Tvheadend

I opened a bug for this

https://tvheadend.org/issues/4597

I didn't hear back yet with any workarounds.

Anyone have any possible mitigation so I can get this working again? i haven't heard anything back on the issue i filed.

Unfortunately it may take some time for your issue to be looked into (we need more devs!), it's there so it will be seen eventually.

Mark,

Thanks - and I appreciate all the hard work that the whole team put in to this project. I had figured the transcoding was a fairly heavily utilized feature for TVH so i thought a lot of people would have hit this bug.

M

I don't use transcoding, but I ran a test and it appears to work for me:

transcode: 0001: 01:MPEG2VIDEO: ==> Using profile webtv-h264                                                                                                                                    
transcode: 0001: 02:MPEG2AUDIO: ==> Using profile webtv-aac                                                                                                                                     
Detected framedrop in audio (17280 != 19440)                                                                                                                                                    
libav: AVCodecContext: using cpu capabilities: MMX2 SSE2Fast LZCNT                                                                                                                              
libav: AVCodecContext: profile High, level 2.1                                                                                                                                                  
...                                                                                                                                                                                             
dvr:  #  type              lang  resolution  aspect ratio  sample rate  channels                                                                                                                
dvr:  1  H264                    544x576     16:9
dvr:  2  AAC               eng                             48000        2

The only things I can think of are maybe your libraries changed, perhaps your broadcast has changed (seems unlikely). If you use "pass" profile then does Tvheadend correctly detect the video/audio (lines similar to the above in my log)? I know for many of my recordings it appears it can't detect number of audio channels and logs a question mark instead of the number two and then creates a file with no audio at all.

It appears from your log snippet that you it detects AAC audio and h264, so I assume you're trying to lower bitrate/resolution?

In the past, I have seen people say they record using pass and then transcode afterwards, but since it used to work for you perhaps there is something obvious that has changed.

Hi Em,

PASS works fine - that is what i'm using currently and I have no issues other than high bandwidth usage. I am using the transcode function to reduce the bandwidth requirement.

It used to work perfectly until the stream profile configuration settings were changed in the web GUI about a month ago in the nightly snaps. Right after that everything broke. I'm guessing its the h264 in that causes the problem - in your example your feeding MPEG2 in.

M

I tried with h264 and it works.

transcode: 0002: 01:H264: ==> Using profile webtv-h264                                                                                                                                          
transcode: 0002: 02:MPEG2AUDIO: ==> Using profile webtv-aac                                                                                                                                     
transcode: 0002: 03:AC3: ==> Filtered out                                                                                                                                                       
libav: AVCodecContext: mmco: unref short failure                                                                                                                                                
libav: AVCodecContext: using cpu capabilities: MMX2 SSE2Fast LZCNT                                                                                                                              
libav: AVCodecContext: profile High, level 3.0                                                                                                                                                  
libav: AVCodecContext: mmco: unref short failure                                                                                                                                                
...                                                                                                                                                                                             
dvr:  #  type              lang  resolution  aspect ratio  sample rate  channels                                                                                                                
dvr:  1  H264                    1920x1080   16:9                                                                                                                                               
dvr:  2  AAC               eng                             48000        2         

Have you tried the default profiles? In my case it was webtv-h264.

Can you build the code yourself? If so, "man git-bisect" will show you how to track down where it broke for you. You'd basically pick a commit from two months ago as the "good" and then let "git bisect" find the bad one for you, but it might be tricky if you're not used to compiling yourself.

Can you install an earlier nightly snap to see when specifically it broke?

Have you tried other codecs for test purposes such as vp8? I know you don't want your proper recordings in that format, but just to try.

Presumably the watch live tv on the web gui doesn't work either for you?

Hi Em,

Using the default profile I get the same. My output looks similar to yours. I have tried through the webgui and get the same error. For this test in the webgui i'm choosing "webtv-h264-aac-matroska"

Oct 27 09:15:25 us-tvh tvheadend¹⁴⁰⁸⁰: transcode: 0033: 01:H264: > Using profile webtv-h264
Oct 27 09:15:25 us-tvh tvheadend[14080]: transcode: 0033: 02:AAC-LATM: > Using profile webtv-aac
Oct 27 09:15:27 us-tvh tvheadend¹⁴⁰⁸⁰: libav: AVCodecContext: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
Oct 27 09:15:27 us-tvh tvheadend¹⁴⁰⁸⁰: libav: AVCodecContext: profile High, level 3.0
Oct 27 09:15:27 us-tvh tvheadend¹⁴⁰⁸⁰: libav: AVFilter: Invalid parameters provided.
Oct 27 09:15:27 us-tvh tvheadend¹⁴⁰⁸⁰: transcode: 0033: 01:H264: [h264 => libx264]: filters: failed to create 'in' filter

I have also tried vp8 and the others and I get the same error everytime. I haven't done much compiling in the last few years so that would probably be hard for me to do. I know it broke when they moved all the stream settings around in the webgui. Hopefully the DEVs can figure it out soon

Any more thoughts?

G C wrote:

Hello,

I'm running 4.3-472~g8fc3520 and I noticed that the stream profiles/codec profiles pages have been re-worked in the last few nightlys and now I am unable to transcode a stream. I get this in the log

Sep 14 08:36:17 us-tvh tvheadend¹⁹⁰⁶¹: transcode: 0009: 01:H264: > Using profile low
Sep 14 08:36:17 us-tvh tvheadend[19061]: transcode: 0009: 02:AAC-LATM: > Copy
Sep 14 08:36:17 us-tvh tvheadend¹⁹⁰⁶¹: libav: AVCodecContext: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
Sep 14 08:36:17 us-tvh tvheadend¹⁹⁰⁶¹: libav: AVCodecContext: profile Main, level 3.0
Sep 14 08:36:17 us-tvh tvheadend¹⁹⁰⁶¹: libav: AVFilter: Invalid parameters provided.
Sep 14 08:36:17 us-tvh tvheadend¹⁹⁰⁶¹: transcode: 0009: 01:H264: [h264 => libx264]: filters: failed to create 'in' filter

I've tried tweaking all of the settings in the profiles but I cannot find a video profile that avoids this error. Any ideas what might be causing this?

https://www.youtube.com/watch?v=SKCpPsTJTiA&t=65s

I'm not using any GPU for the encoding. Is there something particular in the video i'm looking for?

Em,

What version of FFMPEG do you have on your machine?

I have

ffmpeg version 2.8.11-0ubuntu0.16.04.1

M

This started working around a month ago. I updated last night to 4.3-982~gbe4a32a and the problem is back again!

it seems to depend on the input stream. certain feeds coming in (IPTV) seem to fail while others work fine (even from the same provider). How would I go about debugging this further?

Same here

Uploading a stream example

It works ok via pass, not in transcoding.

The issue here is probably the same as in #3105: AAC-LATM doesn't work with transcoding right now. I am trying to transcode AAC-LATM to AAC aswell but currently no luck aswell.