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jocover / jetson-ffmpeg

ffmpeg support on jetson nano
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Encoder can not return packets with pts/dts in range other than 0..999999 #41

Open teplofizik opened 4 years ago

teplofizik commented 4 years ago

PTS/DTS return as PTS % 1000000

avcodec_send_frame(); <= pts: 1000123 avcodec_receive_packet() => pts: 123

Error: [flv @ 0x55ceac0a60] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 999999 >= 32

Jetson Xavier

teplofizik commented 4 years ago

nvmpi_enc.cpp: 415 v4l2_buf.timestamp.tv_usec = frame->timestamp; to 415 v4l2_buf.timestamp.tv_usec = frame->timestamp % 1000000; 416 v4l2_buf.timestamp.tv_sec = frame->timestamp / 1000000;

88 ctx->timestamp[ctx->buf_index]=v4l2_buf->timestamp.tv_usec; to 88 ctx->timestamp[ctx->buf_index] = (v4l2_buf->timestamp.tv_usec % 1000000) + (v4l2_buf->timestamp.tv_sec * 1000000UL);

teplofizik commented 4 years ago

fix_nvmpi.txt

jocover commented 4 years ago

I remember jetson nano nvenc does not support hardware timestamp, so I added V4L2_BUF_FLAG_TIMESTAMP_COPY flags

teplofizik commented 4 years ago

I don't know about hardware timestamp. It is all about copying timestamp from input to output packet. tv_usec field cropped by system to fit in diapasone 0-999999... And tv_sec field at now not used at all.