Autor Tema: Raspberry Pi 4 B kao Transcoder On The Fly (u realnom vremenu)  (Posjeta: 82 vremena)

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Čitao sam razne forume, svi su HEVC prekodiravali u drugi oblik naknadno, nakon što bi završilo snimanje. U TVHeadendu su to nazvali postprocessor command. Govorili su da transcoding ne može on the fly. Možda se ne može on the fly gledati, ali može se snimati.
Nitko to nije spomenuo ili neznam dobro engleski.

Ipak može, TVH prekodirava HEVC u MPEG2 on the fly za vrijeme snimanja.
Sada snimke mogu gledati na staroj opremi.







 


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Odg: Raspberry Pi 4 B kao Transcoder On The Fly (u realnom vremenu)
« Odgovori #1 u: Travanj 28, 2021, 09:21:26 »


Izbor codeca možda nije najbolji. Tvheadend troši 126% procesora.
Bez obzira uzmem li very fast ili slower.
Ne znam kako je to moguće, možda jednu jezgru broji kao 100%.

Uglavnom, nakon pola sata pukne prekodiravanje.

Log je katastrofa:


2021-04-28 08:09:12.454 [   INFO] transcode: 0003: 1:HEVC 1920x1080 ==> MPEG2VIDEO 1920x1080 (mpeg2video)
2021-04-28 08:09:12.456 [  ERROR] libav: SPS 0 does not exist.
2021-04-28 08:09:12.456 [  ERROR] libav: PPS id out of range: 1
2021-04-28 08:09:12.456 [WARNING] libav: Error parsing NAL unit #3.
2021-04-28 08:09:12.456 [  ERROR] libav: SPS 0 does not exist.
2021-04-28 08:09:12.456 [  ERROR] libav: PPS id out of range: 1
2021-04-28 08:09:12.456 [WARNING] libav: Error parsing NAL unit #3.
2021-04-28 08:09:12.456 [  ERROR] libav: SPS 0 does not exist.
2021-04-28 08:09:12.456 [  ERROR] libav: PPS id out of range: 1
2021-04-28 08:09:12.456 [WARNING] libav: Error parsing NAL unit #3.
2021-04-28 08:09:12.456 [  ERROR] libav: SPS 0 does not exist.
2021-04-28 08:09:12.456 [  ERROR] libav: PPS id out of range: 1
2021-04-28 08:09:12.456 [WARNING] libav: Error parsing NAL unit #3.
2021-04-28 08:09:12.456 [  ERROR] libav: SPS 0 does not exist.
2021-04-28 08:09:12.456 [  ERROR] libav: PPS id out of range: 1
2021-04-28 08:09:12.456 [WARNING] libav: Error parsing NAL unit #3.
2021-04-28 08:09:12.456 [  ERROR] libav: SPS 0 does not exist.
2021-04-28 08:09:12.456 [  ERROR] libav: PPS id out of range: 1
2021-04-28 08:09:12.456 [WARNING] libav: Error parsing NAL unit #3.
2021-04-28 08:09:12.456 [  ERROR] libav: SPS 0 does not exist.
2021-04-28 08:09:12.456 [  ERROR] libav: PPS id out of range: 1
2021-04-28 08:09:12.456 [WARNING] libav: Error parsing NAL unit #3.
2021-04-28 08:09:12.456 [  ERROR] libav: SPS 0 does not exist.
2021-04-28 08:09:12.456 [  ERROR] libav: PPS id out of range: 1
2021-04-28 08:09:12.456 [WARNING] libav: Error parsing NAL unit #3.
2021-04-28 08:09:12.456 [  ERROR] libav: SPS 0 does not exist.
2021-04-28 08:09:12.456 [  ERROR] libav: PPS id out of range: 1
2021-04-28 08:09:12.456 [WARNING] libav: Error parsing NAL unit #3.
2021-04-28 08:09:12.456 [  ERROR] libav: SPS 0 does not exist.
2021-04-28 08:09:12.456 [  ERROR] libav: PPS id out of range: 1
2021-04-28 08:09:12.456 [WARNING] libav: Error parsing NAL unit #3.
2021-04-28 08:09:12.456 [  ERROR] libav: SPS 0 does not exist.
2021-04-28 08:09:12.456 [  ERROR] libav: PPS id out of range: 1
2021-04-28 08:09:12.456 [WARNING] libav: Error parsing NAL unit #3.
2021-04-28 08:09:12.457 [  ERROR] libav: SPS 0 does not exist.
2021-04-28 08:09:12.457 [  ERROR] libav: PPS id out of range: 1
2021-04-28 08:09:12.457 [WARNING] libav: Error parsing NAL unit #3.
2021-04-28 08:09:12.457 [  ERROR] libav: SPS 0 does not exist.
2021-04-28 08:09:12.457 [  ERROR] libav: PPS id out of range: 1
2021-04-28 08:09:12.457 [WARNING] libav: Error parsing NAL unit #3.
2021-04-28 08:09:12.457 [  ERROR] libav: SPS 0 does not exist.
2021-04-28 08:09:12.457 [  ERROR] libav: PPS id out of range: 1
2021-04-28 08:09:12.457 [WARNING] libav: Error parsing NAL unit #3.
2021-04-28 08:09:13.070 [  ERROR] libav: warning, too many B-frames in a row
2021-04-28 08:09:13.207 [  ERROR] libav: warning, too many B-frames in a row
2021-04-28 08:09:13.328 [  ERROR] libav: warning, too many B-frames in a row
2021-04-28 08:09:13.453 [  ERROR] libav: warning, too many B-frames in a row
2021-04-28 08:09:13.581 [  ERROR] libav: warning, too many B-frames in a row
2021-04-28 08:09:13.707 [  ERROR] libav: warning, too many B-frames in a row
2021-04-28 08:09:13.968 [  ERROR] libav: warning, too many B-frames in a row
2021-04-28 08:09:14.250 [  ERROR] libav: warning, too many B-frames in a row