Chroma Drop-Frames Display / Codes

If you're experiencing drop frames on Chroma, use the below to check the type of drop.

You can see log in web UI /avenir/settings_scandrop.php (Requires www-for-avenir_1.8.89_all.deb or later)
WARNING:
* will scan /var/log/encoder.log
* will be very heavy loading, not recommended when streaming, etc.
* parsing impl. is written in C for faster processing, but still heavy
* currently i386/x86_64 only

via ssh with tailf /var/log/encoder.log
e.g. tailf /var/log/encoder.log | grep R0

Chroma encoder log prints line like this, showing reason for each drop:
DROP: R0[0] R1[0] R2[0] R3[0] R4[0] R5[0] R6[0] R7[0] R8[1]

Drop Code	Full Code Name	Explanation	Troubleshooting
R0	DROP_CAPTURE	Video capture drops frame	Video signal loss; weak SDI cable/signal, signal loss
R1	DROP_VBUFOVER	Drop due to internal video queue overflow	Possible reason, is hardware is too slow for current settings Reduce Resolution or bitrate, try increase delay, but note that 4K on 32-bit system is limited to 0.7 VBR R2 reasons can cause CAPDELAY , try UDP?
R2	DROP_NETDELAY	Encoder's network thread cannot send data fast enough.	Possible reasons: - decoder not responding or constantly restarting - high amount of packet loss over LDMP or UDP on QoS network Try decrease bitrate, increase ACK, run ABN3 test
R3	DROP_CAPDELAY	Capture buffer state/fullness is higher that requested delay.	Possible reason, is hardware is too slow for current settings Reduce Resolution or bitrate, try increase delay, but note that 4K on 32-bit system is limited to 0.7 VBR R2 reasons can cause CAPDELAY , try UDP?
R4	DROP_FULLDELAY	Capture buffer is full.	Increase VBR Buffer
R5	DROP_SHAPING	Drops due network bitrate shaping.	Try to set Shaping to 0 in LDMP?
R6	DROP_BITRATE	Drop due to bitrate control	Likely network or codec settings are not matching. e.g. HD at 500Kbps; check settings for appropriate bitrate/video
R7	DROP_QUALITY	Drop due to minimal quality settings	E.g. I/P quality set to 40/40 for HD instead of 120/170 for say 4 Mbps. Disable "Prefer Quality Over Framerate" and set quality thresholds higher.
R8	DROP_CODEC	codec decides to drop frames	E.g. could not encode/fit frame at minimum quality, possible reason very low bitrate or high resolution