[mythtv-users] Lean Front

[Peter Bennett]

On 1/16/23 16:48, James wrote:
>
>> On 15 Jan 2023, at 10:33 pm, Peter Bennett <pb.mythtv at gmail.com> wrote:
>>
>> There is a failure in playback, likely caused by some sort of corruption in the file. Is it a recording or a video? Does it
>> happen with all recordings?
> Every other recording I have tried works perfectly
>
>> The message does not indicate an unsupported format. If you play an unsupported format video, you get a blank screen with audio only.
>>
>> Please open an issue in github and supply a sample video. I suggest you use google drive or a similar service to upload the video and add a link to the issue. I will take a look and see what the problem is
> I'm not sure there is an issue yet.
> The recording plays fine on my other backends.
> mythffprobe does no bitching
>
>   libavutil      56. 70.100 / 56. 70.100
>    libavcodec     58.134.100 / 58.134.100
>    libavformat    58. 76.100 / 58. 76.100
>    libavdevice    58. 13.100 / 58. 13.100
>    libavfilter     7.110.100 /  7.110.100
>    libswscale      5.  9.100 /  5.  9.100
>    libswresample   3.  9.100 /  3.  9.100
>    libpostproc    55.  9.100 / 55.  9.100
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/store/Movies/Myth-F/The Father.mp4':
>    Metadata:
>      major_brand     : isom
>      minor_version   : 512
>      compatible_brands: isomiso2avc1mp41
>      encoder         : Lavf58.76.100
>    Duration: 01:27:57.65, start: 0.000000, bitrate: 2551 kb/s
>    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 2287 kb/s, 49.96 fps, 50 tbr, 90k tbn, 50 tbc (default)
>      Metadata:
>        handler_name    : VideoHandler
>        vendor_id       : [0][0][0][0]
>    Stream #0:1(eng): Audio: mp3 (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 255 kb/s (default)
>      Metadata:
>        handler_name    : SoundHandler
>        vendor_id       : [0][0][0][0]
>
>> . You can also try the suggestions in the documentation to reformat the file using ffmpeg or mkvmerge. See the section "Problems" in https://github.com/bennettpeter/android-MythTV-Leanfront#readme. The reformat is very quick and does not re-encode the video.
> I recovered the recording (undelete)
>
> mkvmerge won't work with mk4 files
> the ffmpeg works, complains, and wont play-back
mkvmerge will accept mp4 files, ts files, almost any video format as 
input. It produces mkv output, and you can use the mkv file as a video 
or recording in mythtv.
>
> [h264 @ 0x25609c0] mmco: unref short failure
>      Last message repeated 1 times
> [h264 @ 0x25609c0] number of reference frames (0+5) exceeds max (4; probably corrupt input), discarding one
> [h264 @ 0x25609c0] mmco: unref short failure
>      Last message repeated 1 times
> Input #0, mpegts, from '/store/Movies/outputfile.mp4':
>    Duration: 01:27:57.65, start: 1.400000, bitrate: 2686 kb/s
>    Stream #0:0[0x100]: Video: h264 (High), yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 50 tbr, 90k tbn, 50 tbc
>    Stream #0:1[0x101](eng): Audio: mp2, 48000 Hz, stereo, fltp, 256 kb/s
The ffmeg log shows that it is a ts file that has been renamed to mp4. 
This is ok, most players including mythfrontend and leanfront will 
detect the correct file type and play it.
> Thanks for the help. I'll see if I can resolve the issue which is *certain* to be some funny in their encoding
> For Example
>
> This recording is 720 but my transcode fails, I have to transcode with my h264cut.sh
> Then 100s or 1000s of cuts work perfectly in mythfrontend and in VLC.
> A few, including this one, work perfectly in mythfrontend but have 70ish mS lip sync in vlc.
>
> Clearly I have some learning to do
>
> James
>
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