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Re: Stuff to print on T-Shirts

With Love(tm)
by peter_b
Thu Aug 01, 2019 3:09 pm
 
Forum: Brainstorming & Smalltalk
Topic: Stuff to print on T-Shirts
Replies: 30
Views: 30295

UPDATE: use ffmpeg "-hash"

UPDATE: After asking for input on ffmpeg-user mailing list , I was told that ffmpeg already has a built-in content hash muxer. I only knew about frame-hashing until then :shock: It's actually pretty cool! Quote Moritz Barsnick: $ ffmpeg -i input -map 0:a -c:a copy -f hash - or $ ffmpeg -i input -ma...
by peter_b
Sat Jul 27, 2019 12:17 am
 
Forum: Knowledge Base
Topic: Video per-frame integrity check - verifying losslessness
Replies: 5
Views: 7980

FFV1 & mencoder: "chroma shift parameters 7 0 are invalid"

[PROBLEM] Trying to decode a 10 bpc (bits-per-component) FFV1 file with mencoder (pix_fmt = yuv422p10le). (On Debian 9, with mencoder installed from default repositories - version: 2:1.3.0-6. Files were created with Virtualdub2 build 43385) I get an empty output video file and the following error m...
by peter_b
Tue Jul 23, 2019 3:30 pm
 
Forum: Knowledge Base
Topic: FFV1 & mencoder: "chroma shift parameters 7 0 are invalid"
Replies: 0
Views: 1234

Optional: some Kantlpsum markdown examples.

Some optional Markdown input examples:

Code: Select all
# Only certain paragraphs

## First paragraph only:

\kant[1]

## Second to fourth:

\kant[2-4]


# Same. Without paragraphs:

\kant*[2-4]
by peter_b
Thu Jul 18, 2019 4:30 am
 
Forum: HowTo's
Topic: Kantlipsum on Ubuntu
Replies: 1
Views: 1123

Kantlipsum on Ubuntu

In the past, I've used an online Python generator for creating random text in Immanuel Kant style , every now and then. Here's how to include this so called "Kant Lipsum" text in e.g. Markdown - generated by [url]Pandoc[/url] when rendering to an output format! :shock: 8) First, here's the...
by peter_b
Thu Jul 18, 2019 4:03 am
 
Forum: HowTo's
Topic: Kantlipsum on Ubuntu
Replies: 1
Views: 1123

HowTo generate single hashcode for A/V content

This script does the following all in a single FFmpeg command execution: ⋅  Rewrap container ⋅  Generate hashcode of raw uncompressed video content ⋅  Generate hashcode of raw uncompressed audio content Whatfor? Same as what "frameMD5" or "frameCRC" ...
by peter_b
Wed Jun 26, 2019 4:39 am
 
Forum: HowTo's
Topic: HowTo generate single hashcode for A/V content
Replies: 0
Views: 1215

Option 2 for audio hashing

Keenan J. Troll also suggested some other interesting method for hashing audio - as one. Without grouping samples together. Just one hash for the whole audio block. His original command included video container structure data in the output. I've removed this by setting the output format to raw sampl...
by peter_b
Wed Jun 19, 2019 4:34 pm
 
Forum: Knowledge Base
Topic: Video per-frame integrity check - verifying losslessness
Replies: 5
Views: 7980

Generate A+V fixity framemd5 in one command/step

Based on some inspiration and input from Keenan J. Troll, here's a recipe that does 4 things in one: ⋅  Rewrap (without transcoding) to MKV ⋅  Adjust (tech-)metadata here too. This is optional, but very handy. The example here shows setting interlacing flags. ⋅  Generat...
by peter_b
Wed Jun 19, 2019 4:26 pm
 
Forum: Knowledge Base
Topic: Video per-frame integrity check - verifying losslessness
Replies: 5
Views: 7980

FFmpeg: Filtering and streamcopy cannot be used together.

[PROBLEM] I was trying to generate framemd5 for video and audio in one step: $ ffmpeg -i bars.mov -map 0 -c copy -flags +ildct+ilme -field_order bb rewrap.mkv \ -an -f framemd5 bars.video.framemd5 \ -vn -c:a pcm_s24le -filter_complex "asetnsamples=n=48000" -f framemd5 bars.audio.framemd5 ...
by peter_b
Wed Jun 19, 2019 4:23 pm
 
Forum: Knowledge Base
Topic: FFmpeg: Filtering and streamcopy cannot be used together.
Replies: 0
Views: 1564

HowTo: RPi as WakeOnLAN server

This is actually based on the steps described on instructables.com: Raspberry Pi As Wake on LAN Server . 1) Install "etherwake" package: $ apt install etherwake In my network, I've got all ethernet MAC IDs configured in my ISC DHCP configuration (Raspbian/Debian), so I'm using that "d...
by peter_b
Fri Apr 12, 2019 7:48 am
 
Forum: HowTo's
Topic: HowTo: RPi as WakeOnLAN server
Replies: 0
Views: 1168

Additional error messages

Everything here is optional! In this posting, I'm just collecting issues I encountered during trying to fix this. I hope it helps others to find this thread and hopefully the above mentioned solution works for them too :D # Trying to load the module manually, after install with ubuntu's proprietary...
by peter_b
Mon Mar 18, 2019 6:37 pm
 
Forum: Knowledge Base
Topic: Xubuntu nvidia: 800x600px after package update
Replies: 1
Views: 2872

Xubuntu nvidia: 800x600px after package update

[PROBLEM] After amost recent update of X11 and kernel packages on a Xubuntu 16.04.6 system, the graphics card setup regressed: From proper working Dualscreen (FullHD + 1280x1024 resolution) to single monitor at 800x600 pixels :shock: :? I know that a proprietary Nvidia driver was used before, but I...
by peter_b
Mon Mar 18, 2019 5:10 pm
 
Forum: Knowledge Base
Topic: Xubuntu nvidia: 800x600px after package update
Replies: 1
Views: 2872

"decoder profile not supported: 8"

Although audio + video works fine now in VLC, there's a warning/error message in the console in the background:
vdpau_avcodec generic error: decoder profile not supported: 8
by peter_b
Mon Mar 18, 2019 4:59 pm
 
Forum: Knowledge Base
Topic: VLC & Nouveau driver: Black screen with sound.
Replies: 1
Views: 2835

VLC & Nouveau driver: Black screen with sound.

[PROBLEM] After switching to Nouveau drivers for an Nvidia graphics card (see below) everything seems to be working fine (including Dualscreen+offset, etc) - but VLC doesn't play any videos: Black screen. No error message (except in the console. See below). But sound is playing. Here's info about t...
by peter_b
Mon Mar 18, 2019 4:38 pm
 
Forum: Knowledge Base
Topic: VLC & Nouveau driver: Black screen with sound.
Replies: 1
Views: 2835

HowTo: Directory listing with ISO8601 date/time

This HowTo explains quickly how to get the full date/time information for a directory listing in the shell. By default, "ls" on GNU/Linux (e.g. Debian, Ubuntu, etc) only gives a short view of date and time for files and folders: ls-dirlist_normal.png When a timestamp is further in the past...
by peter_b
Tue Mar 05, 2019 9:20 pm
 
Forum: HowTo's
Topic: HowTo: Directory listing with ISO8601 date/time
Replies: 0
Views: 2294
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