ATSC 3 Recording: No PIDs specified when trying to open a transport stream

scottleslie

New member
First time I tried to open a file in VRD (836A). All the files play fine in HDHomeRun app on various devices (PCs, AppleTV, Shield, etc.). I am guessing that ATSC 4.0 is the culprit.
It would be great if I could open, edit and convert the audio to AC-3 (unless until Plex can play AC-4). For now stuck with watching all ATSC content on the HDHomeRun app.

Here's MediaInfo:
General
ID : 1 (0x1)
Complete name : \\Home-Server\Recorded TV\HDHomeRun\Movies\Just Like Heaven 20051201 [20220625-2300].mpg
Format : MPEG-TS
File size : 5.94 GiB
Duration : 2 h 9 min
Overall bit rate mode : Variable
Overall bit rate : 6 541 kb/s
Movie name : MAURY
Law rating : TV-14
FileExtension_Invalid : ts m2t m2s m4t m4s tmf ts tp trp ty

Video
ID : 49 (0x31)
Menu ID : 3 (0x3)
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L4@Main
Codec ID : 36
Duration : 2 h 9 min
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 59.940 (60000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

Audio #1
ID : 50 (0x32)
Menu ID : 3 (0x3)
Format : AC-4
Format/Info : Audio Coding 4
Commercial name : Dolby AC-4
Format version : Version 2
Codec ID : 6
Duration : 2 h 9 min
Sampling rate : 48.0 kHz
Frame rate : 25.000 FPS (1920 SPF)
Compression mode : Lossy
Delay relative to video : 23 ms
Language : English
Number of presentations : 1
NumberOfGroups : 1
Number of substreams : 1
Presentation #1 : 5.1 Main (English)
Presentation ID : 0
Dialogue normalization : -24.00
Language : English
Loudness : Yes
Integrated loudness (speech gated) : -22.7 LKFS
Integrated loudness (level gated) : -23.5 LKFS
Audio Loudness Standard : ATSC A/85
Realtime loudness corrected : Yes
Dialogue corrected : Yes
Dynamic Range Control : Yes
E-AC-3 DRC profile : Film standard
Home theater AVR : Film light
Flat panel TV : Film standard
Portable speakers : Film standard
Portable headphones : Film standard
Downmix : Yes
LoRo center mix gain : -3.0 dB
LoRo surround mix gain : -3.0 dB
LtRt center mix gain : -3.0 dB
LtRt surround mix gain : -3.0 dB
LFE mix gain : -3 dB
Group #s : 1
Group #1 : Main
Content classifier : Main
Language : English
Channel coded : Yes
Number of substreams : 1
Substream #s : 1
Substream #1 : 5.1
Channel mode : 5.1
Channel layout : L R C LFE Ls Rs
Preprocessing : Yes
Phase 90 filter info : Not applied
Surround attenuation known : Yes
LFE attenuation known : Yes
Dialogue enhancement : Yes
Enabled : Yes
Max gain : 9 dB
Channel configuration : L R

Audio #2
ID : 51 (0x33)
Menu ID : 3 (0x3)
Format : AC-4
Format/Info : Audio Coding 4
Commercial name : Dolby AC-4
Format version : Version 2
Codec ID : 6
Duration : 2 h 9 min
Sampling rate : 48.0 kHz
Frame rate : 25.000 FPS (1920 SPF)
Compression mode : Lossy
Delay relative to video : 40 ms
Language : Spanish
Number of presentations : 1
NumberOfGroups : 1
Number of substreams : 1
Presentation #1 : Stereo Main (Spanish)
Presentation ID : 0
Dialogue normalization : -24.00
Language : Spanish
Loudness : Yes
Integrated loudness (speech gated) : -23.3 LKFS
Integrated loudness (level gated) : -24.3 LKFS
Audio Loudness Standard : ATSC A/85
Realtime loudness corrected : Yes
Dialogue corrected : Yes
Dynamic Range Control : Yes
E-AC-3 DRC profile : Film standard
 

Dan203

Senior Developer
Staff member
Unfortunately we don’t support AC4 audio. It's a brand new format and it's quite a process for us to add a new audio/video format to VRD. There are also some licensing issues we have to contend with, especially with Dolby. DanR would know about that better than me, but for right now I'm not sure when, or if, we're going to be able to add AC4 support to the product.

From what I can find it looks like there are some experimental builds of ffmpeg v5 out there that can decode AC4. You could use that to convert the audio on your recordings to AC3 and then VideoReDo would be able to open them.
 
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