Allow using video for ControlNet for target type image

[jtreminio]

Note that "Preview" might still not work here.

Hitting the button results in:

[vost#0:0/libx264 @ 0x15d05fc0] Error while opening encoder - maybe incorrect parameters such as bit_rate, rate, width or height.
[vf#0:0 @ 0x15cfa340] Error sending frames to consumers: Generic error in an external library
[vf#0:0 @ 0x15cfa340] Task finished with error code: -542398533 (Generic error in an external library)
[vf#0:0 @ 0x15cfa340] Terminating thread with return code -542398533 (Generic error in an external library)
[vost#0:0/libx264 @ 0x15d05fc0] Could not open encoder before EOF
[vost#0:0/libx264 @ 0x15d05fc0] Task finished with error code: -22 (Invalid argument)
[vost#0:0/libx264 @ 0x15d05fc0] Terminating thread with return code -22 (Invalid argument)
[out#0/mp4 @ 0x15d05640] Nothing was written into output file, because at least one of its streams received no packets.

I worked around this by following your example here.

[jtreminio]

Second commit fixes issue with "Error while opening encoder - maybe incorrect parameters such as bit_rate, rate, width or height":

CleanShot.2026-05-01.at.19.23.33.mp4

[mcmonkey4eva]

Why is this inside the ControlNetPreviewOnly area?

[jtreminio]

I've moved it out to apply to all preprocessors. As mentioned in discord, the incorrect resolution seems to happen for all preprocessors I tested that actually finished:

00:30:06.196 [Info] User local requested 1 image with model 'z-image/Sophos_ZiT_-_v1-1.safetensors'...
00:30:38.745 [Warning] [ComfyUI-1/STDERR] ffmpeg error: [libx264 @ 0x1937f500] height not divisible by 2 (1024x1497)
00:30:38.745 [Warning] [ComfyUI-1/STDERR] [vost#0:0/libx264 @ 0x1937efc0] Error while opening encoder - maybe incorrect parameters such as bit_rate, rate, width or height.
00:30:38.749 [Warning] [ComfyUI-1/STDERR] Traceback (most recent call last):
00:30:38.749 [Warning] [ComfyUI-1/STDERR]   File "/workspace/dlbackend/ComfyUI/execution.py", line 534, in execute
00:30:38.749 [Warning] [ComfyUI-1/STDERR]     output_data, output_ui, has_subgraph, has_pending_tasks = await get_output_data(prompt_id, unique_id, obj, input_data_all, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)
00:30:38.749 [Warning] [ComfyUI-1/STDERR]                                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
00:30:38.749 [Warning] [ComfyUI-1/STDERR]   File "/workspace/dlbackend/ComfyUI/execution.py", line 334, in get_output_data
00:30:38.749 [Warning] [ComfyUI-1/STDERR]     return_values = await _async_map_node_over_list(prompt_id, unique_id, obj, input_data_all, obj.FUNCTION, allow_interrupt=True, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)
00:30:38.749 [Warning] [ComfyUI-1/STDERR]                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
00:30:38.749 [Warning] [ComfyUI-1/STDERR]   File "/workspace/dlbackend/ComfyUI/execution.py", line 308, in _async_map_node_over_list
00:30:38.749 [Warning] [ComfyUI-1/STDERR]     await process_inputs(input_dict, i)
00:30:38.749 [Warning] [ComfyUI-1/STDERR]   File "/workspace/dlbackend/ComfyUI/execution.py", line 296, in process_inputs
00:30:38.749 [Warning] [ComfyUI-1/STDERR]     result = f(**inputs)
00:30:38.749 [Warning] [ComfyUI-1/STDERR]              ^^^^^^^^^^^
00:30:38.749 [Warning] [ComfyUI-1/STDERR]   File "/workspace/src/BuiltinExtensions/ComfyUIBackend/ExtraNodes/SwarmComfyExtra/SwarmSaveAnimationWS.py", line 144, in save_images
00:30:38.749 [Warning] [ComfyUI-1/STDERR]     raise Exception(f"ffmpeg failed: {f_err}")
00:30:38.749 [Warning] [ComfyUI-1/STDERR] Exception: ffmpeg failed: [libx264 @ 0x1937f500] height not divisible by 2 (1024x1497)