,0 fps
480p (widescreen): 960,0 fps
576p: 960,0 fps
720p: 580,3 fps
1080p: 257,9 fps
Color profiles:
COLOR_FormatSurface (0x7F000789)
COLOR_FormatYUV420Flexible (0x7F420888)
COLOR_FormatYUV420PackedPlanar (0x14)
COLOR_FormatYUV420PackedSemiPlanar (0x27)
COLOR_FormatYUV420Planar (0x13)
COLOR_FormatYUV420SemiPlanar (0x15)
Adaptive playback: true (required: false)
Partial frames queuing: false
Secure playback decryption: true (required: true)
Dynamic timestamp: false
Multiple access units: false
Tunneled playback: false
Partial access units per input buffer: false
Supported vendor parameters:
vendor.mtk.ext.vdec.force.output.cc.value
vendor.mtk.ext.vdec.hdr.feature-on
vendor.mtk.ext.vdec.heif.feature-on
vendor.mtk.ext.vdec.svp.feature-on
vendor.mtk.ext.vdec.vilte.feature-on
vendor.mtk.ext.vdec.vpp.disabled.value
vendor.mtk.ext.vdec.vpp.motion.intpl.feature-on
vendor.mtk.ext.vdec.vpp.motion.intpl.max-conversion-rate
vendor.mtk.ext.vdec.vpp.motion.intpl.pixel-format
vendor.mtk.ext.vdec.vpp.quality.tuner.feature-on
vendor.mtk.ext.vdec.vpp.quality.tuner.pixel-format
vendor.mtk.ext.vdec.vpp.resolution.scaler.feature-on
vendor.mtk.ext.vdec.vpp.resolution.scaler.max-frame-height
vendor.mtk.ext.vdec.vpp.resolution.scaler.max-frame-width
vendor.mtk.ext.vdec.vpp.resolution.scaler.pixel-format
vendor.mtk.intfimpl.thiz.value
vendor.mtk.output.buffer.alloc.config.usage
vendor.mtk.vdec.cpu.boost.mode.value
vendor.mtk.vdec.force.pixel.format.value
vendor.mtk.vdec.thumbnail.mode.value
Profile levels: HEVCProfileMain (0x1): HEVCHighTierLevel51 (0x20000)

[defrag-bambino]

What is the "third party encoder" used? May I open an issue in their github to get this fixed?

[floppyhammer]

I also have some devices that don't show video. The problem seems to relate to the usb driver instead of the video decoder. The packet size gotten from adapter is always zero on those devices.

[floppyhammer]

libusb_bulk_transfer always returns LIBUSB_ERROR_TIMEOUT in RtlUsbAdapter::infinite_read, which means there's no packet ever processed to feed the decoder.

[493505110]

I have same problem,here is my log: pixelpilot_log_20260213_110825.txt,and my phone is Redmi Note 11 5G(MediaTek Dimensity 810)

[robertgach62-tech]

Same problem on Ulefone Armor X13 with a Mediatek MT6765

This issue is a year old, makes me wonder if there is any active development going on.

I'm regretting my Runcam Wifilink2 purchase, unusable on my two android platforms, only works on my PC desktop but thats no use in the field.

Runcam's Fly app has the same problem.

[robertgach62-tech]

From the logfile it seems like an issue with "devourer" libusb

[floppyhammer]

@robertgach62-tech I'd like to look into it. But currently I don't own an Android device that can reproduce the issue. Would you mind helping test it?

[robertgach62-tech]

@robertgach62-tech I'd like to look into it. But currently I don't own an Android device that can reproduce the issue. Would you mind helping test it?

Hi, yes I would love to help in any way I can. Let me know what I can do to help test.