volvet

[lena.jpg.zip](https://github.com/google/guetzli/files/856793/lena.jpg.zip) This is a gray jpeg picture.

I have no idea what happened then, and I get success to build OpenCV. You'd better raise the issue to OpenCV forum.

the opus extractor will depacketize as the format | 4-bytes(length) | opus-payload | 4-bytes(length) | opus-payload, you can get the opus element stream by discarding the 4-byte length. Or you...

The extractor try to dump files in default directory. Seems it is unwritable, try to modify the code like this: ``` local fp = assert(io.open(os.getenv("HOME").."/dump.264", "wb")) ```

actually there are two exceptions here. 1. code bug. fixed at https://github.com/volvet/h264extractor/commit/5135e781e546f352048b54e9f54c1a7b8983adb5 2. I guess you need administrator right to dump file at wireshark given directories.

I guess that your case is: rtp payload is MPEG-TS, TS payload is h264. Unfortunately that is not supported. this h264 extractor only can support RFC 6184 defined packetize mode....

I have not maintained this repo for lack of time. It would be appreciated for PRs to support h265, av1, or other codecs.

Thanks for figure out. I'm not sure if it is a specific issue related to Wireshark for the code worked well before. Feel free to raise a PR to fix.